Drilling tool for breaking rocks by producing compound action through rotary-percussion mode

A compound action and drilling tool technology, which is applied in earthwork drilling, drilling equipment, driving devices for drilling in boreholes, etc., can solve problems such as unfavorable cementing, well completion, unfavorable borehole quality, and slowdown of drilling speed. It achieves the effects of optimizing wellbore conditions, high rock breaking efficiency and increasing service life

Inactive Publication Date: 2016-03-23
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
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Problems solved by technology

When the drill bit encounters hard formations or alternating soft and hard formations during the drilling process, problems such as stick-slip and broken teeth often occur, which not only

Method used

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  • Drilling tool for breaking rocks by producing compound action through rotary-percussion mode
  • Drilling tool for breaking rocks by producing compound action through rotary-percussion mode
  • Drilling tool for breaking rocks by producing compound action through rotary-percussion mode

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing:

[0022] see figure 1 , A drilling tool that uses the rotary punching method to generate composite rock breaking. The drilling tool is installed on the upper part of the drill bit, and the impact force of the rotary punching method is applied to the drill bit. The new drilling tool includes a power end, an impact shaft assembly and a lower tool assembly. The power end is the upper casing 1, the turbine rotor 4, the turbine stator 5, the upper shaft 6 thrust ball bearing group 10, etc. The turbine rotor 4 and the blades of the turbine stator 5 are installed in reverse, and the stud bolts 2 and hexagonal locks are used to prevent loosening. The nut 3 fixes the turbine stator 5 on the upper shaft 6, connects the upper casing 1 and the middle casing 8 with threads, and installs an O-ring 7 to seal the gap between the upper casing 1 and the middle casing 8. A thrust ball bearing...

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Abstract

The invention relates to a drilling tool for breaking rocks by producing the compound action through a rotary-percussion mode. The drilling tool is fixedly installed on the upper portion of a drill bit and comprises a power end, a percussion shaft assembly and a lower tool assembly; the rear end of the percussion shaft is connected with the power end, and the front end of the percussion shaft is connected with the lower tool assembly; the power end enables a turbine to work under the slurry pressure and drives an upper shaft to rotate, the turning moment and the torque are transmitted to the percussion shaft through a square active connection, the percussion shaft impacts an anvil, and the impact force of the rotary-percussion mode action is applied to the drill bit. The mode of action of the novel drilling tool is the percussion action mode, the up and down reciprocating action of the percussion shaft is achieved by means of interaction of cam mechanisms, the novel drilling tool breaks the rocks in an oscillation and shearing mode, the contact time with the bottom layer can be shortened, the wearing degree of the drill bit can be reduced, the service life of the drill bit is prolonged, and meanwhile the borehole quality can be optimized.

Description

technical field [0001] The invention belongs to a rotary rock-breaking tool in the field of petroleum and natural gas drilling engineering, in particular to a drilling tool for rock-breaking by means of a composite effect produced by a rotary punching method. Background technique [0002] The new type of drilling tool with the function of rotary punching can apply an axial or circumferential impact force to the drill bit at the same time of rotating drilling to improve the rock breaking effect, and can be effectively applied to deep wells, ultra-deep wells and hard formations. When the drill bit encounters hard formations or alternate soft and hard formations during the drilling process, problems such as stick-slip and broken teeth often occur, which not only slows down the drilling speed, but also is not conducive to controlling the quality of the wellbore and is not conducive to the later stage Well cementing, well completion and other work. Therefore, improving the rock-...

Claims

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Application Information

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IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 田家林杨应林杨琳周韬胡书辉杜凡蔡旭东
Owner SOUTHWEST PETROLEUM UNIV
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