WELLHEAD HIPS WITH AUTOMATIC TESTING AND SELF-DIAGNOSTICS专利检索- .在井口的专利检索查询-专利查询网

WELLHEAD HIPS WITH AUTOMATIC TESTING AND SELF-DIAGNOSTICS
申请号	EP12736989	申请日	2012-01-19	公开(公告)号	EP2666096A4	公开(公告)日	2017-08-02
申请人	SAUDI ARABIAN OIL CO;			发明人	FLANDERS PATRICK S;
摘要	A method for diagnostics of a high integrity protection system (HIPS) for protection of a pipeline downstream of a wellhead includes: monitoring for initiation of an automatic trip or manual safety shutdown or full shut-off test; determining the process safety time (PST) that elapses between the time at which the upstream pressure reached the trip setpoint and the time at which the upstream pressure reaches the maximum allowable piping pressure (MAPP) of the downstream pipeline; and verifying that the safety critical isolation valves stroked to the fully closed position within ½ PST and that the downstream pressure did not exceed the MAPP. If the verification is successful, no action is required, whereas if the verification shows that either of those parameters are not met, then the HIPS signals an alarm to operators, and in the case of a manual safety shutdown or full shut-off test, resets the pressure trip setpoint to a lower level.
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