A kind of anti-blowout packer
A packer and blowout prevention technology, applied in the directions of sealing/packing, wellbore/well components, earth-moving drilling, etc., to reduce the risk of pipe string slippage, prevent blowout hazards, and achieve the effect of ultra-high pressure blowout sealing
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[0011] Such as figure 1 , figure 2 and image 3 As shown, a blowout prevention packer of the present invention is composed of an upper joint 1, a locking cylinder 2, a locking mandrel 3, a locking steel ball 4, a sliding pin 5, a locking spring 6, a pushing cylinder 7, an upper spacer ring 8, Connecting cylinder 9, oil seal mandrel 10, sealing rubber cylinder 11, lower spacer ring 12, anchor claw 13, cover plate 14, anchor cylinder 15, booster piston 16, return spring 17, sealing mandrel 18, sealing steel ball 19 , The ball seat 20 and the lower joint 21 are formed; its structural features are: the upper end of the upper joint 1 is connected with the upper pipe string screw, and the lower end of the lower joint 21 is connected with the lower drill string screw; the lower part of the outer circle of the upper joint 1 is set as a stepped shaft; The upper part of the locking cylinder 2 is evenly provided with three flow holes in the circumferential direction, the middle part o...
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