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403 条记录 (耗时 0.015 秒)

    Stimulation of recovery from underground deposits
    92.
    发明授权
    Stimulation of recovery from underground deposits 失效
    刺激地下沉积物的恢复

    公开(公告)号：US3593793A

    公开(公告)日：1971-07-20

    申请号：US3593793D

    申请日：1969-02-03

    申请人： CITIES SERVICE OIL CO

    发明人： KELSEAUX RAY M

    IPC分类号： E21B43/263 ,  E21B43/267 ,  E21B43/26

    CPC分类号： E21B43/267 ,  E21B43/263

    摘要： Chemically stable liquid reactants capable of forming an explosive reaction mixture are injected into a fluid or mineral bearing formation, which may first be hydraulically fractured. An inert spacing medium is injected intermediate to the injection of the reactants so that the explosive mixture is formed at some desired radial distance from the wellbore. The reactants may be such that the explosive mixture autodetonates with the passage of time or may be detonated by shock, as by the detonation of a conventional detonating device. The reactants may also be injected in cycles, each cycle comprising the reactants separated by a slug of inert spacing medium. The amount of spacer may be varied during the treating operation, as by decreasing the amount of spacing medium during the operation, so that the explosive reaction mixtures are formed in concentric regions of the formation surrounding the wellbore. The first reactant may be used as a hydraulic fracturing fluid, and contain conventional and/or shock-sensitive explosive propping agents. Upon detonation of the explosive reaction mixtures, the formation is fractured in a radial manner with the resulting fractures propagated both outward into the formation and inward toward the wellbore so as to enhance the subsequent recovery of minerals or fluids from the formation.

    Process for separation of meta-para-xylene isomers from their mixture
    93.
    发明授权
    Process for separation of meta-para-xylene isomers from their mixture 失效
    从其混合物中分离出甲基 - 二甲苯异构体的方法

    公开(公告)号：US3574778A

    公开(公告)日：1971-04-13

    申请号：US3574778D

    申请日：1968-11-26

    申请人： CITIES SERVICE OIL CO

    发明人： RAI CHARANJIT ,  ELMOGAZI MOHAMED M

    IPC分类号： C07C7/14

    CPC分类号： C07C7/14 ,  C07C15/08

    摘要： IN THE SEPARATION OF PARA-XYLENE FROM MIXTURES CONSISTING PREDOMINANTLY OF META- AND PARA-XYLENE ISOMERS BY FRACTIONAL CRYSTALLIZATION, SMALL AMOUNTS OF GASEOUS EUTECTIC INHIBITORS ARE DISSOLVED IN THE XYLENE MIXTURE TO LOWER TO EUTECTIC POINT OF THE MIXTURE AND IMPROVE RECOVERY OF PARA-XYLENE THEREFROM, THE AMOUNT OF GAS DISSOLVED IN THE XYLENE MIXTURE IS BETWEEN ABOUT 0.01 AND ABOUT 4.0 MOLE PRECENT AND IS PREFERABLY IN THE RANGE BETWEEN ABOUT 0.3 AND ABOUT 1.0 MOLE PRECENT.