Non-excavation and top drilling combined crossing and spanning pipeline laying method

A laying method and non-excavation technology, applied in pipeline laying and maintenance, mechanical equipment, pipes/pipe joints/fittings, etc., can solve problems such as pipeline laying in complex strata, achieve convenient pipeline operation, long crossing distance, and prevent water gushing Effects of sand gushing accidents

Active Publication Date: 2017-04-26
CHINA PETROCHEMICAL CORP +3
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the existing technology, the present invention provides a method for laying pipes with a combination of trenchless top drilling and horizontal directional drilling, which can solve the problem of laying large-diameter and long-distance pipelines in complex formations in combination with pipe jacking and horizontal directional drilling rig technology

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  • Non-excavation and top drilling combined crossing and spanning pipeline laying method
  • Non-excavation and top drilling combined crossing and spanning pipeline laying method
  • Non-excavation and top drilling combined crossing and spanning pipeline laying method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with drawings and embodiments.

[0034] The invention provides a method for laying a non-excavation drill roof combined crossing and spanning pipeline, which includes the following steps:

[0035] (1) According to geological survey data and pipeline design data, respectively select sections suitable for horizontal directional drilling rig technology and pipe jacking technology, and select the positions of pipe jacking working wells and receiving wells;

[0036] (2) The pipe jacking working well and the receiving well are completed, so that the depth of the pipe jacking working well and the receiving well is the same;

[0037] (3) Water injection 5 to the receiving well, pipe jacking construction and horizontal directional drilling rig construction are carried out simultaneously, so that the position to be laid at the bottom of the receiving well is opened; wherein, the horizontal directional drilling r...

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Abstract

The invention provides a non-excavation and top drilling combined crossing and spanning pipeline laying method. The method comprises the steps of carrying out pipe-jacking construction and horizontal directional drilling construction at the same time; getting through the position, where pipelines are to be laid, at the bottom of a receiving shaft; then, enabling the pipelines to communicate with each other; and finally, carrying out backfilling, so as to achieve pipeline laying. According to the method, the part, difficult to construct through a horizontal directional drilling machine, of a pipeline construction zone of a complex stratum is selected as a pipe-jacking construction section, other complex stratums are adopted as horizontal directional drilling machine construction parts according to reconnaissance information, the one-time crossing distance is long, the constructable pipe diameter is large, large-diameter long-distance pipelines can be laid in the complex stratums through one step, construction cost is greatly reduced, and construction time is greatly saved.

Description

technical field [0001] The invention relates to a method for laying a non-excavation drill-roof combined crossing and spanning pipeline, which belongs to the field of non-excavation engineering. Background technique [0002] With the rapid development of my country's economy, the demand for energy continues to increase, the demand and size of new pipelines are also increasing, and the geological conditions of pipeline construction are becoming more and more complex. The traditional horizontal directional drilling rig pipeline crossing technology has a long one-time construction pipeline length, but requires relatively stable geological conditions; the traditional pipe jacking technology has better stratum adaptability, but the one-time jacking distance cannot be too long, and the segmented jacking will Increasing the number of working wells will greatly increase the cost and time of construction. Therefore, for the laying of long-distance and large-diameter pipelines in com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/028
CPCF16L1/028
Inventor 付超阎庆华曾聪马保松袁勇贾春磊王孝兵张茂磊潘月宇刘鹏
Owner CHINA PETROCHEMICAL CORP
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