Well cementing method using HMHPG filtrate reducer
US6257336A · kind A · utility
26Cited by
10References
11Claims
0Family size
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Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
For controlling filtration loss during the installation of climber cement in a well, the procedure entails the addition of a specific quantity of at least one derivative of galactomannan, hydrophilically and hydrophobically modified, a hydrophobically modified hydroxy propyl guar (HMHPG).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.