Measure while drilling systems
CA 1268052 C · Owner: Goodsman, William Gordon · Inventors: Goodsman, William Gordon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a fluid communication device such as a measure-whiledrilling well-logging tool of the type in which the information concerning the downstream parameters that are measured is transmitted upstream, e.g. to the surface of the earth in the form of, positive pressure pulses in the drilling fluid a pressure modula, tor for generating the pulses is driven by the drilling fluid passing through the tool. The pressure modulator is controlled by a solenoid actuated latching means which has low power requirements as compared to known measure-while-drilling logging tools.
Read the whole patent
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 April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.