API 11V2 : 2001 : R2008

0 INTRODUCTION
1 SCOPE
2 DEFINITIONS AND ABBREVIATIONS
  2.1 Definitions
  2.2 Abbreviations
3 TEST SITE RECOMMENDATIONS
  3.1 Introduction
  3.2 General Description
  3.3 Test Specimen
  3.4 Test Section
  3.5 Throttling Control Valves
  3.6 Pressure Surge Protection
  3.7 Flow Measurement
  3.8 Pressure Taps
  3.9 Pressure Measurement
  3.10 Temperature Taps
  3.11 Temperature Measurement
  3.12 Equalizing Valves
  3.13 Gas Supply
  3.14 Documentation
4 GAS-LIFT VALVE PROBE TEST
  4.1 Introduction
  4.2 Equipment Required
  4.3 Probe Test Procedure
  4.4 Determining Valve Load Rate
  4.5 Determining Maximum Effective Stem Travel
  4.6 Documentation
5 FLOW COEFFICIENT TEST PROCEDURE
  5.1 Introduction
  5.2 Test Specimen
  5.3 Flow Coefficient Tests
  5.4 Data Evaluation
  5.5 Use Of C[v] And X[t] Test Data
  5.6 Documentation
6 GAS-LIFT PERFORMANCE TEST
  6.1 Introduction
  6.2 Flow Performance Test Documentation
  6.3 Preparation For Constant Production Pressure Test (CPPT)
  6.4 Performing The Constant Production Pressure Test
  6.5 Performing Constant Injection Pressure Test (CIPT)
7 RECOMMENDED TESTS TO DEVELOP CORRELATIONS
  7.1 Probe Tests
  7.2 Flow Coefficient Tests
  7.3 Gas-lift Valve Performance Tests
  7.4 Use Of Test Data
APPENDIX A - SIMPLIFIED MODEL
APPENDIX B - TUALP MODEL FOR GAS LIFT VALVE PERFORMANCE
APPENDIX C - METHOD TO ANALYZE PROBE TEST DATA
APPENDIX D - USE OF A RAMP FUNCTION IN THE DYNAMIC
             GAS-LIFT VALVE TEST

Describes the equipment needed for testing valves to determine the following: a) Valve flow coefficients (C[v]); b) Pressure drop ratio factor (X[t]); and c) Gas-lift valve performance curves.