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Hydraulic pulse type churn screw drill

A technology of screw drilling tools and hydraulic pulse, which is applied to drilling equipment, earthwork drilling, and driving devices for drilling in boreholes. It can solve the problems of low mechanical penetration rate and difficult drilling in hard formations, and achieve high mechanical penetration rate. , improve rock breaking efficiency, simple mechanical structure

Inactive Publication Date: 2017-06-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydraulic pulse type rotary punching screw drilling tool in order to solve the problems of difficult drilling in hard formations and low ROP in the drilling process.

Method used

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  • Hydraulic pulse type churn screw drill

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Embodiment Construction

[0013] Such as figure 1 and figure 2 As shown, a hydraulic pulse type rotary punching screw drilling tool of the present invention is composed of an upper joint 1, a screw stator 2, a screw rotor 3, a cardan shaft housing 4, a cardan shaft 5, an upper shaft body 6, and a thrust bearing a7 , diversion housing 8, transmission pin 9, transmission piston 10, lower housing 11, thrust bearing b12, half-ring clip 13, thrust bearing c14, disc spring 15, anti-drop cap 16 and lower shaft body 17; its structure The features are: the upper end of the upper joint 1 is connected to the upper drill string with threads, and the lower end of the lower shaft body 17 is connected to the drill bit with threads; the inner cavity of the screw stator 2 is provided with a rubber stator sleeve, and the upper end of the screw stator 2 is connected to the lower end of the upper joint 1 with threads. The lower end of the screw stator 2 is connected with the upper end of the cardan shaft housing 4 with ...

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Abstract

The invention relates to a hydraulic pulse type churn screw drill for accelerated drilling of deep wells and ultra-deep wells in petroleum and natural gas industry and solves the problems that drilling a hard formation is difficult and mechanical drilling speed is low during drilling process. According to the technical scheme, the hydraulic pulse type churn screw drill is characterized in that the upper end of a screw stator is in threaded connection with the lower end of an upper connector, the lower end of the screw stator is in threaded connection with the upper end of a universal shaft shell, a screw rotor is disposed in an inner cavity of the screw stator, the upper end of a universal shaft is in threaded connection with the lower end of the screw rotor, the lower end of the universal shaft is in threaded connection with the upper end of an upper shaft body, the upper end of a guide shell is in threaded connection with the lower end of the universal shaft shell, the lower end of the guide shaft is in threaded connection with the middle of a lower shell, an upper cylinder of a transmission piston is in clearance fit with the middle of an inner cavity of the upper shaft body, and the lower end of the transmission piston is in threaded connection with the middle of the lower shell. The hydraulic pulse type churn screw drill can generate rock-breaking torque and provide high-frequency axial impact, thereby improving bit's rock-breaking efficiency and mechanical drilling speed; the hydraulic pulse type churn screw drill is simple in structure and has few vulnerable parts.

Description

technical field [0001] The invention relates to a hydraulic pulse type rotary punching screw drilling tool used for increasing the drilling speed of deep wells and ultra-deep wells in 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, the drilling depth continues to increase, and the number of deep wells and ultra-deep wells is increasing. After the drilling depth increases, the hardness and strength of the rock will increase significantly under the confining pressure of the formation, and the drillability will be greatly reduced. In order to improve the rock-breaking efficiency of the drill bit in deep formations, a feasible and effective method is to use rotary percussion drilling, that is, to provide axial impact force for the drill bit while rotating the well. Cutting the rock under variable WOB can greatly improve the rock-breaking efficiency, espec...

Claims

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Application Information

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IPC IPC(8): E21B4/00
CPCE21B4/00
Inventor 张梁李镕成梁政邓雄赵勇
Owner SOUTHWEST PETROLEUM UNIV
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