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    METHOD OF CONTROLLING THE MOBILITY OF FLOWS THROUGH FISSURES, SLITS OR PORES
    2.
    发明专利
    METHOD OF CONTROLLING THE MOBILITY OF FLOWS THROUGH FISSURES, SLITS OR PORES 未知

    公开(公告)号：CA1230474A

    公开(公告)日：1987-12-22

    申请号：CA448606

    申请日：1984-03-01

    Applicant: HOECHST AG

    Inventor： HAAS RAIMUND ,  OHLENDORF DIETER ,  INTERTHAL WERNER

    IPC: C09K3/00 ,  C09K8/86 ,  C09K23/18 ,  E21B43/22

    Abstract: of the disclosure: Method of controlling the mobility of aqueous flows through fissures, slits or pores, in particular of flooding waters in tertiary production of crude oil, wherein cationic surfactants which, on measurement of the electric birefringence with a pulsed rectangular electrical field in pure aqueous solutions, give a measurement signal, from the decrease of which a relaxation time of 0.01 .mu.s to 10 ms, in particular of 0.1 .mu.s to 2 ms, results, are added to the aqueous medium. Preferred suit able cationic compounds are those of the general formula R1-K+A-in which R1 denotes C12-C26 alkyl or C12-C26 alkenyl, K+ denotes a group of the formula R2 denotes C1-C3-alkyl, preferably methyl, R'2 denotes C1-C3-alkyl, preferably methyl, R"2 denotes C1-C3-alkyl, preferably methyl, or R"2 denotes (CH2CH2O)xH, where x denotes from 1 to 3, preferably 1 to 2, and A? denotes an anion of the following formulae: SCN?, R3SO3?, where R3 is C6-C9-alkyl or -alkenyl and the sum of the carbon atoms in R1 and R3 should be at least 21; where Hal is chlorine or bromine, R4 is C1-C5-alkyl, C2-C5-alkenyl or C1-C5-alkoxy in positions 3, 4, 5 and 6 and R5 is hydrogen or hydroxyl in positions 2 and 3 relative to the carboxyl group, or where R6 is COO- or SO3- and R7 is hydrogen or methyl.

    DRAG REDUCING AGENTS
    8.
    发明专利
    DRAG REDUCING AGENTS 未知

    公开(公告)号：CA1152313A

    公开(公告)日：1983-08-23

    申请号：CA357506

    申请日：1980-08-01

    Applicant: HOECHST AG

    Inventor： WILSKI HANS ,  INTERTHAL WERNER ,  ENGELHARDT FRIEDRICH

    IPC: C08F220/56 ,  C09K3/00 ,  F15D1/00 ,  F17D1/16

    Abstract: Process for reducing the friction pressure drop of aqueous liquids and suspensions in turbulent or pulsating flow by adding from 1 to 1,000 ppm of linear random copolymers of the following formula I as drag reducing agents , in which X is a Na+, K+ or NH? cation and Y is hydrogen or a Na+, K+ or NH? cation, and in which a, b, c and d represent the proportional weight ratios of the comonomers in % and a is in the range of from 30 to 98, b from 0 to 20, c from 0 to 25 and d from 0 to 45, however, wherein the sum of the portions of b and c must be at least 2, the said copolymers being obtained in the manufacturing process in the form of aqueous and dimensionally stable jellies capable of being cut, while retaining their solubility in water.

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