Offshore staff

European patent number EP1719873
Appl. Data: EP05290982 20050504
Applicant: SERVICES PETROLIERS SCHLUMBERGER
SCHLUMBERGER TECHNOLOGY B.V.
SCHLUMBERGER HOLDINGS LIMITED
PRAD Research and Development N.V.
Schlumberger Oilfield Assistance Ltd.
Inventors: Vercaemer, Claude Orban, Jacques

An expandable sleeve for use in a well, comprises a tubular structure including an external sealing layer comprising a compliant material; an intermediate expandable tubular body made from a plastically deformable material; and an internal spring structure such as a helically wound spring; wherein the external sealing layer is disposed on the outer surface of the tubular body, and the internal spring structure is disposed inside the tubular body and acts so as to exert a radial force on the body when in an expanded state. Such a sleeve can be used to seal off perforations and in well completions using slotted liners or in drilling applications.

11/21/2006