Sand draining packer

A technology of sand sealing and sand dredging groove, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as reduced pressure bearing capacity, increased running resistance, and sand stuck, etc., to achieve Reduced entry resistance, dredge cuttings, and simple structure

Inactive Publication Date: 2015-10-21
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a casing string with a packer is run in at present: (1) a large amount of cuttings will accumulate in front of the circular packer, and more and more, resulting in an increase in running resistance, and even occurrence of Sand stuck; (2) The rubber barrel of the packer was severely worn by cuttings, and the pressure bearing capacity was reduced

Method used

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  • Sand draining packer

Examples

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Embodiment Construction

[0013] exist figure 1 In the schematic diagram of the sand dredging packer, the box 1 is fixedly connected to one end of the upper support ring 2, and the other end of the upper support ring is connected to one end of the center pipe with the rubber bucket 4, and the The other end of the central tube is connected with one end of the lower support ring 5, and the other end of the lower support ring is connected with the male buckle 6. The diameters of the upper support ring and the lower support ring are equal, and the circumferential surfaces of the upper support ring and the lower support ring are uniform. Six axial sand dredging grooves 3 are provided, and the diameter of the rubber barrel is smaller than the diameters of the upper support ring and the lower support ring.

[0014] The present invention can be connected in the middle of casing pipe or oil pipe. Connected in the middle of the casing for multi-packer casing string completion in open-hole horizontal wells; conn...

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Abstract

The invention discloses a sand draining packer. The packer comprises a female buckle, an upper supporting ring, rubber barrels, a lower supporting ring and a male buckle. The female buckle is fixedly connected to one end of the upper supporting ring; the other end of the upper supporting ring is connected to one end of a center pipe provided with the rubber barrels; the other end of the center pipe provided with the rubber barrels is connected to one end of the lower supporting ring; and the other end of the lower supporting ring is connected to the male buckle. The diameter of the upper supporting ring is equal to that of the lower supporting ring. Multiple axial sand draining grooves are arranged on the circumferential surfaces of the upper and lower supporting rings. The diameter of each rubber barrel is less than that of the upper and lower supporting rings. The sand draining packer is simple in structure, has good san draining effects, and can alleviate the abrasion on the rubber barrels.

Description

technical field [0001] The invention relates to an oil and gas field well completion tool in the field of machinery, in particular to a sand dredging packer for staged fracturing of an open-hole horizontal well section. Background technique [0002] Running casing strings with multiple packers in open hole horizontal wells has become more and more widely used in well completion operations. However, when a casing string with a packer is run in at present: (1) a large amount of cuttings will accumulate in front of the circular packer, and more and more, resulting in an increase in running resistance, and even occurrence of Sand stuck; (2) The rubber barrel of the packer was severely worn by cuttings, and the pressure bearing capacity was reduced. Contents of the invention [0003] The purpose of the present invention is to provide a sand dredging packer with simple structure, good sand dredging effect and reduced rubber cylinder wear. [0004] Technical scheme of the prese...

Claims

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Application Information

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IPC IPC(8): E21B33/127
Inventor 李子丰宋广明杨军伟
Owner YANSHAN UNIV
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