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Gathering and transportation pipeline directional drilling bundling laying construction method

A construction method and directional drilling technology, which are applied in drilling equipment and methods, directional drilling, pipeline laying and maintenance, etc., can solve the problems of large crossing area and long construction period, etc.

Active Publication Date: 2020-10-23
SINOPEC NANJING ENG & CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a construction method for directional drilling cluster laying of gathering pipelines, which is used to solve the problems of the existing multi-pipe parallel directional drilling crossing of the existing gathering pipelines, which takes up a lot of land and has a long construction period, so as to reduce the crossing and improve the construction efficiency. Construction efficiency, reduce construction cost

Method used

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  • Gathering and transportation pipeline directional drilling bundling laying construction method
  • Gathering and transportation pipeline directional drilling bundling laying construction method
  • Gathering and transportation pipeline directional drilling bundling laying construction method

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The construction flow chart of an embodiment of the present invention is as figure 1 As shown, the directional drilling cluster laying construction method of the gathering and transportation pipeline in this embodiment is carried out according to the following steps. First, the site cleaning operation is carried out before the steel casing prefabrication installation step and the horizontal directional drilling crossing step, specifically for the horizontal directional drilling Level the positions of the exit and entry points of the drilling rig, clean up the steel casing and the pipeline site that needs to be bundled and dragged back, and make sure that the working belt and the pipeline directional drilling are crossed in a straight line. The trajectory of the excavation point is straight and straight.

[0031] Then it also includes ...

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Abstract

The invention discloses a gathering and transportation pipeline directional drilling bundling laying construction method, and belongs to the technical field of gathering and transportation pipeline trenchless crossing. In the gathering and transportation pipeline directional drilling bundling laying construction method provided by the invention, firstly, dragging back a steel sleeve through a modeof horizontal directional drilling, then, a gathering and transportation pipeline is enabled to pass through in the steel sleeve through a mode of gathering and transportation, thus, trenchless crossing of the gathering and transportation pipeline is completed, further, a gap between the steel sleeve and the gathering and transportation pipeline is fully filled with grout, and finally, a weldinghead connection work for the gathering and transportation pipeline is completed. The construction method provided by the invention can drag back the gathering and transportation pipeline through the mode of gathering and transportation, thus, a work of passing through a river can be realized successfully, the whole dragging back and passing through process is smooth, a drag-back sleeve is connected with a cardan joint, a pipe bundle is guaranteed to be not twisted in the steel sleeve, the gathering and transportation pipeline and the sleeve are consistent in a guiding curve, an anti-corrosionlayer of the gathering and transportation pipeline is not liable to be damaged, after dragging back and passing through, the gap between the steel sleeve and the bundling pass-through gathering and transportation pipeline is filled with cement grout so as to be solid, and safety during a period of pipeline operating is guaranteed more.

Description

technical field [0001] The invention relates to a construction method for directional drilling and cluster laying of gathering and transportation pipelines, which belongs to the technical field of non-excavation crossing of gathering and transportation pipelines. Background technique [0002] As the country vigorously builds the oil and gas pipeline transmission network, the "trenchless" crossing technology is also constantly developing and improving. Pipelines and high-pressure natural gas are often laid in the same ditch, but when laying multiple pipes in the same ditch to cross rivers, especially when crossing navigable rivers, it is impossible to use excavation or erect trusses to cross the way. Horizontal directional drilling can solve this problem in the prior art However, the simultaneous drilling of multiple pipes is limited by the horizontal distance between the directional drilling pipes. When laying multiple pipes in the same ditch, crossing obstacles such as rive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/036F16L1/06E21B7/04E21B7/28E21B21/00E21B33/13
CPCF16L1/036F16L1/06E21B7/046E21B7/28E21B21/00E21B33/13Y02E10/20
Inventor 王志芳高义斌王京智许金生王爱民
Owner SINOPEC NANJING ENG & CONSTR
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