Invention Grant
- Patent Title: Drilling fluid and method for drilling in coal-containing formations
- Patent Title (中): 含煤层钻井液和钻井方法
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Application No.: US12529583Application Date: 2008-03-03
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Publication No.: US08387723B2Publication Date: 2013-03-05
- Inventor: Stefan Alexandru Stoian , Carl Keith Smith
- Applicant: Stefan Alexandru Stoian , Carl Keith Smith
- Applicant Address: CA Calgary
- Assignee: Tech-Star Fluid Systems Inc.
- Current Assignee: Tech-Star Fluid Systems Inc.
- Current Assignee Address: CA Calgary
- Agency: Bennett Jones LLP
- International Application: PCT/CA2008/000425 WO 20080303
- International Announcement: WO2008/106786 WO 20080912
- Main IPC: E21B21/00
- IPC: E21B21/00 ; C09K8/05 ; C09K8/16
Abstract:
A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
Public/Granted literature
- US20100089650A1 DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS Public/Granted day:2010-04-15
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