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3rd Edition, June 1, 2008

Complete Document

Recommended Practices for Operation, Maintenance, Surveillance, and Troubleshooting of Gas-lift Installations

Includes all amendments and changes through Reaffirmation Notice , March 2015

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Product Details:

  • Revision: 3rd Edition, June 1, 2008
  • Published Date: March 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: American Petroleum Institute (API)
  • Page Count: 138
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:


These recommended practices are offered to assist gas-lift system operators, analysts, technicians, engineers, and others in understanding how to effectively plan, operate, maintain, troubleshoot, and provide surveillance of gas-lift systems and gas-lift wells.

This document may be used in a gas-lift training course or as reference material. It can be obtained in booklet form as an API publication, or on CD ROM or cassette in Adobe PDF format.

These recommended practices discuss continuous gas-lift with injection in the casing/tubing annulus and production up the tubing. Annular flow gas-lift (injection down the tubing and production up the annulus), dual gas-lift (two tubing strings in the same casing), and intermittent gas-lift are mentioned; however, most of the discussion focuses on “conventional” continuous gas-lift. Many of the recommended practices in this document may be pertinent to the other forms of gas-lift, but they should be considered and used with caution. Other recommended practices will address dual gas-lift (API 11V9) and intermittent gas-lift (API 11V10).

This document includes:

— Gas-lift Operating System Components and Potential Problems.

Sections 1 through 11 describe the several components of an operating gas-lift system and discuss a number of problems that may be encountered and must be addressed to operate a gas-lift system effectively and efficiently. These sections are new to this edition of the document. A comprehensive checklist of system components is provided and associated problems are discussed. The list can be used when troubleshooting or de-bottlenecking a gas-lift system.

These sections are recommended for use as:

— part of a training course dealing with gas-lift system operation;

— a review before beginning a major gas-lift system study;

— a review before designing and/or modelling a gas-lift system;

— a review before trying to troubleshoot difficult gas-lift system problems.

— Recommended Practices for Gas-lift Operation, Maintenance, Surveillance, and Troubleshooting.

Sections 12 through 17 are revisions/upgrades of information that has been in existence since the first edition of this document. These sections contain recommended practices for common gas-lift operations:

— initial unloading of the completion or workover fluid from the annulus of the gas-lift well;

— re-starting or kick off after a period of downtime;

— adjusting or fine-tuning the gas injection rate for optimum operation.

These sections discuss commonly used gas-lift troubleshooting tools. They conclude with sections that review the potential locations of gas-lift problems, a table of possible causes and cures of some common gas-lift system problems, and a troubleshooting checklist.

These sections are recommended for use as:

— part of a training course dealing with gas-lift system operation;

— part of a training course dealing with gas-lift system maintenance;

— a review before trying to troubleshoot a difficult gas-lift operating problem.