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A pneumatically expandable packer for oil and gas wells

A packer and expansion technology, which is applied in cementing or well logging, oil and gas drilling, and well completion, can solve the problems of packer rubber sleeve corrosion failure, packer downhole difficulty, etc., so that it is not easy to deform and expand, Easy downhole, high deformation and expansion pressure

Active Publication Date: 2020-03-17
SOUTHWEST PETROLEUM UNIV
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  • 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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  • A pneumatically expandable packer for oil and gas wells
  • A pneumatically expandable packer for oil and gas wells
  • A pneumatically expandable packer for oil and gas wells

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the drawings.

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

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

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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 field of oil and gas drilling, well completion, cementing or logging, and in particular to a pneumatic expansion packer for oil and gas wells. Background technique [0002] In oil and gas field development downhole operations, as well as in drilling, cementing, testing, and completion operations, since packers are all operating downhole and are mostly in contact with corrosive fluids, the current rubber barrels are easily corroded by corrosive fluids, which makes Packing failure; in addition, the existing packer is prone to jams during the downhole process, and it is difficult to lower the packer to the predetermined position. Summary of the invention [0003] The purpose of the present invention is to provide a pneumatic expansion packer for oil and gas wells in view of the current problems that the packer rubber barrel is prone to corrosion failure and the packer is prone to jams during the downhole process, making it...

Claims

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Application Information

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Patent Type & Authority Patents(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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