ENVIRONMENTALLY FRIENDLY CAPSULAR BAG-TYPE DOWNHOLE KARST CAVE BLOCKING DEVICE, AND BLOCKING METHOD THEREFOR

摘要

Disclosed is an environmentally friendly capsular bag-type downhole karst cave blocking device, relating to the field of petroleum drilling, and mainly being used to block a downhole karst cave. The device comprises mechanical parts, such as a connecting rod, hinges (309, 310, 311), springs (407, 408), a one-way valve (204), a slide rail (102), a sensor (405), a ratchet and electromagnets (402, 404) in a combined transmission manner. The automatic karst cave blocking of the whole environmentally friendly capsular bag-type downhole karst cave blocking device is realized by means of a capsular bag. Further disclosed is an environmentally friendly capsular bag-type downhole karst cave blocking method. The device and method reduce the requirements for a leakage blocking material and a drill pipe, reduce the costs and time needed for blocking a karst cave, and can be used in large karst cave and honeycomb-shaped karst carve scenarios.