Method for reducing formation damage when drilling for oil and gas
CA 2186203 C · Owner: Bennion, Douglas Brant · Inventors: Bennion, Douglas Brant; Masikewich, James Darrell; Churcher, Peter Lawrence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of reducing formation damage when drilling for oil and gas. Firstly, determining initial water hydrocarbon, and gas saturation in the porous formation under consideration. Secondly determining a preferential wettability of the porous formation. Thirdly, determining potential damaging effects due to aqueous phase trapping as a result of increasing water saturation in the porous formation. Fourthly determining an, alcohol type and concentration that will reduce severity of aqueous phase trapping. Fifthly, incorporating the alcohol type and concentration into a drilling fluid. The alcohol concentration will not less than 1% by weight of the drilling fluid. Sixthly, pumping the …
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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
- Filed September 23, 1996 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2018.
- 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
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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.