One-way slip hydraulic base sealed packer

Abstract

The present invention is one packer with hydraulically sealed oneway slips seat. The slips seat has one lower sleeve with installation hole for locking blocks, and one locking sleeve to push locking blocks into the locking holes of the conic connecting sleeve for the rigid locking between the slips seat and the conic connecting sleeve. The locking sleeve is provided with one unlocking slot, and may be unlocked when the push tube pushes the locking sleeve upwards for the unlocking slot to correspond to the locking block installation hole. The packer has flexibly set shearing force of the shearing nail in slips seat to ensure no creep of the pipe column in various well job, has job success rate and accuracy rate, and capacity of completing flushing job.

Description

technical field [0001] The invention relates to an isolation device for isolating oil layers or tubing casings of oil and gas wells during the exploration and development of oil and gas fields, especially a one-way slip hydraulic seat capable of preventing construction pipe strings from creeping in oil wells and implementing one-way anchoring Seal the packer. Background technique [0002] At present, the setting mechanism of the known one-way slip hydraulic sealing packer is as follows: Figure 8 As shown, the slip mechanism includes a one-way slip 13 , a slip seat 14 , a slip spring 15 , a spring seat 17 , and an upper cone 12 . When the packer is hydraulically seated, the piston 22 moves upward, pushing the spring seat 17 upward, and the push cylinder 23 integrated with the spring seat 17 moves upward to cut off the shear nail 40 connected to the slip seat 14 and the piston sleeve 19, and 15 slip springs Open, the slip seat 14 moves up under the action of the slip spring ...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: when the packer goes downhole, due to the friction and collision between the packer and the casing, it is easy to cut off the shear nail 40 of the slip seat in the middle and cause the slips to open and anchor, causing a stuck phenomenon. If the shear force of the nail is used to eliminate the above problems, the required high sealing pressure will produce a large piston effect, resulting in the elongation of the construction pipe string, and the contraction of the pipe string when the seating pressure is removed, causing the packer to move. It is very easy to damage the rubber cartridge; in addition, after the packer is unsealed, the slips are still in the open and anchored state, and it is easy to get stuck when encountering irregular places such as casing collars and casing wall burrs

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