Fluid loss control additives for oil well cementing compositions
    2.
    发明授权
    Fluid loss control additives for oil well cementing compositions 失效
    油井固井组合物的流体损失控制添加剂

    公开(公告)号:US5228915A

    公开(公告)日:1993-07-20

    申请号:US981921

    申请日:1992-11-23

    Abstract: A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a blend of a copolymer (i) of acrylamide/vinyl imidazole in a weight percent ratio of from about 95:5 to 5:95, said copolymer (i) having a molecular weight range of from about 100,000 to 3,000,000, and a copolymer (ii) of vinyl pyrrolidone and the sodium salt of vinyl sulfonate in a weight percent ratio of 80:20 to 20:80, said copolymer (ii) having a molecular weight range of from about 100,000 to 3,000,000. The blend is comprised of a weight percent ratio of copolymer (i) to copolymer (ii) in the range of 20:80 to 80:20. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

    Abstract translation: 用于固井油,气和水井的固井组合物,包括水,水硬性水泥和有效量的水溶性流体损失添加剂,其由丙烯酰胺/乙烯基咪唑共聚物(i)的共混物组成,其重量百分比为 约95:5至5:95,所述共聚物(i)的分子量范围为约100,000至3,000,000,和乙烯基吡咯烷酮和乙烯基磺酸钠盐的共聚物(ii)的重量比为80: 20至20:80,所述共聚物(ii)的分子量范围为约100,000至3,000,000。 共混物由共聚物(i)与共聚物(ii)的重量百分比的比例在20:80至80:20的范围内组成。 组合物还可任选地包括分散剂如钠盐或钾盐或磺化萘甲醛缩合物。

    Water-thickening copolymers of acrylic and N-alkylmaleamic monomers
    5.
    发明授权
    Water-thickening copolymers of acrylic and N-alkylmaleamic monomers 失效
    丙烯酸和N-烷基马来酰亚胺单体的增稠共聚物

    公开(公告)号:US5880236A

    公开(公告)日:1999-03-09

    申请号:US47159

    申请日:1993-04-13

    Abstract: Water-thickening copolymers are obtainable by copolymerization of(A) one or more monomers of the formula IR.sup.1 HC.dbd.CR.sup.2 R.sup.3 IwhereR.sup.1 and R.sup.2 can be identical or different and each is H or C.sub.1 -C.sub.5 -alkyl, andR.sup.3 is ##STR1## where R.sup.1 and R.sup.2 can be identical or different and each is H or C.sub.1 -C.sub.5 -alkyl,R.sup.4 is H or C.sub.1 -C.sub.5 -alkyl,R.sup.5 is C.sub.1 -C.sub.4 -alkylene,R.sup.6 and R.sup.7 can be identical or different and each is H or C.sub.1 -C.sub.3 -alkyl, andM is hydrogen or an alkali metal, 1/2 alkaline earth metal or ammonium ion, and(B) one or more monomers of the formula IIa or IIb ##STR2## where R.sup.1 and R.sup.2 can be identical or different and each is H or C.sub.1 -C.sub.5 -alkyl,R.sup.4 is H or C.sub.1 -C.sub.5 -alkyl,X is --COOM where M is hydrogen or alkali metal, 1/2 alkaline earth metal or ammonium ion,Y is ##STR3## where R.sup.8 is C.sub.6 -C.sub.30 -alkyl, alkylaryl or aryl and R.sup.9 is H, C.sub.1 -C.sub.30 -alkyl, alkylaryl or aryl, andA and B are different and each has the meaning of X or Y.

    Abstract translation: 水增稠共聚物可以通过(A)一种或多种式I的化合物R1HC = CR2R3I的共聚获得,其中R1和R2可以相同或不同,并且各自为H或C1-C5-烷基,R3为< 其中R 1和R 2可以相同或不同,且各自为H或C 1 -C 5 - 烷基,R 4为H或C 1 -C 5 - 烷基,R 5为C 1 -C 4亚烷基,R 6和 R7可以相同或不同,分别为H或C1-C3-烷基,M为氢或碱金属+ E,fra 1/2 + EE碱土金属或铵离子,(B)一种或多种单体 式IIa或IIb其中R 1和R 2可以相同或不同并且各自为H或C 1 -C 5 - 烷基,R 4为H或C 1 -C 5 - 烷基,X为-COOM,其中M为氢 或碱金属,+ E,fra 1/2 + EE碱土金属或铵离子,Y是其中R 8是C 6 -C 30 - 烷基,烷基芳基或芳基,R 9是H,C 1 -C 30 - 烷基,烷基芳基或 芳基,A和B不同,各自具有X或Y的含义。

    Fluid loss control additives for oil well cementing compositions
    6.
    发明授权
    Fluid loss control additives for oil well cementing compositions 失效
    油井固井组合物的流体损失控制添加剂

    公开(公告)号:US5046562A

    公开(公告)日:1991-09-10

    申请号:US645912

    申请日:1991-01-22

    Abstract: A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a blend of a copolymer of acrylamide/vinyl imidazole in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000, and a terpolymer of acrylamide/acrylamidomethylpropane sulfonic acid sodium salt/vinyl imidazole in a weight percent ratio of 60:20:20, said terpolymer having a molecular weight range of from about 100,000 to 3,000.000. The blend is comprised of a weight percent ratio of copolymer to terpolymer in the range of 20:80 to 80:20. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

    Abstract translation: 用于固井油,气和水井的固井组合物,包括水,水硬性水泥和有效量的水溶性流体损失添加剂,其由丙烯酰胺/乙烯基咪唑共聚物的共混物组成,其重量比为约95: 5至5:95,所述共聚物的分子量范围为约100,000至3,000,000,丙烯酰胺/丙烯酰胺基甲基丙磺酸钠盐/乙烯基咪唑的三元共聚物的重量比为60:20:20,所述三元共聚物具有 分子量范围为约100,000至3,000,000。 共混物由共聚物与三元共聚物的重量百分数比在20:80至80:20的范围内组成。 组合物还可任选地包括分散剂如钠盐或钾盐或磺化萘甲醛缩合物。

    Fluid loss control additives for oil well cementing compositions
    7.
    发明授权
    Fluid loss control additives for oil well cementing compositions 失效
    油井固井组合物的流体损失控制添加剂

    公开(公告)号:US5025040A

    公开(公告)日:1991-06-18

    申请号:US535625

    申请日:1990-06-11

    Abstract: A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a blend of a copolymer of acrylamide/vinyl imidazole in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000, and a terpolymer of acrylamide/acrylamidomethylpropane sulfonic acid sodium salt/vinyl imidazole in a weight percent ratio of 60:20:20, said terpolymer having a molecular weight range of from about 100,000 to 3,000,000. The blend is comprised of a weight percent ratio of copolymer to terpolymer in the range of 20:80 to 80:20. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

    Abstract translation: 用于固井油,气和水井的固井组合物,包括水,水硬性水泥和有效量的水溶性流体损失添加剂,其由丙烯酰胺/乙烯基咪唑共聚物的共混物组成,其重量比为约95: 5至5:95,所述共聚物的分子量范围为约100,000至3,000,000,丙烯酰胺/丙烯酰胺基甲基丙磺酸钠盐/乙烯基咪唑的三元共聚物的重量比为60:20:20,所述三元共聚物具有 分子量范围为约100,000至3,000,000。 共混物由共聚物与三元共聚物的重量百分数比在20:80至80:20的范围内组成。 组合物还可任选地包括分散剂如钠盐或钾盐或磺化萘甲醛缩合物。

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