Title:
SEALING OFF OPENINGS THROUGH THE WALL OF A WELL TUBULAR
Document Type and Number:
WIPO Patent Application WO2001038692
Kind Code:
A8
Abstract:
A device (1) for sealing off an opening (5, 6) through the wall of a well tubular (2), which device comprises a tubular spacer (10) having an outer diameter allowing the spacer to be arranged in the well tubular, a first seal collar (11) assembly and a second seal collar (12) assembly arranged opposite ends of the tubular spacer, each seal collar assembly comprising an activator ring (15, 16) and an annular seal collar (17, 18), the activator rings being interconnected by a cylindrical system (20) of shape memory alloy which system contracts when the temperature of the cylindrical system reaches the transition temperature of the shape memory alloy, and wherein each annular seal collar is arranged so as to be compressed against the inner surface of the well tubular upon contraction of the cylindrical system (20) of shape memory alloy.
Inventors:
BRAITHWAITE STEPHEN RICHARD
HEIJNEN WILHELMUS HUBERTUS PAU
KAPTEIJN PIETER KAREL ANTON
HEIJNEN WILHELMUS HUBERTUS PAU
KAPTEIJN PIETER KAREL ANTON
Application Number:
PCT/EP2000/011904
Publication Date:
August 15, 2002
Filing Date:
November 24, 2000
Export Citation:
Assignee:
SHELL INT RESEARCH (NL)
SHELL CANADA LTD (CA)
SHELL CANADA LTD (CA)
International Classes:
E21B29/10; E21B33/124; E21B33/128; E21B33/13; E21B33/14; (IPC1-7): E21B29/10; E21B33/124; E21B33/128
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