DEVICE AND METHOD FOR IMPROVING LIQUID REMOVAL FROM GAS, CONDENSATE & OIL WELLS WHEN USING A MULTI-CHANNEL SYSTEM

    公开(公告)号:CA2719445A1

    公开(公告)日:2012-01-01

    申请号:CA2719445

    申请日:2010-10-19

    Abstract: The present invention is used in conjunction with a multi-channel system of a production string for deployment in gas, condensate or oil wells. An end-piece is placed at the entrance to such multi--channel system. It includes a semi-enclosed space helping to increase the proportion of gas phase entering the system at its bottom entrance. Increased proportion of gas allows lifting liquids and/or solids from the wellbore with greater efficiency. Examples of using the invention include wellbore water removal for gas wells with liquid loading problems, for solution gas drive or gas cap driven oils wells during their initial "natural flowing phase", or during gas re-injection or gas-lift recovery operations for oil wells. It can also be used for gas-lifting water in water wells.

    DEVICE AND METHOD FOR IMPROVING LIQUID REMOVAL FROM GAS, CONDENSATE & OIL WELLS WHEN USING A MULTI-CHANNEL SYSTEM

    公开(公告)号:CA2719445C

    公开(公告)日:2013-10-01

    申请号:CA2719445

    申请日:2010-10-19

    Abstract: The present invention is used in conjunction with a multi-channel system of a production string for deployment in gas, condensate or oil wells. An end-piece is placed at the entrance to such multi--channel system. It includes a semi-enclosed space helping to increase the proportion of gas phase entering the system at its bottom entrance. Increased proportion of gas allows lifting liquids and/or solids from the wellbore with greater efficiency. Examples of using the invention include wellbore water removal for gas wells with liquid loading problems, for solution gas drive or gas cap driven oils wells during their initial "natural flowing phase", or during gas re- injection or gas-lift recovery operations for oil wells. It can also be used for gas-lifting water in water wells.

    Gas well dewatering method and device

    公开(公告)号:AU4076399A

    公开(公告)日:2000-05-15

    申请号:AU4076399

    申请日:1999-05-12

    Abstract: A method and device for removal of production inhibiting liquid from a gas well, wherein a tubing string is placed inside the well to form a fluid communication path from the liquid accumulation zone near the bottom of the well to the ground surface. The diameter of the tubing string is sufficiently small (preferably between +E,fra 1/16+EE and +E,fra 1/2+EE inch) so as to define a high liquid-to-gas ratio two-phase flow, preferably capillary bubble flow along the tubing string in order to maximize the liquid head and minimize the gas loss in this tubing string, and to reduce or eliminate the additional restriction along the main gas production tubing generally associated with the presence of such tubing string. In some embodiments, the tubing string comprises a plurality of individual tubing channels for increased rate of liquid removal, each channel being of sufficiently small size so as to define a capillary bubble flow.

    Method and device for reducing axial thrust in rotary machines and a centrifugalpump using same

    公开(公告)号:AU4357100A

    公开(公告)日:2000-11-17

    申请号:AU4357100

    申请日:2000-04-18

    Inventor: GANELIN BORIS

    Abstract: A method and device for reducing or eliminating axial thrust in a rotary machine such as a centrifugal pump or compressor by altering the fluid pressure in a cavity formed between a rotor and a housing. The device contains a disk placed along the rotor for subdividing the fluid in the cavity in such a way that all annular gap leakage flow is channeled and pumped through the space between that disk and the rotor from the center of the pump towards the periphery. As a result, the pressure in the cavity is altered to reduce and control the axial thrust on the rotor which becomes independent of the wear state of the shaft seals. In another embodiment, the step of flow subdividing is achieved by providing a set of braking vanes along the periphery of the cavity for reducing the rotational speed of the fluid coming from the cavity as well as from the annular gap and a stationary disk placed along the interior wall of the housing for directing the radial flow of that fluid towards the center of the pump.

    METHOD AND DEVICE FOR REDUCING AXIAL THRUST AND RADIAL OSCILLATIONS AND ROTARY MACHINES USING SAME
    10.
    发明申请
    METHOD AND DEVICE FOR REDUCING AXIAL THRUST AND RADIAL OSCILLATIONS AND ROTARY MACHINES USING SAME 审中-公开
    用于减少轴向振动和径向振荡的旋转机械的旋转机构

    公开(公告)号:WO2008094801A3

    公开(公告)日:2008-10-09

    申请号:PCT/US2008051806

    申请日:2008-01-23

    Abstract: A method and apparatus to reduce the axial thrust in rotary machines such as compressors, centrifugal pumps, turbines, etc. includes providing additional peripheral restrictive means (7) attached at the peripheral portion of the disk forming the subdividing means (4) on the side facing the rotating rotor (2). An additional ring element at the periphery of the subdividing means forms additional radial (11) and axial restrictive means (15). Such peripheral restrictive means (7, 11 and 15) function as sealing dams, which combined with the outward flow induced by the rotating impeller, form self-pressurizing hydrodynamic bearings in the axial and radial planes, improving rotordynamic stability. Additionally, a stationary ring element in the center of the cavity forms a seal with the rotor, reducing leakage to suction.

    Abstract translation: 一种用于减小诸如压缩机,离心泵,涡轮机等旋转机械中的轴向推力的方法和装置包括提供附加在盘的周边部分处的附加的外围限制装置(7),所述外围限制装置形成在侧面上的细分装置(4) 面向旋转转子(2)。 在分割装置的周边处的另外的环形元件形成附加的径向(11)和轴向限制装置(15)。 这种外围限制装置(7,11和15)用作密封坝,其结合由旋转叶轮引起的向外流动,在轴向和径向平面中形成自加压流体动力轴承,从而提高转动动力学稳定性。 另外,空腔中心的固定环元件与转子形成密封,减少了泄漏到吸力。

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