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1. 发明申请

US20090132218A1 DISCRETE ELEMENT MODELING OF ROCK DESTRUCTION UNDER HIGH PRESSURE CONDITIONS 有权
标题翻译：高压条件下岩石破坏的离散元素建模
公开(公告)号：US20090132218A1
公开(公告)日：2009-05-21
申请号：US11946973
申请日：2007-11-29
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： G06G7/48
CPC分类号： E21B10/00 , E21B10/08 , E21B10/55 , E21B49/00
摘要： Discrete Element Modeling (DEM) of rock subject to high confining pressures, such as in a subterranean drilling environment, may be used to predict performance of cutting structures used in drill bits and other drilling tools, as well as of the tools themselves. DEM may also be used to create “virtual” rock exhibiting specific drillability characteristics with or without specific reference to any actual rock, for purposes of assessing cutting efficiency of various cutting structure configurations and orientations, as well as of drilling tools incorporating same.
摘要翻译：受到高围压的岩石的离散元素建模（DEM），例如在地下钻井环境中，可用于预测钻头和其他钻孔工具以及工具本身中使用的切割结构的性能。为了评估各种切割结构构造和取向的切割效率以及结合其的钻孔工具的目的，也可以使用DEM来创建具有或不具体参考任何实际岩石的特定可钻性特征的“虚拟”岩石。

2. 发明授权

US07011170B2 Increased projection for compacts of a rolling cone drill bit 有权
标题翻译：增加滚动锥钻头的压实突起
公开(公告)号：US07011170B2
公开(公告)日：2006-03-14
申请号：US10690943
申请日：2003-10-22
申请人： Leroy W. Ledgerwood, III , Timothy K. Marvel
发明人： Leroy W. Ledgerwood, III , Timothy K. Marvel
IPC分类号： E21B10/16 , E21B10/00
CPC分类号： E21B10/08 , E21B10/16
摘要： An earth boring bit has rolling cones rotatably mounted to the bit legs. Each cone has conical bands extending around the exterior. Holes are formed in each of the bands. Compacts are press-fitted into the holes, each having a cutting tip that projects from the conical band. Flats are formed in the conical bands, each flat extending between adjacent compacts.
摘要翻译：地镗头具有可旋转地安装在钻头腿上的滚动锥。每个锥体具有围绕外部延伸的锥形带。在每个带中形成孔。紧凑件压入孔中，每个具有从锥形带突出的切割尖端。平板形成在圆锥形带中，每个平面在相邻压块之间延伸。

3. 发明申请

US20130245950A1 APPARATUS AND METHODS FOR DETERMINING WHIRL OF A ROTATING TOOL 有权
标题翻译：用于确定旋转工具的几何的装置和方法
公开(公告)号：US20130245950A1
公开(公告)日：2013-09-19
申请号：US13422860
申请日：2012-03-16
申请人： Jayesh R. Jain , Olivier J.-M. Hoffmann , Leroy W. Ledgerwood, III
发明人： Jayesh R. Jain , Olivier J.-M. Hoffmann , Leroy W. Ledgerwood, III
IPC分类号： G06F19/00 , E21B44/00
CPC分类号： E21B10/00 , E21B47/00
摘要： In one aspect, a method of determining the presence of whirl for a rotating tool is disclosed that in one embodiment includes obtaining measurements (ax) of a parameter relating to the whirl of the tool along a first axis and measurements (ay) of the parameter along a second axis of the tool, determining a first whirl in a time domain for the tool using ax and ay measurements, determining a second whirl rate for the tool in a frequency domain from ax and ay measurements and determining the presence of the whirl from the first whirl rate and second whirl rate. The method further quantifies the whirl of the tool from the first and second whirl rates.
摘要翻译：在一个方面，公开了一种确定旋转工具的旋转的存在的方法，在一个实施例中包括获得与第一轴的工具的旋转有关的参数的测量（ax）和参数的测量值（ay）沿着所述工具的第二轴，使用ax和ay测量确定所述工具的时域中的第一旋转，从ax和ay测量确定所述工具在频域中的第二旋转速率，并且确定所述旋转的存在第一个旋转速率和第二个旋转速率。该方法从第一和第二旋转速率进一步量化了工具的旋转。

4. 发明授权

US09410377B2 Apparatus and methods for determining whirl of a rotating tool 有权
标题翻译：用于确定旋转工具的旋转的装置和方法
公开(公告)号：US09410377B2
公开(公告)日：2016-08-09
申请号：US13422860
申请日：2012-03-16
申请人： Jayesh R. Jain , Olivier J.-M. Hoffmann , Leroy W. Ledgerwood, III
发明人： Jayesh R. Jain , Olivier J.-M. Hoffmann , Leroy W. Ledgerwood, III
IPC分类号： E21B10/00 , E21B47/00
CPC分类号： E21B10/00 , E21B47/00
摘要： In one aspect, a method of determining the presence of whirl for a rotating tool is disclosed that in one embodiment includes obtaining measurements (ax) of a parameter relating to the whirl of the tool along a first axis and measurements (ay) of the parameter along a second axis of the tool, determining a first whirl in a time domain for the tool using ax and ay measurements, determining a second whirl rate for the tool in a frequency domain from ax and ay measurements and determining the presence of the whirl from the first whirl rate and second whirl rate. The method further quantifies the whirl of the tool from the first and second whirl rates.
摘要翻译：在一个方面，公开了一种确定旋转工具的旋转的存在的方法，在一个实施例中包括获得与第一轴的工具的旋转有关的参数的测量（ax）和参数的测量值（ay）沿着所述工具的第二轴，使用ax和ay测量确定所述工具的时域中的第一旋转，从ax和ay测量确定所述工具在频域中的第二旋转速率，并且确定所述旋转的存在第一个旋转速率和第二个旋转速率。该方法从第一和第二旋转速率进一步量化了工具的旋转。

5. 发明授权

US4344658A Earth boring drill bit with snap ring cutter retention 失效
标题翻译：钻孔钻头，带卡环切割机保持
公开(公告)号：US4344658A
公开(公告)日：1982-08-17
申请号：US174483
申请日：1980-08-01
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： E21B10/20 , E21B10/22 , F16B21/18 , F16C43/02 , F16C17/12
CPC分类号： F16B21/183 , E21B10/20 , E21B10/22 , F16C43/02 , F16C2352/00 , Y10S384/903
摘要： Disclosed herein is an earth boring bit of otherwise conventional construction except for the bearing and cutter retention. A snap ring is used to retain the cutter, the grooves that receive the ring and the ring construction being such that the ring is forced into the retainer groove when the cone is thrust inward. The ring cannot therefore accidentally return to its assembly position to permit cutter loss. This enables the use of exclusively frictional bearings and retainer means of exceptional strength and reliability.
摘要翻译：本文公开了除了轴承和刀具保持之外的另外常规结构的钻孔钻头。使用卡环来保持切割器，接收环的凹槽和环结构使得当锥体向内推动时，环被迫进入保持器槽。因此，环不能意外地返回到组装位置以允许刀具损失。这使得专门使用摩擦轴承和保持器装置具有出色的强度和可靠性。

6. 发明授权

US08150667B2 Discrete element modeling of rock destruction under high pressure conditions 有权
标题翻译：高压条件下岩石破坏的离散元素建模
公开(公告)号：US08150667B2
公开(公告)日：2012-04-03
申请号：US11946973
申请日：2007-11-29
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： G06G7/48
CPC分类号： E21B10/00 , E21B10/08 , E21B10/55 , E21B49/00
摘要： Discrete Element Modeling (DEM) of rock subject to high confining pressures, such as in a subterranean drilling environment, may be used to predict performance of cutting structures used in drill bits and other drilling tools, as well as of the tools themselves. DEM may also be used to create “virtual” rock exhibiting specific drillability characteristics with or without specific reference to any actual rock, for purposes of assessing cutting efficiency of various cutting structure configurations and orientations, as well as of drilling tools incorporating same.
摘要翻译：受到高围压的岩石的离散元素建模（DEM），例如在地下钻井环境中，可用于预测钻头和其他钻孔工具以及工具本身中使用的切割结构的性能。为了评估各种切割结构构造和取向的切割效率以及结合其的钻孔工具的目的，也可以使用DEM来创建具有或不具体参考任何实际岩石的特定可钻性特征的“虚拟”岩石。

7. 发明授权

US08025113B2 Detritus flow management features for drag bit cutters and bits so equipped 有权
标题翻译： Detritus流量管理功能，用于拖刀钻头和钻头
公开(公告)号：US08025113B2
公开(公告)日：2011-09-27
申请号：US11606611
申请日：2006-11-29
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： E21B10/46
CPC分类号： E21B10/573 , E21B10/54
摘要： Rock detritus created by a drag bit cutter shearing subterranean formation material may flow under a cutter and attach itself to a side surface of a cutter barrel by differential pressure-induced sticking, and dilate. This attached material, confined by hydrostatic pressure, can create and strengthen a barrier between the cutter and virgin rock being cut. The detritus barrier absorbs bit weight and reduces cutter efficiency by impairing contact of the cutter with the virgin rock formation. Increasing friction between the rock detritus and the side surface of the cutter barrel inhibits detritus flow, reduces build up, and allows hydrostatic pressure to contribute to, rather than inhibit, the cutting process. Similar beneficial results may be obtained when hydrostatic pressure drilling fluid is permitted to communicate through holes in the side surface of the cutter, or through an otherwise permeable side surface alleviating detritus sticking due to differential pressure effects.
摘要翻译：由刮刀剪切剪切地层形成材料产生的岩石碎屑可能在切割器下方流动，并通过差压引起的粘附将其自身附着到切割机筒的侧表面并膨胀。这种被静水压力限制的附着材料可以产生并加强切割器和被切割的原始岩石之间的屏障。碎屑屏障通过削弱切割器与原始岩层的接触来吸收钻头重量并降低刀具效率。岩石碎屑与切割筒的侧面之间的增加的摩擦力可抑制碎屑流动，减少堆积，并允许静水压力有助于而不是抑制切割过程。当允许静水压力钻井液通过切割器的侧表面中的孔或通过另外可渗透的侧表面减轻由于压差效应引起的碎屑粘附时，可以获得类似的有益效果。

8. 发明授权

US07497256B2 Method and apparatus for collecting fluid samples downhole 有权
标题翻译：井下采集液体样品的方法和装置
公开(公告)号：US07497256B2
公开(公告)日：2009-03-03
申请号：US11450774
申请日：2006-06-09
申请人： Rocco DiFoggio , Leroy W. Ledgerwood, III
发明人： Rocco DiFoggio , Leroy W. Ledgerwood, III
IPC分类号： E21B49/06 , E21B49/10
CPC分类号： E21B49/08 , E21B49/10
摘要： In one embodiment an apparatus is disclosed that includes a tool in a wellbore. A probe is extendable from the tool to contact a wall of a formation surrounding the wellbore. A tube substantially surrounds the probe wherein the tube is extendable into the formation surrounding the wellbore. In another embodiment a method for reducing contamination of a sample of a formation fluid is disclosed that includes extending a probe to contact a wall of a formation. A barrier tube that substantially surrounds the probe is extended into the formation thereby restricting a flow of a contaminated reservoir fluid that would otherwise come from near-wellbore regions above and below the probe from going toward the probe.
摘要翻译：在一个实施例中，公开了一种在井眼中包括工具的装置。探头可从工具延伸以接触围绕井眼的地层的壁。管基本上围绕探针，其中管可延伸到围绕井眼的地层中。在另一个实施方案中，公开了一种减少地层流体样品污染的方法，其包括使探针延伸以接触地层的壁。基本上围绕探针的阻挡管延伸到地层中，从而限制污染的储存器流体的流动，否则污染的储存器流体将来自探针上方和下方的近井筒区域，以朝向探针。

9. 发明授权

US09045955B2 Detritus flow management features for drag bit cutters and bits so equipped 有权
标题翻译： Detritus流量管理功能，用于拖刀钻头和钻头
公开(公告)号：US09045955B2
公开(公告)日：2015-06-02
申请号：US13197554
申请日：2011-08-03
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： E21B10/573 , E21B10/52 , E21B10/54
CPC分类号： E21B10/573 , E21B10/54
摘要： Rock detritus created by a drag bit cutter shearing subterranean formation material may flow under the cutter and attach itself to the side surface of the cutter barrel by differential pressure-induced sticking, and dilate. This attached material, confined by hydrostatic pressure, can create and strengthen a barrier between the cutter and the virgin rock being cut. The detritus barrier absorbs bit weight and reduces cutter efficiency by impairing contact of the cutter with the virgin rock formation. Increasing friction between the rock detritus and a side surface of the cutter barrel inhibits detritus flow, reduces build up, and allows hydrostatic pressure to contribute to, rather than inhibit, the cutting process. Similar beneficial results may be obtained when hydrostatic pressure drilling fluid is permitted to communicate through holes in the side surface of the cutter, or through an otherwise permeable side surface alleviating detritus sticking due to differential pressure effects.
摘要翻译：由刮刀切割剪切地层形成材料产生的岩石碎屑可能在切割器下方流动，并通过差压引起的粘附将其自身附着到切割机筒的侧表面并膨胀。这种被静水压力限制的附着材料可以产生并加强切割器和待切割的原始岩石之间的屏障。碎屑屏障通过削弱切割器与原始岩层的接触来吸收钻头重量并降低刀具效率。岩石碎屑与切割机筒体的侧面之间的增加的摩擦力可抑制碎屑流动，减少堆积，并允许静水压力有助于而不是抑制切割过程。当允许静水压力钻井液通过切割器的侧表面中的孔或通过另外可渗透的侧表面减轻由于压差效应引起的碎屑粘附时，可以获得类似的有益效果。

10. 发明申请

US20110297452A1 DETRITUS FLOW MANAGEMENT FEATURES FOR DRAG BIT CUTTERS AND BITS SO EQUIPPED 有权
标题翻译： DETRITUS流量管理功能，用于拖动位切割刀和刀片
公开(公告)号：US20110297452A1
公开(公告)日：2011-12-08
申请号：US13197554
申请日：2011-08-03
申请人： Leroy W. Ledgerwood, III
发明人： Leroy W. Ledgerwood, III
IPC分类号： E21B10/36
CPC分类号： E21B10/573 , E21B10/54
摘要： Rock detritus created by a drag bit cutter shearing subterranean formation material may flow under the cutter and attach itself to the side surface of the cutter barrel by differential pressure-induced sticking, and dilate. This attached material, confined by hydrostatic pressure, can create and strengthen a barrier between the cutter and the virgin rock being cut. The detritus barrier absorbs bit weight and reduces cutter efficiency by impairing contact of the cutter with the virgin rock formation. Increasing friction between the rock detritus and a side surface of the cutter barrel inhibits detritus flow, reduces build up, and allows hydrostatic pressure to contribute to, rather than inhibit, the cutting process. Similar beneficial results may be obtained when hydrostatic pressure drilling fluid is permitted to communicate through holes in the side surface of the cutter, or through an otherwise permeable side surface alleviating detritus sticking due to differential pressure effects.
摘要翻译：由刮刀切割剪切地层形成材料产生的岩石碎屑可能在切割器下方流动，并通过差压引起的粘附将其自身附着到切割机筒的侧表面并膨胀。这种被静水压力限制的附着材料可以产生并加强切割器和待切割的原始岩石之间的屏障。碎屑屏障通过削弱切割器与原始岩层的接触来吸收钻头重量并降低刀具效率。岩石碎屑与切割机筒体的侧面之间的增加的摩擦力可抑制碎屑流动，减少堆积，并允许静水压力有助于而不是抑制切割过程。当允许静水压力钻井液通过切割器的侧表面中的孔或通过另外可渗透的侧表面减轻由于压差效应引起的碎屑粘附时，可以获得类似的有益效果。

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