Combined fracturing process for stimulation of oil and gas wells
CA 1047393 A · Owner: Canadian Fracmaster Ltd. · Inventors: Hussin, Clint
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of forming fractures and placing proppants therein which comprises creating, a foam having a down-well Mitchell quality of from about 0.53 to 0.99 and passing that foam down the well in admixture with a particulate proppant in an amount of up to three pounds of proppant per gallon of foam, then decreasing the gas volume in said foam, whereby the proppant carrying medium being passed down the well changes from a foam to a liquid. The proppant concentration is decreased as the change occurs from foam to liquid so that the proppant material will not deposit out prematurely in the well. Once liquid flow has been established the proppant to fluid ratio, …
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 January 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 1996.
- 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.