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公开(公告)号：US06782959B2
公开(公告)日：2004-08-31
申请号：US10436709
申请日：2003-05-13
申请人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran , Quan V. Nguyen
发明人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran , Quan V. Nguyen
IPC分类号： E21B1008
摘要： A cutter element for a drill bit has a crest that defines a crest line. The crest can be non-rectilinear. The crest line of each cutter element defines an angle with respect to the axis of the rolling cone on which the cutter element is mounted. The cutter elements define different angles with respect to the cone axis and with respect to each other.
摘要翻译： 用于钻头的切割元件具有限定顶部线的波峰。 波峰可以是非直线的。 每个切割器元件的顶部线相对于其上安装有切割器元件的滚动锥体的轴线形成一个角度。 刀具元件相对于锥体轴线相对于彼此限定不同的角度。
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公开(公告)号：US06561293B2
公开(公告)日：2003-05-13
申请号：US09858160
申请日：2001-05-15
申请人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran , Quan V. Nguyen
发明人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran , Quan V. Nguyen
IPC分类号： E21B1008
摘要： A cutter element for a drill bit has a non-rectilinear crest. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.
摘要翻译： 用于钻头的切割元件具有非直线顶部。 切割器元件具有基部和延伸部分，并且延伸部分相对于基部具有零牵伸或负牵伸。 非正吃草允许更多的钻孔底部使用较少的切割元件被刮除。 具有非正吸程度的刀具元件可以是碳化钨刀片或钢齿。
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公开(公告)号：US6161634A
公开(公告)日：2000-12-19
申请号：US146154
申请日：1998-09-03
申请人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran
发明人： James C. Minikus , Chris E. Cawthorne , Stephen C. Steinke , Gary R. Portwood , Gary E. Garcia , David P. Moran
摘要： A cutter element for a drill bit. The cutter element has a non-rectilinear crest. The non-rectilinear or curvilinear crest provides an advantageous distribution of the cutting forces across the body of the cutter elements and thus improves bit life. The curvilinear crest also allows the cutter element to more efficiently lift the portion of the formation that is being cut, thereby improving cutting action in certain formations. The cutter elements can have either positive or non-positive draft and can be tungsten carbide inserts.
摘要翻译： 用于钻头的刀具元件。 切割元件具有非直线波峰。 非直线或曲线波峰提供切割力跨越刀具元件主体的有利分布，从而提高钻头寿命。 曲线波峰还允许切割器元件更有效地提升被切割的地层的部分，从而改善某些地层的切割动作。 切割元件可以具有正或非正的通风并且可以是碳化钨插入物。
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公开(公告)号：US06367568B1
公开(公告)日：2002-04-09
申请号：US09858138
申请日：2001-05-15
IPC分类号： E21B1008
摘要： A cutter element for a drill bit. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.
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公开(公告)号：US06241034B1
公开(公告)日：2001-06-05
申请号：US09146095
申请日：1998-09-03
IPC分类号： E21B1008
摘要： A cutter element for a drill bit. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.
摘要翻译： 用于钻头的刀具元件。 切割器元件具有基部和延伸部分，并且延伸部分相对于基部具有零牵伸或负牵伸。 非正吃草允许更多的钻孔底部使用较少的切割元件被刮除。 具有非正吸程度的刀具元件可以是碳化钨刀片或钢齿。
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