Three-pass pipeline laying process

Abstract

The invention discloses a three-pass pipeline lowering process, which belongs to the technical field of well drilling pipe lowering, and comprises the following steps: fixing one ends of three casing pipes, and sleeving the other ends of the three casing pipes with hoop sleeves to obtain a casing pipe group; one of the casing sets is vertically hoisted and put into the well until the coupling sleeve is located at the well mouth, and then the upper end of the casing set is clamped and fixed through a pipe clamping device; the other casing pipe set is taken and vertically hoisted, so that the end, provided with the coupling sleeves, of the casing pipe set faces upwards, all the casing pipes of the casing pipe set are inserted into the three coupling sleeves at the wellhead in a one-to-one correspondence mode, the coupling sleeves and the corresponding casing pipes are welded and fixed, and a casing pipe combination is obtained; the pipe clamping device is loosened, the casing pipe combination body continues to be lowered to the position where the coupling sleeve at the uppermost end is located at the wellhead, and then the casing pipe combination body is clamped and fixed through the pipe clamping device again; and repeating the operations of the step 3 and the step 4. The device has the advantages that the pipe descending time can be effectively shortened, and the problem that pipe descending and pipe taking are difficult due to pipeline winding is solved.

Description

technical field [0001] The invention belongs to the technical field of drilling down pipes, in particular to a three-pass pipeline down pipe process. Background technique [0002] At present, most of the casings run in the wells are run in one trip or divided into multiple trips. Specifically, in each trip, the pipes are taken over one by one first, and then continue to the next pipeline. During the operation, due to the depth of the well, the pipeline will be bent after each trip of the pipeline, and when the next trip of the pipeline is continued, the bent pipeline will be blocked on the path of the pipeline. , which makes it difficult to get off the pipe, or the two pipelines are intertwined with each other, which makes it very inconvenient to continue to get off the pipe or take the pipe. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a three-pass pipeline down-pipe process, which effectively overcomes the d...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the casings run in most drilling wells are run in one trip or multiple trips. Specifically, each trip first takes over the pipes one by one, and then continues to the next one. During the operation, due to the depth of the well, the pipeline will be bent after each pipeline run, and when the next pipeline is run, the curved pipeline will be blocked on the pipe run path , making it difficult to run the tube, or the two pipelines are entangled with each other, which makes it very inconvenient to continue to run or take the tube

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