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DEEP SET PRODUCTION TUBING PRESSURE INSENSITIVE WIRELINE RETRIEVABLE SAFETY VALVE
DEEP SET PRODUCTION TUBING PRESSURE INSENSITIVE WIRELINE RETRIEVABLE SAFETY VALVE
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机译:深套生产管道压力敏感型电线可取回安全阀
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摘要
A production tubing pressure insensitive wireline retrievable safety valve includes an upper and a lower packing to create a hydraulic seal in an annulus surrounding a portion of the wireline retrievable safety valve and a hydraulic fluid intake port to receive hydraulic fluid in the annulus surrounding the wireline retrievable safety valve within the hydraulic seal from a surface. The hydraulic fluid is communicated to a piston shoulder chamber disposed below the hydraulic seal to move a power piston under actuation pressure and compress a power spring disposed within a gas chamber. A ball valve connected to the power piston moves a ball off seat when the power piston is forced down allowing fluid communication through a plurality of flow ports into a central lumen of the wireline retrievable safety valve exposed when the ball is off seat.
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