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Novel grouting drill pipe and use method thereof

A drill pipe and grouting technology, applied in drill pipe, drill pipe, drilling equipment and other directions, can solve problems such as engineering waste, and achieve the effects of ensuring construction safety, reducing construction costs and reducing investment.

Pending Publication Date: 2021-06-18
北京大地高科地质勘查有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When grouting formation fractures in existing drilling projects, drilling tools can be used for grouting, avoiding drilling and sweeping holes, and reducing engineering costs; when grouting in sections, it can not only optimize the grouting effect, but also directly solve the problem of grouting Various engineering waste problems caused by hole scanning

Method used

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  • Novel grouting drill pipe and use method thereof
  • Novel grouting drill pipe and use method thereof
  • Novel grouting drill pipe and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0046] As an embodiment of the present invention, the grouting method includes two methods:

[0047] ①Advance grouting, specifically, after drilling a certain distance, the drill is pulled out, a new type of grouting drill pipe is lowered, the air bag 10 is inflated to the design pressure, grouting is performed on the target hole section, and the drill pipe is pressed by water after grouting. The inner grout is replaced, the new grouting drill pipe is pulled out, the drill is lowered and the drilling is continued, and the above steps are repeated to complete the grouting of the entire borehole.

[0048] ②Backward grouting, specifically, the drilling is completed at one time. After drilling to the design hole depth, the drill is pulled out. After the grouting hole section is determined, a new type of grouting drill pipe is lowered, and the air bag 10 is inflated to the design pressure. Grouting, pressurize water after grouting to replace the slurry in the drill pipe, connect th...

Embodiment example

[0050] In the actual operation of the forward and backward grouting methods, the operation steps used in the present invention are the same, so this time the 1600m hole depth is used as an example to describe, and the casing depth is 800m, and the grouting hole section is selected to be 1500-1600m.

[0051] Step 1: After drilling to the target hole section, select the grouting hole section, and pull out all the drill pipes in the hole.

[0052] Step 2, the sealing area is 700m-1500m, and 800m is selected for description this time. Select the number of three-stage grouting drill pipes, connect and install them, and run them one by one; determine the orientation when running in, that is, the side of the three-stage grouting drill pipe with wear-resistant rubber must be at the bottom of the horizontal section hole,

[0053] Step 3: After the previous drill pipe is lowered into the hole, it is stuck on the slips of the operating table. After the power head lifts the next drill pip...

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Abstract

The invention relates to the technical field of grouting in drilling engineering, in particular to a novel grouting drill pipe and a use method thereof. The novel grouting drill pipe comprises a sealing rod head 1, a first-stage grouting drill pipe 2, a second-stage grouting drill pipe 3 and a third-stage grouting drill pipe 4, wherein a detachable grouting joint is installed on the side part of the sealing rod head 1; a through hole is formed in the side part of the upper section of the first-stage grouting drill pipe 2, and a compressed air pipe penetrates through the through hole and is installed on a buckle; the second-stage grouting drill pipe 3 and the internal compressed air pipe are connected through an inner buckle; and the three-stage grouting drill pipe 4 is divided into two compressed air pipes, a single compressed air pipe is arranged in the last section of the drill pipe, and an air bag is installed outside the drill pipe through a toggle clip. During engineering construction, a reasonable grouting mode is selected, grouting can be performed on a target hole section, and the problem of poor grouting effect during whole-section grouting of drilling engineering is directly solved; during segmented grouting, the problems of continuous tripping-out and tripping-down, new hole formation during hole sweeping and depreciation and abrasion of equipment due to hole sweeping are solved; and the engineering efficiency is improved, the construction cost is reduced, and the construction safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of drilling engineering grouting, and in particular relates to a novel grouting drill pipe and a using method thereof. Background technique [0002] At present, more and more drilling engineering combined with grouting technology is applied to the sealing and strengthening of formation fractures, such as formation primary fractures, mining fractures, geological fracture zones, formation soft rocks, weak formations under complex structural conditions, etc. When grouting the above-mentioned strata, it is necessary to pull out all the drill pipes on the ground, connect the grouting pump pipeline from the wellhead, and perform grouting in the whole hole section. [0003] Problems existing in formation grouting in existing drilling engineering: [0004] 1. At present, when one-time full-section grouting is used, due to the large holes and deep holes in the drilling engineering, it is difficult to judge which sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B17/00E21B33/134E21B23/01E21B17/02
CPCE21B33/13E21B17/00E21B33/134E21B23/01E21B17/02
Inventor 顾玉明张彪黄辅强袁云星李红叶李云鹏毕琳
Owner 北京大地高科地质勘查有限公司
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