Title:
井戸又は管の内に管を付設又は密閉するための膨脹可能の管状スリーブ
Document Type and Number:
Japanese Patent JP3618354
Kind Code:
B2
Abstract:
PCT No. PCT/FR96/01226 Sec. 371 Date Jun. 4, 1998 Sec. 102(e) Date Jun. 4, 1998 PCT Filed Aug. 2, 1996 PCT Pub. No. WO97/06346 PCT Pub. Date Feb. 20, 1997A radially deformable inflatable tubular sleeve for tubing or obturating a well (P) or a pipe. The sleeve includes a tube and a series of breakable restraining rings positioned along the tube. The rings are arranged so that each ring breaks one after the other in the longitudinal direction of the sleeve when the tube is inflated by an internal fluid under pressure. As a ring breaks, liquid (B) present in the well is moved progressively forward so as to prevent pockets forming on the outside of the tubing.
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Inventors:
Sartel, Jean-Louis
Application Number:
JP50816997A
Publication Date:
February 09, 2005
Filing Date:
August 02, 1996
Export Citation:
Assignee:
Drill flex
International Classes:
E21B23/06; E21B33/127; E21B43/10; F16L55/12; F16L55/134; (IPC1-7): E21B43/10
Domestic Patent References:
| JP5614469Y2 |
Foreign References:
| US4781249 | ||||
| WO1994025655A1 |
Attorney, Agent or Firm:
Kazuo Sato
Asahi Maejima
Hiroyuki Nagai
Masamitsu Sato
Asahi Maejima
Hiroyuki Nagai
Masamitsu Sato