Downhole rotary impact tool based on magnetic force and method

A technology of impact tools and magnetic force, which is applied in drilling equipment, earthwork drilling, and driving devices for drilling in boreholes, etc. It can solve the mismatch of effective working time of drill bits, easy failure of impact mechanism, unstable performance of rotary punching tools, etc. problems, to achieve the effect of improving downhole applicability, improving work stability, and improving rock breaking efficiency

Pending Publication Date: 2018-07-06
SINOPEC SSC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main impact rotary tools mainly include valve-type hydraulic impactors, jet-type hydraulic impactors, jet-suction impactors, and self-excited oscillation rotary impact tools. The main problems of these impact rotary tools include: work performance dependence Drilling fluid is easily affected by flow fluctuations, and the drilling fluid requires no solid phase or low solid phase content, which makes the construction operation difficult; the impact mechanism is prone to failure, the service life is not long enough, and does not match the effective working time of the drill bit; rotary punching Tool performance is unstable, downhole tool adaptability is not high

Method used

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  • Downhole rotary impact tool based on magnetic force and method
  • Downhole rotary impact tool based on magnetic force and method
  • Downhole rotary impact tool based on magnetic force and method

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Experimental program
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Embodiment 1

[0018] Example 1: Combining figure 1 , the magnetic-based downhole rotary impact tool mentioned in the present invention has a technical solution: including a transmission central shaft, a tool outer cylinder, an upper magnetic ring 3, an auxiliary spring 4, a lower magnetic ring 5, a hard alloy bushing 6, an output The joint 9, the transmission central shaft includes the upper transmission central shaft 1 and the lower transmission central shaft 7, the upper transmission central shaft 1 and the lower transmission central shaft 7 are connected by threads, and a tool outer cylinder is arranged outside the transmission central shaft 1, and the tool outer cylinder It includes the tool upper outer cylinder 2 and the tool lower outer cylinder 8, the tool upper outer cylinder 2 and the tool lower outer cylinder 8 are connected by threads, and a connecting head 17 is arranged on the upper part of the upper transmission central shaft 1, and the screw drilling tool is connected to the s...

Embodiment 2

[0026] Embodiment 2: The difference from Embodiment 1 is that the central hole of the cemented carbide bushing 6 is circular, the outer section of the cemented carbide bushing 6 is a regular hexagon, the inner section of the tool outer cylinder is a regular hexagon, and the tool The outer cylinder is sleeved on the cemented carbide bushing 6 to ensure that the cemented carbide bushing 6 can only move along the central axis.

[0027] The tool structure is simple and easy to implement, the construction operation is less difficult and the underground applicability is improved. The invention introduces the magnetic force to control the impact mechanism, which can realize the non-contact arrangement of the impact function and greatly improve the service life of the impact mechanism. The upper magnetic force ring rotates with the central axis of the transmission , the strong magnetic blocks are staggered and arranged at equal intervals in the circumferential direction. The lower magn...

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Abstract

The invention relates to a downhole rotary impact tool based on magnetic force and a method. According to the technical scheme, a tool outer barrel is arranged on the outer side of a transmission center shaft, an upper magnetic ring is arranged on the upper transmission center shaft, the upper magnetic ring is fixedly connected with the upper transmission center shaft through a limiting bearing and a thrust bearing. The lower part of the thrust bearing is provided with a spring base. The spring base is connected with the upper end of an auxiliary spring. The lower end of the auxiliary spring is connected with a lower magnetic ring. The lower magnetic ring is fixedly connected with a cemented carbide shaft sleeve. A lower transmission center shaft is arranged at the lower part of the uppertransmission center shaft. The downhole rotary impact tool based on magnetic force and the method have the beneficial effects that the tool is simple in structure, easy to achieve and small in construction operation difficulty, downhole application is improved, a magnetic control impact mechanism is introduced, non-contact arrangement of the impact function can be realized, and the service life ofthe impact mechanism is greatly prolonged.

Description

technical field [0001] The invention relates to a petroleum downhole construction device and method, in particular to a downhole magnetic-based rotary impact tool and method. Background technique [0002] Oil and gas wells are channels for obtaining crude oil and natural gas. How to establish this channel accurately and with high quality has always been a major problem in the field of drilling engineering. According to the current situation and development forecast of oil and gas drilling engineering in the world, the oil drilling industry will face With more complex geological conditions and harsher natural environments, as the exploration and drilling of oil and natural gas continue to develop into deep layers of the earth, the number of hard formations and interlaced hard and soft formations encountered in the actual exploration and drilling process is gradually increasing , these formations lead to greatly reduced drilling efficiency. Rotary percussion drilling technolo...

Claims

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Application Information

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IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 赵国山邱维清李胜乐李建超王秀春太东华蒋莉孙梅雒鹏彬李茜朱海龙
Owner SINOPEC SSC
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