Invention Grant
- Patent Title: Cement retarder
- Patent Title (中): 水泥缓凝剂
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Application No.: US11965319Application Date: 2007-12-27
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Publication No.: US07896964B2Publication Date: 2011-03-01
- Inventor: Stephane Boulard , Jesse Lee
- Applicant: Stephane Boulard , Jesse Lee
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent David Cate; Robin Nava; Matthias Abrell
- Priority: EP06292073 20061228
- Main IPC: C04B24/04
- IPC: C04B24/04
Abstract:
The invention provides a cementitious composition for oilfield application comprising an organic retarder having at least one carboxylate group and copper ions such that a complex is made between copper ion and carboxylate group. Also a method to retard cementitious composition for oilfield application is disclosed, the method comprising the unique double step of adding an organic retarder having at least one carboxylate group and adding copper ions such that a complex is made between copper ion and carboxylate group.
Public/Granted literature
- US20080156231A1 Cement Retarder Public/Granted day:2008-07-03
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