A plunger expansion packer

A packer and plunger technology, which is applied in the field of plunger expansion packers, can solve the problems of instability, inability to unpack and set, and issue clips, and achieve the effect of good packing performance.

Active Publication Date: 2020-03-17
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a plunger-type expansion packer, which expands the metal tube by utilizing the pressure change during the working process, in view of the problems that the current mechanical extrusion rubber tube is stuck, cannot be unsealed, or is unstable in setting. To carry out setting, can effectively alleviate the above problems

Method used

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  • A plunger expansion packer
  • A plunger expansion packer
  • A plunger expansion packer

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Such as Figure 1-4 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 upp...

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Abstract

The invention relates to the technical field of oil and gas well drilling, well completing, well cementing or well logging, in particular to a plunger type expansion packer. The two ends of an expansion tube are fixedly connected with an upper casing and a lower casing correspondingly. The two ends of a central tube are fixedly connected with the upper casing and the lower casing correspondingly.A starting valve core is fixed in a starting cylindrical cavity through a starting nail. A plugging valve core is fixed in a plugging cylindrical cavity through a plugging nail. A flow inlet hole penetrating through the central tube communicates with an inner cavity of the central tube and the starting cavity. The lower end of the plugging cylindrical cavity is provided with a through hole communicating with an expansion cavity. A middle channel penetrates through the side wall of the plugging cylindrical cavity and communicates with the starting cavity and the expansion cavity. A plugging opening and a starting opening are formed in the side wall of the plugging cylindrical cavity and the side wall of the starting cylindrical cavity correspondingly. A starting valve covers the starting opening when the starting valve core is fixed by the starting nail. The middle channel is unblocked when the plugging valve core is fixed by the plugging nail. After the plugging nail is broken, the plugging valve core can move to cover the plugging opening, and plugging performance is good.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, well completion, well cementing or well logging, in particular to a plunger type expansion packer. 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, the existing packers are prone to pinching due to deformation and distortion, or cannot be unsealed, the setting seal is unstable, and the rubber tube is easily damaged In the current situation, most of the current packers use mechanically extruded rubber tubes to expand the rubber tubes to achieve separation, which has the above-mentioned problems. Contents of the invention [0003] The purpose of the present invention is to provide a plunger-type expansion packer, which expands the metal tube by utilizing the pressure change during the working process, in view of the problems that the current mechanical extrusion ...

Claims

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Application Information

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