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1. 发明授权

US4632401A Hermetically welded belleville seal for rock bits 失效
标题翻译：密封用于岩石的贝尔维尔密封
公开(公告)号：US4632401A
公开(公告)日：1986-12-30
申请号：US735401
申请日：1985-05-17
申请人： Nareshchandra J. Kar , Cary A. Roth
发明人： Nareshchandra J. Kar , Cary A. Roth
IPC分类号： B23K26/28 , E21B10/22 , E21B10/25 , F16C33/78 , F16J15/32 , F16J15/34 , B23P19/04
CPC分类号： E21B10/25 , B23K26/28 , F16C33/72 , F16C33/78 , F16J15/3276 , F16J15/3456 , F16C2352/00 , Y10S277/922 , Y10T29/49719 , Y10T29/53104
摘要： A belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the static ring portion of the belleville seal and the outside diameter of the journal bearing is circumferentially welded using a high-energy beam source to form a hermetically sealed metallurgical bond therebetween.
摘要翻译：密封轴承旋转锥形钻头的贝尔维尔密封圈。环形密封圈的内部静环部分是金属的，并且被过盈配合在轴颈轴承的基座上。在贝氏密封件的静环部分的内径和轴颈轴承的外径之间形成的分离接头使用高能束源周向地焊接，以在它们之间形成气密密封的冶金结合。

2. 发明授权

US4560175A Hermetically welded belleville seal for rocks bits 失效
标题翻译：气密焊接贝尔维尔密封岩石钻头
公开(公告)号：US4560175A
公开(公告)日：1985-12-24
申请号：US628068
申请日：1984-07-05
申请人： Nareshchandra J. Kar , Cary A. Roth
发明人： Nareshchandra J. Kar , Cary A. Roth
IPC分类号： B23K26/28 , E21B10/22 , E21B10/25 , F16C33/78 , F16J15/32 , F16J15/34 , F16C19/49
CPC分类号： E21B10/25 , B23K26/28 , F16C33/72 , F16C33/78 , F16J15/3276 , F16J15/3456 , F16C2352/00
摘要： This invention relates to a belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the static ring portion of the belleville seal and the outside diameter of the journal bearing is circumferentially welded using a high-energy beam source to form a hermetically sealed metallurgical bond therebetween.
摘要翻译：本发明涉及用于密封轴承旋转锥形钻头的贝尔维尔密封件。环形密封圈的内部静环部分是金属的，并且被过盈配合在轴颈轴承的基座上。在贝氏密封件的静环部分的内径和轴颈轴承的外径之间形成的分离接头使用高能束源周向地焊接，以在它们之间形成气密密封的冶金结合。

3. 发明授权

US4708752A Process for laser hardening drilling bit cones having hard cutter inserts placed therein 失效
标题翻译：具有放置在其中的硬切削刀片的激光淬火钻头锥的方法
公开(公告)号：US4708752A
公开(公告)日：1987-11-24
申请号：US843048
申请日：1986-03-24
申请人： Nareshchandra J. Kar
发明人： Nareshchandra J. Kar
IPC分类号： C21D1/09 , C21D1/70 , C21D9/22 , C21D9/40 , E21B10/22 , E21B10/50 , E21B10/52
CPC分类号： C21D1/09 , C21D9/40 , E21B10/22 , E21B10/50 , E21B10/52 , Y10S148/903
摘要： A medium to high carbon steel body of a roller cone for a drilling bit is machined to final dimensions, and is thereafter rendered absorbent to laser light by application of black paint or black etch. Holes for hard tungsten carbide or like inserts are drilled in the light absorbent steel body. The entire steel body, including the holes, is subjected to a laser treatment which, however, is effective to raise to above austenitizing temperature only the dark light absorbent surfaces. Walls of the insert holes, being shiny, reflect the laser light and are not effected by it. Rapid self-quenching of the laser heated surfaces results in a hard martensitic layer in the external surface, with a surface hardness of 57 to 60 Rockwell C units. The seal gland, heel, and spindle bore areas of the roller cones are hardened similarly by exposure to laser light. In an alternative process, the hard tungsten carbide or like inserts are press fitted into the holes before the laser treatment. The subsequent laser treatment does not affect the inserts adversely, because the inserts, too, have shiny light reflective surfaces, and therefore do not absorb the laser light.
摘要翻译：将用于钻头的辊锥的中高碳钢体加工成最终尺寸，然后通过施加黑色涂料或黑色蚀刻使其吸收至激光。用于硬碳化钨或类似插入件的孔在吸光钢体中钻出。包括孔的整个钢体经受激光处理，然而，其仅有效地提高到奥氏体化温度以上的暗光吸收表面。插入孔的壁光亮，反映了激光，不受其影响。激光加热表面的快速自淬火导致外表面的硬质马氏体层，表面硬度为57至60洛氏硬度单位。滚子锥体的密封盖，跟部和主轴孔面积通过暴露于激光上而被硬化。在替代方法中，硬化碳化钨或类似的插入件在激光处理之前被压配合到孔中。随后的激光处理不会不利地影响插入物，因为插入件也具有闪亮的光反射表面，因此不吸收激光。

4. 发明授权

US4683781A Cast steel rock bit cutter cones having metallurgically bonded cutter inserts, and process for making the same 失效
标题翻译：具有冶金结合刀片刀片的铸钢钻头铣刀锥及其制造方法
公开(公告)号：US4683781A
公开(公告)日：1987-08-04
申请号：US897228
申请日：1986-08-15
申请人： Nareshchandra J. Kar , William J. Salesky , Steven J. Guzowski
发明人： Nareshchandra J. Kar , William J. Salesky , Steven J. Guzowski
IPC分类号： B22D19/06 , E21B10/52
CPC分类号： B22D19/06 , E21B10/52 , Y10S76/11
摘要： Tools, and particularly rock bit cutter cones, having "hard" cermet cutter inserts enveloped in an intermediate layer or coating of a suitable high melting metal, and embedded in a cast steel matrix, are disclosed. The cermet inserts, which usually comprise tungsten carbide in a cobalt phase (WC-Co), are coated with a layer of a metal or metal alloy, preferably nickel, which does not substantially melt during the subsequent step of casting the steel matrix of the tool. An additional layer of copper is advantageously employed on the cermet insert beneath the layer of the high melting metal, such as nickel. The coated inserts are held in appropriate position in a suitable mold, and the steel matrix of the tool is poured from molten metal. The coatings on the cermet inserts prevent thermal shock to the inserts, prevent deterioration of the cermet due to diffusion of carbon into the adjacent steel, and metallurgically bond the inserts to the embedding steel matrix.
摘要翻译：公开了包括在中间层中的“硬”金属陶瓷切削刀片或合适的高熔点金属涂层并嵌入铸钢基体中的工具，特别是钻头切削锥。通常包含钴相（WC-Co）中的碳化钨的金属陶瓷插入物涂覆有一层金属或金属合金，优选镍，其在后续的铸造钢基体的步骤中基本上不熔化工具。在金属陶瓷插入件之下的高熔点金属（例如镍）的下方有利地使用另外的铜层。将涂覆的刀片保持在合适的模具中的适当位置，并且将该工具的钢基体从熔融金属中注入。金属陶瓷插件上的涂层防止对插入物的热冲击，防止由于碳扩散到相邻的钢中而导致金属陶瓷的劣化，并将插入件冶金结合到嵌入钢基体。

5. 发明授权

US4429854A Dual squeeze seal gland 失效
标题翻译：双挤压密封胶
公开(公告)号：US4429854A
公开(公告)日：1984-02-07
申请号：US444549
申请日：1982-11-26
申请人： Nareshchandra J. Kar , Rao R. Nimmagadda
发明人： Nareshchandra J. Kar , Rao R. Nimmagadda
IPC分类号： E21B10/22 , E21B10/25 , F16J15/16 , F16J15/32 , E21B10/08
CPC分类号： E21B10/25 , F16J15/164 , F16J15/32 , Y10S277/91 , Y10S277/931
摘要： A resilient O-ring shaft seal for use in a rotary rock bit is described wherein the degree of squeeze imposed upon the O-ring seal is increased in one or more discrete steps, occurring as drilling conditions or bearing deterioration cause rising temperatures to be imposed on the seal. The squeeze is increased in discrete steps through a thermally related shape change in one or more nitinol, or the like, back up rings positioned adjacent to the packing ring seal housed within a seal gland. The seal gland is formed between a rock bit journal and a rock cutter cone rotatably mounted to the journal.
摘要翻译：描述了一种用于旋转岩石钻头的弹性O型圈轴密封件，其中施加在O形圈密封件上的挤压程度在一个或多个离散步骤中增加，当钻井条件或轴承变形导致施加升高的温度时发生在印章上。通过在一个或多个镍钛诺等中的热相关的形状变化，挤压在离散的步骤中增加，所述相邻的形状改变位于与容纳在密封压盖内的密封环密封件相邻的位置。密封盖形成在岩石钻头轴颈和可旋转地安装到轴颈上的岩石切割器锥体之间。

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