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Novel unscrewing tong for drill stem

A new type of drill pipe technology, which is applied in the direction of wrench, wrench, manufacturing tools, etc., can solve the problems of bulky manual working tongs and poor unscrewing effect, and achieve the effect of light portability, wide application range, and adjustable diameter

Inactive Publication Date: 2017-03-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the current manual working tongs such as pipe tongs and chain tongs used in geological drilling are bulky and have poor unscrewing effects. There is an urgent need for a light, easy-to-use pipe tong that can adapt to a certain caliber (￠50-￠130mm)

Method used

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  • Novel unscrewing tong for drill stem
  • Novel unscrewing tong for drill stem

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Embodiment Construction

[0020] Below in conjunction with embodiment and its Figure 1-2 The present invention is described in further detail. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0021] Such as Figure 1-2 as shown, figure 1 It is the structural representation of the novel unscrewing pliers for drill pipe of the present invention, figure 2 for figure 1 top view.

[0022] A new type of unscrewing pliers for drill rods, including a movable jaw 1 and a fixed jaw 2; the inner jaw of the movable jaw 1 includes a planar occlusal end surface 3 and an arc-shaped concave clamping inner surface 4, the The angle between the plane where the opening of the clamping inner surface 4 is located (that is, the plane where the line between the two opening ends of the arc-shaped concave surface is located) and the occlusal end surface 3 is 65° to 80°, and the movable jaw 1 The rear end is hinged on the fixed jaw 2; the fixed...

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Abstract

The invention discloses a novel unscrewing tong for a drill stem. The novel unscrewing tong comprises a movable jaw and a fixed jaw. An inner jaw part of the movable jaw comprises an engagement end face designed into a plane and an inner clamping face designed into an arc-shaped concave surface. The plane where an opening of the inner clamping face is located forms an included angle being 65-80 degrees with the engagement end face. The rear end of the movable jaw is hinged to the fixed jaw. The fixed jaw comprises a tong head and tong arms on the two sides. The tong head is fixedly clamped between the two tong arms. The rear end of the movable jaw is hinged between the two tong arms through a pin shaft. A mounting block is arranged between the two tong arms. A spring piece is fixedly mounted on the mounting block. The rear end of the movable jaw is provided with an arc-shaped convex surface. When the movable jaw rotates around the pin shaft, the arc-shaped convex surface at the rear end of the movably jaw makes contact with the spring piece to bend or unfold the spring piece. The novel unscrewing tong for the drill stem is wide in application range and high in operability and is expected to completely replace traditional chain tongs and pipe tongs in the near future.

Description

technical field [0001] The invention relates to a rod unscrewing device, in particular to a rod unscrewing pliers. Background technique [0002] In the prior art, a wrench is a very versatile installation and removal tool. Its principle is to use the principle of leverage to turn bolts, screws, nuts and other threaded fastening bolts or socket fasteners. The wrench is usually made with clamping jaws at one or both ends of the handle. When in use, an external force is applied to the handle along the thread rotation direction to twist the bolt or nut. [0003] According to whether the jaws can move, wrenches can be divided into dead wrenches and live wrenches. An adjustable wrench, also known as a network wrench, is a tool for tightening or loosening angled screws or nuts. Commonly used are 200mm, 250mm and 300mm, which should be selected according to the size of the nut when used. Dead wrenches mainly include Allen wrench (Inner hexagon), Phillips screwdriver (Phillips sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B13/50
CPCB25B13/5041
Inventor 马丁王瑜李雪峰呼和满都拉
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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