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Mixed bridge plug

A hybrid bridge and mandrel technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problem of bridge plug residues at the bottom of the well, and achieve the effect of ensuring reliability

Active Publication Date: 2019-01-18
VERTECHS OIL & GAS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a hybrid bridge plug to solve the technical problem that the existing bridge plug has a large number of residues at the bottom of the well during the reconstruction process

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] A schematic cross-sectional view of a hybrid bridge plug according to an embodiment of the present invention can be found in figure 1 , used for temporary plugging of oil and gas wellbore, including hollow mandrel 2 and rubber sleeve 7, rubber sleeve 7 is slidably sleeved on the middle of the outer surface of mandrel 2, and the outer surface of mandrel 2 is located at one end of rubber sleeve 7 in turn The first cone sleeve 8 and the first slip seat limiting structure 9 are sleeved, and the first joint 10 is sleeved on one end of the mandrel 2; There is a second cone sleeve 6 and a push ring 3, and the other end of the mandrel 2 is provided with a second joint 1; the mandrel 2, the first cone sleeve 8, the first slip seat limiting structure 9, the push ring The ring 3, the second cone sleeve 6, the first joint 10 and the second joint 1 are all m...

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Abstract

The invention relates to a mixed bridge plug. The mixed bridge plug is used for temporarily blocking off an oil-gas shaft, and comprises a central spindle and a rubber sleeve, wherein the middle of the outer surface of the central spindle is slidably sleeved with the rubber sleeve, the position, located at one end of the rubber sleeve, of the outer surface of the central spindle is sleeved with afirst pyramidal sleeve and a first slip bowl limiting structure in sequence, and one end of the central spindle is provided with a first connector; the position, located at the other end, of the outersurface of the central spindle is sleeved with a second pyramidal sleeve and a push ring in sequence, and the other end of the central spindle is provided with a second connector; the central spindlecomprises a first central spindle and a second central spindle, the second central spindle abuts against the first connector, the length of the second central spindle is less than or equal to the setting stroke of the mixed bridge plug, and the second central spindle and the first connector are both made from a soluble material. Before oil-gas well production, the second central spindle and the first connector can be directly dissolved after bridge plugs in the shaft are all removed, and almost no residue remains at the bottom of the well.

Description

technical field [0001] The invention relates to the technical field of a downhole tool used in staged reconstruction of oil and gas well fracturing to temporarily block the inner diameter of a casing, in particular to a hybrid bridge plug. Background technique [0002] In oil and gas well staged fracturing operations, composite bridge plugs or cast iron bridge plugs are usually used as staged tools. These two bridge plugs have their own advantages. For example, the composite bridge plug has the characteristics of fast drilling and grinding speed. After the fracturing operation is completed, these composite bridge plugs must be quickly drilled and ground by coiled tubing to form a full-diameter wellbore . [0003] For traditional bridge plugs, the two ends of the bridge plug are provided with a first joint and a second joint, and an intermeshing structure is provided on the first joint and the second joint. In the drilling and grinding of multiple bridge plugs in oil and gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134E21B43/26
CPCE21B33/134E21B43/26
Inventor 张伟金宁静
Owner VERTECHS OIL & GAS TECH CO LTD
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