Downhole torque self-balance cable drilling tool system

A self-balancing, drilling tool technology, applied in the wellbore driving device, drill pipe, drill pipe, etc., can solve the problem of short coiled tubing life, strengthen real-time monitoring and control, get rid of depth dependence, reduce cost effect

Active Publication Date: 2017-05-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since coiled tubing drilling technology does not fundamentally change the detrimental effect of reactive torque on coiled tubing, the life of coiled tubing is shorter than that of conventional drill pipe

Method used

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  • Downhole torque self-balance cable drilling tool system
  • Downhole torque self-balance cable drilling tool system
  • Downhole torque self-balance cable drilling tool system

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Embodiment Construction

[0025] See Figure 1 to Figure 6 As shown, the present invention proposes a downhole torque self-balancing cable drilling tool system. The drilling tool system is composed of internal and external bit components, power components, internal and external bit pressure adjustment systems, mud circulation systems and jam release systems. The upper drilling tool of the cable drilling tool system only bears the axial force, and the lower drilling tool is reversely rotated by the inner and outer drill bits to achieve torque balance. figure 2 The shown inner and outer drill bit assembly is used for reverse rotation cutting rock, and the surrounding rock is required to provide a small anti-torque moment to the rock in contact with the drill bit, so only a small disturbance to the surrounding rock is generated. Even when drilling in a broken formation, the well wall 50 It is also relatively regular and stable. The inner and outer drill bit assembly includes inner drill bit 1, outer drill...

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Abstract

The invention relates to a downhole torque self-balance cable drilling tool system, and belongs to the technical field of drilling engineering equipment. The drilling tool system is composed of an inner and outer drill bit assembly, a power assembly, an inner and outer drill bit pressure adjustment system, a slurry circulation system and a blockage release system. An inner drill bit and an outer drill bit are used for crushing rock in a reverse rotation mode, and micro-disturbance drilling of surrounding rock is realized. A stator set and a rotor set of a power motor are used for driving the outer drill bit and the inner drill bit separately, the drill bits and a power system realize torque self-balance overall, and no torque action is generated on an upper drilling tool. A power source, the slurry circulation system, a logging system and the like are integrated to the drilling tool, and normal operations such as drilling, trip-out and trip-in operation and well logging during drilling can be realized on the ground only through winch equipment for drilling tool trip-out and trip-in. When drilling blockage occurs, the drilling tool is lifted up through a winch, and through forward and reverse alternate rotation of a blockage release drill bit, rock granules at the blockage position are removed to realize blockage release.

Description

Technical field [0001] The invention belongs to the technical field of drilling engineering equipment, and particularly relates to a downhole torque self-balancing cable drilling tool system suitable for geological drilling, hydrological and water well drilling, oil and gas drilling, scientific drilling, and underground construction rescue drilling. Background technique [0002] In the process of drilling (drilling), the drill string is deformed into a spiral under the action of torque, and it collides and rubs with the well wall during rotation. Wear and alternating loads can easily damage the drill string in advance, resulting in broken drill tools, etc. The occurrence of accidents in the well caused huge losses to the entire project. As the drilling depth increases, the length of the drill string lengthens, and the proportion of energy lost by the drill rod overcoming various frictional resistances in the well in the process of transmitting weight and torque increases. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/084E21B4/04E21B21/12
CPCE21B4/04E21B19/084E21B21/12E21B25/00E21B10/04E21B21/08E21B4/003E21B7/00E21B47/00
Inventor 高科孙友宏王治刚赵研博坤谢晓波王海勇王晓初刘召王亚斐陈杭凯彭赛宇徐英超邢立东
Owner JILIN UNIV
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