Oil-gas well pneumatic expansion packer

A packer and expansion technology, which is applied in the fields of well completion, oil and gas drilling, cementing or well logging, can solve the problems of difficulty in running the packer downhole, corrosion failure of the packer rubber tube, etc., and achieve easy and difficult downhole Deformation expansion, good rigidity effect

Active Publication Date: 2018-03-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pneumatically expandable packer for oil and gas wells, aiming at the problems that the current packer rubber sleeve is prone to corrosion failure and the packer is prone to jamming during the downhole process, making it difficult to go down the well. An anti-corrosion protective layer is provided outside the expansion tube (acting on the same rubber tube) to prevent the expansion tube from being corroded and invalidated

Method used

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  • Oil-gas well pneumatic expansion packer
  • Oil-gas well pneumatic expansion packer
  • Oil-gas well pneumatic expansion packer

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0027] Such as Figure 1-3 As shown, a plunger-type expansion packer includes a center pipe 2, an expansion pipe 5, an upper casing 1, a lower casing 8, and a setting valve 3. The expansion pipe 5 is sleeved on the center pipe 2, and the expansion pipe The two ends of 5 are fixedly connected with the upper casing 1 and the lower casing 8 respectively, and the two ends of the center pipe 2 are fixedly connected with the upper casing 1 and the lower casing 8 respectively, the center pipe 2, the upper casing 1, the expansion tube 5 cooperates with the lower casing 8 to form an expansion cavity 4,

[0028] The setting valve 3 includes a starting spool 32, a starting nail 34, a blocking spool 31, a blocking nail 33, a starting cylindrical cavity 36 and a blocking cylindrical cavity 35, and the starting spool 32 is fixed on the starting column by the starting nail 34. Shaped cavi...

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Abstract

The invention relates to the technical field of oil-gas well drilling, well completion, well cementation or well logging, in particular to an oil-gas well pneumatic expansion packer which comprises acentral pipe, an expansion pipe, an upper sleeve, a lower sleeve and a setting valve. The expansion pipe sleeves the central pipe, two ends of the expansion pipe are fixedly connected with the upper sleeve and the lower sleeve respectively, and two ends of the central pipe are fixedly connected with the upper sleeve and the lower sleeve respectively; the expansion pipe comprises a framework, an inner layer and an outer layer, and the framework is made of a metal material. The framework made of metal enables the expansion pipe to be higher in rigidity, less prone to deforming expansion and higher in needed deforming expansion pressure, so that jamming in the process of going down to a well is reduced, and the packer is easier in going down to the well.

Description

technical field [0001] The invention relates to the technical fields of oil and gas drilling, well completion, well cementing or well logging, and in particular to a pneumatic expansion packer for oil and gas wells. Background technique [0002] In the downhole operation of oil and gas field development, as well as in drilling, cementing, testing, well completion and other operations, because the packers are all running downhole and are often in contact with corrosive fluids, the current rubber cartridges are easily corroded by corrosive fluids, making them Packing failure; in addition, the existing packer is prone to jamming during the downhole process, and it is difficult to lower the packer to the predetermined position. Contents of the invention [0003] The purpose of the present invention is to provide a pneumatically expandable packer for oil and gas wells, aiming at the problems that the current packer rubber sleeve is prone to corrosion failure and the packer is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/126E21B33/12
CPCE21B33/1208E21B33/126
Inventor 胡刚王国荣赖飞戴黎明湛精华王方正蔡文博赵世平
Owner SOUTHWEST PETROLEUM UNIV
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