Invention Grant
- Patent Title: Drilling fluid and method for drilling in coal-containing formations
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Application No.: US13817635Application Date: 2011-08-26
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Publication No.: US09850416B2Publication Date: 2017-12-26
- Inventor: Carl Keith Smith
- Applicant: Carl Keith Smith
- Applicant Address: CA Calgary
- Assignee: CANADIAN ENERGY SERVICES L.P.
- Current Assignee: CANADIAN ENERGY SERVICES L.P.
- Current Assignee Address: CA Calgary
- Agency: Bennett Jones LLP
- International Application: PCT/CA2011/000973 WO 20110826
- International Announcement: WO2012/024786 WO 20120301
- Main IPC: E21B21/00
- IPC: E21B21/00 ; C09K8/05 ; C09K8/16 ; C09K8/20 ; E21B21/06
Abstract:
A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
Public/Granted literature
- US20130206479A1 DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS Public/Granted day:2013-08-15
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