A general-purpose oilfield wellhead annular blowout preventer
An annular blowout preventer, a general-purpose technology, applied in wellbore/well components, sealing/packaging, earth-moving drilling, etc., can solve the problems of poor sealing effect of rubber core, wear of rubber core, etc. Long service life and easy-to-use effects
Active Publication Date: 2020-10-16
扬州市油田金达实业有限公司
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Problems solved by technology
[0005] Aiming at the deficiencies of the prior art, the present invention provides a general-purpose oil field wellhead annular blowout preventer, which solves the problems of poor sealing effect of the rubber core and serious wear of the rubber core when it is forcibly removed
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[0028] Such as Figure 1-5 As shown, the embodiment of the present invention provides a general-purpose oilfield wellhead annular blowout preventer, which includes a casing 1, a stopper 19 is arranged in the middle of the casing 1, and a stopper 19 is arranged on the upper part between the stopper 19 and the side wall of the casing 1. There is a first cavity 25, a first push block 20 is slidably connected in the first cavity 25 and the upper end of the first push block 20 extends upward through the first cavity 25, between the stopper 19 and the side wall of the housing 1 The lower part of the housing is provided with a second cavity 28, the second cavity 28 is slidably connected with a second push block 21 and the bottom end of the second push block 21 extends downward through the second cavity 28, and the bottom of the housing 1 A spherical rubber core 18 is provided below the second push block 21, a cover body 2 is provided on the top of the housing 1, and a conical rubber ...
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The invention provides a universal oil field wellhead annular blowout preventer, and relates to the technical field of oil field exploitation equipment. The universal oil field wellhead annular blowout preventer comprises a shell body, wherein a spherical rubber core is arranged at the position, below a second pushing block, of the inner bottom of the shell body, a conical rubber core is arrangedat the position, above a first pushing block, of the inner bottom of a cover body, oil outlets are evenly distributed in the inner side of a first connecting groove, the first connecting groove communicates with the inner side of the cover body through the oil outlets, and the other end of a liquid conveying pipe is fixedly connected to the output end of an oil pump. Sealing operation can be carried out simultaneously through the conical rubber core and the spherical rubber core, the sealing effect is better, the structure is compact, the use is more convenient, a drilling fluid can be conveyed into the first connecting groove and sprayed to a pipe column through the oil pump, the lubricating effect is achieved, the abrasion to the conical rubber core and the spherical rubber core when thepipe column is forcibly lifted and lowered is greatly reduced, and the universal oil field wellhead annular blowout preventer is worthy of being energetically popularized.
Description
technical field [0001] The invention relates to the technical field of oilfield exploitation equipment, in particular to a general-purpose oilfield wellhead annular blowout preventer. Background technique [0002] The annular blowout preventer is usually equipped with a large gate of the ram type blowout preventer. During operation, a sealed annular space will be formed between the pipe string and the wellbore. It can also complete the well sealing alone without the pipe string in the well, but It will not work after several times of use, and it is not allowed to shut down the well for a long time. [0003] The annular blowout preventer is equipped with a rubber core, which can close the annular space between the pipe string and the wellhead when there is a pipe string in the well, or completely seal the wellhead when the well is empty, but the sealing effect of one rubber core is poor, and the annular space When the blowout preventer is in use, it is often necessary to for...
Claims
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IPC IPC(8): E21B33/06
CPCE21B33/061
Inventor 王海洋
Owner 扬州市油田金达实业有限公司