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High-Reliability Gas Lift Flow-Control-Device Technology and Erosion/Endurance Tests

Topics: Artificial lift

High-reliability gas lift flow-control devices (GLFCDs) enable gas lift for wells with the potential for H2S in the produced gas and where casing is not qualified for H2S service. Valve specifications are such that no leakage is allowed at both high (8,000-psi) and low (1-psi) differential pressures across the valve. A series of tests was designed using the environmental-stress-screen (ESS) concept and a harsh test standard that greatly exceeds API specifications for GLFCDs.

Introduction

GLFCDs are usually incorporated into the production conduit and used to inject high-pressure natural gas from the injection conduit to the interior of the production conduit. Commercially available GLFCDs typically contain one-way check systems comprising a ball, hemisphere, or cone, which is pressed against a valve-seating ring by a spring. Unfortunately, many GLFCDs are prone to wear and damage because of fluid cut during the operation.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 159848, “High-Reliability Gas Lift Flow-Control-Device Technology and Erosion/Endurance Tests,” by Jun Xu, Stuart L. Scott, SPE, and Wayne Mabry, SPE, Shell E&P, and Jose Gamboa, SPE, The University of Tulsa, prepared for the 2012 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 8–10 October. The paper has not been peer reviewed.
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High-Reliability Gas Lift Flow-Control-Device Technology and Erosion/Endurance Tests

01 July 2013

Volume: 65 | Issue: 7

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