Open hole well packer

Abstract

The invention relates to an open hole well packer, a rubber tube is sheathed outside an upper inner tube, an upper joint, the upper inner tube, a combined valve body, a lower inner tube and a lower joint are sequentially connected, the lower part of an upper rubber tube sheath covers the upper part of the rubber tube, the upper part of the upper rubber tube sheath is sheathed outside the upper joint, the upper part of a lower rubber tube sheath covers the lower part of the rubber tube, the upper part of a sealing sleeve is connected with the lower part of the lower rubber tube sheath, the lower part of the sealing sleeve is sheathed outside the combined valve body, an upper piston and a lower piston are mounted between the sealing sleeve and the lower inner tube, preset solution is perfused above the upper piston, the lower piston is arranged below the upper piston, a communicating hole is arranged on the upper piston, the communicating hole is positioned between the upper piston and the lower piston, a vertical pore canal is arranged on the combined valve body, a one-way valve is mounted at the upper part of the vertical pore canal, the one-way valve is designed for enabling the rubber tube to be in expansion state permanently, the rubber tube is expanded by the preset solution, and the one-way valve can not be corroded and damaged, so that the rubber tube can work effectively for a long time and meet the requirement on permanent blocking of the well bottom of an open hole well in an oilfield.

Description

Open hole packer technical field The invention is a device for permanently sealing the bottom of a well in an oil field, and is an open hole packer. Background technique The expansion packer used for oilfield water injection is to expand the rubber sleeve outward when the pressure inside the rubber sleeve is higher than the external pressure of the rubber sleeve, so as to realize the sealing of the annular space of the oil casing. The current expandable packer will be unsealed when there is no pressure inside, which is not suitable for the requirements of oil fields to permanently seal the bottom of the well. Some expandable packers have a one-way mechanism inside, which can guarantee It will not be unblocked when there is no pressure difference, but the time for keeping it unblocked is limited, and it is not suitable for the requirements of oilfields to permanently seal the bottom of the well. Contents of the invention The purpose of the present invention is to provid...

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