| 摘要 |
A deformable member can be used in a well tool for use in downhole oil/gas wells. In one embodiment, a deformable member ( 46 ) is described which is deformable between undeformed and deformed positions, and comprises a generally hollow cylindrical body ( 48 ) defining a wall ( 50 ). The wall ( 50 ) includes three circumferential lines of weakness in the form of grooves, with two grooves ( 52, 54 ) provided in an outer surface ( 56 ) of the member wall ( 50 ), and the other groove ( 58 ) provided in an inner surface ( 60 ). The member ( 46 ) is deformed outwardly by folding about the lines of weakness ( 52, 54, 56 ) and is used in particular to obtain sealing contact with a tube in which the member ( 46 ) is located.
|
