| 发明名称 | Oil well cementing products with synthetic gypsum and methods | ||
| 摘要 | An oil well cementing product comprising DTPA-coated synthetic calcined gypsum, at least one accelerator, at least one retarder, at least one plasticizer and limestone is provided. Also provided are methods for cementing oil wells with mixtures comprising DTPA-coated synthetic calcined gypsum, at least one accelerator, at least one retarder, at least one plasticizer and limestone. | ||
| 申请公布号 | US9346996(B1) | 申请公布日期 | 2016.05.24 |
| 申请号 | US201514623724 | 申请日期 | 2015.02.17 |
| 申请人 | UNITED STATES GYPSUM COMPANY | 发明人 | Lettkeman Dennis Mark;Wilson John Wesley;Blackburn Doug;Ball Brian K.;Kaligian Raymond A.;Cloud Mike L. |
| 分类号 | C04B11/00;C09K8/46;E21B33/138 | 主分类号 | C04B11/00 |
| 代理机构 | Greer, Burns & Crain, Ltd. | 代理人 | Greer, Burns & Crain, Ltd. ;Wishnow Brian;Petti Philip T. |
| 主权项 | 1. An oil well cementing composition comprising diethylene-triamine-pentaacetic acid (DTPA)-coated synthetic calcined gypsum, at least one accelerator, at least one retarder, at least one plasticizer and limestone. | ||
| 地址 | Chicago IL US | ||