公开(公告)号：US11261365B2

公开(公告)日：2022-03-01

申请号：US16190904

申请日：2018-11-14

Applicant: Schlumberger Technology Corporation

Inventor： Cyril Terrier

IPC: E21B33/14 ,  C09K8/467 ,  C09K8/48 ,  C09K8/46 ,  C04B28/18 ,  C04B28/04 ,  C04B7/02 ,  C04B14/04 ,  C04B14/30 ,  C04B14/36 ,  C04B18/08 ,  C09K8/473 ,  C04B111/00

Abstract: Portland cement compositions for use in high-temperature, high pressure wells are designed such that the lime-to-silica molar ratio is between 0.5 and 1.0, and the alumina-to-silica molar ratio is between 0.05 and 0.10. After curing and setting at temperatures between 85° C. and 300° C., the cement compositions form tobermorite as an initial and permanent calcium silicate hydrate phase.

公开(公告)号：US20190144734A1

公开(公告)日：2019-05-16

申请号：US16190904

申请日：2018-11-14

Applicant: Schlumberger Technology Corporation

Inventor： Cyril Terrier

IPC: C09K8/467 ,  C09K8/48 ,  C09K8/473 ,  C04B7/02 ,  C04B14/04 ,  C04B14/30 ,  C04B18/08 ,  C04B14/36 ,  E21B33/14

Abstract: Portland cement compositions for use in high-temperature, high pressure wells are designed such that the lime-to-silica molar ratio is between 0.5 and 1.0, and the alumina-to-silica molar ratio is between 0.05 and 0.10. After curing and setting at temperatures between 85° C. and 300° C., the cement compositions form tobermorite as an initial and permanent calcium silicate hydrate phase.

公开(公告)号：US20170107420A1

公开(公告)日：2017-04-20

申请号：US15127234

申请日：2015-03-31

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Cyril Terrier ,  Isabelle Couillet ,  Hafida Achtal

IPC: C09K8/487 ,  C09K8/473 ,  E21B33/14 ,  C04B28/04 ,  C04B24/22 ,  C04B24/38 ,  C09K8/48 ,  C09K8/46

CPC classification number: C09K8/487 ,  C04B24/22 ,  C04B24/383 ,  C04B28/02 ,  C04B28/04 ,  C04B2103/408 ,  C04B2103/46 ,  C09K8/46 ,  C09K8/467 ,  C09K8/473 ,  C09K8/48 ,  E21B33/14 ,  C04B24/2647 ,  C04B22/124 ,  C04B24/32 ,  C04B2103/50

Abstract: Hydroxyethylcellulose (HEG) may be used to provide fluid-loss control in well-cement slurries HECs that have a molecular weight above 600,000, a degree of substitution higher than 1.9 and a molar substitution above 2.0 are particularly useful in that they not only provide fluid-loss control, but also may be used as a cement extender. Furthermore, the retardation effect may be reduced.