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公开(公告)号：US6116355A
公开(公告)日：2000-09-12
申请号：US898055
申请日：1997-07-22
CPC分类号： E21B7/06 , E21B10/602
摘要： A choke device for controlling fluid flow, particularly in a modulated bias unit, drill bit or other item downhole drilling component, comprises a passage for the flow of fluid, a choke aperture separating an upstream portion of the passage from a downstream portion thereof, and an impingement surface located in the downstream portion of the passage opposite and spaced from the choke aperture, so that fluid flowing through the choke aperture impinges on the impingement surface. The impingement surface is formed from superhard material, such as polycrystalline diamond, and may comprise the front facing table of a two-layer polycrystalline diamond compact of the kind used as cutting elements in drag-type drill bits.
摘要翻译： 用于控制流体流动的扼流装置，特别是在调制偏压单元，钻头或其它物品井下钻井部件中的流体流动包括用于流体流动的通道，将通道的上游部分与其下游部分分开的扼流孔，以及 位于通道的与阻塞孔相对且间隔开的下游部分的冲击表面，使得流过扼流圈的流体撞击冲击表面。 冲击表面由诸如多晶金刚石的超硬材料形成，并且可以包括用作拖式钻头中的切割元件的类型的双层多晶金刚石压块的前表面。
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公开(公告)号：US5673763A
公开(公告)日：1997-10-07
申请号：US689632
申请日：1996-08-13
申请人： Richard Edward Thorp
发明人： Richard Edward Thorp
CPC分类号： E21B4/003 , E21B17/1014 , E21B7/04 , E21B7/06
摘要： A modulated bias unit, for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations, comprises a number of hydraulic actuators spaced apart around the periphery of the unit. Each actuator comprises a movable thrust member which is hydraulically displaceable outwardly and a pivotally mounted formation-engaging pad which overlies the thrust member. An inlet passage supplies fluid under pressure to the chamber, and an outlet passage delivers fluid from the chamber to a lower pressure zone. A selector control valve modulates the fluid pressure supplied to each actuator in synchronism with rotation of the drill bit so that, as the drill bit rotates, each pad is displaced outwardly at the same selected rotational position so as to bias the drill bit laterally and thus control the direction of drilling. The outlet passage from the chamber passes through the thrust member so as to wash the region where the formation-engaging pad overlies the thrust member as the fluid flows to the annulus between the unit and the borehole.
摘要翻译： 用于控制在地下地层钻孔时控制旋转钻头的钻孔方向的调制偏置单元包括围绕单元的周边间隔开的多个液压致动器。 每个致动器包括可向外液压移位的可移动推力构件和位于推力构件上的枢转地安装的地层接合垫。 入口通道在压力下向腔室供应流体，并且出口通道将流体从腔室输送到较低压力区域。 选择器控制阀与钻头的旋转同步地调节供应给每个致动器的流体压力，使得当钻头转动时，每个焊盘在相同的选定旋转位置向外移位，以便横向偏置钻头 控制钻井方向。 来自腔室的出口通道通过推力构件，以便当流体流到单元和钻孔之间的环形空间时，清洗形成接合垫覆盖推力构件的区域。
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公开(公告)号：US07178608B2
公开(公告)日：2007-02-20
申请号：US10709802
申请日：2004-05-28
CPC分类号： E21B47/00 , E21B47/01 , G01V11/002
摘要： A while drilling system and method for determining downhole parameters is provided. The system includes a retrievable while drilling tool positionable in a downhole drilling tool, a sensor chassis and at least one sensor. The while drilling tool is positionable in the downhole drilling tool and has a first communication coupler at an end thereof. The sensor chassis is supported in the drilling tool. The sensor chassis has a second communication coupler at an end thereof for operative connection with the first communication coupler. The sensor is positioned in the chassis and is adapted to measure internal and/or external parameters of the drilling tool. The sensor is operatively connected to the while drilling tool via the communication coupler for communication therebetween. The sensor may be positioned in the while drilling tool and retrievable with the drilling tool. Preferably, the system is operable in high temperature and high pressure conditions.
摘要翻译： 提供了一种用于确定井下参数的钻井系统和方法。 该系统包括可钻取的可钻取工具，其可定位在井下钻具，传感器底盘和至少一个传感器中。 同时钻孔工具可定位在井下钻具中，并且在其末端具有第一通信耦合器。 传感器底盘支撑在钻具中。 传感器底盘在其末端具有第二通信耦合器，用于与第一通信耦合器操作连接。 传感器位于底盘中，适用于测量钻具的内部和/或外部参数。 传感器通过通信耦合器可操作地连接到钻孔工具，用于在它们之间进行通信。 传感器可以定位在同时钻孔工具中，并可用钻具回收。 优选地，该系统可在高温和高压条件下操作。
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