发明名称 |
High temperature retarders for oil field cements, cement slurries and corresponding cementing processes |
摘要 |
The invention relates to the cementing of high temperature wells. A cement retarder comprises a phosphonic acid derivative combined with borax in a weight ratio of phosphonic acid derivative to borax of about 0.025 to about 0.2. A long pumping time is realized with rapid compressive strength development following placement.
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申请公布号 |
US5503671(A) |
申请公布日期 |
1996.04.02 |
申请号 |
US19950438673 |
申请日期 |
1995.05.10 |
申请人 |
DOWELL, A DIVISION OF SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
CASABONNE, JEAN-MICHEL;JOUVE, MARC;NELSON, ERIK |
分类号 |
C04B24/00;C09K8/46;(IPC1-7):C04B24/00 |
主分类号 |
C04B24/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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