impact drill

A technology of impact drill bit and drill bit, which is used in earth-moving drilling, drilling equipment, driving device for drilling in wellbore, etc., can solve the problems of intermittent sticking, stick-slip, etc. Effect

Active Publication Date: 2019-10-11
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides an impact drill bit capable of generating rotational torsional impact vibration during the drilling process, so as to overcome the stick-slip, Intermittent pipe sticking

Method used

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Embodiment Construction

[0046] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0047] Embodiments of the present invention provide a percussion drill, see figure 1 and combine image 3 , the impact drill includes:

[0048] The outer cylinder 23 , the drill bit crown 22 fixedly connected to the lower end of the outer cylinder 23 , and the rotating power assembly and the torsional impact assembly arranged inside the outer cylinder 23 in sequence from top to bottom.

[0049] see figure 1 and combine figure 2 , wherein the torsional impact assembly includes: a hollow cylindrical anvil body 17 coaxial with the outer cylinder 23 , a hollow cylindrical hammer body ...

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Abstract

The invention discloses an impact bit, and belongs to the technical field of oil and gas drilling engineering. The impact bit comprises an out cylinder, a bit crown, a rotating power assembly and a torsion impact assembly, wherein the rotating power assembly and the torsion impact assembly are sequentially arranged in the outer cylinder from top to bottom; the torsion impact assembly comprises ananvil block body, a hammer body and a valve body which are arranged from outside to inside in sequence; an annular cavity is formed between the outer wall of the valve body and the inner wall of the hammer body and divided into a high-pressure cavity and a low-pressure cavity; an inner cavity of the valve body communicates with the high-pressure cavity, the inner wall of the anvil block body is provided with a plurality of grooves, and a plurality of working cavities are formed between the multiple grooves and the outer wall of the hammer body; second bulges are arranged on the positions, corresponding to the grooves, of the outer wall of the hammer body in the radial direction of the hammer body correspondingly; the high-pressure cavity communicates with one of the working cavities, and the low-pressure cavity communicates with the other working cavity; and the rotating power assembly provides rotating power for the valve body. When the impact bit works, the high-frequency torsion impact effect can be generated on the bit crown, and the phenomena of stick slip and intermittent drill sticking generated during rock breaking through the bit are avoided.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling engineering, in particular to an impact drill bit capable of generating rotational torsional impact vibration during drilling. Background technique [0002] The drill bit is an important downhole tool in oil and gas drilling engineering. In the oil and gas drilling process, the rock is broken through the cutting and crushing action of the drill bit. [0003] PDC drill bit (Polycrystalline Diamond Compact Bit, polycrystalline diamond compact bit) is widely used in drilling operations due to its high wear resistance and high strength. [0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the existing PDC drill bit can only generate axial impact during operation. This makes the PDC drill bit produce stick-slip effect and intermittent sticking when breaking rocks in medium-hard to hard formations ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/16
Inventor 张松峰武强左惠明谢金祝小林郭一川毛竹
Owner BC P INC CHINA NAT PETROLEUM CORP
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