Drilling chuck

Abstract

The invention relates to the technical field of drilling tools, in particular to a drilling chuck. The drilling chuck comprises a base, a connecting disc and a valve. Three or more slips bodies are arranged on the inner wall of the base, the connecting disc is fixedly installed at the top of the base, and three or more lifting pressure cylinders are arranged on the base in the circumferential direction; a connecting plate is arranged between the connecting disc and the slips bodies, the outer end of the connecting plate is hinged to the connecting disc, and the inner end of the connecting plate is hinged to the slips bodies; three or more walking pressure cylinders are arranged under the base in the circumferential direction, and walking wheels are fixedly installed on moving parts of the walking pressure cylinders. The drilling chuck is reasonable and compact in structure and convenient to use, and the drilling chuck is placed on the surface of a rotating disc, can adjust the working center of the rotating disc face according to the deflecting condition of a well mouth without limitation of a master bushing and adapts to a rotating disc of any type; the base is supported by the walking wheels under the walking pressure cylinders, and therefore the drilling chuck can be manually moved easily; the drilling chuck has the advantages of being safe, convenient, and efficient and saving labor.

Description

technical field [0001] The invention relates to the technical field of drilling tools, and relates to a drilling chuck. Background technique [0002] In the oil drilling process, in order to replace the drill bit, log the well or run the casing through the well, it is necessary to lift the drilling tool thousands of meters in the well, replace the drill bit, log the well and then run it into the well. During the operation, the driller stands next to the drawworks of the drilling rig, holds the brake handle with one hand, and pushes the clutch switch with the other to control the traveling block to lift and lower the drilling tool. card operation. When drilling, the driller lifts the brake handle, lowers the elevator hanging the drilling tool under the traveling block together with the drilling tool to the wellhead, sits on the turntable, and the two drillers pull out the locking pins on both sides of the elevator and pull out the lifting ring. , push it into the lifting lu...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a drilling chuck, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the labor intensity existing in the use process of the existing elevators Large, square tiles on the turntable are easy to get stuck on the slips, and the drill collar and the slips scratch each other, causing serious accidents and harming human health. It is necessary to prepare slips of various sizes, which is time-consuming and laborious, and the construction efficiency is low, and there are potential safety hazards The problem

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