Patent · US Active

Compositions and methods for well cementing

US11920079B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

Bipin Jain · Sugar Land, US
Shameed Ashraf · Kuala Lumpur, MY

Key dates

Filing date	Dec 10, 2021
Grant date	Mar 5, 2024
Priority date	—
Expiry date	Dec 10, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/10
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The effectiveness of expansive cement systems may be diluted when, during a well cementing operation, commingling takes place between the cement slurry and a spacer fluid, a drilling fluid, or both. Incorporating expansive agents in the spacer fluid or drilling fluid may reduce or negate the loss of expansion at the cement slurry/spacer interface or the cement slurry/drilling fluid interface, thereby promoting zonal isolation throughout the cemented interval.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.