SECURITIES AND EXCHANGE COMMISSION

Form 10-K

For the Fiscal year ended December 31, 2004

OR

COOPER CAMERON CORPORATION

Registrant’s telephone number, including area code (713) 513-3300

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

     Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No £

     Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. £

     Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act) Yes þ No £

     The aggregate market value of the Common Stock, par value $0.01 per share, held by non-affiliates of Registrant as of June 30, 2004, our most recently completed second fiscal quarter, was approximately $1,698,171,777. For the purposes of the determination of the above statement amount only, all directors and executive officers of the Registrant are presumed to be affiliates. The number of shares of Common Stock, par value $.01 per share, outstanding as of February 17, 2005, was 54,028,624.

DOCUMENTS INCORPORATED BY REFERENCE
Portions of Registrant’s Annual Report to Stockholders for 2004 — Part II.
Portions of Registrant’s 2005 Proxy Statement for the Annual Meeting of Stockholders
to be held May 5, 2005 — Part III

TABLE OF CONTENTS

PART I

ITEM 1. BUSINESS

     Cooper Cameron Corporation (“Cooper Cameron” or the “Company”) is a leading international manufacturer of oil and gas pressure control and separation equipment, including valves, wellheads, controls, chokes, blowout preventers and assembled systems for oil and gas drilling, production and transmission used in onshore, offshore and subsea applications. Cooper Cameron is also a leading manufacturer of centrifugal air compressors, integral and separable gas compressors and turbochargers. See “Glossary of Terms” at the end of Item 1 for definitions of certain terms used in this section. Any reference to Cooper Cameron Corporation, its divisions or business units within this paragraph or elsewhere within this 10-K as being a leader, leading provider, leading manufacturer, or having a leading position is based on the amount of equipment installed worldwide and available industry data.

     Cooper Cameron’s origin dates back to the mid-1800s with the manufacture of steam engines that provided power for plants and textile or rolling mills. By 1900, with the discovery of oil and gas, Cooper Cameron’s predecessors moved into the production of internal combustion engines and gas compressors. Product offerings were added by the Company’s predecessors through various acquisitions, in particular the acquisitions of The Bessemer Gas Engine Company (gas engines and compressors); Pennsylvania Pump and Compressor (reciprocating air and gas compressors); Ajax Iron Works (compressors); Superior (engines and compressors); Joy Petroleum Equipment Group (valves, couplings and wellheads); Joy Industrial Compressor Group (compressors); and Cameron Iron Works (blowout preventers, ball valves, control equipment and McEvoy-Willis wellhead equipment and choke valves).

     Cooper Cameron, a Delaware corporation, was incorporated on November 10, 1994. The Company operated as a wholly-owned subsidiary of Cooper Industries, Inc. until June 30, 1995, the effective date of the completion of an exchange offer with Cooper Industries’ stockholders resulting in the Company becoming a separate stand-alone company. The common stock of Cooper Cameron trades on the New York Stock Exchange under the symbol “CAM”.

     In 1996, Cooper Cameron purchased the assets and assumed certain operating liabilities of Ingram Cactus Company and acquired interests in the Ingram Cactus joint ventures in Venezuela and Malaysia. The operations were integrated into those of the Cameron division. . The business acquired manufactured wellheads, surface systems, valves and actuators used primarily in onshore oil and gas production operations, and owned manufacturing facilities in, among other places, Oklahoma City and Broussard, Louisiana, as well as in the United Kingdom.

     In 1998, the Company acquired Orbit Valve International, Inc. (“Orbit^®”). Orbit became part of the Cooper Cameron Valves organization. Orbit manufactures and sells high-performance valves and actuators for the oil and gas and petrochemical industries. Orbit’s primary manufacturing facility is located in Little Rock, Arkansas.

     In September 2002, the Company acquired certain assets of Stewart and Stevenson’s Petroleum Equipment Segment, providing product line additions and cost savings opportunities within the Cameron division. In December 2002, the Company acquired Nutron Industries, a valve manufacturer based in Edmonton, Canada. This acquisition expanded the product offerings of the Cooper Cameron Valves division, and provided opportunities to grow sales outside the United States, particularly in Canada.

     In February 2004, the Company acquired Petreco International Inc. (“Petreco”), a Houston, Texas-headquartered supplier of oil and gas separation products, for approximately $90 million, net of cash acquired and debt assumed. Petreco is a market leader in highly engineered custom processing products for the worldwide oil and gas industry.

     In November 2004, the Company acquired certain businesses of the PCC Flow Technologies segment of Precision Castparts Corp. for approximately $79.7 million, net of cash acquired and debt assumed. The operations acquired serve customers in the surface oil and gas production, pipeline and process markets, and include the General Valve business, the PCC Ball Valves business, the TBV specialty valve business, AOP Industries and Sterom S.A., located in Romania.

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Business Segments

Markets and Products

     The Company’s operations are organized into three separate business segments — Cameron, Cooper Cameron Valves and Cooper Compression, each of which conducts business as a division of the Company. For additional business segment information for each of the three years in the period ended December 31, 2004, see Note 14 of the Notes to Consolidated Financial Statements, which Notes are incorporated herein by reference in Part II, Item 8 hereof (“Notes to Consolidated Financial Statements”).

      Cameron Division

     Cameron is one of the world’s leading providers of systems and equipment used to control pressures and direct flows of oil and gas wells. Its products are employed in a wide variety of operating environments including basic onshore fields, highly complex onshore and offshore environments, deepwater subsea applications and ultra-high temperature geothermal operations.

     Cameron’s products include surface and subsea production systems, blowout preventers, drilling and production control systems, gate valves, actuators, chokes, wellheads, drilling riser and aftermarket parts and services. Cameron’s products are marketed under the brand names Cameron^®, W-K-M^®, McEvoy^® and Willis^®. Additionally, Cameron manufactures elastomers, which are used in pressure and flow control equipment and other petroleum industry applications, as well as in the petroleum, petrochemical, rubber molding and plastics industries.

     Cameron’s aftermarket program, CAMSERV™, combines traditional aftermarket services and products, such as equipment maintenance and reconditioning, with Cameron’s information technology toolset. CAMSERV is designed to provide flexible, cost-effective solutions to customer aftermarket needs throughout the world. Cameron also provides an inventory of repair parts, service personnel, planning services and inventory and storage of customers’ idle equipment. Over the years, Cameron has continued to enhance its aftermarket presence worldwide with new facilities in Brazil, Mexico, Angola, Newfoundland, and Onne Port, Nigeria (which will be completed in the first quarter of 2005).

     As petroleum exploration activities have increasingly focused on subsea locations, Cameron has directed much of its new product development efforts toward this market. Cameron’s patented SpoolTree™ horizontal subsea production system, which was introduced in 1993, is used in oil and gas fields with subsea completions that require frequent retrieval of downhole equipment. With the SpoolTree system, well completion and workover activities can be performed without a workover riser or removal of the Christmas tree and under conventional blowout preventer control, thereby reducing the time, equipment and expense needed to perform such activities. Cameron advanced its tradition of innovation with the introduction of an all-electric subsea production system, CameronDC^™, which is designed to offer greater reliability and provide substantial cost savings to customers.

     The Cameron Willis Chokes business unit was formed to focus resources on the choke product line with the goal of enhancing Cameron’s performance in this product line. Cameron Willis manufactures Cameron and Willis brand chokes and Cameron brand actuators for the surface and subsea production markets. The Company’s primary choke manufacturing operations are located in Longford, Ireland, and its primary surface gate valve actuator manufacturing operations are located at the Cameron Willis plant in Houston, Texas.

     Cameron’s research center located in Houston, Texas has ten specially designed test bays to test and evaluate Cameron’s products under realistic conditions. These include environmental test chambers to simulate extreme pressures and temperatures, high-strength fixtures for the application of multi-million pound tensile and bending loads, high pressure gas compressors and test enclosures, a hyperbaric chamber to simulate the external pressures of deepwater environments, and two circulation loops for erosion and flow testing.

     During 2002, Cameron introduced the new Environmental Safe Guard (ESG^™) system, which combines a traditional surface blowout preventer with a subsea device (the ESG unit) at the bottom of the drilling string. This allows operators to use the less expensive second- or third-generation semi submersible rigs, instead of fourth- or

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fifth-generation units, to drill in deepwater locales. These systems have since been deployed offshore Brazil, Indonesia and in the Mediterranean Sea.

     In February of 2004, with the Company’s acquisition of Petreco, Cameron assumed a leading position in the surface oil and gas separation business and an entrée into the subsea processing business. Petreco’s products include electrostatic desalters and dehydrators, hydrocyclones, desanders, floatation equipment, processing equipment, gas processing equipment and electrochlorinators. These products are marketed under the brand names Petreco^®, Vortoil^®, Krebs^®, Unicel^®, Wemco^®, Metrol^™, KCC^™, Depurator^® and BFCC^™.

     In April 2004, the Offshore Systems organization was formed to improve focus, visibility and accountability in large offshore projects, which have become increasingly large and important components of the Cooper Cameron served market.

     The 2004 acquisition by the Company of certain assets and businesses of PCC Flow Technologies brought with it PCC Sterom, now Sterom S.A., which has a plant in Romania manufacturing a range of wellheads and valves, providing Cameron with a competitive source for these products.

     Cameron primarily markets its products directly to end-users through a worldwide network of sales and marketing employees, supported by agents in some international locations. Due to the technical nature of many of the products, the marketing effort is further supported by a staff of engineering employees.

     Cameron’s primary customers include oil and gas majors, independent producers, engineering and construction companies, drilling contractors, rental companies and geothermal energy producers.

      Cooper Cameron Valves Division

     Cooper Cameron Valves (CCV) is a leading provider of valves and related systems primarily used to control pressures and direct the flow of oil and gas as they are moved from individual wellheads through flow lines, gathering lines and transmission systems to refineries, petrochemical plants and industrial centers for processing. Large diameter valves are used primarily in natural gas transmission lines. Smaller valves are used in oil and gas gathering and processing systems and in refineries and petrochemical plants. Equipment used in these environments is generally required to meet demanding API 6D and American National Standards Institute (ANSI) standards.

     CCV’s products include gate valves, ball valves, butterfly valves, Orbit valves, rotary process valves, block & bleed valves, plug valves, globe valves, check valves, actuators, chokes and aftermarket parts and services. These products are marketed under the brand names Cameron^®, W-K-M^®, Orbit^®, Demco^®, Foster^®, NAVCO^®, Nutron^®, Thornhill Craver^™ and TruSeal^®. During the first quarter of 2000, CCV expanded its field service capabilities with the acquisition of Valve Sales Inc., a Houston-based valve repair and manufacturing company. As described previously, Nutron, a Canadian valve manufacturer, was acquired in December 2002 in order to further expand CCV’s product offerings, particularly in Canada.

     A major focus during 2003 was rationalization of facilities and the related costs. These efforts included the restructuring of the Oklahoma City plant and the consolidation of CCV’s four Edmonton, Canada facilities into one location. Another area of focus in 2003 was the expansion of the aftermarket business. Six new facilities were added during 2003, including four outside the U.S., and three existing facilities were expanded. CCV now has a total of 15 aftermarket locations worldwide.

     In 2004, with the Company’s acquisition of certain businesses and assets of PCC Flow technologies, CCV acquired a wider range of product offerings, including the double-block and bleed TwinSeal™ line, the TBV™ high-end ball valves intended for use in cryogenic and other severe service applications, and the Techno™ check valves. The business lines acquired include General Valve, AOP Industries, TBV Techno and the former PCC Ball Valve Italy, which brings to CCV, a leader in welded ball valves, a full range of take-apart bolted body ball valves.

     CCV markets its equipment and services through a worldwide network of combined sales and marketing employees, distributors and agents in selected international locations. Due to the technical nature of many of the products, the marketing effort is further supported by a staff of engineering employees.

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     CCV’s primary customers include oil and gas majors, independent producers, engineering and construction companies, pipeline operators, drilling contractors and major chemical, petrochemical and refining companies.

      Cooper Compression Division

     Cooper Compression was created in 2002 through the combination of Cooper Energy Services (CES) and Cooper Turbocompressor (CTC). The business is divided into Reciprocating Technology, which encompasses the products and services historically provided by CES, and Centrifugal Technology, which encompasses the air and gas compression markets traditionally served by CTC.

     Cooper Compression is a leading provider of reciprocating and centrifugal technology applications. Cooper Compression’s products include aftermarket parts and services, integral reciprocating engine-compressors, reciprocating compressors, turbochargers, integrally geared centrifugal compressors, and compressor systems. Its aftermarket services include spare parts, technical services, repairs, overhauls and upgrades.

     Cooper Compression’s products and services are marketed under the Ajax^®, Superior^®, Cooper-Bessemer^®, Penn^™, Enterprise^™, Texcentric®, Compression Specialties^™, Turbine Specialties^™ (reciprocating products) and Turbo Air^®, Genuine Joy^® (aftermarket parts only), Dry Pak^™, TA^™ and MSG^® (centrifugal products) brand names. Cooper Compression provides global support for its products and maintains sales and/or service offices in key international locations.

Reciprocating Technology

     Cooper Compression provides Ajax integral engine-compressors (140 to 880 horsepower), which combine the engine and compressor on a single drive shaft, and are used for gas re-injection and storage, as well as on smaller gathering and transmission lines. In addition, a 1,800 RPM separable compressor, featuring low vibration and couple-free design features, was added in 2001. This product was significantly upgraded during 2004 to enhance its efficiency and will be launched in 2005 in the compressed natural gas market. These compressors (100 to 280 horsepower) are also sold in gas gathering, drilling and compressed natural gas markets.

     Superior reciprocating compressors (100 to 9,000 horsepower) are used primarily for natural gas applications, including production, storage, withdrawal, processing and transmission, as well as petrochemical processing. The Superior WG compressor series was introduced in 2000 for large project applications up to 9,000 horsepower. These high-speed separable compressor units can be matched with either natural gas engine drivers or electric motors and provide a cost advantage over competitive equipment in the same power range. In 2004, Cooper Compression further enhanced its product offerings by developing a new compressor cylinder line that provides customers better operating flexibility. These are marketed under the “RAM” trade name. Additionally, a new line of compressor frames is under development and scheduled for launch in 2005.

     There is an installed base of Cooper-Bessemer, Penn, Enterprise, Superior, Ajax and Joy engines and compressors (up to 30,000 horsepower) for which Cooper Compression provides replacement parts and service on a worldwide basis. During 2004, a major expansion to the Company’s industry-leading turbocharger capabilities was completed, providing expanded services and faster product deliverability.

     Cooper Compression’s channel to market utilizes a distributor network in North America for new reciprocating compressors and direct selling for most international customers. These channels are continually rationalized to provide maximum exposure for the Company’s products. During 2004, Cooper Compression continued to refine its channels and has added new partners in key markets and locations to better support the current strong compression needs.

     As part of its restructuring, Cooper Compression constructed a Superior separable compressor plant and research and development center in Waller, Texas in 2000. Each manufacturing station in the plant is designed for short cycle, just-in-time machining and assembly to reduce inventory requirements and product lead times. The plant is designed to manufacture the division’s complete line of Superior compressor units to serve the natural gas market.

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     Cooper Compression continued its restructuring efforts in 2002 with the decision to close an additional 13 facilities worldwide in order to properly size the business to current market conditions. These actions were largely completed during 2003.

     In 2004, the Turbine Services group moved into a newly renovated facility and Cooper Compression division management relocated to its new Bingle Road (Houston) headquarters.

     Cooper Compression’s primary customers in reciprocating technology include gas transmission companies, compression leasing companies, oil and gas producers and processors and independent power producers.

Centrifugal Technology

     Cooper Compression also manufactures and supplies integrally geared centrifugal compressors, compressor systems, as well as aftermarket services, to customers around the world. Centrifugal air compressors, used primarily in manufacturing processes, are sold under the trade name of Turbo Air, with specific models including the TA-2000, TAC-2000, TA-3000, TA-6000, TA-11000 and TA-20000. Engineered compressors are used in the process air and gas markets and are identified by the trade names of Turbo Air and MSG.

     The process and plant air centrifugal compressors deliver oil-free compressed air and other gases to the customer, thus preventing oil contamination of the finished products. Worldwide customers increasingly prefer oil-free air for quality, safety, operational and environmental reasons.

     Cooper Compression provides installation and maintenance service, parts, repairs, overhauls and upgrades to its worldwide customers for plant air and process gas compressors. It also provides aftermarket service and repairs on all equipment it produces through a worldwide network of distributors, service centers and field service technicians utilizing an extensive inventory of parts.

     Cooper Compression’s customers in centrifugal technology are petrochemical and refining companies, natural gas processing companies, durable goods manufacturers, utilities, air separation and chemical companies.

Market Issues

     Cooper Cameron, through its segments, is one of the leaders in the global market for the supply of petroleum production equipment. Cooper Cameron believes that it is well positioned to serve these markets. Plant and service center facilities around the world in major oil- and gas-producing regions provide a broad market coverage.

     The global market continues to be a source of growth for Cooper Cameron. The desire to expand oil and gas resources and transmission capacity in developed and developing countries, for both economic and political reasons, continues to be a major factor affecting market demand. Additionally, establishment of industrial infrastructure in the developing countries will necessitate the growth of basic industries that require plant air and process compression equipment. Production and service facilities in North and South America, Europe, the Far and Middle East and West Africa provide the Company with the ability to serve the global marketplace.

     In each of Cooper Cameron’s business segments, a large population of installed engines, compression equipment, and oil and gas production equipment exists in the worldwide market segments. The rugged, long-lived nature of the equipment provides a relatively stable repair parts and service business. However, with respect to Cooper Compression, approximately 35% of that segment’s revenues come from the sale of replacement parts for equipment that the Company no longer manufactures. Many of these units have been in service for long periods of time and are gradually being replaced. As this installed base of legacy equipment declines, the Company’s potential market for parts orders is also reduced. In recent years, the Company’s revenues from replacement parts associated with legacy equipment have declined nominally. Notwithstanding, significant product development and service attention is directed toward this legacy population in order to keep them in service. Retrofits targeted to emissions reduction, efficiency improvement and safety remain areas of focus.

     In recent years, the Company’s Cameron Division has been expanding into the deepwater subsea systems market. This market is significantly different from the Company’s other markets since deepwater subsea systems

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projects are significantly larger in scope and complexity, in terms of both technical and logistical requirements. Deepwater subsea projects (i) typically involve long lead times, (ii) typically are larger in financial scope, (iii) typically require substantial engineering resources to meet the technical requirements of the project, and (iv) often involve the application of existing technology to new environments and, in some cases, new technology. These projects accounted for nearly 15% of revenues in 2004.

Geographic Breakdown of Revenues

     Revenues for the years ended December 31, 2004 and 2003 were generated from shipments to the following regions of the world (dollars in thousands):

New Product Development

     Cameron has introduced several new drilling products during the last several years. These new products include the 3.5 million-pound load capacity LoadKing^™riser system, used for drilling in up to 10,000-foot water depths; a new lightweight and lower-cost locking mechanism for subsea BOPs; and a new generation of variable-bore ram packers. Other Cameron-developed products have won awards for innovation. Cameron’s Freestanding Drilling Riser, introduced in 1999, was a winner of the Petroleum Engineer International Special Meritorious Award for Engineering Innovation. During 2002, Cameron’s new Environmental Safe Guard system received World Oil® magazine’s prestigious “Next Generation” award as “Best Drilling/Completion Solution.”

     During 2002, Cameron marked the tenth anniversary of its introduction of the patented SpoolTree™ subsea production system, a tree design referred to generically as a horizontal subsea tree. The SpoolTree has received numerous awards for its advanced technology and innovation, was recognized for its contributions to the industry at the Offshore Technology Conference in Houston during May 2002, and resulted in Cameron receiving the prestigious Queen’s Award for Enterprise in the U.K. in 2002. A Cameron SpoolTree was installed in 2002 at a depth of 7,209 feet in Marathon’s Camden Hill field in the Gulf of Mexico, a record depth at the time.

     In May 2004, the Cameron division unveiled its CameronDC subsea production system at the Offshore Technology Conference in Houston, Texas. This is the world’s first DC-powered, all-electric system, designed for increased reliability and improved performance in deepwater applications. The Company has more than 45 patents on this system.

     Several new controls products have also been added. Cameron launched a new electro-hydraulic drilling control system in 1997 and a new subsea production control system in 1998. In 2001, the Company expanded the CAMTROL system to include all of Cameron’s controls capabilities, including production, drilling and workover. In May 2002, Cameron enhanced its production controls offering by upgrading the controllers and software. These improvements follow the CAMTROL design philosophies of modularity and redundancy.

     During 2003, Cameron began production of a new lower-cost compact wellhead system. Several of these systems were installed in fields in upstate New York. Additionally, a new valve was designed for extreme applications where manually operated valves would not be a preferred option. This product has been successful in large-bore, high-pressure gas applications and in well stimulation activity, particularly in the Gulf Coast region.

     In 2000, CCV completed the development of a range of 2” to 16” ball valves capable of performing at pressures of 10,000 psi and in water depths of 10,000 feet.

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     In 2004, CCV introduced a new actuator named ActraCam™ to operate its all-welded Cameron ball valve.

     Through the introduction of its new compressor frames, Cooper Compression’s standard product range was extended up to 2,500 horsepower, positioning it as a viable supplier of turbo plant air compressors in a wide range of horsepowers. One of the new products, the TAC-2000, won 2001’s Silver Award for Product of the Year from Plant Engineering magazine. In 2001, remote monitoring was added to the control system capabilities. The new Vantage controller is available as an upgrade kit for both proprietary and competitor compressors.

     Cooper Compression’s product range has been expanded through the addition of new compressor frames (TA-6000, TAC-2000, TA-11000 and TA-20000) and the addition of trademarked accessories such as Dry Pak heat of compression dryers and Turboblend, a hydro-cracked turbomachinery lubricating oil. In 2001, the Engineered Compressor product line was redefined and the MSG Renaissance program was introduced to update the MSG product line.

     Cooper Compression has focused product development resources to further expand its high-efficiency plant air compressor line and to provide engineered compressors matched to the requirements of its customers. The latter is being achieved by advances in aerodynamic and rotor dynamic analytical design capability. The year 2001 saw the addition of centrifugal gas applications.

     Cooper Compression’s suite of reciprocating compressors was also expanded in 2004. New compressor frames and cylinders will be introduced in the future, further expanding the broad product line.

Competition

     Cooper Cameron competes in all areas of its operations with a number of other companies, some of which have financial and other resources comparable to or greater than those of Cooper Cameron.

     Cooper Cameron has a leading position in the petroleum production equipment markets, particularly with respect to its high-pressure products. In these markets, Cooper Cameron competes principally with Balon Corporation, Circor International, Inc., Dril-Quip, Inc., Dresser Valve, FMC Technologies, Inc., Hydril Company, Aker Kvaerner, Masterflo, Varco International, Inc., Wood Group, Vetco International, NATCO Group, Inc., CB & I Howe-Baker, Hanover Compressor Company, Tyco International Ltd., Petrovalve (a Flotek Industries, Inc. company), Pibiviese, PBV-USA, Inc. (a Zy-Tech Global Industries company), Bettis, Shafer (Valve Automation division of Emerson Process Management, FlowServ (an Edwards Valves company), and GE Gemini (a member of the GE Oil & Gas Group).

     The principal competitive factors in the petroleum production equipment markets are technology, quality, service and price. Cooper Cameron believes several factors give it a strong competitive position in these markets. Most significant are Cooper Cameron’s broad product offering, its worldwide presence and reputation, its service and repair capabilities, its expertise in high-pressure technology and its experience in alliance and partnership arrangements with customers and other suppliers.

     Cooper Cameron also has a strong position in the compression equipment markets. In these markets, Cooper Cameron competes principally with the Dresser-Rand division of First Reserve Corporation, Demag, GHH/Borsig, Elliott Company (an Elliott Ebara Group company) Ariel Corporation, Atlas-Copco AB, Endyn Energy Dynamics, CECO (a Compressor Engineering Corporation company), Hoerbiger Group, TCS, Universal Compression and IR Air Solutions The principal competitive factors in the compression equipment markets are engineering and design capabilities, product performance, reliability and quality, service and price. Cooper Cameron has a competent engineering staff and skilled technical and service representatives, with service centers located throughout the world.

Manufacturing

     Cooper Cameron has manufacturing facilities worldwide that conduct a broad variety of processes, including machining, fabrication, assembly and testing using a variety of forged and cast alloyed steels and stainless steel as the primary raw materials. In recent years, Cooper Cameron has rationalized plants and products, closed various manufacturing facilities, moved product lines to achieve economies of scale, and upgraded the remaining facilities.

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This is an ongoing process as the Company seeks ways to improve delivery performance and reduce costs. Cooper Cameron maintains advanced manufacturing, quality assurance and testing equipment geared to the specific products that it manufactures and uses extensive process automation in its manufacturing operations. The manufacturing facilities utilize computer-aided, numeric-controlled tools and manufacturing techniques that concentrate the equipment necessary to produce similar products in one area of the plant in a configuration commonly known as a manufacturing cell. One operator in a manufacturing cell can monitor and operate several machines, as well as assemble and test products made by such machines, thereby improving operating efficiency and product quality.

     Cooper Cameron’s test capabilities are critical to its overall processes. The Company has the capability to test most equipment at rated operating conditions, measuring all operating parameters, efficiency and emissions. All process compressors for air separation and all plant air compressors are given a mechanical and aerodynamic test in a dedicated test center prior to shipment.

     All of Cooper Cameron’s Asian, European and Latin American manufacturing plants are ISO certified and API licensed. Most of the U.S. plants are ISO certified, and certification is planned for the remainder. ISO is an internationally recognized verification system for quality management.

Backlog

     Cooper Cameron’s backlog was approximately $1,000.0 million at December 31, 2004, (approximately 85% of which is expected to be shipped during 2005) as compared to $946.6 million at December 31, 2003, and $827.8 million at December 31, 2002. Backlog consists of customer orders for which a purchase order has been received, satisfactory credit or financing arrangements exist and delivery is scheduled.

Patents, Trademarks and Other Intellectual Property

     As part of its ongoing research, development and manufacturing activities, Cooper Cameron has a policy of seeking patents when appropriate on inventions involving new products and product improvements. Cooper Cameron owns 280 unexpired United States patents and 500 unexpired foreign patents. During 2004, 18 new U.S. and 41 new foreign patent applications were filed.

     Although in the aggregate these patents are of considerable importance to the manufacturing of many of its products, Cooper Cameron does not consider any single patent or group of patents to be material to its business as a whole.

     Trademarks are also of considerable importance to the marketing of Cooper Cameron’s products. Cooper Cameron considers the following trade names to be material to its business as a whole: Cameron, Cooper-Bessemer, Ajax, Willis and W-K-M. Other important trademarks used by Cooper Cameron include C-B Turbocharger™, Demco, DryPak, Dynacentric^™, Dynaseal^™, Enterprise, Foster, Genuine Joy, H & H^™, McEvoy, MSG, NAVCO^®, Nickles Industrial, Nutron^®, Orbit, Penn, POW-R-SEAL^™, Quad 2000™, SAF-T-SEAL^™, Superior, TA, Texcentric, Thornhill Craver, TruSeal, Turbine Specialties (Reciprocating Products), Turbo Air VANTAGE^™, TwinSeal, TBV, Techno, Petreco, Vortoil, Krebs, Unicel, Wemco, Metrol, KCC, Depurator and BFCC.

     Cooper Cameron has the right to use the trademark Joy on aftermarket parts until November 2027. Cooper Cameron has registered its trademarks in the countries where such registration is deemed material.

     Cooper Cameron also relies on trade secret protection for its confidential and proprietary information. Cooper Cameron routinely enters into confidentiality agreements with its employees, partners and suppliers. There can be no assurance, however, that others will not independently obtain similar information or otherwise gain access to Cooper Cameron’s trade secrets.

Employees

     As of December 31, 2004, Cooper Cameron had approximately 8,825* employees, of which approximately 1,893 were represented by labor unions. On July 1, 2004, Cameron signed a new two-year contract, expiring on June 30, 2006, with the Shipbuilding and Marine Engineering Employees’ Union representing 235 employees in its

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Singapore facility. In addition, Cameron signed a two-year contract on August 22, 2004, expiring on August 19, 2006, with the International Association of Machinist and Aerospace Workers representing 46 workers at its Brookshire, Texas facility. The Company’s relations with both of these unions are excellent and the signing of these agreements provides a stable environment for both facilities. There are no agreements scheduled to expire in 2005. Labor relations with these and other bargaining units are excellent.

     With the acquisition in November 2004 of PCC, Cameron added a unionized facility in Campina, Romania. The agreement with Contract Colectiv de Munca (PCC Sterom S.A. — Union PCC Sterom) represents 525 manufacturing employees.

     The PCC acquisition also added two unions to the Cooper Cameron Valves organization. In Italy, approximately 85 management and hourly employees are covered by two national contracts, FNDI and FION CGIL. These contracts will expire in 2006.

*net of contractors

Executive Officers of the Registrant

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Available Information

     Cooper Cameron’s website is www.coopercameron.com. Information available free of charge on the Company’s website includes previously filed reports with the Securities and Exchange Commission (SEC), charters of the Company’s Audit and Compensation and Governance Committees of the Board, the Company’s Code of Ethics for Management Personnel and Code of Business Conduct and Ethics for Directors, The Company’s Corporate Governance Guidelines, press releases and other documents that may be required to be made available by the SEC or the New York Stock Exchange. The information on the Company’s website is updated as soon as reasonably practicable.

     The information on the Company’s website is not, and shall not be deemed to be, a part of this Form 10-K or any other filing the Company makes with the SEC. Additionally, the Company's previously filed reports and statements are also available at the SEC’s website, www.sec.gov.

Glossary of Terms

Actuator. A hydraulic or electric motor used to open or close valves.

Blowout Preventer. A hydraulically operated system of safety valves installed at the wellhead during drilling and completion operations for the purpose of preventing an increase of high-pressure formation fluids — oil, gas or water — in the wellbore from turning into a “blowout” of the well.

Choke. A type of valve used to control the rate and pressure of the flow of production from a well or through flowlines.

Christmas tree. An assembly of valves, pipes and fittings used to control the flow of oil and gas from a well.

Compressor. A device used to create a pressure differential in order to move or compress a vapor or a gas.

Centrifugal compressor. A compressor with an impeller or rotor, a rotor shaft and a casing which discharges gases under pressure by centrifugal force.

Integral reciprocating engine-compressor. A compressor in which the crankshaft is shared by the engine and compressor, each having its own piston rods driven by the shared crankshaft.

Integrally geared centrifugal compressor. A compressor in which the motor is geared so that the compressor runs at higher rpms than the motor itself to gain efficiency.

Reciprocating compressor. A compressor in which the compression effect is produced by the reciprocating motion of pistons and plungers operating in cylinders.

Controls. A device which allows the remote triggering of an actuator to open or close a valve.

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Elastomer. A rubberized pressure control sealing element used in drilling and wellhead applications.

Riser. Pipe used to connect the wellbore of offshore wells to drilling or production equipment on the surface, and through which drilling fluids or hydrocarbons travel.

Valve. A device used to control the rate of flow in a line, to open or shut off a line completely, or to serve as an automatic or semi-automatic safety device.

Wellhead. The equipment installed at the surface of a wellbore to maintain control of a well and including equipment such as the casing head, tubing head and Christmas tree.

ITEM 2. PROPERTIES

     The Company currently operates manufacturing plants ranging in size from approximately 21,000 square feet to approximately 447,000 square feet of manufacturing space. The Company also owns and leases warehouses, distribution centers, aftermarket and storage facilities, and sales offices. The Company leases its corporate headquarters office space and space for the Cameron and CCV division headquarters in Houston, Texas.

     The Company manufactures, markets and sells its products and provides services throughout the world, operating facilities in numerous countries. At December 31, 2004, the significant facilities used by Cooper Cameron throughout the world for manufacturing, distribution, aftermarket services, machining, storage and warehousing contained an aggregate of approximately 7,384,753 square feet of space, of which approximately 5,272,298 square feet (71%) was owned and 2,112,455 (29%) was leased. Of this total, approximately 4,460,828 square feet of space (60%) is located in the United States and Canada, 410,259 square feet of space (6%) is located in Mexico and South America, and 2,513,666 square feet of space (34%) is located in Europe, Africa and Asia. The table below shows the number of significant manufacturing, warehouse and distribution and aftermarket facilities by business segment and geographic area. Cameron and CCV share space in certain facilities and, thus, are being reported together.

     Cooper Cameron believes its facilities are suitable for their present and intended purposes and are adequate for the Company’s current and anticipated level of operations.

ITEM 3. LEGAL PROCEEDINGS

     Cooper Cameron is a party to various legal proceedings and administrative actions, including certain environmental matters discussed below. In the opinion of Cooper Cameron’s management, such proceedings and actions should not, individually or in aggregate, have a material adverse effect on the Company’s results of operations or financial condition.

     Environmental Matters

     The Company’s worldwide operations are subject to domestic and international regulations with regard to air, soil and water quality as well as other environmental matters. The Company, through its environmental management system and active audit program, believes it is in substantial compliance with these regulations. Cooper Cameron is committed to the health and safety of its employees, neighbors and users of its products and to the protection of the environment.

     Cooper Cameron has been identified under the Comprehensive Environmental Response Compensation and Liability Act (“CERCLA”) as a potentially responsible party (“PRP”) at four Superfund sites.

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     The Company’s involvement at three of the sites is believed to be at a de minimis level. The fourth site is Osborne, Pennsylvania (a landfill into which the Cooper Compression operation in Grove City, Pennsylvania deposited waste), where remediation is complete and remaining costs relate to ongoing ground water treatment and monitoring. The Company is also engaged in site cleanup under the Voluntary Cleanup Plan of the Texas Commission on Environmental Quality at former manufacturing locations in Houston and Missouri City, Texas. The Company believes, based on its review and other factors, that the estimated costs related to these sites will not have a material adverse effect on the Company’s results of operations, financial condition or liquidity. Additionally, the Company has discontinued operations at a number of other sites which had previously been in existence for many years. The Company does not believe, based upon information currently available, that there are any material environmental liabilities existing at these locations. Remediation costs are accrued based upon estimates related to known environmental conditions and existing environmental regulations and those costs are not discounted. Such costs primarily represent testing, monitoring and treatment costs. As of December 31, 2004, the Company’s consolidated financial statements include a liability balance of $7.3 million for environmental matters. See “Environmental Remediation” in Management’s Discussion and Analysis of Results of Operations and Financial Condition of Cooper Cameron for additional information.

     Cooper Cameron is a named defendant in three lawsuits regarding contaminated underground water in a residential area adjacent to a former manufacturing site of one of its predecessors. In Valice v. Cooper Cameron Corporation (80th Jud. Dist. Ct., Harris County, filed June 21, 2002), the plaintiffs claim that the contaminated underground water has reduced property values and threatens the health of the area residents and request class action status which, to date, has not been granted. The plaintiffs seek an analysis of the contamination, reclamation, and recovery of actual damages for the loss of property value. There are approximately 150 homes in the affected area with an estimated aggregate appraised value of approximately $150 million. In Oxman vs. Meador, Marks, Heritage Texas Properties, and Cooper Cameron Corporation (80th Jud. Dist. Ct., Harris County, filed February 7, 2003), and Kramer v. Cooper Cameron (190th Judicial District, Harris County, filed May 29, 2003), the plaintiffs purchased property in the area and allege a failure by the defendants to disclose the presence of contamination and seek to recover unspecified monetary damages. The Company has been and is currently working with the Texas Commission on Environmental Quality and continues to monitor the underground water in the area. The Company is of the opinion that there is no risk to area residents and that the lawsuits, to the extent they have any merit, essentially reflect concerns over possible declines in property value. In an effort to mitigate homeowners’ concerns and reduce potential exposure from any such decline in property values, the Company has entered into 22 written agreements with residents that obligate the Company to either reimburse sellers in the area for the estimated decline in value due to a potential buyer’s concerns related to the contamination or to purchase the property after an agreed marketing period. Twelve of these agreements remain outstanding. To date, the Company has 3 properties it has purchased that remain unsold, with an aggregate appraised value of $11,315,000 The Company has also negotiated settlements with owners of 4 properties sold in the area which were not subject to any written agreement with the Company. The Company has recognized total expenses of $4.8 million related to the various agreements with homeowners. The Company believes any potential exposure from these agreements, or, based on its review of the facts and law, any potential exposure from these, or similar, suits will not have a material adverse effect on its results of operations, financial condition or liquidity.

     Other Matters

     Cooper Cameron has been a named defendant in a number of multi-defendant, multi-plaintiff tort lawsuits since 1995, 132 of which have been closed and 262 of which remain open. Of the 132 cases closed, 45 have been by settlement at a cost of approximately $19,000 per case. The Company made no settlement payments in the remaining 87 cases. As of December 31, 2004, the Company’s consolidated balance sheet included a liability of $3.4 million for the 262 cases which remain open. The Company believes, based on its review of the facts and law, that the potential exposure from the remaining suits will not have a material adverse effect on its results of operations, financial condition or liquidity.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     There were no matters submitted to a vote of security holders during the fourth quarter of 2004.

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PART II

     The common stock of Cooper Cameron, par value $.01 per share (together with the associated Rights to Purchase Series A Junior Participating Preferred Stock), is traded on the New York Stock Exchange (“NYSE”). No dividends were paid during 2004.

     The following table indicates the range of trading prices on the NYSE for January 2, 2004 through December 31, 2004 and for January 2, 2003 through December 31, 2003.

     As of February 18, 2005, the approximate number of stockholders of record of Cooper Cameron common stock was 1,423.

     Information concerning securities authorized for issuance under equity compensation plans is included in Note 9 of the Notes to Consolidated Financial Statements, which notes are incorporated herein by reference in Part II, Item 8 hereof (“Notes to Consolidated Financial Statements”).

ITEM 6. SELECTED FINANCIAL DATA

     The information set forth under the caption “Selected Consolidated Historical Financial Data of Cooper Cameron Corporation” on page 66 in the 2004 Annual Report to Stockholders is incorporated herein by reference.

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     The information set forth under the caption “Management’s Discussion and Analysis of Results of Operations and Financial Condition of Cooper Cameron Corporation” on pages 25-36 in the 2004 Annual Report to Stockholders is incorporated herein by reference.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     The information for this item is set forth in the section entitled “Market Risk Information” on page 35 in the 2004 Annual Report to Stockholders and is incorporated herein by reference.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

     The following consolidated financial statements of the Company and the independent registered public accounting firm’s report set forth on pages 38-65 in the 2004 Annual Report to Stockholders are incorporated herein by reference:

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     Report of Independent Registered Public Accounting Firm on Report on Controls Over Financial Reporting.

     Report of Independent Registered Public Accounting Firm.

     Consolidated Results of Operations for each of the three years in the period ended December 31, 2004.

     Consolidated Balance Sheets as of December 31, 2004 and 2003.

     Consolidated Cash Flows for each of the three years in the period ended December 31, 2004.

     Consolidated Changes in Stockholders’ Equity for each of the three years in the period ended December 31, 2004.

     Notes to Consolidated Financial Statements.

     None.

ITEM 9A. CONTROLS AND PROCEDURES

     Within the 90-day period prior to the filing of this Annual Report on Form 10-K, the Company carried out an evaluation, under the supervision and with the participation of the Company’s Disclosure Committee and the Company’s management, including the Chief Executive Officer and the Chief Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures, as defined by Exchange Act Rule 13a-14. Based upon that evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that the Company’s disclosure controls and procedures are effective in ensuring that information required to be disclosed by the Company is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Other than the conversion of the Company’s Petreco operations to its enterprise-wide business and financial system, there has been no change in the Company’s internal controls over financial reporting that occurred during the three months ended December 31, 2004 that has materially affected, or is reasonably likely to materially affect, the Company’s internal controls over financial reporting.

ITEM 9B. OTHER INFORMATION

     The information set forth under the caption “Management’s Report on Internal control over financial Reporting” on page 37 of the 2004 Annual Report to Stockholders is incorporated herein by reference.

PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Information regarding Section 16(a) compliance, the Audit Committee, the Company’s Code of Business Ethics and Ethics for Directors, shareholder nominating procedures and background of the directors appearing under the captions “Section 16(a) Beneficial Ownership Reporting Compliance”, “Information Concerning the Board of Directors”, and “Security Ownership of Management” in the Company’s Proxy Statement for the 2005 Annual Meeting of Stockholders is hereby incorporated by reference.

     The Registrant has adopted a code of ethics that applies to all employees, including its principal executive officer, principal financial officer, principal accounting officer and its Board of Directors. A copy of the code of ethics is available on the Registrant’s Internet website at www.coopercameron.com and is available in print to any shareholder free of charge upon request. The Registrant intends to satisfy the disclosure requirements under Item 10 of Form 8-K regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to its principal executive officer, principal financial officer, principal accounting officer or persons performing similar functions, by posting such information on its website at the Internet website address set forth above.

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     The information under the heading “Executive Officers of the Registrant” in Part I, Item 1 of this Form 10-K is incorporated by reference in this section.

ITEM 11. EXECUTIVE COMPENSATION

     Information appearing under the captions “Directors’ Compensation” and “Executive Compensation” (other than the Compensation and Governance Committee Report on Executive Compensation) in the 2005 Proxy Statement is hereby incorporated by reference.

     Information setting forth the security ownership of certain beneficial owners and management appearing under the captions “Security Ownership of Certain Beneficial Owners” and “Security Ownership of Management” and information appearing under the caption “Equity Compensation Tables” in the 2005 Proxy Statement is hereby incorporated by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Information regarding certain related transactions appearing under the captions “Governance” and “Executive Compensation” in the 2005 Proxy Statement is hereby incorporated by reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

     Information appearing under the captions “Principal Accountant Firm Fees” and “Pre-approval Policies and Procedures” in the 2005 Proxy Statement is hereby incorporated by reference.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) The following documents are filed as part of this Report:

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders
Cooper Cameron Corporation

We have audited the consolidated financial statements of Cooper Cameron Corporation (the “Company”) as of December 31, 2004 and 2003, and for each of the three years in the period ended December 31, 2004, and have issued our report thereon dated February 23, 2005 (incorporated by reference in this Form 10-K). Our audits also included the financial statement schedule included in Item 15(a)(2) of this Form 10-K. This schedule is the responsibility of the Company’s management. Our responsibility is to express an opinion based on our audits.

In our opinion, the financial statement schedule referred to above, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

/s/ Ernst & Young LLP

ERNST & YOUNG LLP

Houston, Texas
February 23, 2005

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Schedule II — Valuation and Qualifying Accounts
(dollars in thousands)

(a) Write-offs of uncollectible receivables or obsolete inventory

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17

18

19

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SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

     Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed on this 25th day of February, 2005, by the following persons on behalf of the Registrant and in the capacities indicated.

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EXHIBIT INDEX

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23

24

25

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