Automatic floating centering hydraulic clamp holder

Abstract

The invention discloses an automatic floating centering hydraulic clamp holder. The automatic floating centering hydraulic clamp holder comprises a clamping assembly used for clamping a drill rod and a base fixedly matched with a drilling machine rack and used for installing the clamping assembly. The clamping assembly is installed on the base in the radial swing direction of the drill rod in a single-degree-of-freedom sliding mode, and a fixing elastic part used for fixing the clamping assembly to avoid the situation that the clamping assembly slides under the gravity effect is arranged between the base and the clamping assembly in the single-degree-of-freedom sliding direction of the clamping assembly; external force floating centering can be increased, so that the situation that abrasion on the drill rod during clamp holder centering is guaranteed through force generated by rotating of the drill rod is avoided; and meanwhile in a lateral orientation drilling machine, the clamp holder can also be centered under the effect of floating external force, so that the eccentric problem of an existing clamp holder under the gravity effect or the problem that the initial position of the clamp holder is repeatedly adjusted to ensure centering in different orientations is avoided.

Description

technical field [0001] The invention relates to the field of drilling tools, in particular to an automatic floating centering hydraulic clamp. Background technique [0002] The gripper is one of the key components in the hydraulic drilling rig. Its structure directly affects the clamping and opening functions of the drill pipe and causes the wear of the drill pipe. The existing grippers are mainly normally closed floating hydraulic grippers, which use disc springs to clamp the drill pipe, and use the floating gap between the gripper seat and the mounting seat to realize the centering of the drill pipe and the gripper. The main defects are In the process of opening and clamping, the floating movement of the drill pipe is realized by using the force on the slips during the rotation of the drill pipe, so as to achieve the purpose of "centering". In fact, it is to ensure that the drill pipe does not continue to contact with the drill pipe after opening. The main performance is ...

AI Technical Summary

Problems solved by technology

The main performance is that the centering of the holder depends on the force applied by the rotation of the drill pipe, which will always cause wear to the drill pipe. Especially in the omnidirectional drilling machine, the holder cannot float under the action of gravity. After the holder is opened , the holder is always in contact with the drill pipe, which increases the wear of the drill pipe

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