Arrangement to prevent premature expansion of seal means
CA 1212623 A · Owner: Texas Iron Works, Inc. · Inventors: Braddick, Britt O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 member 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 retaining member is on a longitudinally extending radially flex-, ible portion of the retaining member. An annular shoulder intermediate the ends …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 14, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.