Great drop mountain directional drilling crossing construction method

A technology of directional drilling traversing and construction methods, applied in directional drilling, drilling equipment and methods, drilling equipment, etc., which can solve problems such as large drop, difficulty in obtaining sufficient mud supply, and difficulty in timely discharge of rock debris

Inactive Publication Date: 2018-01-19
CHINA NAT CHEM ENG NO 14 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the directional drilling construction process, it is necessary to ensure that sufficient mud is exposed in the formed hole. In the traditional directional drilling construction process, the height difference between the entry position and the excavation position is small, so the mud can be evenly distributed in the hole. During the construction of directional drilling in mountains with a large drop, due t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A construction method for directional drilling through a mountain with a large drop, which includes the following process steps:

[0020] 1) Determine the entry position and the excavation position, and drill through the drilling tool along the entry position to the excavation position to realize the construction treatment of the pilot hole;

[0021] 2) Return the drilling tool from the excavated position to the excavated position, and replace the drilling tool with the reaming equipment, and then use the reaming equipment to drill along the excavated position to the unearthed position to realize the reaming construction process.

[0022] 3) In the hole where the reaming construction process has been completed, the pipeline to be laid is placed inside the hole along the dragging direction from the excavation position to the entry position under the dragging of the reaming equipment.

[0023] As an improvement of the present invention, the height of the buried position i...

Embodiment 2

[0028] As an improvement of the present invention, in the step 1), a mud pit is set at the soil entry position, and the mud generated at the soil entry position during the drilling of the pilot hole is introduced into the mud pit; the mud in the mud pit is recycled. Finally, it is stored in the mud tank, and the mud in the mud tank is exported by the mud pump to drive the drilling tool to move. By adopting the above technical solution, it can effectively recycle and process the mud generated at the buried position, so as to provide good driving force for the drilling tool.

[0029] As an improvement of the present invention, in the step 2), a mud pit is set at the unearthed position, and the mud generated at the unearthed position during the reaming drilling process is introduced into the mud pit; the mud in the mud pit is recycled. Finally, it is stored in the mud tank, and the mud in the mud tank is exported through the mud pump and the reverse conveying pipeline, and then t...

Embodiment 3

[0032] As an improvement of the present invention, in the step 2), the mud exported from the mud tank is driven towards the guide hole in real time with the position of the reaming device in the guide hole while driving the reaming device to move . By adopting the above technical scheme, it can provide real-time mud supply inside the pilot hole when the drilling tool and reaming equipment are working under the mud drive, thereby enabling the removal of rock debris in the borehole and lubrication in the borehole The treatment effect can be improved.

[0033] The remaining features and advantages of this embodiment are the same as those of Embodiment 2.

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PUM

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Abstract

The invention discloses a great drop mountain directional drilling crossing construction method, comprising the following process steps: 1) determining a soil coming-in position and a soil coming-outposition, through a drilling tool, drilling along the direction from the soil coming-in position to the soil coming-out position, to realize construction processing of a guide hole; 2) withdrawing thedrilling tool along the direction from the soil coming-out position to the soil coming-in position, after the drilling tool is changed to a hole expanding device, through the hole expanding device, drilling along the direction from the soil coming-in position to the soil coming-out position, to realize hole expanding construction processing; 3) in the hole in which hole expanding construction processing is completed, placing a pipe which is to be laid in the hole along a drag direction from the soil coming-out position to the soil coming-in position, the pipe being dragged by the hole expanding device. Compared with a conventional directional drilling process, in the great drop mountain directional drilling crossing construction method using the above technical scheme, pushing processingof the hole expanding device from the soil coming-in position to the soil coming-out position is used in a hole expanding stage, control of a guide curve in an operation process can be effectively improved, so that a hole expanding path tends to be a line, and hole expanding precision is improved.

Description

technical field [0001] The invention relates to the field of geotechnical and geological engineering, in particular to a construction method for directional drilling and crossing of a mountain with a large drop. Background technique [0002] Directional drilling, as a major non-excavation technology, has been widely used in complex terrain projects such as various pipelines crossing rivers, highways, railways and mountains. During the directional drilling construction process, it is necessary to ensure that there is enough mud exposed in the forming hole. In the traditional directional drilling construction process, the height difference between the entry position and the excavation position is small, so the mud can be evenly distributed in the hole. During the construction of directional drilling in mountains with a large drop, due to the large drop between the unearthed position and the buried position, it is difficult to obtain sufficient supply of mud inside the hole, wh...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B21/00E21B7/28E21B21/06
Inventor 焦赞褚堂清陆燕
Owner CHINA NAT CHEM ENG NO 14 CONSTR
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