Well cementing apparatus
CA 1254504 A · Owner: Hughes Tool Company · Inventors: Gilbert, Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cementing apparatus is shown for use with a wireline run setting tool. The apparatus includes a retainer with external gripping and sealing members for sealing off a lower region of the well below the sealing members. The cement retainer has a plurality of cementing ports at the lower end thereof which communicate the interior of the retainer with the lower well region. A sliding valve located within the lower end of the retainer can be moved between open and closed positions to control communication of fluids between the interior of the retainer and the lower well region. An inner body is initially received within the interior of the retainer and is retained in position by means of a …
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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 May 23, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 23, 2006.
- 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.