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SELECTING A SURFACE-CONTROLLED SUBSURFACE SAFETY VALVE FOR DEEP, HOT, HIGH-PRESSURE, SOUR GAS OFFSHORE COMPLETIONS

Keith O. Nystrom, Douglas W. Morris

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Abstract

From a safety aspect, a surface-controlled subsurface safety valve (SCSSV) is installed to perform one function that is, in an emergency, shut in the well to prevent a catastrophic blowout. As such, producers must be assured that the safety valve installed will (1) close, remain locked in position, and seal off pressure in an emergency, and (2) maintain its mechanical reliability in the producing environment. This study discusses design considerations involved in the selection of SCSSV for a 15,000-psi, sour and corrosive offshore gas completion, as well as the results of Exxon's testing program.

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What this paper is about

From a safety aspect, a surface-controlled subsurface safety valve (SCSSV) is installed to perform one function that is, in an emergency, shut in the well to prevent a catastrophic blowout. As such, producers must be assured that the safety valve installed will (1) close, remain locked in position, and seal off pressure in an emergency, and (2) maintain its mechanical reliability in the producing environment. This study discusses design considerations involved in the selection of SCSSV for a 15,000-psi, sour and corrosive offshore gas completion, as well as the results of Exxon's testing program.

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Available abstract

From a safety aspect, a surface-controlled subsurface safety valve (SCSSV) is installed to perform one function that is, in an emergency, shut in the well to prevent a catastrophic blowout. As such, producers must be assured that the safety valve installed will (1) close, remain locked in position, and seal off pressure in an emergency, and (2) maintain its mechanical reliability in the producing environment. This study discusses design considerations involved in the selection of SCSSV for a 15,000-psi, sour and corrosive offshore gas completion, as well as the results of Exxon's testing program.

Key concepts: Safety valve, Submarine pipeline, Sour gas, Relief valve, Seal (emblem), Engineering, Reliability (semiconductor), Marine engineering

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SELECTING A SURFACE-CONTROLLED SUBSURFACE SAFETY VALVE FOR DEEP, HOT, HIGH-PRESSURE, SOUR GAS OFFSHORE COMPLETIONS — Research Paper | ScholarLens