Aqueous spacer composition compatible with drilling muds and cement slurries including saline slurries, and application thereof to drilling oil and gas wells
CA 1264927 C · Owner: Jennings, David Brian · Inventors: Jennings, David Brian; Parcevaux, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous spacer composition compatible with, drilling muds and cement slurries including saline slurries, and application there of drilling oil and gas wells. Preferred spacer bases in accordance with the invention comprise a biopolymer of the type produced by Azotobacter indicus, a high molecular weight sulfanated styrene or toluene-styrene polymer and a, dispersing agent. This base fluid has no solid particles. The final spacer composition additionally contains a weighting agent (barite) and water. Total compatibility is provided with muds and/or cement slurries whether or not they are saline together with, excellent fluid loss controlling rheological, and, anti-settling properties. A …
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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.