Reamer separation device for non-excavation directional drilling pipeline and its construction method

Abstract

The invention discloses a reamer separation device for a non-excavation directional drilling pipeline. The reamer separation device comprises a pipe head connecting piece, a controllable transfer case and a hoop, wherein the pipe head connecting part comprises a first hollow sleeve nested outside the pipeline and a second hollow sleeve which is nested outside the first hollow sleeve and is in threaded connection with the first hollow sleeve; the controllable transfer case comprises a body connected with the second hollow sleeve, a rotating shaft lever which is mounted in the body and capable of moving in the axial direction of the body as well as an elastic piece mounted on the rotating shaft lever, a clamp groove for clamping the elastic piece is formed in the body, and when the rotating shaft lever axially moves to the position below the clamp groove, the elastic piece is accommodated in the clamp groove and the rotating shaft lever is enabled to be fixed relative to the body; the hoop comprises multiple tightening rings nested outside a drill rod and connecting rods connected with the multiple tightening rings. With the adoption of the reamer separation device, the dismounting work of a reamer and the transfer case on the pipeline becomes quite simple.

Description

technical field [0001] The invention relates to the technical field of non-excavation directional drilling construction, in particular to a reamer separation device for non-excavation directional drilling pipelines and a construction method thereof. Background technique [0002] In the construction of urban underground pipelines, trenchless directional drilling construction technology has been more and more widely used due to its advantages of no impact on road traffic, fast progress, and environmental protection. [0003] In the construction of trenchless directional drilling at a deep underground depth (greater than 3m), it is hoped that the reamer, transfer gear and other devices can be quickly disassembled from the pipeline and enter the next section of construction. There are two traditional methods, one is to accurately calculate the length of the laying pipeline, pull the reamer, transfer device and other devices just to the well positions at both ends, and then remov...

AI Technical Summary

Problems solved by technology

There are two traditional methods, one is to accurately calculate the length of the laying pipeline, pull the reamer, transfer device and other devices just to the well positions at both ends, and then remove the reamer, transfer device, etc. after the mud in the well is cleaned up The device is connected, and then the reamer, transfer case and other devices are dragged out of the ground to carry out the next section of pipeline construction. The mud needs to be cleaned during the whole process, and then it is demolished in a narrow well. The waiting time is long and the construction period is extended; Another method is to increase the welding length of the pipeline to ensure that after the completion of the pipeline laying work, the reamer, transfer device and other devices can also be pulled to the ground for disassembly. This construction method increases the pipeline loss. Will increase the construction cost

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