Clamping mechanism for rod changing mechanism of deep sea drilling machine

Abstract

The invention relates to the technical field of deep water drilling auxiliary devices, in particular to a clamping mechanism for a rod changing mechanism of a deep sea drilling machine. The fixing effect on drill pipes is enhanced; better support for the drill pipes can be provided, and the sliding of the drill pipes is decreased; the clamping mechanism includes a bottom plate and four groups of support legs; the clamping mechanism further includes a left driving rod, a right driving rod, a left fixing pin, a right fixing pin, a left lug plate, a right lug plate, a left air cylinder, a right air cylinder and a transverse plate, a lower half area of the right side wall of the left driving rod and a lower half area of the left side wall of the right driving rod are correspondingly provided with a left pressing plate and a right pressing plate, a top central area of the transverse plate is longitudinally provided with communicating holes, and a left part output end of the left air cylinder and a right part output end of the right air cylinder are correspondingly provided with a left expandable rod and a right expandable rod; and the clamping mechanism further includes a left supporting plate, a right supporting plate, a left spring, a left blocking plate, a right blocking plate, a left sliding rod, a right sliding rod, a left clamping plate and a right clamping plate, and the central areas of the left side walls of the left supporting plate and the right supporting plate are correspondingly and transversally provided with a left sliding hole and a right sliding hole.

Description

technical field [0001] The invention relates to the technical field of deep-water drilling attachments, in particular to a clamping mechanism for a rod-changing mechanism of a deep-sea drilling rig. Background technique [0002] As we all know, the clamping mechanism of the rod changing mechanism of deep sea drilling rig is an auxiliary device used for clamping the drill pipe on the rod changing mechanism of deep sea drilling rig, and it has been widely used in the field of deep water drilling; The clamping mechanism of the rod mechanism includes a bottom plate, four sets of legs, a left support plate, a right support plate, a left threaded rod, a right threaded rod, a left pressing plate, a right pressing plate, a left turntable and a right turntable. The left front side, the right front side, the left rear side and the right rear side of the bottom of the bottom plate are connected, a through hole is longitudinally arranged in the central area of ​​the top of the bottom pl...

AI Technical Summary

Problems solved by technology

[0002] As we all know, the clamping mechanism of the rod changing mechanism of deep sea drilling rig is an auxiliary device used for clamping the drill pipe on the rod changing mechanism of deep sea drilling rig, and it has been widely used in the field of deep water drilling; The clamping mechanism of the rod mechanism includes a bottom plate, four sets of legs, a left support plate, a right support plate, a left threaded rod, a right threaded rod, a left pressing plate, a right pressing plate, a left turntable and a right turntable. The left front side, the right front side, the left rear side and the right rear side of the bottom of the bottom plate are connected, a through hole is longitudinally arranged in the central area of ​​the top of the bottom plate, and the bottom ends of the left support plate and the right support plate are respectively connected with the left half area and the right half area of ​​the top of the bottom plate, The central area of ​​the left side wall of the left support plate and the right support plate is respectively provided with a left threaded hole and a right threaded hole horizontally. The left side wall is connected to the central area of ​​the right side wall of the right pressure plate, and the left end of the left threaded rod and the left end of the right threaded rod are respectively connected to the right side wall of the left turntable and the central area of ​​the left side wall of the right turntable; an existing deep-sea drilling rig for changing rods When the clamping mechanism of the mechanism is in use, the staff turns the left and right turntables at the same time, the left and right turntables drive the left threaded rod and the right threaded rod to rotate respectively, and the left and right threaded rods respectively drive the left pressure plate and the right The pressure plate moves relative to each other, and tightens and fixes the drill pipe through the left and right pressure plates; in the use of the clamping mechanism of the rod changing mechanism of the existing deep-sea drilling rig, it is found that the staff manually adjusts the tightening and fixing of the drill pipe, and the tightening is not firm enough, resulting in its The use reliability is poor; due to the long drill pipe, the drill pipe is easy to shake after tightening, resulting in poor use stability

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