Drill string equipped with downhole blowout preventer and working method thereof
A blowout preventer and drill string technology, which is applied in drill pipe, drill pipe, earthwork drilling, etc., can solve the problems of not being able to play early warning and blowout prevention, increasing the downhole annular pressure difference, slow signal transmission, etc. Achieve the effect of fast transmission speed, prevention of blowout accidents, and simple and feasible method
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[0043] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0044] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0045] The drill string that the downhole blowout preventer of the present invention is installed, as figure 1 , figure 2 with image 3As shown, a drill bit 1 is arranged on the drill string body, and a downhole blowout preventer 3 is arranged on the drill string body, and the downhole blowout preventer 3 is installed at a position above the neutral point of the drill string body. According to actual needs, choose not to install above the ...
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