Hinges for hinge blowout preventer

Abstract

The invention discloses hinges for a hinge blowout preventer. Each hinge is formed by connecting a cuboid section with a cylindrical section, wherein a hydraulic oil opening inlet, a hydraulic oil closing inlet, a first channel communicated with the hydraulic oil opening inlet and a second channel communicated with the hydraulic oil closing inlet are formed in the cuboid section of each hinge; a hinge shaft hole is formed in the center of the cylindrical section of each hinge; the end of each first channel and the end of the corresponding second channel are communicated with the corresponding hinge shaft hole; a lubrication oil through hole is formed in one side of each hinge shaft hole, and the hinge shaft hole and the corresponding lubrication oil through hole penetrate through the upper end surface and the lower end surface of the corresponding cylindrical section; annular grooves communicated with each lubrication oil through hole are formed in the upper end surface and the lower end surface of the corresponding cylindrical section. The hinges have the advantages that the structure is reasonable; machining and mounting are convenient; the opening and closing resistance of the hinges is small, and the hinges cannot rust after being used for a long time; with the adoption of the external lubrication oil channels, operation is convenient, comprehensive lubrication is realized, and opening and closing torque of a side door can be reduced. The hinges are universal, so that difference among oil circuits cannot be caused, a worker can perform mounting operation conveniently, and the mounting time is reduced.

Description

technical field [0001] The invention relates to oil drilling control equipment, in particular to a hinge for a hinged blowout preventer. Background technique [0002] The blowout preventer is an important part of oil drilling control equipment. Its main purpose is to control the wellhead pressure during drilling, workover, oil testing, etc., effectively prevent blowout accidents, and achieve safe construction. At present, the hydraulic ram blowout preventer mechanism used at home and abroad is basically the same, consisting of a shell, an oil cylinder, a piston, a piston rod, a cylinder head, a locking device assembly, and a ram assembly. The connection methods of the side door include bolt type, hinge type and boltless type. Since the ram BOP needs to replace the ram assembly of different sizes or carry out related repairs and maintenance during use, it is necessary to frequently open and close the side door, and the hinge type connection It is widely used due to its low l...

AI Technical Summary

Problems solved by technology

The existing hinged side door connection has the following defects: 1. The friction resistance of the hinge opening and closing is large, and it is easy to rust if it is not used for a long time; 2. The hinge is divided into left and right, and the time is long. Different, increase the installation time; 3. The side door is heavy, and the hinge bears a lot

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