a packer

A packer and unsealing technology, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of being stuck and unable to be unsealed, and achieves convenient operation, simple structure, and avoids accidents. Cards and effects that cannot be unsealed

CN104806193BActive Publication Date: 2017-12-08CHINA NAT OFFSHORE OIL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-12-08

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Abstract

The invention relates to a packer which comprises a main body component, a central shaft, a sitting sealing component, a compressing rubber sleeve component and an unsealing component, wherein the sitting sealing component, the compressing rubber sleeve component and the unsealing component are arranged on the central shaft in turn; the unsealing component comprises an unsealing pressure-transferring channel and an unsealing downlink component; the unsealing pressure-transferring channel is communicated with a ground hydraulic pipeline; the unsealing downlink component is mounted on the central shaft; the unsealing downlink component is communicated with the unsealing pressure-transferring channel; the unsealing downlink component moves down under the effect of pressure in the unsealing pressure-transferring channel. The packer can be used for unsealing through the pressurizing of the ground hydraulic pipeline, so that the problems of blocking and incomplete unsealing caused by the fact that an external blocking tile is unable to reset are solved.
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Description

technical field

[0001] The invention relates to a packer. Background technique

[0002] At present, most of the cable-through packers used in most offshore oil and gas fields adopt the setting method of hydraulic setting by pressing the tubing, and the unsealing method is mechanical unsealing by pulling the tubing directly, and adopting a two-way outer card with a spring mechanism The shoe anchors the packer, but in the actual field use, because the spring of the outer slip is exposed to corrosive well fluid for a long time, the spring is prone to failure, and the outer slip cannot be reset normally, resulting in the failure of the packer. If it cannot be unsealed normally, the packer is prone to jamming accidents during the pulling out process, which brings great troubles to the workover operations of offshore oil and gas platforms. Contents of the invention

[0003] In order to solve the above technical problems, the present invention provides a packer, the packer does ...

Examples

Embodiment Construction

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0023] A packer, including a main body assembly 1, a central shaft 2, a setting assembly sequentially arranged on the central shaft 2, a compression rubber cylinder assembly, and an unsealing assembly, the unsealing assembly includes a The unsealing pressure transmission channel 17 and the unsealing downlink assembly arranged on the central shaft 2, the unsealing downlink assembly communicates with the unsealing pressure transmission channel 17, and the unsealing downlink assembly is in the unsealing Under the action of the pressure in the pressure transmission channel 17, it...