Environment-friendly washable well-cleaning step-by-step unsealing water injection packer

Abstract

The invention discloses an environment-friendly well-washable step-by-step deblocking water injection packer which comprises a central pipe, an upper joint, an upper core pipe, an upper outer sleeve, a locking sleeve, an outer core pipe, a rubber barrel and a lower joint, wherein the upper joint sleeves the central pipe; the upper core pipe is arranged in an inner cavity between the upper joint and the central pipe; the upper end of the upper core pipe is connected with the central pipe; the upper outer sleeve sleeves the upper core pipe; the upper end of the upper outer sleeve is connected with the upper joint; the locking sleeve sleeves the lower end of the upper outer sleeve; a clamping spring is arranged in an inner cavity between the locking sleeve and the central pipe and is arranged on a clamping spring seat; the outer core pipe sleeves the central pipe; the upper end of the outer core pipe is connected with the clamping spring seat; the rubber barrel is arranged between the locking sleeve and the lower joint. The environment-friendly well-washable step-by-step deblocking water injection packer has the benefits that the rubber barrel of the packer can be prevented from being locked, so that the safety and the reliability of deblocking of the packer are greatly improved. An anti-locking mechanism of the environment-friendly well-washable step-by-step deblocking water injection packer has the characteristics of being simple in operation, novel in structure, safe and environmentally friendly.

Description

technical field [0001] The invention relates to a water injection packer, in particular to an environment-friendly water injection packer which can be washed well and unsealed step by step. Background technique [0002] Currently, as the oilfield develops, more reservoirs are injected with water in the same well to increase recovery. This is subdivision layer water injection in the oil field. Subdivision layer water injection requires a large number of packers to be connected to the injection well string, and the oil layer is isolated through the packers, and the packers used are mostly unsealed step by step. Packer, step-by-step unsealing packer, when unsealing, the unsealing force acts on the single-stage packer, and does not conduct to the next-stage packer. The single-stage unsealing force is small and the unsealing effect is good. At present, the step-by-step unsealing mechanism of the step-by-step packers used in the combined strings of water injection and layering op...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to solve the problem that the existing step-by-step unsealing packer cannot normally inject water in layers and is difficult to unsealing during use;

[0004] Another object of the present invention is to solve the problem that the parts of the existing step-by-step unpacking packer are easy to rust and scale and cannot be used during use;

[0005] Another object of the present invention is to solve the problem that the existing step-by-step unpacking packer often occurs that the rubber cartridge is stuck in the well and the packer cannot be unsealed;

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