Title:
PORT COLLAR ASSEMBLY FOR USE IN A WELLBORE
Document Type and Number:
WIPO Patent Application WO2001094743
Kind Code:
A3
Abstract:
The present invention generally provides a port collar assembly (200) comprising a housing (205) and a sleeve (206) disposed therein. The sleeve is moveable between a first or opened and a second or closed position relative to the housing. In the closed position, the port collar prevents communication of the fluid between the exterior and interior of the port collar. In the open position, the port collar permits communication of the fluid between the exterior and interior of the port collar. The assembly includes a locking mechanism (300, 301) for the opened and closed positions comprising ratchet teeth (375) formed on the exterior surface of the sleeve and mating ratchet teeth (375) formed on the interior surface of the housing. The mating ratchet teeth are designed to secure the sleeve in a first position within the housing. A second set of mating ratchet teeth secures the sleeve in a second position.
Inventors:
FREIHEIT ROLAND (CA)
GULLORY BRETT (US)
WILKIN JAMES (CA)
GULLORY BRETT (US)
WILKIN JAMES (CA)
Application Number:
PCT/GB2001/002453
Publication Date:
May 16, 2002
Filing Date:
June 05, 2001
Export Citation:
Assignee:
WEATHERFORD LAMB (US)
HARDING RICHARD PATRICK (GB)
FREIHEIT ROLAND (CA)
GULLORY BRETT (US)
WILKIN JAMES (CA)
HARDING RICHARD PATRICK (GB)
FREIHEIT ROLAND (CA)
GULLORY BRETT (US)
WILKIN JAMES (CA)
International Classes:
E21B34/14; (IPC1-7): E21B34/14
Foreign References:
| US5484017A | 1996-01-16 | |||
| EP0692610A2 | 1996-01-17 | |||
| GB2129848A | 1984-05-23 | |||
| GB2309470A | 1997-07-30 | |||
| EP0618345A1 | 1994-10-05 | |||
| US4669541A | 1987-06-02 | |||
| US5513703A | 1996-05-07 | |||
| EP0581533A2 | 1994-02-02 |
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