发明名称 |
Weight materials for use in cement, spacer and drilling fluids |
摘要 |
A drilling fluid, spacer fluid and cementing compositions for use in subterranean wells are disclosed along with methods for making using same, where the compositions include a weighting system having an effective amount of a metal silicon alloy, mixtures of metal silicon alloys, or mixtures of metal silicon alloys and conventional weighting agents, to produce compositions having a desired high density, while retaining other fluid properties such as pumpability, gas tight sealing, low tendency to segregate, and reduced high temperature cement strength retrogression. |
申请公布号 |
US9062241(B2) |
申请公布日期 |
2015.06.23 |
申请号 |
US201012892584 |
申请日期 |
2010.09.28 |
申请人 |
Clearwater International LLC |
发明人 |
Zamora Frank;Bramblett Marilyn J.;Hernandez Mario B.;Kakadjian Sarkis R.;Powell Ron;Falana Olusegun Matthew |
分类号 |
C04B14/34;C09K8/48;C04B28/02;C09K8/03;C09K8/40;C09K8/493 |
主分类号 |
C04B14/34 |
代理机构 |
|
代理人 |
Strozier Robert W |
主权项 |
1. A downhole cement composition comprising:
a pumpable cement slurry including:
water;a hydraulic cement; andfrom 25 wt. % to 110 wt. % of a primary weighting agent, based on the weight of the hydraulic cement in the absence of the primary weighting agent, including a ferrosilicon having a density of at least 6.0 g/cm3, where the primary weighting agent increases the density of the downhole cement composition, while maintaining other properties including at least pumpability, gas tight sealing, reduced tendency to segregate, and/or reduced high temperature cement strength retrogression, and where the composition has (1) a plastic viscosity at least 10% lower than a composition including an equivalent amount of hematite as the weighting agent, (2) a yield point at least about 15% lower than a composition including an equivalent amount of hematite as the weighting agent, (3) a cure rate at least 10% faster than a composition including an equivalent amount of hematite as the weighting agent, and (4) a cure strength after 6 hours of curing and a final cure strength at least 10% higher than a composition including an equivalent amount of hematite as the weighting agent. |
地址 |
Houston TX US |