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Drilling equipment capable of reinforcing well wall and use method thereof

A drilling and equipment technology, applied in the fields of drilling equipment and oil drilling equipment, can solve problems such as well wall instability, inability to strengthen the well wall, collapse, etc., and achieve the effects of easy operation, enhanced stability, and improved speed and quality

Inactive Publication Date: 2021-07-23
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some complex formations, the surrounding rock mass has been broken when the drill bit is drilling, and the well wall will become unstable and collapse after the drill bit is lifted up and before the casing is lowered, which cannot play the role of strengthening the well wall

Method used

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  • Drilling equipment capable of reinforcing well wall and use method thereof
  • Drilling equipment capable of reinforcing well wall and use method thereof
  • Drilling equipment capable of reinforcing well wall and use method thereof

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Experimental program
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Effect test

Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing.

[0038] Such as Figure 1 to Figure 4 Shown, a kind of drilling equipment capable of reinforcing the borehole wall includes a bottom drill bit 1, a lower drill collar 2, a middle drill pipe 3 and an upper derrick 4;

[0039] The drill bit 1 includes a disc-shaped main body 101, and a plurality of cutting edges 102 are evenly distributed along the circumference of the disc-shaped main body 101. One end of the cutting edge 102 is fixed near the center of the disc-shaped main body 101, and the other end extends out of the disc-shaped The surface where the main body 101 is located; the disc-shaped main body 101 between adjacent cutting edges 102 is provided with a chip outlet 103, and the chip outlet 103 is a through hole through the upper and lower end surfaces of the disc-shaped main body 101;

[0040] Such as figure 2 , Figure 9 As shown, the drill collar 2 is connected ...

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Abstract

The invention relates to drilling equipment capable of reinforcing the well wall and a use method thereof. The mode that an inner drill pipe and an outer sleeve are combined is adopted, rock blocks which are excavated through a bottom drill bit are cut by a cutting edge, then enter a drill collar through a gap between an inner disc and an outer disc, are cut again by a cutting blade in the drill collar and then are spirally conveyed upwards into the inner drill pipe through a conveying blade, as the rock blocks are continuously conveyed upwards, the rock blocks in the inner drill pipe are continuously accumulated, finally, the rock blocks are discharged through a chip removal mechanism, when the bottom drill bit reaches a target layer, the inner drill pipe is pulled away from the bottom drill bit, the outer sleeve is reserved to support the well wall, a traditional drilling mode that excavation is performed first and then the well wall is reinforced is abandoned, excavation and well wall reinforcement are performed at the same time, and the stability of the well wall is effectively enhanced. The use method of the drilling equipment has the advantages of simple and convenient steps and easiness in operation, and the drilling speed and quality are increased.

Description

technical field [0001] The invention relates to a drilling equipment, in particular to a drilling equipment capable of reinforcing well walls and a method for using the drilling equipment, belonging to the technical field of petroleum drilling equipment. Background technique [0002] The problem of wellbore stability is a difficult problem often encountered in the process of oil drilling. With the continuous expansion of exploration and development fields, the formation conditions encountered are becoming more and more complex, and the problem of wellbore instability is also more prominent, which seriously affects the drilling speed. and quality. [0003] In the prior art, the reinforcement of the borehole wall is generally performed after the borehole is excavated, and then the casing is injected, and then cement slurry is injected around the casing to protect the borehole wall. However, in some complex formations, the surrounding rock mass has been broken when the drill b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B3/02E21B19/00E21B17/00E21B17/08E21B17/04E21B10/43E21B33/13E21B15/00
CPCE21B7/005E21B3/02E21B19/00E21B17/00E21B17/08E21B17/042E21B10/43E21B33/13E21B15/00E21B17/22E21B7/201
Inventor 陈定超于洋韩雨珩梁燕翔赵祥岍潘雨欣
Owner XUZHOU UNIV OF TECH