A water injection packer

Abstract

The invention discloses a water injection packer, which belongs to the field of oil field water injection. The water injection packer includes: a water distribution mechanism and a seat unsealing mechanism. The water distribution machine includes an upper joint, a working cylinder, a water hole, a fixed water nozzle, a fixed water nozzle inner lining, a movable water nozzle outer lining, and a water nozzle outer lining collar. and the water outlet; among them, the water hole is set on the working cylinder for water to flow into other water injection packers connected with the water injection packer; the lining of the fixed water nozzle is set inside the fixed water nozzle, and the contact part of the two There is a spout, and the inner lining of the fixed spout is provided with a water outlet hole; the outer lining of the movable spout is set opposite to the inner lining of the fixed spout, and the collar of the outer lining of the spout is arranged at the lower end of the outer lining of the movable spout; The sealing mechanism is provided with a ring cavity and a liquid outlet. The water injection packer integrates the water distribution and water volume adjustment functions of the water distributor with the water injection packer, which makes the deployment process simple, improves the deployment efficiency, shortens the commissioning cycle, and can realize multi-layer subdivided water injection.

Description

technical field [0001] The invention relates to the field of oilfield water injection, in particular to a water injection packer. Background technique [0002] In the process of oil extraction and oil and gas development, it is usually necessary to inject water into the reservoir to supplement the energy of the formation. By increasing the sweep coefficient of the injected water, the oil recovery rate and recovery rate can be increased. When developing a multi-layer reservoir, the reservoir is often divided into multiple layers in advance, and then the water injection packer is used to separate each production layer, and then the water distributor injects water into each single layer to improve the oil recovery of the reservoir speed and oil recovery. [0003] In related technologies, the water injection packer needs to be used in conjunction with a water distributor to achieve layered water injection in the oil field. Specifically, the water injection packer and the water...

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Problems solved by technology

[0005] The embodiment of the present invention provides a water injection packer, which can solve the problem in the related art that the water nozzle of the water distributor needs to be taken out and replaced every time the water injection volume is adjusted. Therefore, the water injection packer and the water distributor are used together. In the layered water injection process of the oilfield, the deployment process is cumbersome, the deployment efficiency is low, and the deployment cycle is long. The length of the tool string and supporting tools is longer than the target layer in the axial direction, and is constrained by the casing in the radial direction. When the water injection layer is implemented When the interval between sections is getting smaller and smaller, and the thickness of single-layer sections is getting thinner, it is impossible to realize the problem of subdivided water injection in multi-layer sections

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