Double-rubber-barrel packer

Abstract

The invention relates to a double-rubber-barrel packer. The double-rubber-barrel packer comprises an upper joint, a lower joint and a center tube, wherein the center tube is sleeved with an outer tube; the outer tube is sleeved with an upper rubber barrel and a lower rubber barrel, and the outer tube is sleeved with a lower cylinder sleeve between the upper rubber barrel and the lower rubber barrel; an upper compression sleeve for compressing the upper rubber barrel upwards and a lower piston for compressing the lower rubber barrel downwards are arranged between the lower cylinder sleeve and the outer tube; setting sealing liquid inlet holes are correspondingly formed in the positions, between the upper compression sleeve and the lower piston, of the center tube and the outer tube; the lower cylinder sleeve and the upper compression sleeve are correspondingly provided with locking structures which are locked in a matched mode, the lower cylinder sleeve is fixedly connected with the lower piston, a sleeve unsealing assembly is arranged on the position, on the upper side of the upper rubber barrel, of the outer tube, and the center tube is provided with a lifting and hanging structure which is matched with the sleeve unsealing assembly to drive the sleeve unsealing assembly to ascend to unseal the upper rubber barrel when the center tube is lifted; and an unsealing seat assemblyis arranged on the position, on the lower side of the lower rubber barrel, of the outer tube, when the central tube is lifted, the unsealing seat assembly can be driven downwards by a pipe column on the lower side of the lower joint to unseal the lower rubber barrel. The double-rubber-barrel packer has simple unsealing operation and good unsealing effect.

Description

technical field [0001] The invention relates to a packer used in the field of oil production in an oil field, in particular to a packer with a double-rubber cartridge. Background technique [0002] In the later stage of oilfield development, the water cut of oil wells is getting higher and higher, and the phenomenon of casing leakage is becoming more and more serious. The use of packers to seal high aquifers and casing leakage sections is an important means to reduce the water cut of oil wells and increase production. At present, most of the packers are single rubber cartridge packers. Due to structural reasons, the rubber cartridge is easily damaged when unsealing the lifting string, and there is a problem of poor setting effect. [0003] For this reason, the Chinese utility model patent whose authorization notification number is CN203685109U discloses a double-group rubber cartridge packer, which includes an upper joint, a lower joint, and a central pipe connected between ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-rubber packer, aiming to solve the problem that the existing double-rubber packer is difficult to unseal

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