Thrust auxiliary reamer bit

A technology for reaming drill bits and drill bits, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of unguaranteed aperture quality and small application range of drill bits, and achieve the effects of simple structure, safe and reliable performance, and convenient use.

Inactive Publication Date: 2011-08-17
PINGDINGSHAN WUHUAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the prior art that the drill bit has a small applicatio

Method used

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Example Embodiment

[0014] For the specific structure of the present invention, please refer to the attached figure 1 Or attach figure 2 . The force-push auxiliary reaming drill bit includes a drill rod 1, a multi-wing reamer 2 and a drill bit 3, and the three are connected in sequence. It is characterized in that a force-pushing device 4 is added between the reamer 2 and the drill bit 3. Driven by the drill bit 1 and the force pushing device 4, the present invention can better complete the function of drilling and reaming.

[0015] Because the reamer 2 and the force pushing device 4 of the present invention are of an integrated structure, that is, they are connected by a cylinder sleeve, which increases the length of the drill bit 3, and thus has a centralizing and guiding function, which can ensure the required hole reaming Quality requirements for aperture size.

[0016] The specific movement mode of the present invention is jointly completed by the drill rod 1, the multi-wing reamer 2, the forc...

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Abstract

The invention relates to a thrust auxiliary reamer bit which comprises a drill rod (1), a multi-blade reamer (2) which is connected to a forcing device (4) and a cylinder (5) to form a whole, and a drill bit (3), all the parts being connected in sequence. The invention is characterized in that the forcing device (4) is a fluid piston type and formed by the cylinder (5), a piston (6) and a piston rod (1) arranged in the cylinder, the piston (6) is fixed on one end of the piston rod (7), the other end projects the cylinder (5) and fixes a taper forcing head (10); an air channel is arranged in a wall of the cylinder, an upper chamber air inlet/exhaust hole (11) at one end of the air channel is through in the piston chamber, an open at the other end is communicated with a Cornish bit wing air passage namely a drill rod air channel, a lower chamber air inlet hole (13) is arranged on the wall of the cylinder and is communicated with outside through the wall of the cylinder; and a reset spring (9) is sleeved on the piston rod (7) in the cylinder. The thrust auxiliary reamer bit has the advantages of simple structure, safe and reliable performance, convenience for use, capability of enlarging the bit wing in a condition of the same small caliber, and capability of solving the problems in larger-reaming-radius construction of soft rock stratums and hard rock stratums simultaneously.

Description

(1) Technical field [0001] The invention relates to a drilling and reaming device for geological drilling of coal fields, coal bed methane, and mine gas discharge wells, in particular to a forced-push auxiliary reaming drill bit. (2) Background technology [0002] In recent years, in order to improve the comprehensive utilization of coal resources and eliminate the accidents of gas endangering production safety in the process of coal mining, before coal mining, it is generally necessary to set up pre-extraction wells for coalbed methane (gas) on the construction surface, or to set up pre-extraction wells for coalbed methane (gas) in the production mine Set up gas discharge wells to extract and collect coalbed methane. During construction, it is often necessary to make local caves or expand the diameter of the coal seam well section of the coalbed methane pre-extraction well or the specific well section of the gas discharge well to increase the production of coalbed methane o...

Claims

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Application Information

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IPC IPC(8): E21B10/32E21B10/60
Inventor 彭桂湘方良才李平汪敏华赵俊峰陈功胜程合玉张士环夏壮博童碧蔡如法何善龙余熠徐坡刘克林张志罡彭颖超徐学杰白领国杜贵亭阎冠欣张耀亭彭粤湘曹伟董鹏
Owner PINGDINGSHAN WUHUAN IND
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