Apparatus for carrying out underground measurements during drilling of underground strata
CA 1055009 A · Owner: Koolaj - Es Foldgazbanyaszati Ipari Kutato Laboratorium · Inventors: Toth, Zoltan; Zsoka, Istvan; Rakar, Geza
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns apparatus for performing underground measurements during drilling of underground strata using conventional measuring instruments. It comprises a closed instrument casing filled with oil, an adaptor coupling the casing to the drilling pipe a, spring holder connected to the instrument casing and carrying damping spring means, a helical plate controlling angular displacement and a piston-and-cylinder displacement control device a first bore in the, adaptor for conveying mud to a downward section of the drilling pipe a second closable bore in the adaptor for permitting mud to flow from the annular space around the pipe through the instrument casing and a, closable bore in …
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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 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- 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.