Pipeline inner wall supporting device of limiting double-layer self-adaptive three-point umbrella type

Abstract

The invention relates to the technical field of devices for removing waste offshore drilling well pipes and drilling platform supporting vertical pipes, in particular to a pipeline inner wall supporting device of a limiting double-layer self-adaptive three-point umbrella type. The pipeline inner wall supporting device is characterized by comprising an upper layer three-point axial guide supporting mechanism and a lower layer three-point guide supporting mechanism. Three-point umbrella type crank block supporting mechanisms are arranged on the three-point axial guide supporting mechanisms, and a driving mechanism is arranged on the upper layer three-point axial guide supporting mechanism. By the adoption of the two layers of self-adaptive three-point umbrella type pipeline inner wall supporting mechanisms, the whole mechanisms have the good axial guide performance and can be stable and reliable in upward sliding inside a pipeline along the pipe wall. Three connecting rod supporting arms drive three supporting connecting rod arms to be unfolded in the radius direction in a self-centering mode, therefore, the requirements for different tightening force and the inner diameter of the inner wall of the pipeline are met, and the corresponding tightening force and the size of the inner diameter of the inner wall of the pipeline can be acquired through a control algorithm. The pipeline inner wall supporting device is convenient to use, safe and high in adaptability.

Description

Technical field: [0001] The invention relates to the technical field of cutting equipment used for discarded offshore drilling well pipes and their drilling platform support standpipes, in particular to a dual-layer self-adaptive three-point umbrella-type pipe inner wall support device with a limit. Background technique: [0002] In the prior art, the traditional treatment method is adopted for the discarded offshore drilling well pipes and their drilling platform support risers: completely discarded, and the existing problem is that the abandoned pipes in the offshore will affect the safety of marine traffic; artificial methods are used along the The outer wall of the discarded pipe is removed. The problem is that the removal efficiency is low and it is impossible to remove it completely. Generally, there will be residues under the water, which will also affect the safety of marine traffic. The problem of removing it by blasting is that It will affect the ecology and pollut...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the traditional treatment method is adopted for the discarded offshore drilling well pipes and their drilling platform support risers: completely discarded, and the existing problem is that the abandoned pipes in the offshore will affect the safety of marine traffic; artificial methods are used along the The outer wall of the discarded pipe is removed. The problem is that the removal efficiency is low and it is impossible to remove it completely. Generally, there will be residues under the water, which will also affect the safety of marine traffic. The problem of removing it by blasting is that It will affect the ecology and pollute the environment; at present, the relevant national departments of our country require that the abandoned pipes in the offshore must be removed above 3m underwater without polluting the environment. The traditional method can no longer meet the requirements.

Especially it is difficult to support and locate when the waste pipeline is cut

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