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发明授权
CN101318799B 高强度低自由水低密度油井水泥浆 有权 转让

高强度低自由水低密度油井水泥浆
摘要：
本发明公开了一种高强度低自由水低密度水泥浆，包括如下组分：渤海海水29～36％、固体低密度水泥材料61.7～68.6％、液体外加剂2.3～2.4％；其中，所述百分比为重量百分比。本发明的固井低温高强度低自由水低密度固井水泥浆与常规低温低密度水泥浆相比，自由水小、强度高；其稠化时间更易控制，作业程序更为简单。本发明的水泥浆密度在1.50±0.02g/cm3之间，强度(24h、常压、50℃)≥15MPa；流动度≥24cm；自由水≤1ml；适用温度27～60℃；稠化时间100～400min可调。
摘要（英）：

The invention discloses a high intensity low free water low density cement paste. The compositions by weight percentage of the cement paste are: 29 to 36 percent of Bohai seawater, 61.7 to 68.6 percent of solid low density cement material, and 2.3 to 2.4 percent of fluid additive. Compared with the conventional low temperature low density cement paste, the well cementation low temperature high intensity low free water low density well cementation cement paste has low free water, high intensity, easily controlled thickening time, and simpler operation routine. The density of the cement paste is between 1.48 and 1.52g/cm<3>; the intensity (24h, constant pressure and 50 DEG C) is more than or equal to 15MPa; the mobility is more than or equal to 24 centimeters; the free water is smaller than or equal to 1 ml; the suitable temperature is between 27 and 60 DEG C; and the thickening time is adjusted between 100 and 400 minutes.

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