Drill String Safety Valves (DSSV's) are considered as part of the essential well control equipment on every rig but they are currently only addressed in a very limited fashion in industry specifications. Performance problems with DSSV's in stripping operations motivated Mobil to lead an industry effort to develop appropriate functional specifications for consideration by API and to conduct performance testing to establish that new generation valves could be built to meet the proposed new specifications. Results from testing three new generation valves indicate that common DSSV performance problems can be addressed and the proposed new specifications are workable.
New generation drill string safety valves
1998
12 Seiten, 4 Quellen
Conference paper
English
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