An oilfield downhole packer

Abstract

An oilfield downhole packer, relating to the technical field of oilfield downhole tools, including an upper joint, a center pipe, a liner, a rubber cartridge assembly, an upper stop ring, a lower stop ring, a setting mechanism and a lower joint, and the upper and lower ends of the center pipe They are threadedly connected with the upper joint and the lower joint respectively, the liner is slidably fitted on the outside of the central tube, the rubber cartridge assembly is fitted on the outer side of the liner, the outer side of the upper retaining ring of the rubber cartridge is threadedly connected with an upper jacket, and the upper jacket and The upper joint slides and seals, and the lower end of the lower retaining ring is threaded with a snap ring sleeve; there is an annular space between the lower retaining ring, the snap ring sleeve and the center tube, and a snap ring claw, an unlocking sleeve and a release ring are arranged in the annular space. The invention provides an oilfield downhole packer that can be repeatedly set and unsealed, which has the advantages of good isolation effect and large cross-section of the well flushing channel.

Description

technical field [0001] The invention belongs to the technical field of oilfield downhole tools, in particular to an oilfield downhole packer. Background technique [0002] Layered water injection means that a packer is lowered into the water injection well to separate the oil layers with large differences, and then the water distribution device is used to distribute water in layers, so that the water injection volume of the high permeability layer can be controlled, and the water injection of the middle and low permeability oil layers can be obtained. Enhanced, a water injection method that enables all types of oil layers to play a role. [0003] In order to ensure the long-term and efficient water injection of the layered water injection string, it is necessary to wash the well regularly to remove the impurities in the formation; therefore, the success of the well washing is the key factor for the smooth progress of the layered water injection. [0004] Commonly used water...

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