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Combined type reaming method and device

A combined and reaming drill bit technology, which is applied in drilling equipment and methods, earthwork drilling, percussion drilling, etc., can solve the problems of low work efficiency, difficulty in drilling back, low reliability, etc., and achieve wear resistance And good stability, fast and efficient reaming, and the effect of improving reaming efficiency

Pending Publication Date: 2020-10-16
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing gas drainage drilling and reaming devices and reaming methods have problems such as low work efficiency, difficulty in drilling back, and low reliability.

Method used

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  • Combined type reaming method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention provides a joint reaming method, which includes the following steps:

[0027] 1) Drilling location: Measure and pay off according to coal seam conditions to locate the drilling location;

[0028] 2) Drilling: First, use an ordinary gas extraction rig to drill an ordinary borehole through the rock layer into the coal seam, stop drilling after the ordinary borehole depth reaches the design position, and withdraw the ordinary bit;

[0029] 3) Reaming: adopting a combination of hydraulic reaming and mechanical flexible reaming for flexible joint reaming;

[0030] 31) Hydraulic reaming, using a hydraulic cutting head with a high-pressure nozzle in the radial direction for hydraulic reaming

[0031] 32) Mechanical flexible reaming. A flexible reaming bit is connected to the rear end of the hydraulic cutting head, and the flexible reaming bit is used for mechanical flexible reaming. The flexible reaming bit is driven by a drill rod with a geared motor. The hole dr...

Embodiment 2

[0033] Such as Figure 1~2 As shown, the present invention also provides a combined reaming device, which includes a drill pipe 1, a hydraulic cutting head 2 and a flexible reaming drill bit 3. One end of the drill pipe 1 is in transmission connection with a geared motor (not shown in the figure) , The other end is fixedly connected to the flexible reaming drill bit 3, the hydraulic cutting head 2 is connected to the end of the flexible reaming drill bit 3 away from the drill pipe 1, the drill pipe 1, the flexible reaming drill bit 3 and the hydraulic cutting head 2 are provided There are intersecting high-pressure water channels 4, the outer circular surface of the hydraulic cutting head 2 is provided with a plurality of high-pressure nozzles 5 along the radial direction, and the end of the hydraulic cutting head 2 away from the flexible reaming drill bit 3 is also connected with a tunneling drill bit 6, The flexible reaming drill bit 3 includes a reaming seat 3-1 and a swing ...

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Abstract

The invention relates to a combined type reaming method and device in the technical field of coal mine drilling. On the basis of common drilling, flexible combined reaming is conducted in the mode that hydraulic reaming and mechanical flexible reaming are combined through the combined type reaming device. The combined type reaming device comprises a drill rod, a hydraulic cutting head and a flexible reaming drill bit, wherein the flexible reaming drill bit comprises a reaming base and a flail chain or a flail cable; the flail chain or the flail cable is made of high-strength abrasion-resistantmetal materials; a high-pressure hose is arranged in the flail chain or the flail cable in a penetrating mode; and a high-pressure water jet orifice is formed in the end, away from the reaming base,of the high-pressure hose. According to the combined type reaming method and device, coal mine gas extraction drilling is rapidly and efficiently reamed in the mode that hydraulic cutting and flexiblemechanical reaming are combined, and the device is simple in structure, high in reliability, good in abrasion resistance and stability, capable of facilitating drill retreating and suitable for application and popularization.

Description

Technical field [0001] The invention belongs to the technical field of coal mine drilling, and specifically relates to a combined hole reaming method and device. Background technique [0002] Before coal mine collection, it is necessary to drill holes for gas extraction. When drilling holes, it is necessary to drill holes from the rock layer to the coal seam. In order to save drilling costs and increase gas extraction efficiency, it is necessary to ensure that the hole diameter of the rock layer remains unchanged. The boreholes in the coal seam section are expanded to enlarge the surface area of ​​the inner holes of the coal seam and improve the efficiency of gas overflow. The existing gas drainage drilling and reaming device and reaming method have problems such as low work efficiency, difficulty with drilling back, and low reliability. Therefore, there is an urgent need to improve the existing drilling and reaming methods and devices. Summary of the invention [0003] In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/28E21B7/18E21B10/32E21B3/02E21B17/22
CPCE21B3/02E21B7/18E21B7/28E21B10/322E21B17/22
Inventor 魏建平姜琬李辉徐向宇刘勇温志辉王登科张健司磊磊李波张宏图姚邦华
Owner HENAN POLYTECHNIC UNIV
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