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Packer and use method thereof

A technology of packer and centralizer, which is applied in the directions of sealing/isolation, earthwork drilling and production, wellbore/well parts, etc. Sealing load and other issues, to overcome the effect of easy scratches

Inactive Publication Date: 2017-09-08
DRILLING TECH DEV CO LTD OF TIANJIN DAGANG OILFIELD PETROLEUM ENG INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

Among them, mechanical setting packers are widely used in wells with small well deviations, but in highly deviated wells or horizontal wells, due to the high friction resistance of the pipe string, it is impossible to provide sufficient setting load for the mechanical packer. Therefore, the application of mechanical packers in highly deviated wells is limited; in addition, some oil production strings cannot use hydraulically set packers due to the intelligent structure of the string and the matching of mechanically set packers

Method used

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  • Packer and use method thereof
  • Packer and use method thereof

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Embodiment Construction

[0036] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the referred device or element must have a particular orientation, be constructed, and operate in a particular orientation, are therefore not to be construed as restrictive to the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be unders...

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Abstract

The invention provides a packer and a use method thereof. The packer comprises a center tube and a first seat seal mechanism, a second seat seal mechanism and an anchoring mechanism which are arranged on the outer side of the center tube in sequence in a sleeving mode; the first seat seal mechanism comprises a rubber cylinder and an extrusion part, the lower end of the rubber cylinder is fixed to a first cone through a rubber cylinder support, and the upper end of rubber cylinder can slide on the outer wall of the center tube in a limiting mode through the extrusion part; the second seat seal mechanism is provided with a slip and the first cone, and the first cone can be fixedly inserted into the slip in a matched mode; the anchoring mechanism comprises a stable part and a clamping part, the stable part comprises a centralizer, and a centralizer base is connected with the slip base. The packer and the use method thereof are suitable for a composite seat seal packer of a highly-deviated well, and the requirement of oil extraction production is met.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a composite packer and a using method thereof. Background technique [0002] In the process of oil production, the packer, as the main downhole tool, is mainly used to isolate different layers. wait. Among them, mechanical setting packers are widely used in wells with small well deviations, but in highly deviated wells or horizontal wells, due to the high friction resistance of the pipe string, it is impossible to provide sufficient setting load for the mechanical packer. Therefore, the application of mechanical packers in highly deviated wells is limited; in addition, some oil production strings cannot use hydraulically set packers because of the intelligent string structure and mechanically set packers. Therefore, a composite packer with mechanical setting as the main setting method is needed on site. Contents of the invention [0003] In view of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/122
CPCE21B33/122
Inventor 李志广闫永维周宝义张子佳李风涛李川陈冬甘宝安
Owner DRILLING TECH DEV CO LTD OF TIANJIN DAGANG OILFIELD PETROLEUM ENG INST
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