Compression type packer

Abstract

The compressed packer has one seat sealing mechanism comprising one locking sleeve, one locking ring, one locking ring seat and one central pipe. Inside the locking ring seat, there are wedged locking blocks with outer surface matching the inner conic surface of the locking ring, locking block support sleeve to hold the locking blocks inside the holes of the locking ring seat, return springs, andlimit stops. The central pipe has steps for pushing the limit stops to shift upwards. The compressed packer has rigid wedged locking block to replace elastic support pawls, and possesses stable and reliable seat sealing, flexible smooth and reliable locking block desterilizing, and flushing path between the central pipe and the locking block support sleeve for flushing job.

Description

technical field

[0001] The invention relates to a packing device for packing oil layers or tubing casings of oil and gas wells during the exploration and development of oil and gas fields, in particular to a compression packer which is stable in setting and unblocking completely. Background technique

[0002] At present, there is a known compression packer, the seat sealing mechanism includes a lock sleeve, a lock ring, a lock ring seat, an elastic support claw, and a central tube. In the axial groove of the lock ring seat, there is a ring groove on the outer cylindrical surface of the lower end of the lock ring seat, and the lock ring is installed in its annular groove. The annular groove is provided with a waist hole communicating with the inner axial groove. The central tube and the elastic support The contact part of the claw is provided with an outwardly protruding annular boss, which presses the end of the elastic supporting claw into the waist hole of the lock ring se...

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