Well servicing fluid for trenchless directional drilling
CA 2285309 A1 · Owner: Halliburton Energy Services, Inc. · Inventors: Liao, W. Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a composition comprising a water swellable clay and particularly , a sodium montmorillonite clay such as bentonite sodium carbonate, and a water-, soluble biopolymer and particularly a xanthan biopolymer. The composition when mixed with fresh water forms an aqueous drilling mud having the desirable fluid properties including a high gel strength profile of 10-second/10minute/30-minute gel and a low API fluid loss for use in trenchless directional drilling including mini-horizontal directional drilling guided , boring, auger boring, pipe jacking microtunneling, and river crossing. The composition mixed with an aqueous medium provides a water-based drilling mud applicable to …
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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 March 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2020.
- 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.