An annular barrier

An annular barrier

  • CN 103,154,425 A
  • Filed: 10/06/2011
  • Published: 06/12/2013
  • Est. Priority Date: 10/07/2010
  • Status: Active Application
First Claim
Patent Images

1. annular obstruction exists (1) that is used for annular space (2) expansion between the inwall (4) of well casing shape structure (3) and down-hole well (5), described annular obstruction exists comprises:

  • -tubular part (6), its part as described well casing shape structure is installed,-inflatable sleeve (7), it is made by the first metal, surround the space (13) that described tubular part and restriction are communicated with inside (64) fluid of described tubular part, described inflatable sleeve has longitudinal extension part, faces inner surface (8) and two ends (9 of described tubular part,

         10)-link (12), it is made by the second metal, connects described inflatable sleeve and described tubular part,-opening, it is used for making fluid enter described space with the described sleeve that expands, and-transitional region (11), it comprises the coupling part (14) that described sleeve is connected with described link,Wherein, described the first metal has higher flexibility than described the second metal.

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