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公开(公告)号：EP1038086B1
公开(公告)日：2004-04-14
申请号：EP98959048.4
申请日：1998-12-11
申请人： ANDERGAUGE LIMITED
CPC分类号： E21B4/14 , E21B21/10 , F15B21/06 , F15B21/125 , Y10T137/86405
摘要： A percussion drill (10) has a tubular fluid transmitting body (14), with a drill bit (16) mounted on a drill bit support (20) itself mounted in body (14) via a spring (22) and splines (24). A mass (28) is spring mounted in the body (14) and is movable to impact on a face (26) of the support (20). Mounted to the mass (28) is a rotating valve (32) comprising two valve plates (34, 36). Each plate (34, 36) defines a slot (38, 40), such that rotation of one of the valve plates (36) relative to the other moves the slots (38, 40) into and out of alignment; the change in alignment of the slots (38, 40) alters the flow of drilling fluid through the valve (32), so altering the drilling fluid pressure force acting on the mass (28), so causing mass (28) to push against the spring (30), and impact on the drill bit support (20) providing a percussive action at the drill bit (16).
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公开(公告)号：EP0901562B1
公开(公告)日：2004-10-13
申请号：EP97923175.0
申请日：1997-05-16
申请人： ANDERGAUGE LIMITED
摘要： Downhole flow pulsing apparatus comprises a housing (14) for location in a drillstring, the housing (14) defining a throughbore to permit passage of fluid through the housing. A valve (27, 30) is located in the bore and defines a flow passage (29, 31). The valve includes a valve member (27) which is movable to vary the area of the passage (29, 31) to provide a varying fluid flow therethrough. A fluid actuated positive displacement motor (15, 16) is associated with the valve member (27). In a preferred embodiment, the apparatus is provided in combination with a drill bit (5) and a pressure responsive device, such as a shock-sub (3), which expands or retracts in response to the varying drilling fluid pressure created by the varying flow passage area. The expansion or retraction of the shock-sub (3) provides a percussive effect at the drill bit.
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公开(公告)号：EP1038086A1
公开(公告)日：2000-09-27
申请号：EP98959048.4
申请日：1998-12-11
申请人： ANDERGAUGE LIMITED
CPC分类号： E21B4/14 , E21B21/10 , F15B21/06 , F15B21/125 , Y10T137/86405
摘要： A percussion drill (10) has a tubular fluid transmitting body (14), with a drill bit (16) mounted on a drill bit support (20) itself mounted in body (14) via a spring (22) and splines (24). A mass (28) is spring mounted in the body (14) and is movable to impact on a face (26) of the support (20). Mounted to the mass (28) is a rotating valve (32) comprising two valve plates (34, 36). Each plate (34, 36) defines a slot (38, 40), such that rotation of one of the valve plates (36) relative to the other moves the slots (38, 40) into and out of alignment; the change in alignment of the slots (38, 40) alters the flow of drilling fluid through the valve (32), so altering the drilling fluid pressure force acting on the mass (28), so causing mass (28) to push against the spring (30), and impact on the drill bit support (20) providing a percussive action at the drill bit (16).
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公开(公告)号：EP0901562A1
公开(公告)日：1999-03-17
申请号：EP97923175.0
申请日：1997-05-16
申请人： ANDERGAUGE LIMITED
摘要： Downhole flow pulsing apparatus comprises a housing (14) for location in a drillstring, the housing (14) defining a throughbore to permit passage of fluid through the housing. A valve (27, 30) is located in the bore and defines a flow passage (29, 31). The valve includes a valve member (27) which is movable to vary the area of the passage (29, 31) to provide a varying fluid flow therethrough. A fluid actuated positive displacement motor (15, 16) is associated with the valve member (27). In a preferred embodiment, the apparatus is provided in combination with a drill bit (5) and a pressure responsive device, such as a shock-sub (3), which expands or retracts in response to the varying drilling fluid pressure created by the varying flow passage area. The expansion or retraction of the shock-sub (3) provides a percussive effect at the drill bit.
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