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1. 发明公开

EP2118432A1 ROTARY DRAG BIT AND METHODS THEREFOR 审中-公开
标题翻译：旋转拖动钻头及其方法
公开(公告)号：EP2118432A1
公开(公告)日：2009-11-18
申请号：EP08728351.1
申请日：2008-01-25
申请人： BAKER HUGHES INCORPORATED
发明人： MCCLAIN, Eric, E. , GAVIA, David , SNELL, Lane, E. , HOINES, Jason, E. , ISBELL, Matthew, R. , DOSTER, Michael, L.
IPC分类号： E21B10/43
CPC分类号： E21B10/55 , E21B10/43
摘要： A rotary drag bit includes a primary cutter row (141) comprising at least one primary cutter, and at least two additional cutters configured relative to one another (19, 20, 21). In one embodiment, the cutters are backup cutters of a cutter group located in respective first and second trailing cutter rows (153), oriented relative to one another, and positioned to substantially follow the at least one primary cutter The rotary drag bit life is extended by the backup cutter group, making the bit more durable and extending the life of the cutters In other of the embodiments, the cutters are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters Still other embodiments of rotary drag bits include backup cutter configurations having different backrake angles and siderake angles, including methods therefor.
摘要翻译：旋转刮刀钻头包括包括至少一个主切割器的主切割器行（141）和相对于彼此（19,20,21）构造的至少两个另外的切割器。在一个实施例中，切割器是位于相应的第一和第二拖尾切割器排（153）中的切割器组的后备切割器，其相对于彼此定向并且定位成基本跟随至少一个主切割器。旋转拖拉钻头寿命延长通过备用刀具组使钻头更耐用并且延长刀具的使用寿命。在其他实施例中，刀具被构造成选择性地接合正在钻探的地下地层材料，从而提供改善的钻头寿命并减小刀具上的应力。旋转刮刀钻头的实施例包括具有不同的后倾角和侧倾角的备用切割器配置，包括其方法。

2. 发明授权

EP2220330B1 DRILL BITS AND TOOLS FOR SUBTERRANEAN DRILLING 有权
标题翻译：位和工具地下钻
公开(公告)号：EP2220330B1
公开(公告)日：2012-09-12
申请号：EP08845360.0
申请日：2008-10-29
申请人： Baker Hughes Incorporated
发明人： GREEN, James, C. , DOSTER, Michael, L. , HOINES, Jason, E. , WELCH, Robert, M. , ROBERTS, Danielle, V.
IPC分类号： E21B10/42 , E21B10/43
CPC分类号： E21B10/42 , E21B10/43

3. 发明公开

EP2220330A1 DRILL BITS AND TOOLS FOR SUBTERRANEAN DRILLING 有权
标题翻译：位和工具地下钻
公开(公告)号：EP2220330A1
公开(公告)日：2010-08-25
申请号：EP08845360.0
申请日：2008-10-29
申请人： Baker Hughes Incorporated
发明人： GREEN, James, C. , DOSTER, Michael, L. , HOINES, Jason, E. , WELCH, Robert, M. , ROBERTS, Danielle, V.
IPC分类号： E21B10/42 , E21B10/43
CPC分类号： E21B10/42 , E21B10/43
摘要： A drill bit having a bit body includes a blade face surface on at least one blade extending longitudinally and radially outward over a face of the bit body. The blade face surface of the at least one blade includes a contact zone and a sweep zone. The sweep zone rotationally trials the contact zone with respect to a direction of intended bit rotation about a longitudinal axis of the bit body, which reduces rubbing contact when engaging with a subterranean formation.

4. 发明公开

EP2118430A2 ROTARY DRAG BIT 审中-公开
标题翻译：旋转拖动位
公开(公告)号：EP2118430A2
公开(公告)日：2009-11-18
申请号：EP08724767.2
申请日：2008-01-24
申请人： BAKER HUGHES INCORPORATED
发明人： SNELL, Lane, E. , GAVIA, David , HOINES, Jason, E. , HANFORD, Ryan, J. , ISBELL, Matthew, R. , MCCLAIN, Eric, E. , DOSTER, Michael, L.
IPC分类号： E21B10/43
CPC分类号： E21B10/55 , E21B10/43
摘要： A rotary drag bit (110) includes a primary cutter row (143) comprising at least one primary' cutter (11) and a multiple backup cutter, group (153). The multiple backup cutter group comprises a first and second trailing cutter row (154, 155), each comprising at least one cutter positioned to follow the at least one primary cutter. The rotary drag bit life is extended by the multiple backup cutter group, making the bit more durable and extending the life of the cutters. Further, the cutters of the multiple backup cutter group are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters. Other embodiments of rotary drag bits are provided.
摘要翻译：旋转刮刀钻头（110）包括主切割器行（143），该主切割器行（143）包括至少一个主切割器（11）和多备用刀具组（153）。该多重备份切割器组包括第一和第二尾随切割器行（154,155），每个包括至少一个切割器，该至少一个切割器被定位成跟随该至少一个主切割器。旋转式刮刀的使用寿命由多重备份切刀组延长，使钻头更耐用，延长了刀具的使用寿命。此外，多个备用切割器组的切割器被配置为选择性地接合正在钻探的地下地层材料，从而提供改善的钻头寿命并减小切割器上的应力。提供了旋转刮刀的其他实施例。

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