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High-frequency torsion impact drilling tool

A percussion drilling, high-frequency technology, applied in percussion drilling, drilling equipment, earthwork drilling and production, etc., can solve problems such as low mechanical penetration rate, poor well quality, and difficult drilling in deep and ultra-deep wells, etc. It achieves the effect of increasing the mechanical drilling speed, simple and effective control, and improving the rock breaking efficiency

Inactive Publication Date: 2016-11-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-frequency torsional percussion drilling tool in order to solve the problems of difficult drilling in deep and ultra-deep wells, low ROP and poor wellbore quality.

Method used

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Embodiment Construction

[0014] Such as figure 1 with figure 2 As shown, a high-frequency torsional percussion drill tool of the present invention is composed of an upper joint 1, a stator housing 2, a screw stator 3, a screw rotor 4, a cardan shaft 5, a cardan shaft housing 6, a rotary valve core 7, Valve seat 8, thrust bearing 9, valve housing 10, piston 11, transmission pin 12, transmission shaft 13, anti-drop cap 14, screw shaft 15, transmission housing 16, steel ball 17, disc spring 18 and lower shaft body 19 Composition; Its structural features are: the upper end of the upper joint 1 is connected with the upper drill string by threading, the lower end of the lower shaft body 19 is connected with the drill bit threaded; the screw stator 3 is fixed in the inner cavity of the stator housing 2, and the screw rotor 4 is inserted into the screw stator 3. Inner cavity; the upper end of the stator housing 2 and the lower end of the upper joint 1 are threadedly connected; the lower end of the stator housi...

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Abstract

The invention relates to a high-frequency torsion impact drilling tool used for drilling engineering in petroleum and gas industries. The problems that hard formation drilling of a deep well and an extra-deep well is difficult, the drilling speed of machinery is low, and well body quality is poor are solved. According to the technical scheme, the upper end of a cardan shaft and the lower end of a screw rotor are connected in a threaded mode, and the lower end of the cardan shaft and the upper end of a rotary valve element are connected in a threaded mode; a thrust bearing is installed on a protruding step of the upper portion of a valve seat inner cavity, and the outer circle of the lower portion of the rotary valve element are in clearance fit; the upper end of a valve shell and the lower end of a cardan shaft shell are connected in a threaded mode, and the lower end of the valve sheel and the middle of a valve seat are connected in a threaded mode; six steel balls are installed in six semi-spherical grooves in the middle of a transmission shell inner cavity and six spiral grooves of a protruding outer circle of the middle of a spiral shaft correspondingly; and the upper end of a lower shaft body and the lower end of a transmission shell are connected in a threaded mode. The high-frequency torsion impact drilling tool can generate high-frequency axial impact vibration, and improves the rock breaking efficiency and mechanical drilling speed of a drill bit. The lower shaft body generates high-frequency micro-amplitude circumferential reciprocating swinging, and can effectively prevent a stick-slip phenomenon.

Description

Technical field [0001] The invention relates to a high-frequency torsional percussion drilling tool used in drilling engineering of the petroleum and natural gas industry. Background technique [0002] With the continuous development of drilling technology in the oil and gas industry at home and abroad, drilling depths continue to increase, and deep and ultra-deep wells are increasingly used, which has become an inevitable trend in drilling engineering. However, as well depths continue to increase, geological conditions have become more complex, formation pressure continues to rise, the strength and hardness of deep formations have increased significantly, and drillability has been greatly reduced. During the development of deep and ultra-deep wells, lateral whirl, gravity accumulation and stick-slip are often generated, which greatly reduces drilling efficiency, destroys well quality, and causes serious wear and tear on drill bits and drill pipes. [0003] One of the effective me...

Claims

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Application Information

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IPC IPC(8): E21B1/26
CPCE21B1/02
Inventor 张梁梁政赵勇
Owner SOUTHWEST PETROLEUM UNIV
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