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Small-diameter deep-hole directional drilling down-hole signal butt joint system

A directional drilling, small-diameter technology, which is applied in directional drilling, earthwork drilling, wellbore/well parts, etc., can solve the problems of being unable to apply to small-diameter deep holes, etc., and achieves wide practicability, ease of operation, and good response , Good effect of insulation and sealing performance

Pending Publication Date: 2017-04-26
NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU +1
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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 small-diameter deep hole directional drilling downhole signal docking system to at least solve the technical problem that the wired directional-while-drilling instrument in the prior art cannot be applied to small-diameter deep holes

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  • Small-diameter deep-hole directional drilling down-hole signal butt joint system

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as figure 2 with image 3 As shown, in the downhole signal docking system for small-diameter deep hole directional drilling in a preferred embodiment of the present invention, the probe 11 is placed separately from the signal transmission cable 12; the probe 11 is placed in the non-magnetic drill collar 4, and the probe 11 follows the The drill collar 4 is lowered into the downhole; the docking system mainly includes the downhole signal docking device 7, which is installed on the upper end of the probe 11 and lowered into the downhole; and the ground signal docking device 8, and the upper end of the ground signal docking device 8 is connected to the signal transmission cable 12 , the lower end of the surface signal docking device 8 is docked with the upper end of the downhole signal docking device 7, so that the signal t...

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Abstract

The invention provides a small-diameter deep-hole directional drilling down-hole signal butt joint system. The small-diameter deep-hole directional drilling down-hole signal butt joint system comprises a down-hole signal butt joint device and a ground signal butt joint device. The down-hole signal butt joint device is installed at the upper end of a probe and is put into a well. The upper end of the ground signal butt joint device is connected with a signal transmission cable. The lower end of the ground signal butt joint device is in butt joint with the upper end of the down-hole signal butt joint device. The signal transmission cable is connected with the probe to achieve signal transmission and complete orientation. Through the small-diameter deep-hole directional drilling down-hole signal butt joint system, when directional drilling is needed in small-diameter drilling, replacement of a large drilling tool is not needed, and construction time and cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of deep hole directional drilling, in particular, the invention relates to a downhole signal docking system for small diameter deep hole directional drilling. Background technique [0002] Due to the ground conditions are not allowed, the stratum dip angle is too large or the borehole inclination does not meet the design requirements, etc., directional drilling is required during drilling construction. At present, the directional-while-drilling equipment widely used in China adopts the wired directional-while-drilling system, such as figure 1 As shown: the wired directional instrument consists of four parts including a probe 11, a signal transmission cable 12, a ground winch 13 and a digital display 14 (such as figure 1 ). The probe 11 is sent into the non-magnetic drill collar 4 from the drill pipe 31 of the drilling rig 3 through the signal transmission cable 12 through the ground winch 13 and the pulley...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12E21B7/04
CPCE21B7/04E21B47/12
Inventor 徐华富靳铂詹金明郑腾龙姚直书杨健胡曦孙家应余大有陈国永
Owner NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU
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