Coiled tubing drilling polishing horizontal section cement plug downhole tool combination and technology

Abstract

The invention discloses a coiled tubing drilling polishing horizontal section cement plug downhole tool combination, comprising a coiled tubing, a coiled tubing connector, a plug detecting tool string or a drilling polishing tool string. When using the coiled tubing drilling polishing horizontal section cement plug downhole tool combination provided by the invention, the size of the tool string can be changed flexibly according to the size of the well, so as to meet the drilling polishing requirement of small well. Meanwhile, the tool combination can penetrate through the well section with large dogleg degree and steps and can be used for the drilling polishing of the cement plug with long horizontal section, therefore the application range is wider. The continuous drilling is realized, the drill blocking risk during the drilling polishing process is reduced effectively, and the working efficiency is improved. In addition, by utilizing the coiled tubing, the drilling polishing works of well with pressure, in particular to the well with higher pressure after being drilled can be implemented. The invention further discloses a coiled tubing drilling polishing horizontal section cement plug technology using the coiled tubing drilling polishing horizontal section cement plug downhole tool combination.

Description

technical field [0001] The present invention relates to the technical field of cement plug drilling and grinding, and more specifically, relates to a downhole tool combination for drilling and grinding a horizontal section of a coiled tubing cement plug, and also relates to a coiled tubing using the downhole tool combination for drilling and grinding a horizontal section of a coiled tubing cement plug Drilling and grinding of cement plugs in the horizontal section. Background technique [0002] Cement plug drilling and grinding is a common technology in the field of drilling and workover in the oil and gas industry. In recent years, with the continuous improvement of drilling technology and the continuous improvement of oil production requirements, horizontal wells, highly deviated wells, and lateral wells have appeared one after another, and have gradually been recognized by more people, and more and more have been popularized and applied. . Among them, a horizontal well ...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the first object of the present invention is to provide a downhole tool assembly for drilling and grinding the cement plug in the horizontal section of the coiled tubing, which can effectively solve the process of drilling and grinding the cement plug in the horizontal section. Problems of easy drill sticking, high equipment operation cost, low comprehensive benefit and poor applicability

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