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Rotary impacting device

A technology of impact device and set, which is applied to the drilling driving device, drilling equipment, earthwork drilling and other directions in the wellbore, can solve the problems of unsatisfactory crushing effect and other problems, achieve good rock breaking effect, stable impact force and impact frequency, Constant stroke effect

Pending Publication Date: 2019-04-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a rotary percussion device, which overcomes the shortcomings of the above-mentioned prior art, and can effectively solve the problem of unsatisfactory crushing effect existing in the existing rotary percussion drilling tools using impactors

Method used

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Embodiment Construction

[0021] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0022] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of front, rear, top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the description.

[0023] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0024] as attached figure 1 , 2, 3, the rotary impact device includes an outer cylinder, an upper mandrel 1, a lower mandrel 2, a mandrel anvil 3, an impact generator, an impact drive assembly and an impact execution assembly. It rotates the upper mandrel 1, and the lower...

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PUM

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Abstract

The invention relates to the technical field of down-hole operating equipment, in particular to a rotary impacting device. The rotary impacting device comprises an outer tube, an upper mandrel, a lower mandrel, a mandrel anvil, an impacting generating piece, an impacting driving assembly and an impacting executing assembly; the upper mandrel capable of rotating relative to the outer tube is hung on the inner side of the upper part of the outer tube, and the lower mandrel capable of rotating relative to the outer tube is mounted on the inner side of the lower part of the outer tube in a limitedmode; the mandrel anvil is mounted in a mounting annular groove, the mounting annular groove sleeves the lower part of the upper mandrel, and the lower part of the upper mandrel is located above themandrel anvil; and the lower part of the upper mandrel and the upper part of the lower mandrel are connected together in a transmission mode. Through arrangement of the impacting driving assembly andthe impacting executing assembly, the upper mandrel can periodically move up and down in a reciprocating mode relative to the lower mandrel, thus downward collision acting force can be periodically generated for the mandrel anvil through the impacting generating piece, a downstream drill bit is downwards impacted in a pulsed mode in the drilling process, and the rotary impacting device has a goodrock breaking effect in drilling operation.

Description

technical field [0001] The invention relates to the technical field of downhole operation equipment, and relates to a rotary impact device. Background technique [0002] Conventional drilling mainly uses a rotary table or downhole motor to rotate the drill bit to break the rock at the bottom of the well. This drilling method is called "rotary drilling". However, when drilling encounters hard, broken rock and medium-hard coarse-grained heterogeneous rock formations, there will be problems such as low drilling efficiency of the drill bit and a decrease in the mechanical speed of penetration. At present, the impact rotary drilling technology is a solution to the above problems. An effective method is usually to add an impactor to the upper part of the ordinary rotary drilling tool to transmit continuous, high-frequency impact loads to the drill bit, so that the drill bit can comprehensively break rocks in two ways: impact and rotary cutting. [0003] At present, the rotary per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 李晓军张昕张胜鹏李富强赵继斌王伟罡
Owner BC P INC CHINA NAT PETROLEUM CORP
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