Hydraulic test tool and method
CA 1092968 A · Owner: Rucker Company (The) · Inventors: Walker, Stephen J.; Lamb, Raymond K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A test tool and a method of testing is disclosed for testing for leaks in apparatus having a bore and a landing surface such as blowout preventers, wellheads, casing hangars and the, like. The test tool is connected to pipe having a passage therethrough, which has a landing surface for landing on the landing surface of the bore, bypass passages automatically closed on landing and during testing, packing means for effecting a seal in the bore, a pressure relief valve and hydraulic passages communicating with the passage in the pipe the packing means, and the relief valve which opens at a predetermined pressure. The packing is set either hydraulically, mechanically or by a combination …
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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 January 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 1998.
- 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.