Invention Grant
- Patent Title: Flat rheology wellbore fluids for generating clean wellbores
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Application No.: US17291627Application Date: 2019-11-08
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Publication No.: US11624018B2Publication Date: 2023-04-11
- Inventor: Damian R. Vickers , Chemsseddine Bouguetta
- Applicant: Schlumberger Technology Corporation
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- International Application: PCT/US2019/060513 WO 20191108
- International Announcement: WO2020/097489 WO 20200514
- Main IPC: E21B33/14
- IPC: E21B33/14 ; C09K8/36 ; E21B21/00

Abstract:
A method of drilling a wellbore may include drilling the wellbore using a wellbore fluid that has rheological property values for 6 rpm, 10 minute gel, Yield Point, and/or 10 minute-to-10 second gel ratio that are +/20% of the mean values across a temperature range from 40° F. to 300° F.; and conditioning the wellbore with less than 2 hole volumes. The wellbore fluid may include an oleaginous external phase; a non-oleaginous internal phase; an amidoamine emulsifier stabilizing the non-oleaginous internal phase within the oleaginous external phase; at least two oil wetting agents; a rheology modifier; and a weighting agent having a d50 ranging from 5 to 10 μm.
Public/Granted literature
- US20210403789A1 FLAT RHEOLOGY WELLBORE FLUIDS FOR GENERATING CLEAN WELLBORES Public/Granted day:2021-12-30
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