公开(公告)号：US20060054357A1

公开(公告)日：2006-03-16

申请号：US10938069

申请日：2004-09-10

申请人： Prabhakaran Centala ,  James Larsen ,  Mohammed Boudrare

发明人： Prabhakaran Centala ,  James Larsen ,  Mohammed Boudrare

IPC分类号： E21B10/18

CPC分类号： E21B10/08 ,  E21B10/086 ,  E21B10/18 ,  Y10T29/49826

摘要： A two-cone drill bit with a hydraulic arrangement that can be used for one or more of the following: cleaning roller cones, impinging on a hole bottom, or inducing a helical flow field. A two-cone drill bit having a bit body formed from two leg sections and two spacing members. Methods of manufacturing a two-cone drill bit. Methods of improving hydraulics of a two-cone drill bit.

摘要翻译： 具有液压装置的双锥钻头可用于以下一个或多个：清洁滚筒锥体，撞击孔底部或引起螺旋流场。 一种双锥钻头，其具有由两个腿部段和两个间隔构件形成的钻头体。 制造双锥钻头的方法。 改进双锥钻头液压系统的方法。

公开(公告)号：US20060011388A1

公开(公告)日：2006-01-19

申请号：US11151495

申请日：2005-06-13

申请人： Mohammed Boudrare ,  Prabhakaran Centala ,  Scott McDonough ,  Zhou Yong ,  Vincent Shotton

发明人： Mohammed Boudrare ,  Prabhakaran Centala ,  Scott McDonough ,  Zhou Yong ,  Vincent Shotton

IPC分类号： E21B10/36

CPC分类号： E21B10/5673 ,  E21B10/16 ,  E21B10/52 ,  E21B10/58

摘要： A cutting element is disclosed having multiple cutting extensions extending from the base portion and separated by valleys. The cutting extensions of the cutting element include both crested and rounded shapes. The cutting extensions may differ in extension height, shape, extension angle, cant angle, and crest angle in other characteristics such as in material properties such as wear resistance, hardness and fracture toughness. The cutting elements have particular, but not exclusive, application in the nose portion of the cone cutters of a rolling cone bit.

摘要翻译： 公开了一种切割元件，其具有从基部延伸并由谷分隔的多个切割延伸部。 切割元件的切割延伸部分包括顶部和圆形。 在诸如耐磨性，硬度和断裂韧性等材料性能的其他特性中，切割延伸部可以在延伸高度，形状，延伸角，倾角和峰值角度上不同。 切割元件在滚动锥形钻头的锥形切割器的鼻部中具有特殊但非排他性的应用。

公开(公告)号：US20060054361A1

公开(公告)日：2006-03-16

申请号：US10938068

申请日：2004-09-10

申请人： Mohammed Boudrare ,  Prabhakaran Centala

发明人： Mohammed Boudrare ,  Prabhakaran Centala

IPC分类号： E21B10/36 ,  E21B10/08

CPC分类号： E21B10/086 ,  E21B10/08 ,  E21B10/16

摘要： A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a bottom hole coverage greater than about 17 percent is achieved per revolution of the two-cone drill bit.

公开(公告)号：US20080099252A1

公开(公告)日：2008-05-01

申请号：US11970345

申请日：2008-01-07

申请人： Mohammed Boudrare ,  Prabhakaran Centala

发明人： Mohammed Boudrare ,  Prabhakaran Centala

IPC分类号： E21B10/38

CPC分类号： E21B10/086 ,  E21B10/08 ,  E21B10/16

摘要： A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a bottom hole coverage greater than about 17 percent is achieved per revolution of the two-cone drill bit.

摘要翻译： 双锥钻头表现出改善的稳定性。 在一个实施例中，双锥钻头具有布置成具有约145度至约166度之间的锥形分离角度的第一和第二辊锥。 在一些实施例中，双锥钻头具有布置在滚子锥体上的多个切割元件，使得每一圆锥钻头实现了大于约17％的底孔覆盖率。

公开(公告)号：US20070062736A1

公开(公告)日：2007-03-22

申请号：US11232434

申请日：2005-09-21

申请人： Peter Cariveau ,  Prabhakaran Centala ,  Zhehua Zhang

发明人： Peter Cariveau ,  Prabhakaran Centala ,  Zhehua Zhang

IPC分类号： E21B10/00

CPC分类号： E21B10/12 ,  E21B10/16

摘要： The invention provides an improved drill bit and a method for designing thereof. The drill bit includes a bit body, a journal depending from the bit body, and a disc rotatably mounted on the journal. The disc of the drill bit has PDC cutting elements disposed on it. Also provided is an improved cutting structure for the discs of the drill bit. The cutting structure includes a portion that is comprised from PDC.

摘要翻译： 本发明提供了一种改进的钻头及其设计方法。 钻头包括钻头本体，从钻头体悬垂的轴颈以及可旋转地安装在轴颈上的圆盘。 钻头的盘具有设置在其上的PDC切割元件。 还提供了用于钻头的盘的改进的切割结构。 切割结构包括由PDC组成的部分。

公开(公告)号：US20050015230A1

公开(公告)日：2005-01-20

申请号：US10890524

申请日：2004-07-13

申请人： Prabhakaran Centala ,  Mohamed Boudrare ,  Sujian Huang

发明人： Prabhakaran Centala ,  Mohamed Boudrare ,  Sujian Huang

IPC分类号： E21B10/08 ,  G06G7/48

CPC分类号： E21B10/08

摘要： A method for designing a bit for boring earth formations includes defining parameters for a calculation, where the parameters relate to a geometry of the bit, calculating to determine interference between the bit and the earth formations, obtaining vertical displacements with respect to a bit revolution based on the interference between the bit and the earth formations and applying a criterion to the vertical displacements to evaluate bit performance.

摘要翻译： 用于设计用于镗孔地层的钻头的方法包括定义用于计算的参数，其中参数涉及钻头的几何形状，计算以确定钻头和地层之间的干涉，获得相对于基于位旋转的垂直位移 关于位和地层之间的干扰，并对垂直位移应用一个标准来评估位性能。