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1. 发明申请

WO1997047850A1 MULTI-CYCLE CIRCULATING SUB 审中-公开
标题翻译：多循环循环
公开(公告)号：WO1997047850A1
公开(公告)日：1997-12-18
申请号：PCT/GB1997001581
申请日：1997-06-11
申请人： THE RED BARON (OIL TOOLS RENTAL) LIMITED , McGARIAN, Bruce , BARR, Lawrence, Robert
发明人： THE RED BARON (OIL TOOLS RENTAL) LIMITED
IPC分类号： E21B21/10
CPC分类号： E21B23/006 , E21B21/10
摘要： The invention relates to circulating subs for use in wellbores, particularly but not exclusively to circulating subs used during downhole drilling operations. The apparatus of the present invention is characterised by controlling means for controlling the movement of a sleeve between first (closed) and second (open) positions; the controlling means comprising: a control member (24) slidably mounted in a body (4) and moveable by fluid pressure in the body (4) in a first axial direction relative to the body (4); a spring (38) biasing the control member (24) in an opposite axial direction of the body (4); a pin (48) secured to one of the body (4) and the control member (24); and a control groove (32) in which a portion of the pin (48) is received formed in the other of the body (4) and the control member (24), the central groove (32) being shaped to limit axial displacement of the control member (24) in response to pressure variations in the body (4) such that only after a predetermined number of movements of the control member (24) to a first limit position is the control member (24) able to move to a second limit position to displace the sleeve (52) into the second position of the sleeve (52). The present apparatus thereby has the advantage over the prior art of being reliable and convenient to use, and compatible with the use of wireline or coil tubing tools. The apparatus may also be reset many times whilst remaining in a downhole position and is therefore less time consuming and less expensive to use than the prior art.
摘要翻译：本发明涉及用于井筒中的循环槽，特别地但不仅限于在井下钻井操作期间使用的循环槽。本发明的装置的特征在于：用于控制套筒在第一（闭合）和第二（打开）位置之间运动的控制装置; 所述控制装置包括：可滑动地安装在主体（4）中的控制构件（24），并且可相对于所述主体（4）沿第一轴向方向通过所述主体（4）中的流体压力移动; 弹簧（38），其在所述主体（4）的相反的轴向上偏置所述控制构件（24）; 固定到主体（4）和控制构件（24）中的一个的销（48）; 以及控制槽（32），其中所述销（48）的一部分被容纳在所述主体（4）和所述控制构件（24）中的另一个中，所述中心凹槽（32）成形为限制所述控制构件（24）响应于所述主体（4）中的压力变化，使得仅当所述控制构件（24）到所述第一极限位置的预定数量的运动之后，所述控制构件（24）能够移动到将所述套筒（52）移动到所述套筒（52）的第二位置的第二限位位置。因此，本发明的装置比现有技术具有可靠且方便使用的优点，并且与使用电缆或线圈管工具相兼容。该装置还可以多次复位，同时保持在井下位置，因此与现有技术相比，使用时间更短，成本更低。

2. 发明申请

WO1997021020A1 DOWN HOLE BYPASS VALVE 审中-公开
标题翻译：向下孔旁路阀
公开(公告)号：WO1997021020A1
公开(公告)日：1997-06-12
申请号：PCT/GB1996003027
申请日：1996-12-09
申请人： THE RED BARON (OIL TOOLS RENTAL) LIMITED , McGARIAN, Bruce , TULLOCH, Rory, McCrae , BARR, Lawrence, Robert
发明人： THE RED BARON (OIL TOOLS RENTAL) LIMITED
IPC分类号： E21B34/10
CPC分类号： E21B23/006 , E21B21/002 , E21B21/103 , E21B34/102
摘要： The invention relates to bypass valves for use in wellbores, particularly but not exclusively to bypass valves used during the setting of hydraulic anchor packers. The invention provides a bypass valve for selectively isolating the interior of a down-hole assembly from the exterior thereof, the bypass valve comprising constraining means (42, 44, 52) being adapted to permit movement of a piston (30) from a first position to a second position in response to a predetermined pressure differential between a bore (58) of the piston (30) and the exterior of a boy (4) but normally preventing movement of the piston (30) to a third position in which the bore (58) of the piston (30) is substantially isolated from the exterior of the body (4), and overriding means for overriding the constraining means (42, 44, 52) so as to permit movement of the piston (30) to the third position. The invention thereby provides a bypass valve which resists any tendency to close prematurely and which communicates any such tendancy to the surface.
摘要翻译：本发明涉及在井筒中使用的旁通阀，特别地但不仅限于在液压锚式包装机设置期间使用的旁通阀。本发明提供了一种用于选择性地将井下组件的内部与其外部隔离的旁通阀，旁通阀包括限制装置（42,44,52），其适于允许活塞（30）从第一位置响应于活塞（30）的孔（58）和男孩（4）的外部之间的预定压力差而通常防止活塞（30）运动到第三位置的第二位置，在第三位置，活塞（30）的活塞（58）与主体（4）的外部基本上隔离，并且用于覆盖约束装置（42,44,52）以便允许活塞（30）移动到第三名。因此，本发明提供一种旁通阀，其抵抗任何过早关闭的倾向，并将任何这种倾向传递到该表面。

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