C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/00 (2006.01) C04B 24/26 (2006.01) E21B 33/13 (2006.01)
Patent
CA 2436378
A cement composition for use in borehole applications comprising hydraulic cement, sufficient water to form a slurry, and an effective amount of a resilience/toughness enhancing additive comprising a thermoplastic block copolymer having a tensile strength of from 500 to 4000 psi, a recoverable elongation of 200 to 1000 percent and exhibiting temperature stability in the range of 30° to 500°F, the cement composition being useful for forming seals at desired locations in wellbores or formations penetrated by wellbores by placing the composition in the desired location and permitting the composition to set.
Formulation de ciment destinée à des applications en forage composée d'un ciment hydraulique, d'eau en quantité suffisante pour former une boue, ainsi que d'une quantité efficace d'un additif améliorant la résilience et la résistance constitué d'un copolymère séquencé ayant une résistance à la traction de from 500 à 4 000 psi, un allongement rétractable de 200 à 1 000 %, et thermostable entre 30 et 500 degrés Fahrenheit. La formulation de ciment est utile pour sceller certains emplacements dans les puits ou les formations traversées par des puits; pour cela, on place la formulation à l'emplacement désiré, et on la laisse prendre.
Morgan Rickey L.
Ravi Krishna M.
Reddy B. Raghava
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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