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Expired Canadian patentCanada

Hydraulic fracturing method

CA 1237654 A · Owner: Mobil Oil Corporation · Inventors: Stowe, Lawrence R.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The improved method includes hydraulic fracturing in combination with a method for controlling fines or sand in an unconsolidated or loosely consolidated formation or reservoir containing hydrocarbonaceous fluids where said reservoir is penetrated by at least one wellbore. By control of the critical salinity rate and the critical fluid flow velocity of the formation surrounding the wellbore, the fines or sand are controlled to enhance the production of hydrocarbonaceous fluids.

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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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 30, 1985
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237654 A
Classification (IPC)E21B43/26 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedSep 30, 1985Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.