公开(公告)号：US06558461B2

公开(公告)日：2003-05-06

申请号：US09990733

申请日：2001-11-21

申请人： Stuart E. Lebo, Jr. ,  Shane L. Resch

发明人： Stuart E. Lebo, Jr. ,  Shane L. Resch

IPC分类号： C04B2418

CPC分类号： C04B24/24 ,  C04B24/18 ,  C04B28/02 ,  C09K8/46 ,  C09K8/473 ,  C04B24/124 ,  C04B24/16 ,  C04B38/10 ,  C04B24/12 ,  C04B2103/22

摘要： An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are provided. The set retarder additive includes a blend of a sulfonated lignin, preferably a lignosulfonate, with an alkali lignin, preferably a kraft lignin, having an organic sulfur content of 0-3.5% by weight in a ratio of about 6:4 to 8:2. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.

公开(公告)号：US06372037B1

公开(公告)日：2002-04-16

申请号：US09569422

申请日：2000-05-12

申请人： Stuart E. Lebo, Jr. ,  Shane L. Resch

发明人： Stuart E. Lebo, Jr. ,  Shane L. Resch

IPC分类号： C04B2418

CPC分类号： C04B24/24 ,  C04B24/18 ,  C04B28/02 ,  C09K8/46 ,  C09K8/473 ,  C04B24/124 ,  C04B24/16 ,  C04B38/10 ,  C04B24/12 ,  C04B2103/22

摘要： An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are provided. The set retarder additive includes a blend of a sulfonated lignin, preferably a lignosulfonate, with an alkali lignin, preferably a kraft lignin, having an organic sulfur content of 0-3.5% by weight in a ratio of about 6:4 to 8:2. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.

摘要翻译： 提供了用于发泡水泥的改进的非分散组合缓凝剂添加剂，含有添加剂的水泥组合物，以及在井眼穿透的地下区域中的固井方法。 所述缓凝剂添加剂包括磺化木质素，优选木质素磺酸盐与碱性木质素，优选硫酸盐木质素的混合物，所述碱性木质素，优选硫酸盐木质素，有机硫含量为0-3.5重量％，比例为约6:4至8:2 。 所述方法基本上包括以下步骤：制备由水硬性水泥，非分散组合缓凝剂，足够的水形成浆料，足够的气体以使浆料发泡的发泡水泥组合物和发泡和泡沫稳定表面活性剂 足以促进泡沫的形成并稳定泡沫水泥组合物。