公开(公告)号：US5967245A

公开(公告)日：1999-10-19

申请号：US879874

申请日：1997-06-20

申请人： Gary Edward Garcia ,  Gary Ray Portwood ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne ,  Madapusi K. Keshavan

发明人： Gary Edward Garcia ,  Gary Ray Portwood ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne ,  Madapusi K. Keshavan

IPC分类号： E21B10/16 ,  E21B10/52 ,  E21B17/10

CPC分类号： E21B17/1092 ,  E21B10/16 ,  E21B10/52

摘要： A rolling cone bit includes a cone cutter having a gage row and an adjacent nestled gage row of cutter elements that are positioned on gage so as to divide or share the borehole corner cutting duty. The wear resistance, hardness, toughness and shape of the cutter elements in the adjacent rows are optimized depending upon the type of cutting the respective rows perform, the characteristics of the formation being drilled and the drilling techniques being employed. In most applications, the nestled gage cutter elements will have cutting surfaces that are more wear resistant or harder than the cutting surfaces of the gage cutter elements which experience more bottom hole duty. The nestled gage cutter elements engage the borehole wall with a negative rake angle for increased durability. Preferably, the nestled gage cutter elements have continuously contoured and non-shearing cutting surfaces.

摘要翻译： 滚动锥头包括锥形切割器，该切割器具有定位在量规上的量具行和相邻的切割器元件排列，以分割或共享钻孔角切削功能。 相邻行中的切割器元件的耐磨性，硬度，韧性和形状根据相应行执行的切割类型，被钻孔的特征和所采用的钻孔技术而优化。 在大多数应用中，配套的量具切割器元件将具有比经验更多的底坑功能的量规切割器元件的切割表面更耐磨或更硬的切割表面。 套管式切割器元件与具有负前角的钻孔壁接合以提高耐久性。 优选地，所述定位的量具切割器元件具有连续成型和非剪切切割表面。

公开(公告)号：US06510909B2

公开(公告)日：2003-01-28

申请号：US10105748

申请日：2002-03-25

申请人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

发明人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

IPC分类号： E21B1016

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

摘要： A rolling cone bit includes at least one cone cutter having a gage row of cutter elements and a first inner row of near but off-gage cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty so as to enhance bit durability, maintain borehole diameter and improve ROP. The off-gage distance of the first inner row of cutter elements is defined for various bit sizes to optimize the division of cutting duty. The distance that the first inner row of cutter elements are off-gage may be constant for all the cones on the bit or may be varied among the various cones to balance the durability and wear characteristics on all the cones of the bit.

公开(公告)号：US06390210B1

公开(公告)日：2002-05-21

申请号：US08630517

申请日：1996-04-10

申请人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

发明人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

IPC分类号： E21B1016

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

摘要： A rolling cone bit includes at least one cone cutter having a gage row of cutter elements and a first inner row of near but off-gage cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty so as to enhance bit durability, maintain borehole diameter and improve ROP. The off-gage distance of the first inner row of cutter elements is defined for various bit sizes to optimize the division of cutting duty. The distance that the first inner row of cutter elements are off-gage may be constant for all the cones on the bit or may be varied among the various cones to balance the durability and wear characteristics on all the cones of the bit.

公开(公告)号：US5833020A

公开(公告)日：1998-11-10

申请号：US667758

申请日：1996-06-21

申请人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

发明人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Dennis Cisneros ,  Chris Edward Cawthorne

IPC分类号： E21B10/16 ,  E21B10/52 ,  E21B10/56 ,  E21B10/567 ,  E21B10/50

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

摘要： A rolling cone bit includes a cone cutter having a pair of adjacent rows of cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty. The wear resistance, hardness and toughness of the cutter elements in the adjacent rows are optimized depending upon the type of cutting the respective rows perform. In most applications, the cutter elements experiencing more sidewall cutting will have cutting surfaces that are more wear resistant or harder than the cutting surfaces of cutter elements in rows experiencing more bottom hole duty. Likewise, the cutter elements exposed to more bottom hole duty will generally be tougher than those experiencing substantial sidewall cutting. The material enhancements include varying the grades of tungsten carbide used in the cutter elements and by selectively employing layers of super abrasives, such as PCD or PCBN. The cutter elements may be either inserts or steel teeth.

摘要翻译： 滚动锥头包括具有一对相邻的切割器元件排的锥形切割器，该切割器元件被定位成将侧壁和底部孔切割功能分开。 相邻行中的切割元件的耐磨性，硬度和韧性根据各行的切割类型进行优化。 在大多数应用中，经历更多侧壁切割的切割器元件将具有比经历更多底坑功能的行中的切割器元件的切割表面更耐磨或更硬的切割表面。 同样地，暴露于更多的底孔负荷的切割元件通常比那些经历大量侧壁切割的切割元件更坚硬。 材料增强包括改变切削元件中使用的碳化钨等级，并且选择性地使用超级磨料层，例如PCD或PCBN。 切割元件可以是插入件或钢齿。

公开(公告)号：US6059054A

公开(公告)日：2000-05-09

申请号：US879872

申请日：1997-06-20

申请人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Chris Edward Cawthorne ,  Scott D. McDonough

发明人： Gary Ray Portwood ,  Gary Edward Garcia ,  James Carl Minikus ,  Per Ivar Nese ,  Chris Edward Cawthorne ,  Scott D. McDonough

IPC分类号： E21B10/16 ,  E21B10/52 ,  E21B10/56 ,  E21B10/567 ,  E21B10/08

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

摘要： A cutter element that balances maximum gage-keeping capabilities with minimal tensile stress induced damage to the cutter elements is disclosed. The cutter elements of the present invention have a non-symmetrical shape and may include a more aggressive cutting profile than conventional cutter elements. In one embodiment, a cutter element is configured such that the inside angle at which its leading face intersects the wear face is less than the inside angle at which its trailing face intersects the wear face. This can also be accomplished by providing the cutter element with a relieved wear face. In another embodiment of the invention, the surfaces of the present cutter element are curvilinear and the transitions between the leading and trailing faces and the gage face are rounded, or contoured. In this embodiment, the leading transition is made sharper than the trailing transition by configuring it such that the leading transition has a smaller radius of curvature than the radius of curvature of the trailing transition. In another embodiment, the cutter element has a chamfered trailing edge such that the leading transition of the cutter element is sharper than its trailing transition. In another embodiment, the cutter element has a chamfered or contoured trailing edge in combination with a canted wear face. In still another embodiment, the cutter element includes a positive rake angle on its leading edge.

摘要翻译： 公开了一种用于平衡最大保持能力和对刀具元件的最小拉伸应力引起的损伤的切割元件。 本发明的切割元件具有非对称的形状，并且可以包括比常规切割元件更具侵蚀性的切割轮廓。 在一个实施例中，切割器元件构造成使得其前表面与磨损面相交的内角小于其后表面与磨损面相交的内角。 这也可以通过提供切割器元件具有缓解的磨损面来实现。 在本发明的另一个实施例中，本刀片元件的表面是曲线形的，并且前表面和后表面之间的过渡是圆形或轮廓。 在该实施例中，通过对其进行配置，引导转变比尾随转换更尖锐，使得前导转换的曲率半径比后跟转换的曲率半径小。 在另一个实施例中，切割器元件具有倒角后缘，使得切割器元件的前导过渡比其拖尾过渡更尖锐。 在另一个实施例中，切割器元件具有与斜面磨损面组合的倒角或轮廓后缘。 在另一个实施例中，切割器元件在其前缘上包括正的前角。

公开(公告)号：US06679342B2

公开(公告)日：2004-01-20

申请号：US10214020

申请日：2002-08-07

申请人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert Denton ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau

发明人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert Denton ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau

IPC分类号： E21B1000

CPC分类号： E21B10/25 ,  F16C21/00 ,  F16C33/7836 ,  F16C33/7896 ,  F16C2352/00 ,  Y10S277/928

摘要： A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segment and forming at least one bearing cavity therebetween. Also included is an annular primary seal disposed between the leg and the roller cone, an annular secondary seal disposed between the leg and the roller cone and between the annular primary seal and the borehole and an annular space disposed between the annular primary seal and the annular secondary seal, the annular space at least partially containing fluid and being in substantially absolute fluid isolation from the bearing cavity and a conduit for permitting the flow of fluid from the annular space to the borehole. The annular secondary seal may be primarily elastomeric and a passage for permitting the flow of fluid may further permit the flow of fluid from the borehole to the annular space. The annular space may at least partially include a grease possessing a water washout value of under approximately 50% per ASTM D-4049 water spray test for lubrication characteristics and the grease may include a polymer tackifier of between approximately 1% and approximately 5% by weight.

摘要翻译： 用于至少部分地包含钻井流体的钻孔中的钻头包括具有至少两个钻头部件的钻头体，所述钻头体包括至少一个腿部，所述腿部具有轴颈部分，以及可旋转地安装在所述轴颈部段上并形成 其间具有至少一个轴承腔。 还包括设置在腿和辊锥之间的环形主密封件，设置在腿和辊锥之间以及环形主密封件和钻孔之间的环形次级密封件，以及设置在环形主密封件和环形主密封件之间的环形空间 第二密封件，至少部分地包含流体并且与轴承腔基本上绝对的流体隔离的环形空间和用于允许流体从环形空间流到钻孔的导管。 环形二次密封件可以主要是弹性体，并且用于允许流体流动的通道可以进一步允许流体从钻孔流到环形空间。 环形空间可以至少部分地包括具有低于大约50％的水冲洗值的润滑脂，其根据ASTM D-4049喷水试验进行润滑特性，并且润滑脂可以包括约1重量％和约5重量％之间的聚合物增粘剂 。

公开(公告)号：US06196339B1

公开(公告)日：2001-03-06

申请号：US09201614

申请日：1998-11-30

申请人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

发明人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

IPC分类号： E21B1000

CPC分类号： E21B10/25 ,  F16C21/00 ,  F16C33/7836 ,  F16C33/7896 ,  F16C2352/00 ,  Y10S277/928

摘要： A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segment and forming at least one bearing cavity therebetween. Also included is an annular primary seal disposed between the leg and the roller cone and an annular secondary seal disposed between the leg and the roller cone and between the annular primary seal and the borehole. An annular space is defined between the annular primary seal and the annular secondary seal, the annular space at least partially containing fluid and being in substantially absolute fluid isolation from the bearing cavity. The seals are configured to allow the passage of a fluid from the annular space to the borehole. The annular secondary seal may be primarily elastomeric and a passage for fluid from the borehole to the annular space can be included. The annular space may at least partially include a grease possessing a water washout value of under approximately 50% per ASTM D-4049 water spray test for lubrication characteristics and the grease may include a polymer tackifier of between approximately 1% and approximately 5% by weight.

摘要翻译： 用于至少部分地包含钻井流体的钻孔中的钻头包括具有至少两个钻头部件的钻头体，所述钻头体包括至少一个腿部，所述腿部具有轴颈部分，以及可旋转地安装在所述轴颈部段上并形成 其间具有至少一个轴承腔。 还包括设置在腿部和滚子锥体之间的环形主密封件以及设置在腿部和滚子锥体之间以及环形主密封件和钻孔之间的环形副密封件。 环形空间限定在环形主密封件和环形二次密封件之间，环形空间至少部分地包含流体并且与轴承腔基本上绝对的流体隔离。 密封件构造成允许流体从环形空间通向钻孔。 环形二次密封件可以主要是弹性体，并且可以包括用于从钻孔到环形空间的流体的通道。 环形空间可以至少部分地包括具有低于大约50％的水冲洗值的润滑脂，其根据ASTM D-4049喷水试验进行润滑特性，并且润滑脂可以包括约1重量％和约5重量％之间的聚合物增粘剂 。

公开(公告)号：US06695079B2

公开(公告)日：2004-02-24

申请号：US10100100

申请日：2002-03-18

申请人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

发明人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

IPC分类号： E21B1000

CPC分类号： E21B10/25 ,  F16C21/00 ,  F16C33/7836 ,  F16C33/7896 ,  F16C2352/00 ,  Y10S277/928

摘要： A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segment and forming at least one bearing cavity therebetween. Also included is an annular primary seal disposed between the leg and the roller cone, an annular secondary seal disposed between the leg and the roller cone and between the annular primary seal and the borehole and an annular space disposed between the annular primary seal and the annular secondary seal, the annular space at least partially containing fluid and being in substantially absolute fluid isolation from the bearing cavity and a conduit for permitting the flow of fluid from the annular space to the borehole. The annular secondary seal may be primarily elastomeric and the means for permitting the flow of fluid may further permit the flow of fluid from the borehole to the annular space. The annular space may at least partially include a grease possessing a water washout value of under approximately 50% per ASTM D-4049 water spray test for lubrication characteristics and the grease may include a polymer tackifier of between approximately 1% and approximately 5% by weight.

摘要翻译： 用于至少部分地包含钻井流体的钻孔中的钻头包括具有至少两个钻头部件的钻头体，所述钻头体包括至少一个腿部，所述腿部具有轴颈部分，以及可旋转地安装在所述轴颈部段上并形成 其间具有至少一个轴承腔。 还包括设置在腿和辊锥之间的环形主密封件，设置在腿和辊锥之间以及环形主密封件和钻孔之间的环形次级密封件，以及设置在环形主密封件和环形主密封件之间的环形空间 第二密封件，至少部分地包含流体并且与轴承腔基本上绝对的流体隔离的环形空间和用于允许流体从环形空间流到钻孔的导管。 环形二次密封件可以主要是弹性体，并且用于允许流体流动的装置还可以允许流体从钻孔流到环形空间。 环形空间可以至少部分地包括具有低于大约50％的水冲洗值的润滑脂，其根据ASTM D-4049喷水试验进行润滑特性，并且润滑脂可以包括约1重量％和约5重量％之间的聚合物增粘剂 。

公开(公告)号：US06431293B1

公开(公告)日：2002-08-13

申请号：US09687686

申请日：2000-10-13

申请人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

发明人： Gary Ray Portwood ,  Chris Edward Cawthorne ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Peter Cariveau ,  Robert Denton

IPC分类号： E21B1000

CPC分类号： E21B10/25 ,  F16C21/00 ,  F16C33/7836 ,  F16C33/7896 ,  F16C2352/00 ,  Y10S277/928

摘要： A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segment and forming at least one bearing cavity therebetween. Also included is an annular primary seal disposed between the leg and the roller cone and an annular secondary seal disposed between the leg and the roller cone and between the annular primary seal and the borehole. An annular space is defined between the annular primary seal and the annular secondary seal, the annular space at least partially containing fluid and being in substantially absolute fluid isolation from the bearing cavity. The seals are configured to allow the passage of a fluid from the annular space to the borehole. The annular secondary seal may be primarily elastomeric and a passage for fluid from the borehole to the annular space can be included. The annular space may at least partially include a grease possessing a water washout value of under approximately 50% per ASTM D-4049 water spray test for lubrication characteristics and the grease may include a polymer tackifier of between approximately 1% and approximately 5% by weight.

摘要翻译： 用于至少部分地包含钻井流体的钻孔中的钻头包括具有至少两个钻头部件的钻头体，所述钻头体包括至少一个腿部，所述腿部具有轴颈部分，以及可旋转地安装在所述轴颈部段上并形成 其间具有至少一个轴承腔。 还包括设置在腿部和滚子锥体之间的环形主密封件以及设置在腿部和滚子锥体之间以及环形主密封件和钻孔之间的环形副密封件。 环形空间限定在环形主密封件和环形二次密封件之间，环形空间至少部分地包含流体并且与轴承腔基本上绝对的流体隔离。 密封件构造成允许流体从环形空间通向钻孔。 环形二次密封件可以主要是弹性体，并且可以包括用于从钻孔到环形空间的流体的通道。 环形空间可以至少部分地包括具有低于大约50％的水冲洗值的润滑脂，其根据ASTM D-4049喷水试验进行润滑特性，并且润滑脂可以包括约1重量％和约5重量％之间的聚合物增粘剂 。

公开(公告)号：US6033117A

公开(公告)日：2000-03-07

申请号：US982081

申请日：1997-12-01

申请人： Peter Cariveau ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Chris Edward Cawthorne ,  Gary Ray Portwood

发明人： Peter Cariveau ,  Robert H. Slaughter, Jr. ,  Roger Didericksen ,  Chris Edward Cawthorne ,  Gary Ray Portwood

IPC分类号： E21B10/22 ,  E21B10/25 ,  F16C33/72

CPC分类号： E21B10/25 ,  F16C19/49 ,  F16C33/7836 ,  F16C33/7896 ,  F16C21/00 ,  F16C2352/00

摘要： A sealed-bearing drill bit for use in an earthen annulus is provided having a dual seal arrangement. The drill bit includes at least one leg having a journal segment, and a roller cone mounted upon the journal segment and forming at least one bearing cavity therebetween. An annular primary seal is disposed between the leg and roller cone and between the bearing cavity and the earthen annulus. An annular secondary seal is disposed between the annular primary seal and the earthen annulus and is capable of substantially preventing the ingress of debris from the earthen annulus to the annular primary seal.

摘要翻译： 提供了一种用于土层环形的密封钻头，具有双重密封装置。 所述钻头包括至少一个具有轴颈段的支脚和安装在所述轴颈段上并在其间形成至少一个轴承腔的滚子锥。 环形主密封件设置在腿部和滚子锥体之间以及轴承腔和土体环之间。 环形二次密封件设置在环形主密封件和土层环之间，并且能够基本上防止碎屑从土层环进入环形主密封件。