07159673 is referenced by 3 patents and cites 14 patents.

A drilling system and method for drilling a borehole into an earth formation is provided. The drilling system has a drill string having a lower section provided with a sleeve which is radially expandable from a retracted mode in which the sleeve extends around the lower drill string section and is releasably connected thereto, to an expanded mode in which the sleeve is released from the lower drill string section and is expanded against the borehole wall. The drilling system further has a control means for selectively releasing the sleeve from the lower drill string section and expanding the sleeve against the borehole wall.

Title
Drilling system with expandable sleeve
Application Number
10/475920
Publication Number
7159673 (B2)
Application Date
April 26, 2002
Publication Date
January 9, 2007
Inventor
Robert Albertus Van Dijk
Arnhem
NL
Assignee
Shell Oil Company
TX, US
IPC
E21B 7/00
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