Well blowout preventer mounted in drilling column and automatically controlled in well
A blowout preventer and drill string technology, which is applied in wellbore/well components, earthwork drilling, sealing/packing, etc. Comprehensive technical and economic benefits, saving operating costs, and reliable work
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[0013] The present invention will be further described below with reference to the drawings and embodiments.
[0014] The downhole blowout preventer consists of the drilling tool slide valve assembly and the main body of the downhole blowout preventer, such as figure 1 Shown. The spool valve assembly of the drilling tool is composed of a spool valve connector 1, a spool valve seat 6, and a spool valve body 7. The spool valve connector 1 is processed with two-stage shoulders, one is used to position and limit the spool valve body 7 7's down stroke. One is used to install the spool valve seat 6 during the initial connection. The upper ring of the spool valve seat 6 is machined with a tapered hole, and a certain number of elastic elements are installed on its periphery to facilitate close contact with the inner wall of the drill string, such as figure 2 Shown. The upper part of the spool valve body 7 is a conical cylinder composed of multiple arcs and straight lines to facilitate ...
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