-
公开(公告)号：US5918858A
公开(公告)日：1999-07-06
申请号：US900369
申请日：1997-07-23
CPC分类号： F16K15/038 , E21B34/06 , F16K25/00 , E21B2034/005 , Y10T137/7902
摘要： The invention relates to a pair of matched surfaces usable in sealing a downhole subsurface safety valve. The continuous seat and the matching flapper profile feature a surface that is around its periphery transverse to the longitudinal axis of the seat and the flapper. The seating surface, if extended in a two-dimensional plane, defines an undulating shape which can be a sinusoidal shape in the preferred embodiment. The result is an improvement in the performance of the metal-to-metal contact between the seat and the flapper, coupled with a self-centering effect when the seating surface on the flapper, which is formed adjacent a shoulder, is presented in opposition to the seat. Additionally, the transverse undulating seat can have an embedded groove which accommodates a resilient seal, preferably PTFE or Teflon.RTM..
摘要翻译： 本发明涉及可用于密封井下地下安全阀的一对匹配表面。 连续的座椅和匹配的挡板轮廓具有围绕其横向于座椅和挡板的纵向轴线的周边的表面。 如果在二维平面中延伸，就座表面限定了在优选实施例中可以是正弦形状的起伏形状。 结果是，当座椅和挡板之间的金属对金属接触的性能改善时，与邻近肩部形成的挡板上的座面相对地呈现自对准效应 这个座位;专座;席位。 此外，横向起伏座可以具有嵌入的凹槽，其容纳弹性密封件，优选为PTFE或Teflon TM。
-
公开(公告)号：US5682921A
公开(公告)日：1997-11-04
申请号：US654377
申请日：1996-05-28
CPC分类号： F16K15/038 , E21B34/06 , F16K25/00 , E21B2034/005 , Y10T137/7902
摘要： The invention relates to a pair of matched surfaces usable in sealing a downhole subsurface safety valve. The continuous seat and the matching flapper profile feature a surface that is around its periphery transverse to the longitudinal axis of the seat and the flapper. The seating surface, if extended in a two-dimensional plane, defines an undulating shape which can be a sinusoidal shape in the preferred embodiment. The result is an improvement in the performance of the metal-to-metal contact between the seat and the flapper, coupled with a self-centering effect when the seating surface on the flapper, which is formed adjacent a shoulder, is presented in opposition to the seat. Additionally, the transverse undulating seat can have an embedded groove which accommodates a resilient seal, preferably PTFE or Teflon.RTM..
摘要翻译： 本发明涉及可用于密封井下地下安全阀的一对匹配表面。 连续的座椅和匹配的挡板轮廓具有围绕其横向于座椅和挡板的纵向轴线的周边的表面。 如果在二维平面中延伸，就座表面限定了在优选实施例中可以是正弦形状的起伏形状。 结果是，当座椅和挡板之间的金属对金属接触的性能改善时，与邻近肩部形成的挡板上的座面相对地呈现自对准效应 这个座位;专座;席位。 此外，横向起伏座可以具有嵌入的凹槽，其容纳弹性密封件，优选为PTFE或Teflon TM。
-
公开(公告)号：US06269874B1
公开(公告)日：2001-08-07
申请号：US09302102
申请日：1999-04-29
IPC分类号： E21B3406
CPC分类号： E21B34/066 , E21B2034/005
摘要： An electro-hydraulic surface controlled subsurface safety valve is controllable entirely electrically. The actuator operates on an electrically actuated pressure pump and a supply of hydraulic fluid reservoired in the tool proximate to the safety valve. A dump valve is normally open so that if power fails, pressure is released and the safety valve closes.
摘要翻译： 电液表面控制的地下安全阀完全可电控制。 致动器在电致动的压力泵上操作，并且在靠近安全阀的工具中供应保留的液压流体。 排放阀通常打开，以防止电力故障时释放压力，安全阀关闭。
-
公开(公告)号：US06253843B1
公开(公告)日：2001-07-03
申请号：US08987686
申请日：1997-12-09
申请人： Michael S. Rawson , Doug Trott
发明人： Michael S. Rawson , Doug Trott
IPC分类号： E21B3400
CPC分类号： E21B34/066 , E21B2034/005
摘要： An electric safety valve actuator for a surface controlled subsurface safety valve. The actuator includes a motor drive and driver selectively coupled with a drive yoke connected to an otherwise conventional flow tube of a downhole safety valve.
摘要翻译： 一种用于表面控制地下安全阀的电动安全阀执行器。 致动器包括马达驱动器和驱动器，其选择性地与连接到井下安全阀的常规流管的驱动轭连接。
-
公开(公告)号：US5984260A
公开(公告)日：1999-11-16
申请号：US734783
申请日：1996-10-15
CPC分类号： F16K31/047 , F16H2025/2068 , Y10T74/18592
摘要： A valve actuator preferably driven by an electric motor is disclosed. The valve actuator is useful with surface safety valves and uses power input from an electric motor to position the valve in its normal position. A mechanism is provided to allow the valve to shift positions to a failsafe position upon failure of electrical power to the motor connected to the actuator. A screw drive is provided with the motor, with a latch mechanism holding a nut against rotation. The nut can advance longitudinally upon rotation of the drive to move a valve stem. Upon failure of electrical power, the latch mechanism releases the nut from a coupling in the actuator which is connected to the valve stem, and the main return springs in the actuator allow the nut to rotate with respect to the screw drive so that the valve can assume its failed position. Normal applications allow the valve to fail closed; however, the valve can be configured so that failure results in opening of the valve if the application requires it.
摘要翻译： 公开了一种优选由电动机驱动的阀致动器。 阀门执行器可用于表面安全阀，并使用电动机的动力输入将阀定位在正常位置。 提供了一种机构，以允许阀在连接到致动器的马达的电力失效时将位置移动到故障安全位置。 螺丝传动装置设有电动机，具有保持螺母以防旋转的闩锁机构。 当驱动器旋转时，螺母可以纵向前进，以移动阀杆。 在电力故障时，闩锁机构将螺母从连接到阀杆的致动器中的联接器释放，并且致动器中的主复位弹簧允许螺母相对于螺杆驱动器旋转，使得阀可以 承担失败的位置。 正常应用允许阀门关闭; 然而，阀可以被配置为使得如果应用需要，故障导致阀的打开。
-
-
-
-
搜索结果
5 条记录 (耗时 0.011 秒)
