Wells – Processes – Placing or shifting well part
Reexamination Certificate
2006-12-26
2006-12-26
Bagnell, David (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S206000, C166S373000
Reexamination Certificate
active
07152687
ABSTRACT:
A ported expandable tubing having an outer valve sleeve which closes the ports upon tubing expansion. An elastomeric sealing member may be carried between the tubing and the valve sleeve to improve closing of the ports. The elastomeric sealing member may be shaped and positioned to operate as a check valve before tubing expansion. Various fluids may be flowed from the ported tubing into a borehole, or from the borehole into the ported tubing, before tubing expansion. After expansion, the ports are closed by residual clamping forces between the sleeve and tubing. By applying sufficient internal pressure to overcome the clamping forces, fluids can be flowed from the tubing into the borehole after expansion.
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Bagnell David
Bomar Shane
Halliburton Energy Service,s Inc.
Piper Michael W.
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