Method and apparatus for measuring the bubble point of oil in an underground formation
CA 1288614 C · Owner: Exbrayat, Jacques · Inventors: Glotin, Bernard J.P.; Exbrayat, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to measuring the bubble point of oil down a well drilled into an underground formation. The pressure is measured by means of apparatus lowered down the well. The apparatus comprises a chamber (2) in which a small quantity of oil is confined in a volume which is variable by means of a needle (3) having portions of different diameters (3a 3b) capable of, being inserted to a greater or lesser extent into the chamber (2) under drive from a motor (7). Values of pressure inside the chamber and of chamber volume are respectively measured by a manometer (11) and by a displacement sensor (12) connected to the needle (3) and are transmitted to the surface.
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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 September 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2008.
- 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.