Multipoint mechanical hand for myriametre well drill

Abstract

The invention discloses a multipoint mechanical hand for a myriametre well drill, which comprises an arm, a crossed hand, a hand driving mechanism and an elastic floating friction mechanism. The hand driving mechanism drives the crossed hand to open or close to clamp or release a tubular column, and the elastic floating friction mechanism is arranged on the inner side of the crossed hand. The crossed handle can be crossed to achieve grab of well casings with different pipe diameters, and one well drilling equipment only needs one handle. The elastic floating friction mechanism can automatically and slightly adjust angles to achieve a multipoint and force-equipotent clamping mode, and clamping points are evenly distributed around the well casing, so that too much clamping force is not required, and deformation of the well casing is avoided. An elastic friction sheet of the elastic floating friction mechanism is in a floating mode, so that friction area can be enlarged, the clamping force can be further reduced, and clamping can be reliable and safe.

Description

Technical field [0001] The invention relates to the technical field of drilling rig design, in particular to a multi-point mechanical gripper of a 10,000-meter drilling rig. Background technique [0002] At present, drilling rigs with large depths are all made in foreign countries. They have the following shortcomings: 1. The gripper and the shaft are mostly in line contact, with few contact points, and the contact points are not evenly distributed around the shaft. Large grasping force, once the grasping force is insufficient, the grasping force is likely to be unreliable, and excessive grasping force will cause deformation of the grasped well pipe. 2. One gripper can only grasp well pipes of a certain thickness. Therefore, when the thickness of the used well pipe changes, the corresponding gripper must be changed, which requires a set of equipment to be equipped with multiple grippers. Summary of the invention [0003] The purpose of the present invention is to provide a multi-...

AI Technical Summary

Problems solved by technology

[0002] At present, the large-depth drilling machines are all made by foreign countries, which have the following disadvantages: 1. Most of the gripper and the well rod are in line contact, with few contact points, and the contact points are not evenly distributed around the well rod. Large gripping force, once the gripping force is insufficient, the gripping will be unreliable, and excessive gripping force will lead to deformation of the caught well pipe

2. A gripper can only grip a certain thickness of the well pipe, so when the thickness of the well pipe used changes, it is necessary to change the corresponding gripper, which requires a set of equipment to be equipped with multiple grippers

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