Grit packer

Abstract

The invention relates to a sump packer which comprises a center tube. The sump packer is characterized in that a setting locking mechanism and a suspension sealing assembly are arranged on the center tube, the setting locking mechanism comprises a pressing ring fixed to the center tube through a shear pin, the suspension sealing assembly comprises an upper slip, an upper cone, a sealing rubber cylinder component, a lower cone and a lower slip which are sequentially sleeved on the center tube, the sealing rubber cylinder component comprises a rubber cylinder, a female expansion ring, a male expansion ring and a shroud ring, the female expansion ring and the male expansion ring are symmetrically arranged on two sides of the rubber cylinder, and a supporting ring and a sealing ring are mounted between the rubber cylinder and the center tube. The sump packer has the advantages that the upper portion and the lower portion of the rubber cylinder of the packer can bear 5000Psi high pressure, the risk of setting the packer in advance is avoided, setting is reliable, well-completion practice can be smoothly performed, a sealing oil layer is annular, the anchored slips can bear the load of a sand prevention tubular column and axial load under the working condition in the later period, additionally, the sump packer is high in working sealing pressure, reliable in setting and recycling operation and simple and convenient to operate, and operation efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas well completion, in particular to a sand setting packer. Background technique [0002] In the field of oil production and completion industry, in order to support the weight of the string and seal the casing annulus, packers are often used to seal or isolate the bottom of the oil zone. At present, the packers in the known technology have the following defects in actual use: first, the packer encounters resistance during the running process, and the shear pins are accidentally cut, which easily causes the risk of the packer being set in advance; , after the traditional packer is set, the sealing pressure difference level of the rubber cylinder is low, and the slip anchoring suspension load is small; third, when the packer is recovered, it needs to be lowered into cutting and fishing tools to recover in sections, and the on-site operation is lowered into positioning The error is large, ...

AI Technical Summary

Problems solved by technology

At present, the packers in the known technology have the following defects in actual use: first, the packer encounters resistance during the running process, and the shear pins are accidentally cut, which easily causes the risk of the packer being set in advance; , after the traditional packer is set, the sealing pressure difference level of the rubber tube is low, and the slip anchoring suspension load is small; third, when the packer is recovered, cutting and fishing tools need to be lowered to recover in sections, and the on-site operation is lowered to position The error is large, and the use of multi-stage segmented recovery is not only cumbersome, time-consuming and laborious, but also affects the efficiency of the operation, and the operation cost is high

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