Wellhead rotary reversing blowout prevention integrated device

Abstract

The invention discloses a rotary reversing and blowout prevention integrated device for a wellhead. The rotary reversing and blowout prevention integrated device comprises a wellhead rotary sealing and reversing mechanism and a wellhead blowout preventer positioned below the wellhead rotary sealing and reversing mechanism, wherein a rotary supporting mechanism is arranged at the top of the wellhead blowout preventer; a section of drill pipe arranged in the vertical direction is fixedly connected with the bottom of the wellhead rotary sealing and reversing mechanism, and the rotary supporting mechanism is rotatably connected with the bottom of the wellhead rotary sealing and reversing mechanism; the drill pipe extends into the rotary supporting mechanism and the wellhead blowout preventer,a clapboard divides the insides of the wellhead rotary sealing and reversing mechanism and the drill pipe into a drilling fluid input channel and a drilling fluid output channel, and the clapboard isarranged in the wellhead rotary sealing and reversing mechanism and the drill pipe. The rotary reversing and blowout prevention integrated device can prevent drilling liquid from being in large-area contact with a stratum to cause leakage and pollute the stratum, the wellhead rotary sealing and reversing mechanism with fluid inlet and fluid outlet rotating by 180 degrees at intervals during the rotation of the drill pipe is specially designed, the wellhead rotary sealing and reversing mechanism is integrally arranged with the wellhead blowout preventer, so that the structure is more compact, the functions are more diversified, and the window density of drilling fluid is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well exploitation, and in particular relates to an integrated device for well head rotation, reversing and blowout prevention. Background technique [0002] At present, the wellhead rotary steerer used in the drilling process of the petroleum industry can only allow the drilling fluid to enter from the inside of the drill pipe and be discharged from the annular gap between the outer wall of the drill pipe and the inner wall of the drilling well. For high-permeability formations, this will affect drilling. The window density of the fluid will allow the drilling fluid to enter the formation, resulting in filter loss and pollution. In addition, the existing wellhead blowout preventer is also installed separately, and the structure of the wellhead blowout preventer is relatively complicated. For the drilling process of such high-permeability formations, in order to realize the entry and exit of t...

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Problems solved by technology

[0002] At present, the wellhead rotary steerer used in the drilling process of the petroleum industry can only allow the drilling fluid to enter from the inside of the drill pipe and be discharged from the annular gap between the outer wall of the drill pipe and the inner wall of the drilling well. For high-permeability formations, this will affect drilling. The window density of the fluid will allow the drilling fluid to enter the formation, resulting in filter loss and pollution

In addition, the existing wellhead blowout preventer is also set separately, and the structure of the wellhead blowout preventer is relatively complicated.

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