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6 条记录 (耗时 0.029 秒)

    Rock bit
    3.
    发明授权
    Rock bit 失效
    摇滚点

    公开(公告)号：US5485890A

    公开(公告)日：1996-01-23

    申请号：US416484

    申请日：1995-04-04

    申请人： Chris E. Cawthorne ,  Steve Peterson ,  Naresh J. Kar ,  Madapusi K. Keshavan

    发明人： Chris E. Cawthorne ,  Steve Peterson ,  Naresh J. Kar ,  Madapusi K. Keshavan

    IPC分类号： E21B10/22 ,  E21B10/25

    CPC分类号： E21B10/25

    摘要： A rock bit for drilling subterranean formations has an improved dynamic O-ring seal for retaining lubricant around the rock bit bearings during operation of the rock bit. Such a bit has a plurality of journal pins, each having a bearing surface, and a cutter cone mounted on each journal pin and including a bearing surface. A grease reservoir is in communication with such bearing surfaces for maintaining grease adjacent to the bearing surfaces. The grease is sealed in with dynamic O-ring seals rotating against a sealing surface with a Vickers hardness of at least 1000 and vibratory burnished to have a surface finish in the range of from 5 to 32 microinches AA. Preferably, the sealing surface is formed on a seal ring interposed between the cone and journal. Preferably the sealing surface comprises a tungsten carbide composite sprayed onto the outside surface of a steel ring which is then welded to a journal.

    摘要翻译： 用于钻井地层的岩石钻头具有改进的动态O形密封圈，用于在岩石钻头操作期间将润滑剂保持在岩石钻头轴承周围。 这种钻头具有多个轴颈销，每个轴承销均具有一个支承表面，以及一个安装在每个轴销上并包括轴承表面的切割锥。 润滑脂储存器与这种支承表面连通，用于保持与轴承表面相邻的润滑脂。 润滑脂被密封，动态O型圈密封件旋转抵抗密封表面，维氏硬度至少为1000，振动磨光，表面光洁度为5至32微英寸AA。 优选地，密封表面形成在插入锥体和轴颈之间的密封环上。 优选地，密封表面包括喷涂在钢环的外表面上的碳化钨复合材料，然后焊接到轴颈上。

    Rock bit insert
    4.
    发明授权
    Rock bit insert 失效
    岩石钻头插入

    公开(公告)号：US4869329A

    公开(公告)日：1989-09-26

    申请号：US239162

    申请日：1988-08-31

    申请人： Naresh J. Kar ,  Thomas W. Oldham

    发明人： Naresh J. Kar ,  Thomas W. Oldham

    IPC分类号： B22F3/24 ,  B23P15/28 ,  E21B10/52 ,  E21B10/56

    CPC分类号： E21B10/56 ,  B22F3/24 ,  B23P15/28 ,  E21B10/52

    摘要： A new and improved tungsten carbide insert for rock bits is disclosed, in which the inserts are subject to extended vibratory tumbling in order to increase their fracture toughness. More specifically the vibratory finishing or tumbling of the inserts has been increased from a typical time of 30-60 minutes to time periods of at least 90 minutes and preferably a minimum of 225 minutes. A marked improvement in toughness is obtained by this process because the size and distribution of surface flaws of the inserts were greatly reduced, and because the surface hardness of the inserts was increased, thereby resulting in an increase in the stress required to cause fracture, and a consequent increase in resistance to breakage.

    摘要翻译： 公开了一种新的改进的用于岩屑的碳化钨刀片，其中为了增加其断裂韧性，插入件经受延长的振动翻滚。 更具体地，插入物的振动整理或翻转已经从30-60分钟的典型时间增加到至少90分钟的时间段，优选地最小为225分钟。 通过该方法可以获得韧性的明显改善，因为刀片的表面缺陷的尺寸和分布大大降低，并且由于刀片的表面硬度增加，从而导致引起断裂所需的应力增加， 随之而来的耐破裂性增加。

    Cast steel rock bit cutter cones having metallurgically bonded cutter inserts
    5.
    发明授权
    Cast steel rock bit cutter cones having metallurgically bonded cutter inserts 失效
    铸钢钻头切割锥具有冶金结合的切削刀片

    公开(公告)号：US4907665A

    公开(公告)日：1990-03-13

    申请号：US297504

    申请日：1989-01-13

    申请人： Naresh J. Kar ,  William J. Salesky ,  Steven J. Guzowski

    发明人： Naresh J. Kar ,  William J. Salesky ,  Steven J. Guzowski

    IPC分类号： B22D19/06 ,  E21B10/52

    CPC分类号： B22D19/06 ,  E21B10/52

    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 bonding and embedding the inserts to the steel matrix.

    摘要翻译： 公开了包括在中间层中的“硬”金属陶瓷切割刀片或合适的高熔点金属的涂层并嵌入到铸钢基体中的工具，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适当的位置在合适的模具中，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钢中而导致的金属陶瓷的劣化，并且将插入件冶金结合并嵌入到钢基体中。