the annular BOP function

1, when there is no drill hole, annular preventer can fully closed wellhead (referred to as a zero).

2, in the drilling, coring, well logging, casing, completion operation from overflow and blowout, can annular space is effectively closed the Kelly, drill pipe, drill pipe, drill collar, the formation of coring tools, pipe, cable, tubing and other tools and wellbore (referred to as the seal ring air).

Butt welded drill pipe 3, the annular BOP is 18 º slope joint in the closed time (control pressure regulating valve in the decompression under), forcibly tripping (also known as non snubbing operation).

[SY/T6426-2005]: in a pressure less than 7MPa case, were not snubbing operation with the annular BOP, should use the 18 º ramp joint drill, drill speed shall not be more than 0.2m/s

Namely: to close the various drill, empty well, when necessary, tripping.

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Drilltech Manufacturing Company is a professional company engaged in R&D, design manufacturing of blowout preventers (BOP), diverters, electromagnetism eddy current brakes and hydraulic disc brakes and Silicon control rectify system(SCR) for offshore and onshore drilling operations.We have provided our products and services applied in offshore platforms,land rigs well testing,well test mining,coal bed methane extraction,shale gas exploitation,to many countries Such As the United States, Norway, Canada, Russia, Iran, Dubai, India, Indonesia, Azerbaijan and others.The quantity of well control systems we supplied specializing in drilling platform has been ranked third in the world.Among our products,49 1/2” diverter for offshore drilling operation is the most remarkable which has been patented with 9 items,Moreover,Drilltech is the second supplier that owns this technology after the GE company in the world.

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