Process for plugging subterranean formations, notably in the domain of oil field services and corresponding applications
CA 1283848 C · Owner: Etudes Et Fabrication Dowell Schlumberger · Inventors: Parcevaux, Philippe; Perthuis, Herve; Oberste-Padtberg, Rudiger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a new process for plugging and / or consolidating a permeable geological formation, notably when traversed by a borehole. The process, according to this invention comprises the following steps : a) insertion into the formation of an overdelayed gelling compound composed of a gelable material and a hardener for, which the setting time is considerably longer than the suitable positioning time for the composition in, such a way that this permeates the formation over a significant distance. b) insertion, after a mechanical or fluid plug, of a rapid-action gelling agent, which causes the instantaneous gelling of that part of the overdelayed gelling compound in 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
- Granted May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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.