Arrangement to prevent premature expansion of seal means

Details Arrangement to prevent premature expansion of seal means Arrangement to prevent premature expansion of seal means

E - Fixed Constructions

21

B

166/64

E21B 33/128 (2006.01) E21B 23/02 (2006.01) E21B 33/129 (2006.01)

Patent

CA 1212623

ARRANGEMENT TO PREVENT PREMATURE EXPANSION OF EXPANDABLE SEAL MEANS Abstract of the Disclosure A tubular member is provided with expandable seals which are expanded into sealing engagement with a surrounding surface by a sleeve actuating member on the tubular member. A releasable retaining member is secured to the tubular mem- ber and has shoulder means adjacent one end interlocked with shoulder means adjacent an end of the sleeve actuating member to retain the sleeve actuating member in nonexpanding seal position as the tubular member is lowered into position in the well bore. The shoulder means on the releasable retain- ing member is on a longitudinally extending, radially flex- ible portion of the retaining member. An annular shoulder intermediate the ends of the flexible portion engages the upper end of a liner in the well bore, and moves the flexible portion radially inwardly to disengage the interlocked shoul- der means, thus releasing the sleeve actuating means to expand the expandable seals.

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