Vortex type hydraulic pulse axial impact tool

A technology of hydraulic pulse and axial impact, which is used in drilling equipment, earth-moving drilling, driving devices for drilling in wellbore, etc., can solve the problems of vulnerable self-excited oscillating nozzles, small hydraulic pulse amplitude, and weakened hydraulic pulse. , to achieve the effect of optimizing the bottom hole flow field, improving the ROP and long service life

Inactive Publication Date: 2017-07-07
YANGTZE UNIVERSITY
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AI Technical Summary

Problems solved by technology

For example, in the patent CN201520631449, a hydraulic pulse device for drilling, a pulsed jet is formed through self-excited oscillation to apply periodic impact force to the drill bit, but the amplitude of the hydraulic pulse generated by the self-excited oscillation chamber is small, and the self-excited oscillation nozzle is vulnera

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  • Vortex type hydraulic pulse axial impact tool
  • Vortex type hydraulic pulse axial impact tool
  • Vortex type hydraulic pulse axial impact tool

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Embodiment Construction

[0017] Such as figure 1 Among them, a vortex type hydraulic pulse axial impact tool includes a tubular shell 1, a hydraulic pulse generating device 2 is arranged in the shell 1, a casing 1 is connected with a jacket 3 to fix the hydraulic pulse generating device 2, and the casing 3 The mandrel 4 matched with it is set, the connection between the outer jacket 3 and the mandrel 4 can be a spline 6 or a polygon 7 connection, the lower end of the mandrel 4 is connected with the anti-drop nut 5, the lower end of the housing 1 is provided with a lower joint, and the mandrel 4 The upper end is provided with an upper joint, and the upper and lower joints can be male joints or female joints as required.

[0018] Such as figure 2 Among them, the hydraulic pulse generating device 2 is divided into two parts 201 and 202 along the diameter, and the section is 203 .

[0019] Such as image 3 Among them, a fluid inlet 204 and a fluid outlet 213 are provided on the section 203, and the fl...

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Abstract

The invention provides a vortex type hydraulic pulse axial impact tool, which comprises a tubular shell, a hydraulic pulse generating device is arranged in the shell, a jacket is connected to the casing to fix the hydraulic pulse generator, and a mandrel matched with it is arranged in the jacket , the connection between the jacket and the mandrel can be a spline or a polygonal connection, the lower end of the mandrel is connected with an anti-drop nut, and the characteristics of the pressure wave generated by the pulse generating device can be controlled by the growth and attenuation of the eddy current in the vortex cavity flow path, The flow path is a bistable jet switch, one flow path points to the tangential direction of the vortex cavity, and the other flow path points to the fluid outlet. By adopting the above structure, it has the following beneficial effects: the hydraulic energy at the bottom of the well increases the impact force of the drill bit, optimizes the flow field at the bottom of the well, improves the force condition of the drill bit and rock, and increases the mechanical penetration rate.

Description

technical field [0001] The invention relates to the technical field of drilling speed increase in oil and natural gas exploitation, and relates to a vortex type hydraulic pulse axial impact tool. Background technique [0002] In recent years, with the increasing number of horizontal wells and deep wells, when drilling hard and abrasive formations, the use of conventional power drilling tools generally has the problem of low ROP. In order to improve drilling efficiency, technologies such as pulsed cavitation jet drilling, rotary percussion drilling, particle jet drilling, ultra-high pressure jet drilling, and managed pressure drilling have emerged successively. However, these technologies have certain deficiencies in field application, such as particle jet drilling technology and managed pressure drilling technology with complex equipment and large investment, ultra-high pressure jet drilling technology needs to provide high-pressure mud pumps; rotary impact drilling technolo...

Claims

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Application Information

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IPC IPC(8): E21B4/06
CPCE21B4/06
Inventor 邓福成张策
Owner YANGTZE UNIVERSITY
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