Insertion-pipe-type waterproof production packer and working method thereof

Abstract

The invention discloses an insertion-pipe-type waterproof production packer and a working method thereof. The upper end of an insertion pipe is connected with an insertion pipe joint, a gap is formedbetween a center pipe and the insertion pipe, the center pipe and the insertion pipe are provided with overcurrent holes, insertion pipe sealing mechanisms are arranged at the upper and of the insertion pipe and the lower end of the center pipe, an unblocking device is arranged in the upper setting sealing mechanism, the upper setting sealing mechanism and a lower setting sealing mechanism are connected through an anchoring mechanism, and the upper setting sealing mechanism, the unblocking mechanism, an upper rubber cylinder, the anchoring mechanism, a lower rubber cylinder, the lower settingsealing mechanism and a releasing mechanism sleeve the center pipe in sequence from top to bottom. According to the insertion-pipe-type waterproof production packer, after isolated production is completed, an upper pipe column can freely lift and fall by inserting and extracting the insertion pipe, the problem that after conventional isolated production, when pump inspection or measure work is conducted, the packer needs to be deblocked and pulled out is solved, the setting sealing effect on the packer is obviously improved, the corrosion resistance of slips is effectively improved, the frequency of isolated production treatment is reduced, and the isolated production validity period is prolonged.

Description

technical field [0001] The invention belongs to the technical field of casing damage well treatment in oilfields, and in particular relates to an intubation-type water-resisting oil recovery packer and a working method thereof. Background technique [0002] At present, most of the production strings used for isolation production after oil well casing damage use conventional packers such as Y111, Y211, and Y221. This packer can realize the drilling and completion of the production string in one trip. Sealing characteristics can meet the isolation demand of some wells. However, this kind of isolation string cannot replace the upper part of the packer, and the packer needs to be unsealed and taken out first when the pump is checked or the measures are taken. , Due to the aging of the seal, the deformation of the rubber cylinder and the corrosion of the slips, the validity period of the packer is shortened, resulting in frequent mining isolation and increasing the treatment cos...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an intubation-type water-resisting oil recovery packer and its working method to solve the problem of low success rate of setting of the existing water-resisting oil recovery packer for the deficiencies in the above-mentioned prior art. The validity period is short, and the packer needs to be unsealed and pulled out when the pump is checked, resulting in the problems of short validity period of isolation production, frequent isolation treatment, high operation and tool costs

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