A Construction Method for Gathering and Transportation Pipeline Directional Drilling and Cluster Laying

Abstract

The invention discloses a construction method for directional drilling and cluster laying of a gathering and transportation pipeline, which belongs to the technical field of non-excavation crossing of the gathering and transportation pipeline. The construction method of directional drilling and cluster laying of gathering and transportation pipelines in the present invention first drags back the steel casing by means of horizontal directional drilling, and then passes the gathering and transportation pipelines into the steel casing by adopting a clustering method, thereby completing the non-opening of the gathering and transportation pipelines. Dig through, then fill the gap between the steel casing and the gathering and transportation pipeline with slurry, and finally complete the welding joint work of the gathering and transportation pipeline. The construction method of the present invention can smoothly achieve the work of dragging the collection and transportation pipelines back and crossing the river in a bundled manner, the whole process of dragging back and crossing is smooth, and the dragging sleeve is connected with the universal joint to ensure that the tube bundle does not twist in the steel casing The gathering pipeline is consistent with the guide curve of the casing, and the anti-corrosion layer of the gathering pipeline is not easily damaged. After the pullback crossing, cement grout is used to fill the gap between the steel casing and the gathering pipeline crossed by the cluster, which further ensures the safety of the pipeline during operation. safety.

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...

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

Images