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A mechanical torsional percussion drilling tool

A percussion drilling, mechanical technology, applied in drilling equipment, driving devices for drilling in boreholes, earthwork drilling and production, etc., can solve problems such as stick-slip, torsional oscillation, fatigue failure, etc.

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a serious stick-slip phenomenon when the PDC bit drills in the deep bottom
This stick-slip phenomenon easily leads to the torsional oscillation of the drill string connected to the PDC bit during the drilling process, which makes the PDC bit have the problems of low ROP and fatigue failure during the drilling process

Method used

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  • A mechanical torsional percussion drilling tool
  • A mechanical torsional percussion drilling tool
  • A mechanical torsional percussion drilling tool

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Experimental program
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] Such as figure 1 and figure 2 As shown, the percussion drilling tool includes an upper base body 1 , a lower base body 2 , an impact hammer assembly 3 , and a central rotating shaft 4 . The percussion drilling tool is provided with a screw rod or a turbo drill (not shown) on its upper part to provide rotational power, that is, by making the screw rod or the lower end of the turbine rotor in the screw rod or turbo drill the spline groove and the upper end of the central rotating shaft 4 Set the spline groove 41 (see figure 2 ) to cooperate with the installation, so as to realize the purpose that the screw or the turbine rotor drives the central rotating shaft 4 to rotate together.

[0032] Such as figure 1 As shown, in the embodiment of the present application, the upper base body 1 has a hollow area 11 inside. The shape of the upper base body 1 can be, for exa...

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Abstract

The invention relates to a mechanical torsional impact drilling tool, comprising an upper base body which is provided with a hollow region inside and is provided with at least an installing groove on an inner peripheral wall, a lower base body which is connected with the upper base body, an impact hammer assembly passing into the hollow region, and a central rotating shaft. The impact hammer assembly is provided with an impact hammer portion which protrudes outward in a radial direction and is in an installing groove. The central rotating shaft passes through the internal part of the impact hammer assembly until a passing-in end contacts with the lower base body. The central rotating shaft is provided with an outer boss which protrudes outwards in a radial direction and is used to drive the impact hammer portion to swing in a reciprocated manner in the installing groove. The impact drilling tool is advantaged in that a defect of stick-slip phenomenon of a drill in a well drilling process is prevented, and the tool is advantaged by improving penetration rate, stabilizing a drilling process, and improving service life of a drill stem and a PDC bit.

Description

technical field [0001] The invention relates to the technical field of oil and gas downhole drilling tools, in particular to a mechanical torsional percussion drilling tool. Background technique [0002] With the deepening of oil and gas development, onshore shallow oil and gas resources began to gradually deplete, thus, the exploration of oil and gas resources gradually shifted to the deep bottom layer. There is a high overlying pressure in the deep bottom layer, which leads to relatively high hardness, compressive strength, shear strength and abrasiveness of the rock in the deep bottom layer, so that the speed of the mechanical drilling tool extending into the deep bottom layer A sharp decline. [0003] At present, the main drilling bit in oil and gas development is PDC (diamond compact) bit. However, there is a serious stick-slip phenomenon when the PDC drill bit is drilling in the deep bottom layer. This stick-slip phenomenon easily causes the drill string connected w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/16
Inventor 崔晓杰秦金立张瑞尹垒刘阳马兰荣韩峰
Owner CHINA PETROLEUM & CHEM CORP
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