Rare earth-containing compounds to enhance performance of downhole treatment compositions
US10287474B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | May 10, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | May 10, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A downhole treatment composition comprises a rare earth-containing compound comprising one or more of the following: scandium; yttrium; lanthanum; cerium; praseodymium; neodymium; promethium; samarium; lutetium; europium; gadolinium; terbium; dysprosium; holmium; erbium; thulium; or ytterbium, wherein the downhole treatment composition is a cement slurry, a drilling fluid, or a spacer fluid. Also disclosed are methods of cementing a wellbore, methods of displacing a first fluid, and methods of drilling a wellbore in a subterranean formation using the cement slurry, the spacer fluid, or the drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.