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Torsional impact drilling device

A technology of percussion drilling and percussion parts, which is applied to the driving device for drilling in the borehole, drilling equipment, earthwork drilling and production, etc. It can solve the problems of many wearing parts and complex internal structure of the torsional impact generator, and reduce the vulnerability parts, overcome the stick-slip phenomenon, and improve the effect of ROP

Active Publication Date: 2015-12-30
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the impact hammer, the screw motor composed of the screw motor stator and the screw motor rotor, and the connecting assembly used to connect the screw motor and the impact hammer need to be arranged in the housing to form the torsional impact generator, the torsional impact occurs. The internal structure of the device is complex and there are many wearing parts

Method used

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] In the embodiment of the present invention, the torsional percussion drilling device includes a drill bit and a high-frequency torsional percussion mechanism 12 connected with the drill bit. In one embodiment, such as figure 1 As shown, the high-frequency torsional impact mechanism 12 mainly includes three parts: the upper joint 1 , the outer cylinder 2 and the anvil 10 . The upper end of the upper sub 1 is threadedly connected to the drill string, and the lower end thereof is fixedly connected with the inner thread of the upper end of the outer cylinder 2 through an external thread. In addition, the lower end of the anvil 10 is provided with an internal thread for a drill bit. In a preferred embodiment, the lower end of the outer cylinder 2 and the outer peripheral portion of the lower end of the anvil 10 are provided with interfittin...

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PUM

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Abstract

The invention discloses a torsional impact drilling device which comprises a drill bit and a high-frequency torsional impact mechanism. The high-frequency torsional impact mechanism is connected with the drill bit and used for providing impact torque for the drill bit to break a rock stratum. The high-frequency torsional impact mechanism internally comprises a jet flow reversing element and a rotary impact part. The hydraulic energy of fluid entering the high-frequency torsional impact mechanism can be converted into reciprocating circumferential high-frequency low-amplitude rotating impact of the rotary impact part after passing through the jet flow reversing element to act on the drill bit. The device is smaller in structure and is provided with a smaller number of quick-wear parts, so that the mechanical drilling speed is better improved, and the service life of the drill bit is better prolonged.

Description

technical field [0001] The invention relates to the technical field of drilling construction, in particular to a torsional percussion drilling device for drilling through rotary shearing. The torsional percussion drilling device can be especially used for drilling underground construction in fields such as oil drilling, geological exploration, hydrological water wells and geothermal. . Background technique [0002] When using a PDC bit (polycrystalline diamond compact bit) to drill some difficult-to-drill formations (such as hard formations with high drilling resistance) during oil drilling, the PDC bit often does not get enough torque to break the formation, resulting in the bit being damaged in a short time. Stop spinning. At the same time, the drill string continues to rotate under the drive of the wellhead rotary table and begins to coil, storing torsional energy along the length of the drill string. Once the torque value required to break the formation is reached, the...

Claims

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Application Information

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IPC IPC(8): E21B4/14
Inventor 王甲昌牛新明陶兴华孙明光张仁龙张海平索忠伟马东军
Owner CHINA PETROLEUM & CHEM CORP
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