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511 条记录 (耗时 0.014 秒)

    Method of offset explosive stimulation
    71.
    发明授权
    Method of offset explosive stimulation 失效
    爆炸性刺激的方法

    公开(公告)号：US3730274A

    公开(公告)日：1973-05-01

    申请号：US3730274D

    申请日：1971-12-30

    申请人： CITIES SERVICE OIL CO

    发明人： BROWN L

    IPC分类号： E21B43/263 ,  E21B43/26

    CPC分类号： E21B43/263

    摘要： A production borehole is drilled to total depth into and through a producing formation and casing is set to an intermediate depth. A bridge plug is set below the casing shoe into the open hole section above the producing formation and one or more offset wells are drilled into the producing formation beginning at the open hole section of the production borehole between the casing shoe and the bridge plug. The offset holes are loaded with explosive, plugged off, gravel packed and detonated in order to stimulate the well bore and surrounding formation.

    摘要翻译： 将生产钻孔钻入总深度进入并通过生产地层，并将套管设置为中间深度。 将桥式塞子设置在套管底部下方的生产地层上方的开孔部分中，并且在套管靴和桥塞之间的生产井眼的开孔部分处从生产地层钻出一个或多个偏移井。 偏置孔装满爆炸物，堵塞，砾石充填和引爆，以刺激井眼和周围的地层。

    Liquid explosive for well fracturing
    73.
    发明授权
    Liquid explosive for well fracturing 失效

    公开(公告)号：US3659652A

    公开(公告)日：1972-05-02

    申请号：US3659652D

    申请日：1971-01-27

    申请人： TALLEY FRAC CORP

    发明人： ROBERTS LEONARD N

    IPC分类号： C09K8/80 ,  E21B43/263 ,  E21B43/26

    CPC分类号： E21B43/263 ,  C09K8/80

    摘要： A cap insensitive liquid explosive is described which is particularly useful for fracturing a formation containing a network of narrow fissures adjacent a well bore in order to bring in a well or to increase its productivity, which includes a nitroparaffin compound, preferably nitromethane, capable of dissolving substantial amounts of high explosive compounds, and one or more of certain high explosive compounds dissolved therein. The high explosive compounds are of a kind and are present in an amount capable of rendering the liquid explosive sufficiently diameter insensitive to permit propagation of an explosion throughout a substantial portion of such network of narrow fissures when the liquid explosive is placed therein or in such other environment as it is to be used. Preferred high explosives are RDX, HMX and mixtures thereof. TNT, PETN or any other high explosive organic nitro compound may be included in an amount sufficient to render the liquid explosive less sensitive to detonation, such that it is not cap detonable, at the same time enhancing its explosive power and reliability. For certain applications, ammonium nitrate may be added to achieve desired explosive effects, as well as finely divided reactive metal to increase the brisance of the explosive. A gelling agent such as nitrocellulose is included to maintain the resulting uniform dispersion for long periods of time. A method of pressuretransferring a liquid explosive into the well bore and pressuring it back into the productive formation is described in which the explosive is injected through a tube into the well bore directly adjacent the formation to be fractured, the tube having first been cleared of air, by placing the liquid explosive in one or more tanks connected to the injection tube at the well surface and which are subjected to air pressure to force the explosive into the well. Further, a well fracturing method which is self cleaning, rendering unnecessary the usual cleaning step which follows fracturing, is disclosed in which the well bore is restricted above the level of the explosion and is closed above the restriction with sand or the like such that sufficient back pressure is maintained in the well for satisfactory fracturing, while the resultant gases are subsequently vented through the restriction, blowing the sand or other ballast as well as the rubble generated by the explosion out of the well bore.

    Well shock device
    74.
    发明授权
    Well shock device 失效
    良好的震动装置

    公开(公告)号：US3589442A

    公开(公告)日：1971-06-29

    申请号：US3589442D

    申请日：1969-06-27

    申请人： DRESSER IND

    发明人： KILGORE MARION D

    IPC分类号： E21B37/08 ,  E21B43/00 ,  E21B43/25 ,  E21B43/263

    CPC分类号： E21B37/08 ,  E21B43/25 ,  E21B43/263

    摘要： A shock device for unplugging perforations in a well and the like which comprises a chamber of low pressure relative to the pressure adjacent the perforations, the chamber being suddenly openable to the pressure adjacent the perforations with a consequent shock effect on the perforations.

    Apparatus and method of conducting string shot operations
    75.
    发明授权
    Apparatus and method of conducting string shot operations 失效
    设备和方法进行STRING拍摄操作

    公开(公告)号：US3572245A

    公开(公告)日：1971-03-23

    申请号：US3572245D

    申请日：1970-04-10

    申请人： GRAYSON BOBBY W

    发明人： GRAYSON BOBBY W

    IPC分类号： E21B37/08 ,  E21B43/1185 ,  E21B43/263 ,  F42D1/04 ,  F42B7/00

    CPC分类号： E21B43/263 ,  E21B37/08 ,  E21B43/1185 ,  F42D1/04

    摘要： STRING SHOT APPARATUS AND METHOD OF SERVICING PERFORATED WELL CASING USING ONE OR MORE EXPLOSIVE CORDS SUPPORTED ALONG A WIRE LINE AND EQUIPPED WITH DISCRIMINATOR MEANS FOR DETONATING THE CORDS INDEPENDENTLY OR IN GROUPS AT THE OPERATOR''S OPTION. THE WIRE LINE INCLUDES CENTRALIZERS DESIGNED TO BE QUICKLY ASSEMBLED TO AND DETACHED FROM THE LINE AS WELL AS MEANS FOR SECURING THE EXPLOSIVE CORD TO THE LINE IN A DESIRED DEGREE OF TANTNESS THE EXPLOSIVE CORD INCLUDES MEANS FOR ELIMINATING STRETCH AND PREFERABLY EMBODIED THEREIN TO SAFTGUARD AGAINST ITS ELONGATION BY FRICTIONAL OR OTHER FORCES ENCOUNTERED DURING THE SERVICING OPERATION. A READILY OPENED AND CLOSED BLOWOUT PROTECTOR IS SECURABLE ACROSS THE WELL HEAD TO SEAL THE WELL CLOSED ABOUT THE WIRE LINE TO AVOID A BLOWOUT IF THE SERVICING OPERATION RELEASES HIGH SUBSURFACE PRESSURES INTO THE WELL.