Laser directional drilling tool for coal-bed-methane level development hole and drilling method using same

A directional drilling and hole laser technology, which is used in directional drilling, earth-moving drilling, surveying, etc., can solve the problems of high drill bit consumption, poor drilling tool direction control performance, low drilling efficiency, etc., and achieves high drilling efficiency, The drill bit consumption is small and the effect of reducing the drill bit consumption

Active Publication Date: 2012-12-05
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to solve the problems of low drilling efficiency, poor direction control performance of drilling tools and high consumption of drill bits

Method used

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  • Laser directional drilling tool for coal-bed-methane level development hole and drilling method using same
  • Laser directional drilling tool for coal-bed-methane level development hole and drilling method using same
  • Laser directional drilling tool for coal-bed-methane level development hole and drilling method using same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: The structure of a laser directional drilling drilling tool for horizontal mining holes of coalbed methane in the present invention is as follows: figure 1 , 2 As shown, the drilling tool includes a laser emitting head and its deflection control parts, deflection execution parts and circuit parts. The laser emitting head adopts the LLK-HP model in the HIGHYAG series products.

[0042] The laser emitting head deflection control components include drill pipe joint 1, transition pipe joint 2, bearing cap A4, fiber optic ring A7, bearing connection inner ring CA8, battery box 58, circuit board support seat 11, bearing connection inner ring BB55 And the collector ring 17, the drill pipe joint 1 is threadedly connected with the drill pipe, the drill pipe joint 1, the transition pipe joint 2, the shell connecting ring E63, the shell A61, the shell connecting ring A60, the shell B56, and the shell are connected The ring B48 and the shell C46 are connected by thre...

Embodiment 2

[0054] Embodiment 2: A kind of drilling method of the present invention applying the laser directional drilling drilling tool for the horizontal mining hole of coalbed methane described in Embodiment 1 of the present invention specifically has the following steps:

[0055](1) Prepare the laser directional drilling tool for the horizontal mining hole of coalbed methane, and prepare the drill pipe matched with the drilling tool at the same time. The drill pipe is provided with a thickened iron ring every 5m on the drill pipe shell;

[0056] (2) Lower the drilling tool to the position where the coal rock needs to be drilled. When drilling, turn on the auxiliary airflow pump, and let the auxiliary airflow take away the cuttings while drilling;

[0057] (3) When drilling, the depth signal receiving circuit passes through the HMC1021Z reluctance sensor to detect the reluctance of the thickened iron ring set every 5m on the drill pipe shell, judge whether it has drilled 5m, and calcul...

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Abstract

The invention relates to a laser directional drilling tool for a coal-bed-methane level development hole and a drilling method using the same. The drilling method includes: using high-energy laser beams to rapidly heat local coal rock to enable the coal rock to break due to excessively high internal stress, and allowing high-speed auxiliary air to bring away debris of the coal rock. The drilling tool comprises a laser emitter, and a deflection control part and a deflection actuating part thereof. The deflection control part of the laser emitter is composed of a battery box, a circuit board and the like. The deflection actuating part of the laser emitter comprises a cam and a gear. The cam controls deflection of the laser emitter. The gear controls overall rotation of the laser emitter. In the drilling method, the drilling tool is lowered into a drill hole to be drilled, drilling is started according to the principle of laser rock crushing, data acquisition, storage and processing are performed simultaneously, and a stepping motor is adjusted to control deflection of the laser emitter so as to automatically and directionally correct the deflection in drilling. The drilling tool and the drilling method are applied to directional drilling for the coal-bed-methane level development hole and are higher in drilling efficiency, better in directional control performance and lower in bit consumption.

Description

technical field [0001] The invention relates to a laser directional drilling tool and a drilling method for a horizontal mining hole of coalbed methane, in particular to a drilling tool and a drilling method for crushing coal and rock by using a laser. Background technique [0002] With the aggravation of energy shortage, the coalbed methane industry has been paid more and more attention by countries all over the world, and the extraction and utilization of coalbed methane are also increasing year by year. However, traditional mechanical drilling methods are not enough to meet the needs of modern development. Traditional mechanical drilling has the following disadvantages: low drilling efficiency, poor steering performance, and high drill bit consumption. Therefore, a laser directional drilling tool for coalbed methane mining holes is proposed. Moreover, experiments have shown that laser rock breaking is feasible. The invention drills wells through the method of laser cru...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B7/10E21B47/04E21B47/024
Inventor 文国军杨玲芝王玉丹张鹏韩磊白江浩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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