Spacer fluids containing swellable abrasive particles
US12305115B2 · kind B2 · utility
0Cited by
34References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2020 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Jun 26, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Spacer fluids or chemical washes are prepared that comprise water, a hydraulic cement and particles of an oil-absorbent material. The particles are present in an amount sufficient to alter a property of a non-aqueous drilling fluid. The spacer fluid or chemical wash is placed in a subterranean well, whereupon the spacer fluid or chemical wash contacts residual drilling fluid on casing and formation surfaces. The oil-absorbent material in the spacer fluid or chemical wash may reduce the mobility of the drilling fluid, thereby improving zonal isolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.