Long-distance directional drill construction method

A technology of directional crossing and construction methods, which is applied in directional drilling, drilling equipment and methods, earthwork drilling and production, etc., which can solve the problems of equipment tonnage selection technical level, construction technical difficulty control and lack of experience in construction measures, etc., to reduce crossing construction Risk, Cost Savings, Effects of Early Completion Time

Inactive Publication Date: 2018-05-25
CHINA MCC 2 GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the long-distance, large-diameter crossing project, there is a lack of experience in terms of equipment tonnage selection, construction personnel technical level, construction technical difficulty control, construction measures, etc.

Method used

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Embodiment Construction

[0032] The technical solutions of the present invention will be described in detail below with reference to exemplary implementations. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

[0033] Such as figure 1 Shown is the position relationship diagram between the crossing track and the river course in the present invention.

[0034] The crossing track 2 is located below the river channel 1 and the ground, and the long-distance directional crossing construction method is carried out on the crossing track 2.

[0035] The present invention will be described in detail below by taking the river crossing 1 as an example.

[0036] Such as figure 2 Shown is the cross-sectional view of the horizontal directional drill...

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Abstract

The invention discloses a long-distance directional drill construction method. The long-distance directional drill construction method includes the steps that guide drilling is carried out according to a drill path, and the mud pressure and balance and stability of discharge capacity are maintained during drilling; holes are expanded; the concentration of mud and the mud pressure are observed in real time when the holes are expanded to enable the pressure in the holes acted by the mud to be larger than the pressure in the holes acted by hole wall; the holes are cleaned; the viscosity of the mud maintains by above 55s when the holes are cleaned, and a sand carrying agent is added in the mud; and a hole-in angle of pipelines are regulated to keep consistent with an earth-out angle, and conduits are pulled back. According to the long-distance directional drill construction method, long-distance and large-diameter directional drill smooth construction can be achieved.

Description

technical field [0001] The invention relates to a construction method, in particular to a long-distance directional crossing construction method. Background technique [0002] As one of the five major transportation methods, pipeline transportation has become the first choice for transporting oil, natural gas and ore pulp due to its advantages of high efficiency, energy saving, safety, and economy compared with the other four transportation methods: railway, highway, aviation, and water transportation. At present, my country has built pipelines of 6×10 4 km, and it is planned that in the next few years, we will continue to vigorously introduce foreign energy resources, and build more than 10 transmission pipelines. By then, the long-distance pipeline will reach more than 10,000 kilometers, forming a pipeline transportation network, which indicates that my country is about to usher in Peak period of pipeline construction. [0003] At present, the laying of pipeline projects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B7/28E21B21/08E21B21/00
CPCE21B7/04E21B7/28E21B21/00E21B21/08
Inventor 陈志刚吴刚冯永京刘宁茹国忠邵晓东
Owner CHINA MCC 2 GRP CO LTD
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