Deep well wall orientation plugging device and plugging method

A plugging device and technology for deep water wells, applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve problems such as high cost, damaged pipe wall, long cement setting time, etc., to achieve easy operation, Change the stress state and block the effect of strong target

Active Publication Date: 2016-08-31
SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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  • Abstract
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Problems solved by technology

This method takes a long time for the cement to set, and the cost is high. If the pipe wall is damaged again, it is not easy to deal with it.

Method used

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  • Deep well wall orientation plugging device and plugging method

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Embodiment Construction

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by 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.

[0017] like figure 1 As shown, the directional plugging device for the well wall of a deep water well includes a casing 1, a boom 2 is arranged on the top of the casing 1, and a double-acting hydraulic jack 3 is installed in the casing 1, and the double-acting hydraulic jacks are used to support the casing on the On the well wall of the deep water well, and the borehole is compressed and sealed, the piston rod of the double-acting hydraulic jack 3 is provided with a support backing plate 4, and the support backing plate 4 is provided with a step through hole 5, and...

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Abstract

The invention relates to a deep well wall orientation plugging device and plugging method, and belongs to the deep well wall damage repairing technical field; the plugging device and method are simple in operation, employ orientation grouting plugging to improve well wall integrity, thus providing better plugging effect. The technical scheme is that the top of a housing is provided with a suspension rod; a dual-effect hydraulic jack is arranged in the housing; the piston rod of the dual-effect hydraulic jack is provided with a support pad; the support pad is provided with a step through hole having a seal ring; a grouting pipe is arranged in the step through hole, and connected with a grouting pump through a connecting soft pipe; the deep well wall orientation plugging device and plugging method can be widely applied to deep well wall plugging.

Description

technical field [0001] The invention relates to a directional plugging device and a plugging method for a deep-water well wall, and belongs to the technical field of deep-water well wall damage repair. Background technique [0002] The currently used plugging method is to use cement plugging. Use a pipe with a smaller diameter to repair the pipe. Specifically, run the smaller pipe into the wall of the repaired well, connect the upper part with a reverse wire joint, connect the drill pipe, and wrap brown leather and kelp at intervals at 1m below the repaired pipe, and continuously Inject clean water to make the kelp expand, and the cement slurry passes through the drill pipe and anti-wire joint, and is injected into the annular gap between the well wall pipe and the replenishment pipe. After the cement solidifies, the drill pipe and anti-wire joint return to the wellhead together. This method takes a long time for the cement to set, and the cost is high. If the pipe wall is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/138
CPCE21B33/138
Inventor 张云刘子兴陈盼
Owner SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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