Measuring and testing – Borehole or drilling – Downhole test
Patent
1976-02-27
1977-06-21
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
E21B 4710
Patent
active
040303543
ABSTRACT:
The test sub is attached to the drill pipe by screw type connections. The bottom connection of the test sub is screwed into a telescoping joint (variable length joint of drill pipe) or a pup joint (short joint of drill pipe). The telescoping joint or pup joint is then screwed into a test plug. This assembly is lowered into the control hookup until the test plug seats in the wellhead. The test plug seats and forms a pressure seal in the wellhead. The length of the telescoping joint and/or pup joint is such that the distance between the top of the test sub and the bottom of the test plug is the same as the distance between the top of the annular preventer and the center of the wellhead.
The casing rams are closed around the test sub and test fluid is pumped through this assembly through the test plug and between the sub and the control hookup. Pressure is applied to the casing rams and control hookup through the test fluid. The process is the same when testing the annular preventer. In the latter test, the casing rams are in the open position with the bag of the annular preventer closed around the test sub.
REFERENCES:
patent: 3177703 (1965-04-01), Waters et al.
patent: 3443643 (1969-05-01), Jones
patent: 3872713 (1975-03-01), Ilfrey et al.
LandOfFree
Testing of ram and annular blowout preventers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Testing of ram and annular blowout preventers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing of ram and annular blowout preventers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-729106