A torsional impact screw drilling tool

A technology for screw drilling tools and drilling fluids, which is applied to drilling tools, driving devices for rotary combined drilling, drill bits, etc., and can solve the problems of poor deflection ability, low rock breaking efficiency, and stick-slip of the drill bit.

Active Publication Date: 2021-08-20
BEIJING UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a torsional percussion screw drilling tool, which solves the problems of drill bit stick-slip, low rock-breaking efficiency or poor deflection ability in the prior art. The tool is combined with good compatibility, which can effectively improve the drilling speed and drilling capacity of the drilling tool

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  • A torsional impact screw drilling tool
  • A torsional impact screw drilling tool
  • A torsional impact screw drilling tool

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Embodiment Construction

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0039] The specific implementations of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or interv...

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Abstract

The present invention is a torsional percussion screw drilling tool, which includes a screw drilling tool body. The screw drilling tool body includes a bypass valve assembly for controlling the flow direction of drilling fluid. A motor assembly is arranged below the bypass valve assembly. The motor assembly is connected to the transmission shaft assembly through the cardan shaft assembly, and the motor assembly is used to convert the hydraulic power of the drilling fluid into mechanical energy that drives the transmission shaft assembly to rotate around the central axis. The formed bottom is used to connect the drill bit; the lower part of the transmission shaft assembly is provided with an axially fixed torsional impact assembly, and the torsional impact assembly is used to convert the fluid energy of the drilling fluid into into the torsional impact force. This tool solves the problems of drill bit stick-slip, low rock-breaking efficiency or poor deflection ability existing in the prior art. With ROP and drilling capacity.

Description

technical field [0001] The invention relates to downhole drilling tools in the field of petroleum development, in particular to a torsional percussion screw drilling tool. Background technique [0002] With the rapid development of drilling engineering, screw drilling tools have also made great progress. Screw drilling tools are the most widely used downhole power tools in drilling engineering. In order to improve the drilling capacity and mechanical speed of screw drilling tools, some scholars at home and abroad have increased the torque of screw drilling tools by improving the motor, such as series motors and extended motors. Although the drilling speed is improved, the wear of the drill bit is accelerated. In addition, when drilling in hard formations, there are large fluctuations in the rotational speed and torque applied to the drill bit, and the stick-slip phenomenon will still occur. The stick-slip effect greatly reduces the rock-breaking efficiency of the drill bit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B6/00E21B10/46E21B12/00
CPCE21B6/00E21B10/46E21B12/00
Inventor 查春青柳贡慧李军
Owner BEIJING UNIV OF TECH
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