Multifunctional fixture for drilling rigs

Abstract

The invention relates to a multifunctional fixture for drilling rigs, which comprises a shell, a front end cover, a rear end cover, slips and a hydraulic oil cylinder, wherein the inner wall of the shell is uniformly provided with an oil cylinder embedded slot along the circumference, the hydraulic oil cylinder is embedded in the oil cylinder embedded slot, one end of a piston of the hydraulic oil cylinder is provided with a latch, the slips are composed of slip bodies and slip plates, each slip body is provided with a latch slot, each slip is in clamped connection with the piston through the latch slot of the slip body, the slip plates are arranged on both sides of the slip body, each slip body is at least provided with three slip plates, two adjacent slips are mated through a groove formed between the slip plates, one surface of each slip facing the center of the shell is a clamping surface, and the clamping surfaces of all the slips form a drill pipe clamping cavity. The multifunctional fixture for drilling rigs, disclosed by the invention, solves the problem that the existing rotating fixture matched with drilling rigs can not clamp drill pipes with different shapes and different rotating diameters, thereby fundamentally avoiding the heavy work caused by the replacement of slips and the repair of parts, and effectively improving the operating quality and the operating efficiency.

Description

technical field [0001] The invention relates to the technical field of drilling rig equipment, in particular to a multifunctional clamp for a drilling rig. Background technique [0002] Coal mine tunnel drilling rigs are necessary equipment for coal mining. At present, the existing slip-type coal mine tunnel drilling rig rotary devices at home and abroad can be roughly divided into the following two categories: [0003] One is the "rubber barrel and slip type", that is, during the process of the rotary device holding the drill pipe tightly, the hydraulic oil exerts pressure on the radial direction of the rubber barrel, and the rubber barrel that shrinks under pressure exerts pressure on the slips in the rubber barrel , After compressing the slip spring, the slip holds the drill pipe tightly. During the process of loosening the drill pipe, the hydraulic oil returns and the pressure is relieved. Under the rebound action of the spring, the slips return to the original position...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the deficiencies of the above-mentioned technical problems, to provide a multifunctional clamp for drilling rigs, which solves the problem that the existing clamps matched with the drilling rig cannot clamp drill pipes of different shapes and different rotation diameters, and there are The problem that some parts are easily damaged has realized the effective clamping of drill pipes with different geometric shapes and different rotating diameters by the same fixture

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