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Rotary screw drill tool

A technology of screw drilling tools and casings, which is applied to drill pipes, drill pipes, drilling equipment, etc., can solve the problems of unsatisfactory use effect of hydraulic impactors, low rock breaking efficiency and mechanical penetration rate, etc. The effect of rock efficiency, improving service life, improving effect

Inactive Publication Date: 2014-09-10
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 rotary punching screw drilling tool in order to solve the problems of low rock-breaking efficiency and low ROP of the drill bit in deep and ultra-deep wells and the unsatisfactory use effect of the existing hydraulic impactor.

Method used

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  • Rotary screw drill tool
  • Rotary screw drill tool
  • Rotary screw drill tool

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Embodiment Construction

[0013]According to the drawings, a rotary punching screw drilling tool consists of a bypass valve housing, a valve core, a spring, a valve body, a retaining ring, an anti-drop joint, an anti-drop nut, an anti-drop connecting rod, a motor housing, Stator, rotor, cardan shaft housing, living hinge, cardan shaft connecting rod, adapter, outer housing, floating piston, upper shaft body, bearing housing, anti-wear washer, jumping pad, rubber washer, compensation box, upper gear ring, upper sub-ring, cam housing, roller seat, roller, cam, cam seat, spline pin, lower retaining ring, lower sub-ring, bottom piston housing, lower shaft body, lower housing, sealing box, floating ring , an impact plate, and an impact nozzle, and is characterized in that the shell part, the bypass valve housing 1, the anti-drop joint 6, the motor housing 9, the cardan shaft housing 12, the outer housing 21, the bearing housing 24, and the cam housing 31. The bottom piston housing 39 and the lower housing 4...

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Abstract

The invention discloses a rotary screw drill tool used in fields of petroleum drilling and the like and solves the problem about crushing efficiency of hard rocks in extradeep wells. The technical scheme includes that a bypass valve shell, a fall prevention joint, a motor shell, a universal shaft shell, an outer shell, a bearing shell, an outer cam shell, a bottom piston shell and a lower shell are sequentially connected through screw threads; an upper shaft and a lower shaft are connected through a spline, and eight spline pins are evenly and circumferentially distributed between the upper shaft and the lower shaft; a roller holder is fixed on the outer cam shell through three bolts which are circumferentially and evenly distributed, a cam is circumferentially fixed on the cam bushing through three evenly distributed bolts, a roller is mounted on a roller holder, the cam bushing is connected to the lower shaft in a threaded manner, and a lower split ring is clamped in the lower shaft through a serrated trough and is fixed through a lower retaining ring. By the arrangement, the lower shaft of the screw drill tool is enabled to generate soft axial impact with a certain frequency and stable in size, efficiency of rock breaking of a drill is improved, mechanical drilling rate is increased, and drilling cost is thereby lowered.

Description

technical field [0001] The invention relates to a screw drilling tool with rotary impact function used in the fields of petroleum drilling, mining, geological drilling and the like. Background technique [0002] With the gradual depletion of well-preserved shallow oil and gas resources, the world's drilling is gradually developing into deep wells, ultra-deep wells and other fields. After the well depth increases, the hardness and strength of rocks under the confining pressure of the formation will increase significantly, resulting in drill bits The rock-breaking efficiency is not high, the life is greatly reduced, and the drilling speed is greatly reduced, and the key to improving the drilling speed is how to improve the rock-breaking efficiency of the drill bit. In order to improve the rock-breaking efficiency of the drill bit, the combination of the downhole tool and the drill bit is used to generate vibration to increase the rate of penetration. Its application includes t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/22
Inventor 田家林李友杨琳朱永豪付传红庞小林夏天鸿刘刚杨志吴纯明袁长福
Owner SOUTHWEST PETROLEUM UNIV
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