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Drilling automatic deviation correction method in deep hole drilling in coal field drilling

An automatic deviation correction and deep hole technology, which is applied to the automatic control system of drilling, directional drilling, earthwork drilling and production, etc., can solve the problems of delayed construction period, complicated deviation correction process, high project cost, etc., and achieve the effect of improving drilling quality

Pending Publication Date: 2022-05-13
HUAIBEI MINING GRP EXPLORATION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the deflection of the drill pipe in the existing structure, the correction process is complicated, which wastes time and delays the construction period; filling the cheap space results in excessive concrete consumption and high project costs

Method used

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  • Drilling automatic deviation correction method in deep hole drilling in coal field drilling

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of borehole automatic correction method in deep hole drilling of coal field drilling, such as figure 1 As shown, the deviation correction method includes the following steps:

[0052] S1. Site leveling

[0053] Ensure that the site is flat, so that the reserve mud is 1-2m higher than the construction water level, and prevent the hole from collapsing due to the pressure inside the hole being lower than the pressure outside the hole during the drilling process;

[0054] S2. Determine the hole position

[0055] After confirming the drilling position, move the drilling machine to the construction position;

[0056] S3. Set up the drilling rig platform

[0057] The center of the wire rope operating the drilling rig should be aligned with the center of the pile;

[0058] S4. The drilling rig is in place and corrected

[0059] After the drilling rig is in place, it is corrected, and the base is flat and stable to ensure that no inclination and displacement occur du...

Embodiment 2

[0071] A kind of borehole automatic correction method in deep hole drilling of coal field drilling, such as figure 1 As shown, the deviation correction method includes the following steps:

[0072] S1. Site leveling

[0073] Ensure that the site is flat, so that the reserve mud is 1.82m higher than the construction water level, and prevent the hole from collapsing due to the pressure inside the hole being lower than the pressure outside the hole during the drilling process;

[0074] S2. Determine the hole position

[0075] After confirming the drilling position, move the drilling machine to the construction position;

[0076] S3. Set up the drilling rig platform

[0077] The center of the wire rope operating the drilling rig should be aligned with the center of the pile;

[0078]S4. The drilling rig is in place and corrected

[0079] After the drilling rig is in place, it is corrected, and the base is flat and stable to ensure that no inclination and displacement occur du...

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Abstract

The invention relates to the field of coal field drilling, in particular to an automatic drilling deviation correcting method in deep hole drilling in coal field drilling, which comprises the following steps: S1, ensuring the flatness of a field, enabling stored slurry to be higher than the construction water level, and preventing hole collapse caused by the fact that the pressure in a hole is smaller than the pressure outside the hole in the drilling process; s2, after the drilling position is confirmed, a drilling machine is moved to the construction position; s3, operating the center of a drilling machine lifting steel wire rope to correspond to the center of a standard pile; s4, the drilling machine is corrected after being in place, a base is flat and stable, it is guaranteed that inclination and displacement do not occur in the drilling process, and the stability of the drilling tool and the drilling quality in the drilling process are guaranteed; s5, before hole forming, a perpendicularity monitoring system and a drill bit deviation rectifying system are installed, and hole forming operation is conducted after automatic deviation rectifying; s6, after the holes are cleaned, the drilled holes are subjected to staged hole forming quality inspection; and S7, grouting is conducted in the hole, and drilling is completed. Before a hole is formed, the drill bit correction system corrects the perpendicularity of the drill rod to be within a normal range, automatic correction is achieved in the drilling process, and the drilling quality is improved.

Description

technical field [0001] The invention relates to the field of coalfield drilling, in particular to an automatic drilling deviation correction method in coalfield drilling and deep hole drilling. Background technique [0002] Drilling verticality is one of the key factors to control the drilling quality, so how to provide a device and method that can ensure the verticality of the drilling hole, monitor the verticality of the drill pipe in real time, and correct the deviation of the drill pipe in time to meet the requirements of the construction site Its increasing demand is a technical problem to be solved urgently by those skilled in the art. [0003] Generally speaking, during the drilling process, when encountering situations such as inclined hard surfaces or uneven hard and soft formations, the force on the drill bit will be uneven, which will make the drill bit deviate to drill to one side. The inclination of the drilled hole is greater than the design and specification ...

Claims

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Application Information

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IPC IPC(8): E21B7/10E21B44/02E21B47/022E21B47/08E21B47/00
CPCE21B7/10E21B44/02E21B47/022E21B47/08E21B47/00
Inventor 周斌乔木年宾李达明王超郭阳阳
Owner HUAIBEI MINING GRP EXPLORATION ENG
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