Method for treating radioactive waste
    41.
    发明授权
    Method for treating radioactive waste 失效
    放射性废物处理方法

    公开(公告)号:US5835866A

    公开(公告)日:1998-11-10

    申请号:US588906

    申请日:1996-01-19

    IPC分类号: G21F9/30 G21F9/00

    CPC分类号: G21F9/30

    摘要: Ion exchange resins contaminated with a radioactive component are treated by exposing the contaminated ion exchange resins to a bound radio frequency electric field for uniformly heating them to drive off water. The dried ion exchange resins are then uniformly heated by a transversely uniform bound radio frequency electric field to a second higher temperature which chemically inactivates the functional groups of the ion exchange resins to destroy their hydrophilic property and convert them to a stabilized product for long-term safe storage.

    摘要翻译: 被放射性成分污染的离子交换树脂通过将污染的离子交换树脂暴露于结合的射频电场来进行处理,以均匀加热它们以排出水。 然后将干燥的离子交换树脂通过横向均匀结合的射频电场均匀加热到第二较高温度,该第二较高温度化学灭活离子交换树脂的官能团以破坏它们的亲水性质并将其转化成稳定的产品长期 安全储存

    Iterated electrodes for oil wells
    42.
    发明授权
    Iterated electrodes for oil wells 失效
    石油井的电极

    公开(公告)号:US5784530A

    公开(公告)日:1998-07-21

    申请号:US600671

    申请日:1996-02-13

    申请人: Jack E. Bridges

    发明人: Jack E. Bridges

    CPC分类号: E21B43/2401 E21B36/04

    摘要: An electrical heating system for enhancing production from an oil well, particularly an oil well of the kind commonly known as a horizontal well, the well including an initial well bore extending downwardly from the surface of the earth through one or more overburden formations and communicating with a producing well bore extending from the initial well bore into at least one oil producing formation. The producing well bore may or may not be truly horizontal The heating system includes an electrode array comprising a plurality of at least three tubular, electrically conductive heating electrodes extending through the producing well bore. Each electrode has a given length, usually two to three meters, and a smaller diameter D. The sum of the electrode lengths is substantially less than the length of the producing well bore. The electrodes are spaced from each other by isolation sections; the length of an isolation section is much greater than the electrode diameter D. The heating system further includes an electrical power delivery apparatus for energizing the electrodes with A.C. power, but with a phase displacement of at least 90.degree..

    摘要翻译: 一种用于从油井,特别是通常称为水平井的油井提高生产的电加热系统,井包括从地球表面向下延伸通过一个或多个上覆岩层的初始井眼,并与 从初始井眼延伸到至少一个产油层的生产井眼。 生产井眼可能或可能不是真正的水平。加热系统包括电极阵列,其包括延伸穿过生产井眼的多个至少三个管状的导电加热电极。 每个电极具有给定长度,通常为2至3米,直径D较小。电极长度的总和远小于生产井眼的长度。 电极通过隔离部彼此间隔开; 隔离部分的长度比电极直径D大得多。加热系统还包括一个电力输送装置,用于用交流电来激励电极,但相移至少为90度。

    Apparatus for electrode heating of earth for recovery of subsurface
volatiles and semi-volatiles
    44.
    发明授权
    Apparatus for electrode heating of earth for recovery of subsurface volatiles and semi-volatiles 失效
    用于电极加热地球以回收地下挥发物和半挥发物的装置

    公开(公告)号:US5621845A

    公开(公告)日:1997-04-15

    申请号:US444228

    申请日:1995-05-18

    摘要: Improved methods and apparatus are disclosed for confining ohmic heating currents to a subsurface formation in the use of in situ ohmic heating for recovery of volatile and semi-volatile materials, such as hazardous waste, hydrocarbon-like materials, and valuable minerals having thermally responsive properties. Spacing between emplaced electrodes and the number of electrodes employed are controlled to cause coupling between electrodes for more uniform and higher temperature heating. Electrode designs are disclosed which suppress spurious earth currents which would heat other formations not of interest. Suppression of electrode end currents is accomplished by the use of distinct rings of insulation, control of the applied potential along the electrode, and injection or withdrawal of fluids at distinct locations along the electrode.

    摘要翻译: 公开了改进的方法和装置,用于将欧姆加热电流限制在地下地层中,使用原位欧姆加热来回收挥发性和半挥发性材料,例如危险废物,烃类材料和具有热响应特性的有价值矿物 。 控制电极之间的间距和使用的电极数量,以使电极之间的耦合更均匀和更高温度的加热。 公开了电极设计,其抑制杂散的地电流,这将加热不感兴趣的其它地层。 电极端电流的抑制是通过使用不同的隔离环,沿电极的施加电位的控制,以及沿着电极的不同位置的流体的注入或取出而实现的。

    Power sources for downhole electrical heating
    47.
    发明授权
    Power sources for downhole electrical heating 失效
    井下电加热电源

    公开(公告)号:US5099918A

    公开(公告)日:1992-03-31

    申请号:US646514

    申请日:1991-01-25

    摘要: Electrical power sources and systems for heating in or adjacent to an oil well or other mineral well, or for heating other earth media, each comprising an A.C. heating generator that generates an A.C. heating current at a selected heating frequency substantially different from the conventional 50/60 Hz frequency used by power companies; the heating generator may comprise an A.C. to D.C. converter for developing an intermediate D.C. output of predetermined amplitude from a conventional 50/60 Hz A.C. input, and a solid state switching circuit for repetitively sampling the D.C. output of the converter at the selected heating frequency, usually in a range of 0.01 Hz (or even lower) up to about 35 Hz. A heating rate control varies the energy content and the frequency of the A.C. output to suit well requirements. Each power source or system includes output connections for connecting the output of the heating generator to a normally inaccessible main heating electrode, usually located downhole in a well, and to a return electrode; most have the capability of including a very small controllable D.C. component in the output.

    摘要翻译: 用于在油井或其他矿井中或邻近油井或其他矿井加热或用于加热其它地球介质的电源和系统,每个包括交流加热发电机,其以与传统的50 / 电力公司使用的60 Hz频率; 加热发电机可以包括AC-DC转换器,用于从常规的50/60Hz AC输入开发预定幅度的中间DC输出,以及固态切换电路,用于以选定的加热频率重复地对转换器的DC输出进行采样, 通常在0.01Hz(甚至更低)至35Hz的范围内。 加热速率控制可以改变交流输出的能量含量和频率,以适应良好的要求。 每个电源或系统包括用于将发电机的输出连接到通常位于井下的通常不可接近的主加热电极和返回电极的输出连接; 大多数都具有在输出中包含非常小的可控直流分量的能力。

    Robust electrical heating systems for mineral wells
    48.
    发明授权
    Robust electrical heating systems for mineral wells 失效
    用于矿井的坚固的电加热系统

    公开(公告)号:US5070533A

    公开(公告)日:1991-12-03

    申请号:US610080

    申请日:1990-11-07

    IPC分类号: E21B36/04 H05B3/00 H05B3/03

    摘要: Electrical heating system for mineral wells, particularly oil wells, in which the reservoir or "pay zone" is heat stimulated or some well components (e.g., the tubing) are heated, or both, by electrical power supplied to a multi-perforate electrode have the operating efficiency enhanced by effectively terminating the heating electrode, at both its top and bottom, at a distance inwardly of the pay zone equal to at least three times the diameter of the well casing. In some systems the electrical power connection to the main heating electrode is made through a section of the production tubing of the well, with an electrical contactor interconnecting the tubing and the electrode in the level of the pay zone; these systems also provide electrical isolation, within critical height limits, for the production tubing and the pump rod. Delivery of electrical power downhole of the well may be accomplished through an electrical cable, which may or may not be appropriately armored. Specific electrode construction combine conductive and insulating materials to counteract galvanic corrosion while maintaining mechanical strength.

    Control for guiding a boring tool
    50.
    发明授权
    Control for guiding a boring tool 失效
    引导钻孔工具的控制

    公开(公告)号:US4646277A

    公开(公告)日:1987-02-24

    申请号:US722807

    申请日:1985-04-12

    摘要: A control system guides a boring tool in a borehole. The tool has a longitudinal tool axis and includes a driver for advancing the tool axially through the earth and steering mechanism for directing the motion of the tool relative to the tool axis in response to control signals. The control system includes an axial electromagnetic source for generating an axial alternating magnetic field directed along an axial source axis. A sensing assembly remote from the source means includes first and second pickup coils for sensing the alternating magnetic field. Each of the first and second pickup coils has a respective coil axis and is rigidly mounted in respect to the other with their respective axes at a substantial angle with respect to each other, defining a sensing assembly axis substantially normal to both coil axes. Each coil generates a respective null electrical signal when the lines of magnetic flux at the respective coil are normal to the respective coil axis. Either the source of the sensing assembly is rigidly mounted on the tool, preferably the source. The outputs of the sensing coils are used to determine the direction of lines of magnetic flux at the sensing assembly, and indicate the attitude of the source relative to the sensing assembly. This permits guiding of the tool by control signals sent to the tool.

    摘要翻译: 控制系统将钻孔工具引导到钻孔中。 该工具具有纵向工具轴线,并且包括用于使工具轴向推进穿过地面的驱动器和用于响应于控制信号引导工具相对于工具轴线的运动的转向机构。 控制系统包括用于产生沿着轴向源轴线定向的轴向交变磁场的轴向电磁源。 远离源装置的感测组件包括用于感测交变磁场的第一和第二拾取线圈。 第一和第二拾取线圈中的每一个具有相应的线圈轴线,并且相对于彼此以相对的轴线相对于彼此以相当的角度刚性地安装,限定了基本上垂直于两个线圈轴线的感测组件轴线。 当各个线圈的磁通线垂直于相应的线圈轴线时,每个线圈产生相应的零电信号。 传感组件的源头刚性地安装在工具上,优选地安装在工具上。 感测线圈的输出用于确定感测组件处的磁通线的方向,并且指示源相对于感测组件的姿态。 这允许通过发送到工具的控制信号来引导工具。