Process of testing blow-out preventer without pulling the wear b

Details Process of testing blow-out preventer without pulling the wear b Process of testing blow-out preventer without pulling the wear b

1984-07-18

1985-12-24

Birmiel, Howard A.

Measuring and testing

With fluid pressure

Leakage

73 491, G01M 328

Patent

active

045598096

ABSTRACT:
To avoid the excessive cost and time required to pull the wear bushing from a sub-sea well head in deep water to enable frequent periodic testing of the blow-out preventer, a casing integrity test tool is assembled to a wear bushing running and retrieving tool and this assembly is run into the well until it lands on a seating surface of the wear bushing. A dart for delivering tool energizing pressurized fluid is dropped through the drill pipe and pressurized to a pressure above the pressure being employed to test the blow-out preventer. While maintaining pressure on the drill pipe and dart, the blow-out preventer is tested except for the blind rams. After completion of the testing, pressure is relieved on the drill pipe, the dart is retrieved, and dry string retrieval of the test tool assembly is then carried out.

REFERENCES:
patent: 3165919 (1965-01-01), Loomis
patent: 3420095 (1969-01-01), Brown et al.
patent: 4152924 (1979-05-01), Mayo
patent: 4373380 (1983-02-01), Mayo

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