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1. 发明授权

US4114703A Well drilling tool having sealed lubrication system 失效
标题翻译：具有密封润滑系统的钻井工具
公开(公告)号：US4114703A
公开(公告)日：1978-09-19
申请号：US849977
申请日：1977-11-09
申请人： Lawrence Wayne Matson, Jr. , Jeddy Darr Nixon, Jr. , Larry Joseph Remont
发明人： Lawrence Wayne Matson, Jr. , Jeddy Darr Nixon, Jr. , Larry Joseph Remont
IPC分类号： E21B4/00 , E21B4/02 , E21B21/10 , E21B1/06
CPC分类号： E21B4/02 , E21B21/10 , E21B4/003 , F16C33/108 , Y10S415/903
摘要： A turbo drill which is connected to a string of drill pipe as a rotating shaft for driving a drill bit which may be a rotary bit or a high speed solid head diamond bit. The turbine section has rotor and stator blades which are crescent shaped in cross section with each blade having an exit angle of 14.degree.- 23.degree. from maximum turbine efficiency. The bearing shaft is provided with chevron rotary seals positioned below the rotary bearings carrying both radial and vertical thrust. Fluid lubricant fills the space from the rotary seals to a predetermined level above the bearings. A piston seals the lubricant chamber and is pressurized by drilling fluid (i.e., mud) flowing through the tool. A layer of lubricant fluid overlies the first piston and has a second piston covering said fluid and transmitting pressure from the drilling fluid to the lubricant fluid surrounding the bearings. A plug member in the bearing shaft is positioned to be dislodged at the low lubricant position of the first piston to provide a temporary obstruction to the flow of drilling fluid to give an indication, at the well surface, of loss of lubricant in the turbo drill. An optional feature provides for increasing the pressure drop of drilling fluid in the turbo drill to cause the vertical thrust to be carried on the bottom vertical thrust bearings, after the top vertical thrust bearings are worn, and thus extend the drilling life substantially. A further optional feature is a locking ring arrangement which prevents separation of threaded connections in the drill housing during use.
摘要翻译：一种涡轮钻头，其连接到一串钻杆作为旋转轴，用于驱动可以是旋转钻头或高速实心钻头钻头的钻头。涡轮部分具有转子和定子叶片，其横截面为月牙形，每个叶片的离开角最大涡轮机效率为14°-23°。轴承轴上设有位于承载径向和垂直推力的旋转轴承下方的人字形旋转密封。流体润滑剂将旋转密封件的空间填充到轴承上方的预定水平。活塞密封润滑剂室，并通过流过工具的钻井液（即泥浆）加压。一层润滑剂流体覆盖在第一活塞上，并且具有覆盖所述流体的第二活塞并且将压力从钻井流体传递到围绕轴承的润滑剂流体。轴承轴中的塞子构件被定位成在第一活塞的低润滑剂位置移动，以向钻井流体的流动提供临时阻塞，以在井表面提供涡轮钻头中的润滑剂损失的指示。可选特征提供了在顶部垂直推力轴承磨损之后，增加涡轮钻头中的钻井液的压降以使得垂直推力承载在底部垂直推力轴承上，从而大大延长了钻井寿命。另一个可选特征是锁定环装置，其防止在使用期间分离钻孔壳体中的螺纹连接。

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