Resources
Evolution Glossary
Clear, practical definitions of the artificial lift terminology, equipment and technical concepts used across the oil and gas industry.
A
Annulus
The annulus is the space between two concentric components in a well, such as between the drillstring and the wellbore, the casing and the wellbore, two casing strings, or the production tubing and casing.
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Anti-Vibration Centralizer (AVC)
A downhole centralizer installed with the tubing string to reduce PCP-generated harmonics and vibration.
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API (American Petroleum Institute)
A U.S. trade association and standards-development organization for the oil and natural gas industry.
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Artificial Lift
A production method that adds external energy to the fluid column in a wellbore when natural reservoir pressure cannot bring fluids to the surface at the desired or economic rate.
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Auto Latch Tubing Hanger
A field-oriented tubing hanger used to pull tension into tubing while setting downhole tools.
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C
CATA (Centralized Advanced Torque Anchor)
Evolution’s centralized torque-anchor design for PCP applications.
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Clamp-On Anti-Vibration System (CAVS)
An Evolution support system that clamps or slides onto a PC pump to increase assembly rigidity and reduce vibration near the pump.
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E
Eccentric Intake
The Evolution Eccentric Intake is a cutting-edge solution designed specifically for horizontal wells where gas flow is present.
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E-Style Tubing Rotator
An Evolution tubing-rotator configuration that replaces the conventional tubing hanger with a rotating hanger.
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F
Flow Path
The route produced fluids follow as they travel through production equipment and into the artificial lift system.
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Flow Ports
Openings within downhole equipment that allow fluids to enter, exit, or circulate through a tool.
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G
Gas Separation
Device or process used to separate free gas from produced liquids before the fluid enters the pump.
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O
Open Sided Pipe Vise
A heavy cast, screw-type shop or field vise designed to hold tubulars and irregular components securely.
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ORCA™ Gas Separator
A continuous-flow downhole gas separator developed by Evolution for PCP systems in high-gas environments.
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P
PCP (Progressive Cavity Pump)
A Progressive Cavity Pump (PCP) is a positive displacement artificial lift system consisting of a helical rotor turning inside an elastomer stator.
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Polish Rod
The smooth surface rod at the top of a rod-pumping installation that passes through the stuffing box and connects the surface drive to the rod string.
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Pup-Joint
A pup-joint is a short length of tubing or casing used to adjust string length and achieve the desired spacing between downhole components during well completion or production operations.
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R
Rod-Grip BOP™
A well-control device that locks and seals around the polish rod so stuffing boxes and drive heads can be serviced safely and efficiently.
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S
Stroke-Set™ Rotating Tubing Anchor Catcher (RTAC)
Evolution’s Stroke-Set™ Rotating Tubing Anchor Catcher (RTAC) is a slimline tension anchor catcher for rod-pumping wells using a tubing rotator.
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Stroke-Set™ Tubing Anchor Catcher (TAC)
Evolution’s Stroke-Set™ Tubing Anchor Catcher (TAC) is a slimline tension anchor catcher for rod-pumping operations.
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Stuffing Box
A wellhead sealing assembly around a moving polish rod.
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T
Torque Anchor
A downhole tool that transfers right-hand torque from a progressing cavity pump tubing string to the casing, helping prevent tubing back-off.
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Tubing
Production tubing is a string of pipe installed inside the well casing that transports produced fluids from the reservoir to the surface.
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Tubing Rotator
A surface device that slowly rotates the production tubing string so rod or pump contact is distributed around the tubing’s inside diameter instead of wearing one location.
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Tubing Swivel
A downhole tool used with a tubing rotator when the pump and tubing string also require an anchor.
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