Method and apparatus for calibrating radioactivity well logging tools
CA 1081865 A · Owner: Schlumberger Canada Limited · Inventors: Waggoner, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radioactivity well logging tool including a gamma radiation detector is field calibrated with the help of a flexible sheet having a radioactive substance dispersed therein which is, wrapped about the tool so as to completely surround the detector. The sheet is made of an elastomer such as polyurethane and the, radioactive substance is carnotite. This sheet is placed within a nylon sheath which has straps for holding the calibrator wrapped around the tool.
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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 July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
- 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.