A double-closed double-open occluder

Abstract

The invention relates to a double-closed double-open plug in the field of layered water injection tools for oilfields. It includes an upper mouth cover that is floating and sealed in an upper silk shell. The upper end of the upper mouth cover is provided with a limit step. There is an upper mouth core inside the mouth cover, the upper mouth core and the upper mouth cover are matched with the circumferential sliding gap, the upper mouth core is provided with a radial water outlet in the circumferential direction, and the upper side of the upper mouth cover and the upper mouth core is matched with a seal. Conical surface, the upper part of the upper nozzle core is connected with the upper thread shaft, the upper thread shaft is axially slid and plugged into the outer periphery of the main drive shaft, and the outer periphery of the upper thread shaft is connected with the upper thread casing by screw transmission; the lower thread casing of the main drive shaft is fixed inside There is a lower mouth cover, the inner circumference of the lower mouth cover is equipped with a lower mouth core, and the lower mouth core is provided with a radial water outlet around the circumference, and the upper part of the lower mouth core is connected with the lower wire shaft, and the lower wire shaft is connected to the main drive shaft through the lower drive sleeve. Follow-up connection, the outer circumference of the lower wire shaft is threadedly connected with the lower wire housing, the inner circumference of the lower part of the lower mouth sleeve is provided with a matching cone surface, and the lower side of the lower mouth sleeve is provided with a cone valve assembly that cooperates with the matching cone surface.

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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