Straight-valve-type layered injection allocation device with special-shaped liquid inlet

Abstract

The invention provides a straight-valve-type layered injection allocation device with a special-shaped liquid inlet, and belongs to the field of machinery. The straight-valve-type layered injection allocation device solves the problems that a liquid inlet of an eccentric injection allocation device used by a polymer injection well of an existing oil field is prone to being blocked by impurities, and a straight-valve-type layered injection allocation device cannot work normally after the liquid inlet is blocked. The straight-valve-type layered injection allocation device comprises a straight-valve-type layered injection allocation device body, the special-shaped liquid inlet and a conical valve, the special-shaped liquid inlet is formed by connecting a first round through hole, a rectangular through hole and a semi-circle through hole, the first round through hole, the rectangular through hole and the semi-circle through hole are communicated, the circle center of the first round through hole, the intersection point of diagonals of the rectangular through hole and the circle center of the semi-circle through hole are located on the same horizontal line, and the radius of the semi-circular through hole is smaller than that of the first round through hole. Generally, the first round through hole of the special-shaped liquid inlet of the straight-valve-type layered injection allocation device is plugged through the conical valve, and when liquid cannot pass through the rectangular through hole and the semi-circular through hole smoothly, the straight-valve-type layered injection allocation device drives the conical valve to move through a screw rod, so that the first round through hole is smooth. The straight-valve-type layered injection allocation device is used for the field of exploitation of crude oil.

Description

technical field [0001] The invention relates to downhole polymer driving equipment, which belongs to the field of machinery. Background technique [0002] In order to further enhance oil recovery, polymer oil recovery has become an important means and method of oil field development after water flooding. However, due to the high viscosity of the polymer and the complex downhole environment, the current manual fishing technology cannot achieve flow monitoring and accurate flow injection. At the same time, the construction is very difficult and cannot meet the requirements of polymer injection. Therefore, it is decided to develop a polymer injection well measurement and adjustment system. , improve the oil displacement effect and further solve the clogging situation caused by impurities, etc., resulting in the failure of the entire equipment to work normally, and the function of layered injection cannot be realized. Contents of the invention [0003] The object of the prese...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the liquid inlet of the eccentric dispenser used in the existing polymer injection wells in the oil field is easily blocked by impurities, which leads to the problem that the straight valve layered dispenser cannot work normally, and provides a special-shaped feed dispenser. Straight valve layer dispenser with liquid port

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