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1. 发明授权

US06648082B2 Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator 有权
公开(公告)号：US06648082B2
公开(公告)日：2003-11-18
申请号：US10040304
申请日：2001-10-26
申请人： Roger L. Schultz , Orlando De Jesus , Andrew J. Osborne, Jr.
发明人： Roger L. Schultz , Orlando De Jesus , Andrew J. Osborne, Jr.
IPC分类号： E21B1000
CPC分类号： E21B47/18 , E21B12/02 , E21B41/0085 , E21B44/00 , E21B2041/0028
摘要： An apparatus and accompanying method for monitoring and reporting downhole bit failure. Individual sensors are placed on a sub which is separate from the drill bit itself, and are powered by a vibration driven power system. The sensor readings are used to compute values which represent the ratios of sensor readings on one sensor in relation to the readings of one or more other sensors. This creates a self-calibrating sensor system that accounts for changes in downhole conditions which might cause sensor readings to fluctuate, but which do not indicate failure.

2. 发明授权

US06494275B2 Rock drill bit having retrac teeth and method for its manufacturing 失效
标题翻译：具有回切齿的岩石钻头及其制造方法
公开(公告)号：US06494275B2
公开(公告)日：2002-12-17
申请号：US09796440
申请日：2001-03-02
申请人： Bengt Åsberg , Kenneth Larsson , Bertil Ederyd
发明人： Bengt Åsberg , Kenneth Larsson , Bertil Ederyd
IPC分类号： E21B1000
CPC分类号： E21B17/1092 , E21B10/003 , E21B10/36 , E21B10/38 , E21B17/0426
摘要： A rock drill bit for percussive drilling, especially top hammer drilling, includes a bit head provided with front rock crushing buttons and a skirt. The bit head is provided with a number of grooves formed in the outside of the skirt and extending in the axial direction of the drill bit. Protruding lands are defined between the grooves, which likewise extend in the axial direction. Axially rearward ends of at least some of the lands are formed with retrac teeth. Each retrac tooth has a cutting edge extending along an outer circumference of the skirt.
摘要翻译：一种用于冲击钻的岩石钻头，特别是顶锤式钻孔，包括一个带有前部岩石破碎按钮和裙部的钻头头。该钻头头设置有形成在裙部外侧并在钻头的轴向方向上延伸的若干槽。凹槽之间被限定在凹槽之间，凹槽同样在轴向方向上延伸。至少一些焊盘的轴向后端形成有回拉齿。每个后掠齿具有沿裙部的外周延伸的切割边缘。

3. 发明授权

US06454028B1 Wear resistant drill bit 有权
公开(公告)号：US06454028B1
公开(公告)日：2002-09-24
申请号：US09754434
申请日：2001-01-04
申请人： Stephen M. Evans
发明人： Stephen M. Evans
IPC分类号： E21B1000
CPC分类号： C22C29/08 , B22F2005/001 , B22F2998/00 , B22F2999/00 , E21B10/46 , B22F2207/07 , B22F1/0048
摘要： A wear resistant drill bit of the matrix bodied type has a bit body comprising a tungsten carbide material bound with a binder material, wherein the tungsten carbide material includes at least some tungsten carbide particles of generally spherical shape. The tungsten carbide material includes particles having a relatively hard central core and a softer skin. The skin includes a large proportion of a high temperature phase of tungsten carbide.

4. 发明授权

US06357539B1 Apparatus for retrieving metal objects from a wellbore 有权
标题翻译：用于从井眼检索金属物体的装置
公开(公告)号：US06357539B1
公开(公告)日：2002-03-19
申请号：US09602379
申请日：2000-06-22
申请人： David J. Ruttley
发明人： David J. Ruttley
IPC分类号： E21B1000
CPC分类号： E21B37/00 , E21B31/06 , E21B41/00
摘要： A tool for retrieving metal objects from a wellbore has a plurality of magnet assemblies spaced longitudinally along a tool body. Each magnet assembly has a plurality of magnet members, which can be arcuate or longitudinal, covering a majority surface area of the tool body. In the embodiment of the invention having longitudinal members, magnet protectors are secured immediately adjacent to a corresponding magnet member for deflecting striking force of the metal particles being attracted to the magnet during rotation of the tool. A trap space if formed between the magnet and an adjacent magnet protector for retaining more metal particles within the magnet assemblies.
摘要翻译：用于从井眼拾取金属物体的工具具有沿工具主体纵向间隔开的多个磁体组件。每个磁体组件具有多个磁体构件，其可以是弓形的或纵向的，覆盖工具主体的大部分表面区域。在具有纵向构件的本发明的实施例中，磁体保护器紧邻相应的磁体构件固定，用于在工具旋转期间偏转吸引到磁体的金属颗粒的撞击力。如果形成在磁体和相邻的磁体保护器之间形成的陷阱空间，用于将更多的金属颗粒保持在磁体组件内。

5. 发明授权

US06290008B1 Inserts for earth-boring bits 有权
标题翻译：插入钻孔钻头
公开(公告)号：US06290008B1
公开(公告)日：2001-09-18
申请号：US09206827
申请日：1998-12-07
申请人： Gary R. Portwood , Michael A. Siracki
发明人： Gary R. Portwood , Michael A. Siracki
IPC分类号： E21B1000
CPC分类号： E21B10/5676 , E21B10/52
摘要： A polycrystalline diamond enhanced insert is disclosed. The insert includes a body portion adapted for attachment to an earth-boring bit and a top portion for contacting an earthen formation. The top portion of the insert is provided with two different compositions of polycrystalline diamond. In the primary surface of the top portion, a tougher or less wear-resistant polycrystalline diamond layer is provided, whereas a more wear-resistant polycrystalline diamond layer is provided in the remaining region of the top portion. In addition to polycrystalline diamond, polycrystalline boron nitride and other superhard materials also may be used.
摘要翻译：公开了一种多晶金刚石增强型插入件。插入件包括适于附接到钻地钻头的主体部分和用于接触土层的顶部部分。插入件的顶部设置有两种不同的多晶金刚石组合物。在顶部的主表面中，提供更坚韧或更少的耐磨多晶金刚石层，而在顶部的剩余区域中提供更耐磨的多晶金刚石层。除了多晶金刚石之外，还可以使用多晶氮化硼和其他超硬材料。

6. 发明授权

US06196339B1 Dual-seal drill bit pressure communication system 有权
标题翻译：双密封钻头压力通讯系统
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。

7. 发明授权

US06695079B2 Dual-seal drill bit pressure communication system 有权
标题翻译：双密封钻头压力通讯系统
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。

8. 发明授权

US06615936B1 Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits 失效
标题翻译：将表面涂布在基材上的方法及其在研磨磨牙钻头的施工中的应用
公开(公告)号：US06615936B1
公开(公告)日：2003-09-09
申请号：US09552534
申请日：2000-04-19
申请人： Nephi M. Mourik , J. Albert Sue , Alysia C. White
发明人： Nephi M. Mourik , J. Albert Sue , Alysia C. White
IPC分类号： E21B1000
CPC分类号： B23K15/0086 , E21B10/50
摘要： A method for applying hardfacing to teeth on a drill bit is disclosed. The method includes applying the hardfacing to at least one of the teeth so as to have a thickness selected to correspond to a position about exterior surface of the tooth. In one embodiment, the hardfacing thickness is increased near the crest of the tooth, and is decreased near the root of the tooth on at least one flank of the tooth. In one embodiment, the thickness is selected by controlling the powder flow rate in a plasma transferred arc welding system. In another embodiment an angle subtended by flanks of the tooth is selected to provide increased strength to the tooth, and the hardfacing is applied to the tooth to cause exterior surfaces of the hardfacing corresponding to the flanks to subtend an angle selected to provide increased penetration of the tooth through earth formations while drilling.
摘要翻译：公开了一种在钻头上对牙齿施加耐磨性的方法。该方法包括将硬面施加到至少一个齿，以便具有被选择为对应于关于牙的外表面的位置的厚度。在一个实施例中，在牙齿顶部附近增硬表面厚度，并且在牙齿的至少一个侧面上在齿根部附近减小。在一个实施例中，通过控制等离子体转移电弧焊接系统中的粉末流速来选择厚度。在另一个实施例中，选择齿的侧面对着的角度以提供对牙齿的增强的强度，并且将表面硬化施加到牙齿上，使得对应于侧面的硬化面的外表面对着所选择的角度以提供增加的渗透在钻孔时通过地层形成齿。

9. 发明授权

US06615935B2 Roller cone bits with wear and fracture resistant surface 有权
$Roller cone bits with wear and fracture resistant surface$
公开(公告)号：US06615935B2
公开(公告)日：2003-09-09
申请号：US09846745
申请日：2001-05-01
申请人： Zhigang Fang , Anthony Griffo , Alysia C. White , Chris Cawthorne
发明人： Zhigang Fang , Anthony Griffo , Alysia C. White , Chris Cawthorne
IPC分类号： E21B1000
CPC分类号： B22F1/0003 , B22F7/06 , B22F2005/001 , B22F2999/00 , C22C32/00 , E21B10/08 , E21B10/50 , B22F3/22
摘要： Rock bits comprising wear and fracture resistant surface of this invention include a steel bit body having at least one leg extending therefrom. A steel cone is rotatably disposed on the leg. The steel cone includes a plurality of steel cutting elements that each projecting outwardly a distance therefrom. At least a portion of the cone comprises a wear resistant surface formed from a wear resistant composite material. The wear resistant composite material is made by the process of combining powders selected from the group consisting of carbides, borides, nitrides, carbonitrides, refractory metals, cermets, Co, Fe, Ni, steel, and combinations thereof, to form a material mixture. The material mixture is applied onto a designated surface of the cone, in one form or another, when the cone is in a pre-existing rigid state. Depending on the particular application, the material mixture can be applied in as a slurry to the designated surface of the cone to form a coating thereon. Alternatively, the material mixture can be preformed into a green part that is configured to be placed over the designated surface prior to being disposed thereon. The material mixture is then pressurized under conditions of elevated temperature to form the wear resistant surface. In the event that the material mixture is preformed into a green part, the preformed green part can be sintered prior to its placement on the designated cone surface. The sintered part can then be attached to the cone surface by brazing process.

10. 发明授权

US06431293B1 Dual-seal drill bit pressure communication system 有权
标题翻译：双密封钻头压力通讯系统
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。

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