Double-closing and double-opening plugging device

Abstract

The invention relates to a double-closing and double-opening plugging device in the field of oil field layered water injection tools. The double-closing and double-opening plugging device comprises anupper spout sleeve which is arranged in an upper screw shell in a floating sealed mode; the upper end of the upper spout sleeve is provided with a limiting step, and the lower end of the upper spoutsleeve abuts against a reset spring; an upper spout core is arranged in the upper spout sleeve, and the upper spout core and the upper spout sleeve are in sliding clearance fit in the circumferentialdirection; a radial water outlet is formed in the circumferential direction of the upper spout core, and the upper side, matched with the upper spout core, of the upper spout sleeve is provided with asealed conical surface in a matched mode in the circumferential direction; the upper part of the upper spout core is connected with an upper screw shaft, the upper screw shaft is inserted in the outer circumference of a main driving shaft in an axial sliding mode, and the outer circumference of the upper screw shaft is in threaded transmission connection with the upper screw shell; a lower spoutsleeve is fixedly arranged in a lower screw shell of the main driving shaft part, the inner circumference of the lower spout sleeve is provided with a lower spout core in a matched mode, a radial water outlet is formed in the circumferential direction of the lower spout core, and the upper part of the lower spout core is connected with a lower screw shaft in a rotation following mode; and the lower screw shaft is connected with the main driving shaft through a lower driving sleeve in a rotation following mode, the outer circumference of the lower screw shaft is in threaded transmission connection with the lower screw shell, the inner circumference of the lower part of the lower spout sleeve is provided with a matched conical surface, and the lower side of the lower spout sleeve is providedwith a cone valve assembly abutting against the matched conical surface in a matched mode.

Description

technical field [0001] The invention relates to the field of layered water injection tools for oil fields, in particular to a double-closed and double-opened plug used for sealing off water distributors and capable of synchronously measuring and distributing water in two layers. Background technique [0002] The newly developed eccentric integrated packing water distributor in other domestic oilfields has two types of plugs: ①integrated plug, when the packer is seated, two dead nozzles are installed first, and two water nozzles are built in after the packer is picked up. The size of the plug is fixed. When adjusting, it needs to be pulled out from the well and put in again. The workload is heavy. When testing and deploying, a storage type flowmeter is used, and the data needs to be played back on the ground. With the increase of the number of layers, the measurement and adjustment period is prolonged, and the production cost and labor intensity are increased. Two single-la...

AI Technical Summary

Problems solved by technology

For example, in the patent specification with the patent number of 2015200796938, an intelligent adjustable anti-return dead mouth plug is disclosed, which uses the gap between the valve core and the valve sleeve to control the flow, and the valve ball and the valve sleeve are combined to achieve closure; Nozzles are only improved in terms of their own performance, but not from the perspective of overall technology, so as to improve performance and reduce application costs

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