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公开(公告)号：US08978783B2
公开(公告)日：2015-03-17
申请号：US13116777
申请日：2011-05-26
CPC分类号： E21B10/322 , E21B10/60 , E21B17/1078
摘要： The expandable tools disclosed herein may be used as an underreamer to enlarge a borehole, or may be used to stabilize a drilling system in a previously underreamed borehole or in a borehole that is being underreamed while drilling progresses. At least one moveable arm, which translates between a collapsed and expanded position in response to a differential pressure between the axial flowbore and the wellbore, includes a borehole-engaging surface with cutting elements and at least one nozzle to direct a fluid across the borehole-engaging surface. Flow directing elements on the external surface of the tool may be used to decrease the flow area in an annulus between the tool and the wellbore and directs fluid flow in the annulus toward the borehole-engaging surface.
摘要翻译： 本文公开的可膨胀工具可以用作扩孔器的扩孔器，或者可以用于稳定钻井系统在预先钻进的钻孔中或在钻孔进行时正在被加热的钻孔中。 响应于轴流孔和井眼之间的压差，在折叠和膨胀位置之间平移的至少一个可移动臂包括具有切割元件的钻孔接合表面和至少一个喷嘴以将流体引导穿过钻孔 - 接合面。 可以使用工具外表面上的流动引导元件来减小工具和井筒之间的环形空间中的流动面积，并且将空气中的流体流引向钻孔接合表面。
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公开(公告)号：US20120073879A1
公开(公告)日：2012-03-29
申请号：US12893652
申请日：2010-09-29
IPC分类号： E21B10/26
CPC分类号： E21B10/46 , E21B10/32 , E21B10/322 , E21B10/43
摘要： A cutting structure for use with a reamer in enlarging a borehole in a subterranean formation includes a plurality of cutter blocks, radially extendable from a reamer body away from a central axis of the reamer body, each of the plurality of cutter blocks comprising at least one cutter blade thereon, wherein an angular spacing about the central axis of the reamer body between the at least one cutter blade on each of the plurality of cutter blocks is unequal.
摘要翻译： 用于扩孔钻孔的地下钻孔中的切割结构包括多个切割块，其可从铰刀主体远离扩孔器主体的中心轴线径向延伸，多个切割块中的每一个包括至少一个 其中在所述多个切割器块中的每一个上的所述至少一个切割刀片之间围绕所述铰刀主体的中心轴线的角度间隔是不相等的。
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公开(公告)号：US20120298423A1
公开(公告)日：2012-11-29
申请号：US13116777
申请日：2011-05-26
CPC分类号： E21B10/322 , E21B10/60 , E21B17/1078
摘要： Various embodiments of an expandable downhole tool for use in drilling of a wellbore are disclosed. The expandable tools disclosed herein may be used as an underreamer to enlarge a borehole, or may be used to stabilize a drilling system in a previously underreamed borehole or in a borehole that is being underreamed while drilling progresses. The various embodiments of the expandable tools disclosed herein have a higher hydraulic capacity than prior art underreamers. An increase in hydraulic energy delivered to the cutting structures may advantageously improve the rate of removal of cuttings from the cutting structures (improved cuttings evacuation), may decrease cutter element wear, and may prevent damage or premature failure. Improved cuttings evacuation may also provide for improved cutting action and increased penetration rates.
摘要翻译： 公开了用于钻井中的可扩展井下工具的各种实施例。 本文公开的可膨胀工具可以用作扩孔器的扩孔器，或者可以用于稳定钻井系统在预先钻进的钻孔中或在钻孔进行时正在被加热的钻孔中。 本文公开的可膨胀工具的各种实施例具有比现有技术的扩孔器更高的液压能力。 输送到切割结构的液压能量的增加可以有利地提高切割结构的切割速度（改进的切屑排出），可以减少切割器元件磨损，并且可以防止损坏或过早失效。 改进的切屑撤离也可以提供改进的切割作用和增加的渗透速率。
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公开(公告)号：US08550188B2
公开(公告)日：2013-10-08
申请号：US12893652
申请日：2010-09-29
IPC分类号： E21B10/00
CPC分类号： E21B10/46 , E21B10/32 , E21B10/322 , E21B10/43
摘要： A cutting structure for use with a reamer in enlarging a borehole in a subterranean formation includes a plurality of cutter blocks, radially extendable from a reamer body away from a central axis of the reamer body, each of the plurality of cutter blocks comprising at least one cutter blade thereon, wherein an angular spacing about the central axis of the reamer body between the at least one cutter blade on each of the plurality of cutter blocks is unequal.
摘要翻译： 用于扩孔钻孔的地下钻孔中的切割结构包括多个切割块，其可从铰刀主体远离扩孔器主体的中心轴线径向延伸，多个切割块中的每一个包括至少一个 其中在所述多个切割器块中的每一个上的所述至少一个切割刀片之间围绕所述铰刀主体的中心轴线的角度间隔是不相等的。
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