Cooper Acquires Tucker Valve Seat Company

Houston, TX, Feb. 5, 2024 – ( – Cooper Machinery Services (“Cooper”) today announced the acquisition of Tucker Valve Seat Company. This action advances Cooper’s position as the leading manufacturer and service provider of mission-critical compression and engine systems.

Founded in 1957 and based in Odessa, Texas, Tucker Valve Seat Company is a manufacturer of superior industrial alloy valve seats for critical applications such as LP, gas, diesel, natural gas, and unleaded fuels. “We are excited to become a member of the Cooper family.”, said Phillip Carrasco, Tucker Valve Seat Company’s leader. “Together, we will strengthen Tucker’s commercial efforts and improve customer relationships. 

The Tucker Valve Seat Company is a great addition to the Cooper organization. Like Cooper, Tucker is a mainstay in our industry having served our customer base for nearly 70 years. Tucker’s strategy is based on high quality products and strong customer service, so they fit perfectly with the Cooper culture.”, said Cooper CEO, Scott Buckhout.

Cooper Machinery Services
Jeremy Holberg

Cooper Acquires Terrecorp, Inc.

Houston, TX, Nov 1, 2023 –(– Cooper Machinery Services (“Cooper”) today announced the acquisition of Terrecorp, Inc.(“Terrecorp”).  This action advances Cooper’s position as the leading manufacturer and service provider of mission-critical compression and engine systems.

Founded in 1998 and based in Indianapolis, Indiana, Terrecorp is a manufacturer of aluminum, bronze, and steel-backed bearing shells and bushings for a large variety of reciprocating engine brands such as Ajax, Clark, Cooper-Bessemer, Ingersol Rand, and Worthington.

“We are excited to add Terrecorp to the Cooper family.  Terrecorp’s quality products, robust manufacturing processes, and short lead times are highly regarded in the compression market.  This acquisition further expands the products and services we can directly offer our customers”, said Cooper CEO, Scott Buckhout.

Cooper Machinery Services
Matt Forcey

David Tomes Named Vice President of Used & Refurbished Equipment

Cooper is pleased to announce the appointment of David Tomes as Vice President of Used & Refurbished Equipment.

David is a 40+ year gas compression guru who began his career in the industry as a Cooper mechanic in 1980 working globally on reciprocating engines-compressors. In 1996, he moved to NRG Energy where he managed their United States operation. Since 2010, David has owned his own compression business specializing in AJAX, Clark, Cooper-Bessemer, Ingersoll Rand, Waukesha, and Worthington models. Today, David leads Cooper’s used and refurbished parts and equipment business located in Odessa, Texas.

Nina Teirelbar Named Chief Human Resources Officer

Cooper is pleased to announce the appointment of Nina Teirelbar as Chief Human Resources Officer.

Nina is a 20+ year human resources leader with global experience developing human capital, scaling teams, and driving global talent development and HR strategy for Fortune 500 companies and small businesses. Most recently, she served as vice president of global human resources at Fortive within Precision Technology which supplies essential technology solutions to a plethora of industries. 

Nina holds a bachelor’s degree in art studies from Algiers University, a master’s degree in accounting and finance from HEC Alger, and an MBA from Texas A&M University.

Good Neighbor Update

Don’t miss Cooper’s latest release in Gas Compression Magazine and Compressor Tech2 addressing the Good Neighbor Rule and Cooper’s positioning to support customers with a powerhouse of service personnel, substantial inventory, and state-of-the-art CleanBurn PlusTM technology.

Contact a Cooper sales representative today to discuss cost-effective emissions reduction solutions to help your Cooper-Bessemer®, Clark, Ingersoll Rand, Superior®, and Worthington engines achieve compliance. 

Cooper’s CEO Featured in Gas Compression Magazine

Scott Buckhout gave his first interview as Cooper’s CEO in the April issue of Gas Compression Magazine. 

In the article, Buckhout addresses industry challenges and opportunities, market indicators, environmental initiatives, and Cooper’s future.

Click one of the links below to read more. 

The Good Neighbor Rule is Here

On March 15, 2023, the U.S. Environmental Protection Agency (EPA) released the Good Neighbor Rule which requires upwind states to reduce emissions of the ozone precursor NOx from electric generating units (EGUs) and certain stationary industrial sources, in accordance with the EPA’s 2015 ozone National Ambient Air Quality Standards (NAAQS).

The rule requires a large portion of the reciprocating compression fleet in the United States above 1,000 hp to operate at no more than 3g/bhp-hr NOx for 2-stroke cycle lean burn engines, 1.5g/bhp-hr for 4-stroke cycle lean burn engines, and 1g.bhp-hr for 4-stroke cycle rich burn engines by mid-2026. Click here to view the states affected by the Good Neighbor Rule.

Cooper understands that requirements associated with the Good Neighbor Rule, particularly the horsepower limit and narrow implementation window, have come as a surprise to many in the industry, and that there is great concern around the cost and speed at which these engines can be upgraded.

Good Neighbor Engines

Cooper Stands Ready for Good Neighbor

In preparation for Good Neighbor, Cooper has invested millions of dollars in expanding our operations and perfecting our CleanBurn™ technology, which has reduced emissions in the industry for decades. As a result of these efforts, Cooper has the parts, manpower, and technology available to help you achieve compliance with Good Neighbor in a cost-effective manner.

Cooper’s standard CleanBurn™ kits will take 2-cycle lean-burn engines down to the required 3g/bhp-hr NOx and a 4-cycle lean-burn engine down to 1.5g/bhp-hr NOx. Cooper’s CleanBurn Plus™ technology achieves 0.5g/bhp-hr NOx on both 2-cycle and 4-cycle engines.

Our goal is to keep the industry’s Cooper-Bessemer°, Clark, Ingersoll Rand, and Worthington engines running long into the future.

Legends Don’t Stop. We Make Sure of It.

Cooper & Southern Star Central Gas Pipeline, Inc. Achieve Hydrogen Breakthrough

Houston, TX, October 17, 2022  (PR.COM) -Southern Star Central Gas Pipeline, Inc. (Southern Star), a U.S.-based interstate natural gas pipeline company and Cooper Machinery Services (Cooper) are pleased to announce they have successfully field tested a large bore slow-speed integral engine running on a 30% hydrogen (H2) fuel blend.

In late 2021, the two companies signed a memorandum of understanding (MOU) to launch a joint hydrogen research project aimed at converting Southern Star’s fleet of gas fired reciprocating integral engines to combination gas-hydrogen fired units. The two companies modified a large bore Cooper-Bessemer GMVH-12 at Southern Star’s Hugoton, Kansas compressor station to run on a blend of hydrogen and natural gas. The engine was equipped with Cooper’s HyperBalance IV™ system to monitor pressures, collect data, and ensure equipment safety during the test. This month, the unit ran in the field for the first time with the hydrogen fuel blend.

“This is a remarkable time for Cooper and our hydrogen development program. In September, we announced a major hydrogen breakthrough when we ran an AJAX integral engine on a mix of 30% hydrogen at our company test cell in Houston, Texas.” Said Cooper CEO John Sargent. “The Southern Star test proves unequivocally that similar results can be achieved in the field and with a variety of engine models. When combined with Cooper’s combustion enhancement technology, the industry’s big bore engines are capable of impressive greenhouse gas reductions with additional improvements in reliability and efficiency. This is another large step towards greater adoption of hydrogen across the industry.”

“Southern Star is proud to be the first natural gas transmission company in the United States to achieve a 30% hydrogen blend in the recent testing of our reciprocating engine in Hugoton, Kansas. Our partnership with Cooper has been instrumental in the success this project,” said Shawn Patterson, Southern Star President & CEO. “This testing presents emission reduction opportunities on our road to being net zero by 2050.”

About Southern Star Central Gas Pipeline, Inc.: Southern Star is a leading transporter of natural gas to America’s heartland, with approximately 5,800 miles of natural gas transmission pipeline in the Midwest and Mid-Continent regions of the United States. Our pipeline system, facilities and employees are located in Missouri, Kansas, Oklahoma, Wyoming, Colorado, Nebraska and Texas, with our headquarters in Owensboro, KY.

About Cooper Machinery Services: Cooper Machinery Services (Cooper) is the original equipment manufacturer (O.E.M.) and supplier of parts and after-sale services, and emissions reduction technologies to a large installed base of highly respected engine-compressor brands. The company’s O.E.M. brands include AJAX, Cooper-Bessemer, CSI, Enterprise, Gemini, Superior, TSI, and TXC. They also are a major supplier of after-sale support for non-Cooper engine-compressor brands such as Clark, CAT (3600 engines), IR, Waukesha (VHP engines), and Worthington. Manufacturing is conducted in its facilities in Houston, Texas, Deer Park, Texas, Salina, Kansas and McPherson, Kansas, while on-site services are delivered through its extensive network of field technicians operating out of fully equipped repair and overhaul shops strategically located around the world.

Cooper Machinery Services
Matt Forcey

Southern Star Central Gas Pipeline, Inc.
Karen Goedde

Cooper to Modify a Cooper-Bessemer GMWA-8 in Brazoria County

Houston, TX, October 12, 2022  ( – Cooper continues to make headway in our industry’s emissions reduction efforts. Helping customers reduce emissions and increase horsepower on existing equipment is what we do, and this time it is right here at home in Brazoria County, Texas.

A customer in Brazoria County contacted Cooper Machinery Services to modify and uprate an existing reciprocating compressor unit from 2000 to 2700 hp (1492 to 2014 kW) at its Compressor Station 4 in Matagorda County, Texas, as part of its Brazoria County project. The purpose of the project is to enable deliver up to 68,000 million Btu/d of new firm transportation service.

Modifications to Compressor Station 4 involves converting the Cooper-Bessemer compressor from a Model GMWA-8 configuration to a Model GMWH-8C configuration, which will improve unit efficiency, power output, and reduce NOx emissions.

Cooper Awarded Enterprise R-3 Engine-Generator Project by the United States Space Force

Houston, TX, September 12, 2022  (PR.Com) – Cooper Machinery Services (Cooper), LLC, a portfolio company of Arcline Investment Management, has been awarded a contract by the United States Space Force (U.S.S.F.) to overhaul two of the six backup Enterprise R3 engine-generator sets stationed inside the Cheyenne Mountain Space Force Station in Colorado.

The Cheyenne Mountain Space Force Station supports U.S. Space Command’s Missile Warning Center and strategic warning/survivable capabilities while providing a ready alternative operating location for NORAD’s command center. Six Cooper Enterprise R3 diesel engines (Rated 1,750KW HP) drive generators that serve as power backup for the mountain’s critical functions.

“The U.S. military has turned to Cooper Machinery Services for over eighty years to provide quality diesel engines, parts, repairs, and service solutions for marine propulsion and stationary power generation. In those eight decades, this is one of the most mission-critical projects Cooper has ever executed, and we are truly honored to have been chosen by the U.S.S.F.,” said Cooper CEO, John Sargent. “Whether they are aware of it or not, every American owes a debt of gratitude to the Space Force for the functions performed at the Cheyenne Mountain Station. Cooper knows this and will go above and beyond the call of duty to provide the U.S.S.F. the very best products and services we can deliver.”

The overhaul project will run through 2023. An engineering study and the overhaul and upgrade of the remaining engines is slated to commence in 2023 and 2024.

Cooper Machinery Services
Matt Forcey