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    Expandable cement composition
    82.
    发明公开
    Expandable cement composition 失效
    可膨胀水泥组合物

    公开(公告)号：EP0254342A3

    公开(公告)日：1989-10-11

    申请号：EP87201260.4

    申请日：1987-07-03

    申请人： DOWELL SCHLUMBERGER INCORPORATED

    发明人： Spangle, Lloyd B.

    IPC分类号： C04B22/06 ,  E21B33/14

    CPC分类号： C04B2/102 ,  C04B22/066 ,  C04B2111/34 ,  C09K8/42 ,  C09K8/46 ,  C04B22/008

    摘要： Particulate magnesium oxide prepared by calcining magnesium oxide at between about 1100°C and about 1500°C. At least about 80% of the magnesium oxide particles are between about 150 microns to about 400 microns in diamater. This magnesium oxide is capable of producing expansion in set cements when the temeperature thereof is at least about 60°C. Preferably the magnesium oxide has been calcined at between about 1100°C to about 1300°C for about 1 to about 3 hours, and at least about 80% of the particles are between about 200 microns to about 325 microns. Further, the BET surface area of the particles is preferably between about 0.8 to about 1.8 m²/g, and the acid neutralization time (using the method described) is between about 15 to 20 minutes, and further preferably between about 17 to about 25 minutes. Expandable cement compositions using such magnesium oxide, and a method for using them in cementing of wells, are also disclosed.

    PROCESS FOR PLUGGING A SUBTERRANEAN FORMATION
    87.
    发明公开
    PROCESS FOR PLUGGING A SUBTERRANEAN FORMATION 失效
    方法用于密封地下岩层。

    公开(公告)号：EP0238485A1

    公开(公告)日：1987-09-30

    申请号：EP85904941.0

    申请日：1985-09-30

    申请人： THE DOW CHEMICAL COMPANY

    发明人： EILERS, Louis, H.

    IPC分类号： C04B28 ,  C09K8

    CPC分类号： C09K8/46 ,  C04B28/26 ,  C04B28/34 ,  C09K8/5045 ,  C04B7/02 ,  C04B22/16 ,  C04B12/04

    摘要： Lorsqu'elles sont ajoutées, mélangées ou autrement mises en contact avec des boues de ciment hydraulique, des solutions aqueuses de silicate provoquent une gélification très rapide et une prise accélérée de la composition de ciment hydraulique. On a désormais découvert qu'il était possible de contrôler ce phénomène de gélification rapide/prise accélérée et de le retarder sensiblement en incorporant un sel de phosphate inorganique hydrosoluble dans un fluide séparateur aqueux positionné entre ladite solution de silicate et ladite boue de ciment tandis que ces matériaux sont injectés de manière séquentielle dans une formation souterraine.

    Glucoheptonate composition
    90.
    发明公开
    Glucoheptonate composition 失效
    Glucoheptonat-Zusammensetzung。

    公开(公告)号：EP0032730A1

    公开(公告)日：1981-07-29

    申请号：EP81100279.9

    申请日：1981-01-15

    申请人： DIAMOND SHAMROCK CORPORATION

    发明人： Villa, Jose, L. ,  Sinka, Joseph V. ,  Fleming, Joseph P.

    IPC分类号： C07C59/105 ,  C07C51/50 ,  C04B7/35 ,  C04B13/28

    CPC分类号： C09K8/46 ,  C04B24/22 ,  C07C51/47 ,  C07C51/50 ,  C07C59/105

    摘要： Byproduct ammonium ions remaining in an aqueous solution of a water soluble glucoheptonate salt after its synthesis are reacted with the free acid form of a naphthalenesulfonic acid-formaldehyde condensation product to obtain an aqueous composition which does not produce an ammonia odor when introduced into aqueous media having a pH above 9. The aqueous composition can be dried to obtain a flowable powder. Both the aqueous composition and flowable powder are useful as additives in industrial products. They may be used to prolong the time of hydration of cement.

    摘要翻译： 将其合成后残留在水溶性葡庚糖酸盐水溶液中的产物铵离子与游离酸形式的萘磺酸 - 甲醛缩合产物反应，得到当引入水性介质时不产生氨气味的水性组合物 pH高于9.水性组合物可以干燥以获得可流动的粉末。 水性组合物和可流动粉末都可用作工业产品中的添加剂。 它们可用于延长水泥的水化时间。