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Electric Compression Application at the Wellhead

Bill Elmer, P.E.Engineering AdvisorEOG Resources, Inc.

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Compression Application at the Wellhead

Gas Sales:25 to 1000 HP

Gaslift:75 to 250 HP

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Gas Engines Predominant – Electric Driven Compressors a RarityWhy?Fuel Gas Readily Available- Makes for quick startup- Little time to plan power lines

Rental compression with engine only fleets utilized by most all E&P Companies despite disadvantages of:- Air Permitting- Emission Control Testing- Emission Equipment Maintenance- Noise

Most E&P Companies lack engineering staff to tackle electric infrastructure issues

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Typical Electric Driven Compressor Installations- Usually done when infrastructure construction is minimal (lower cost and quicker timing)

- Older compressors converted from gas engine drive very common

- Rental companies usually require long term rental contracts that essentially buy the compressor

- Rental fees not lowered commensurate with the lowered package cost (motors far cheaper than engines)

-Rental fees not lowered commensurate with the lower maintenance costs

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What is changing to make electric driven compressors more common?

Technology:• Variable Frequency Drives more cost effective

• No inrush current allows existing electric infrastructure to support load

• Speed control capabilities allow far greater turndown than turbo-charged engines allow (50% vs 25%)

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What is changing to make electric driven compressors more common?

Regulations:• Noise levels with engines often require expensive sound walls or buildings to mitigate. Electric compressors are quieter.

• Air regulations require new engines to meet low emission standards even at low horsepower, elevating their cost and decreasing their reliability

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What is changing to make electric driven compressors more common?

Availability:• Some rental companies willing to build electric driven packages with short term (1 year) contracts

• New products being offered to serve the wellhead, such as the new Cameron Ajax C-202

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What is changing to make electric driven compressors more common?

Electrical Infrastructure Assistance:

• Marketers of electric power see untapped market potential

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Cameron Ajax C-202 Compressor Two Throw Separable 250 HP

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Cameron Ajax C-202 Compressor Quiet cooler with independent VFD controlled fan motors

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Cameron Ajax C-202 Compressor Conventional 1185 RPM electric motor operates compressor at 440 RPM

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Cameron Ajax C-202 Compressor Proven Ajax long stroke 11” stroke cylinders provide efficiency and loading versatility

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Cameron Ajax C-202 Compressor Walkaround Video

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Cameron Ajax C-202 Compressor Horizontal opposed cylinder design provides smooth operation

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Electric Compression Application at the Wellhead

• Thanks to EOG Resources for supporting this project and presentation.

• Thanks to Cameron and Tristar, who worked together to make are really nice product for industry.

Electric Compression Application at the WellheadCompression Application at the WellheadGas Engines Predominant �– Electric Driven Compressors a RarityTypical Electric Driven Compressor InstallationsWhat is changing to make electric driven compressors more common?What is changing to make electric driven compressors more common?What is changing to make electric driven compressors more common?What is changing to make electric driven compressors more common?Cameron Ajax C-202 Compressor�Two Throw Separable 250 HPCameron Ajax C-202 Compressor�Quiet cooler with independent VFD controlled fan motorsCameron Ajax C-202 Compressor�Conventional 1185 RPM electric motor operates compressor at 440 RPMCameron Ajax C-202 Compressor�Proven Ajax long stroke 11” stroke cylinders provide efficiency and loading versatilityCameron Ajax C-202 Compressor�Walkaround VideoCameron Ajax C-202 Compressor�Horizontal opposed cylinder design provides smooth operationElectric Compression Application at the Wellhead