A blowout preventer for sealing the wellhead

Abstract

The invention relates to the technical field of oil exploitation, and discloses a blowout preventer for sealing wellheads, comprising a blowout preventer base, two ends of the blowout preventer base are provided with symmetrical hydraulic cylinders, and one end of the hydraulic cylinder It communicates with No. 1 channel, and the other end of the hydraulic cylinder communicates with No. 2 channel. A hydraulic rod is movably socketed in the hydraulic cylinder, and a central pipeline through which is opened in the center of the blowout preventer base. The present invention uses the designed positioning base, ram, and self-locking ram so that after the ram is closed, it can be lifted up under the pressure impact of the blowout material, so that both sides of the top of the ram are close to the self-locking ram, and the Under the pressure impact of the blowout material, when the positioning base has a force to open to both sides, the ram can transmit the force to the BOP base through the self-locking ram, so that the ram forms a self-locking and prevents the ram from being separated by force situation, and make the blowout preventer get rid of the locking methods of manual locking and electric locking.

Description

Technical field [0001] The present invention relates to the technical field of oil exploration, particularly as a blowout preventer for sealing the wellhead. Background technique [0002] BOP is a process for a job test oil, workover, completion, and the like shut in the well to prevent blowout safety seal, which works by pushing the shutter is moved to the center on both sides by a hydraulic mechanism, using two shutter for sealing or closing the shutter so that the pawl pressing two centers, sucker rods tube sealing. [0003] Conventional blowout preventer is often employed to promote the shutter closed hydraulic sealing manner, in this way an elastic adhesive layer on the shutter repeatedly impacts a hard wear and friction and wear, the amount of forward pushing hydraulic shutter at this time remains constant, this will result in failure of the shutter is closed, and after the blowout preventer conventional shutter is closed, the motor locking or manual locking manner, by turn...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the use of the existing blowout preventer proposed in the background technology, the present invention provides a blowout preventer for sealing the wellhead, which has self-locking force provided by blowout material, self-locking when the ram is lifted, and elastic The wear of the rubber layer can still be closed, the compensation protrusion squeezes the self-locking ram, the self-locking ram is always attached to the ram, and the self-locking force provided by the blowout material is transmitted to the BOP base, which solves the above-mentioned background technology. Propose the technical problems that the wear of the elastic rubber layer leads to the closure failure of the gate, the troublesome operation of the locking device, the slow speed of the locking device, and the waste of power

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