Water-base clayey drilling fluids
    1.
    发明授权
    Water-base clayey drilling fluids 失效
    水基粘土钻井液

    公开(公告)号:US3629101A

    公开(公告)日:1971-12-21

    申请号:US3629101D

    申请日:1969-02-25

    Applicant: HOECHST AG

    CPC classification number: C09K8/24

    Abstract: Water-base, clayey drilling fluids are made suitable for the drilling of deep wells by addition thereto of a copolymer of vinyl-sulfonic acid and an N-vinyl-carboxylic acid amide or Nvinyl-pyrrolidone and, optionally, a small proportion of an anion-active vinyl compound that is polymerizable under the action of free radicals.

    POLYFUNCTIONAL DEMULSIFIERS FOR CRUDE OILS

    公开(公告)号:CA2104506C

    公开(公告)日:2004-11-23

    申请号:CA2104506

    申请日:1993-08-20

    Applicant: HOECHST AG

    Abstract: The invention relates to the use of oxyalkylated fatty amines and fatty amines of the formula (I) (see formula I) in which A is a radical of the formula (II) - (V) (see formula II) (see formula III) (see formula IV) (see formula V) in which R is C6-C22-alkyl, x is a number from 5 to 40, y is a number fro 5 to 70 and z is 0 - 70 % by weight of ethylene oxide, based on compounds of the formula (I) having x ethylene oxide units and y propylene oxide units, as demulsifiers, corrosion inhibitors and/or pour point depressants in crude oils. Radicals of the formula (I) without A are attached to the free valencies of the nitrogen atoms of the radicals of the formulae (II) to (V). The compounds of the formula (I) are prepared by reaction of amines of the formulae (II) to (V) with ethylene oxide and propylene oxide with addition of bases, such as alkali metal hydroxides.

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