Two stage drill bit
    11.
    发明授权
    Two stage drill bit 有权
    两级钻头

    公开(公告)号:US06412579B2

    公开(公告)日:2002-07-02

    申请号:US09321362

    申请日:1999-05-27

    申请人: Coy M. Fielder

    发明人: Coy M. Fielder

    IPC分类号: E21B1026

    CPC分类号: E21B10/43 E21B10/26 E21B10/55

    摘要: A bi-center downhole drilling bit is disclosed, which bit includes a body defining proximal and distal ends, where said distal end defines a pilot and a reamer where the reamer defines a first cutting face having a selected diameter “d” and the pilot defines a second cutting face having a selected diameter less than “d”, where each the first and second cutting faces includes upsets defining proximal and distal surfaces where the distal surfaces are provided with cutting elements and the proximal surfaces are provided with one or more gauge pads.

    摘要翻译: 公开了一种双中心井下钻头,该钻头包括限定近端和远端的主体,其中所述远端限定引导件和铰刀,其中铰刀限定具有选定直径“d”的第一切削面,并且导向器限定 具有选定直径小于“d”的第二切割面,其中每个第一和第二切割面都包括限定近端表面和远侧表面的凹陷,其中远端表面设置有切割元件,并且近侧表面设置有一个或多个测量垫 。

    Bi-center bit adapted to drill casing shoe
    12.
    发明授权
    Bi-center bit adapted to drill casing shoe 有权
    双中心钻头适用于钻套管鞋

    公开(公告)号:US06340064B2

    公开(公告)日:2002-01-22

    申请号:US09392043

    申请日:1999-09-08

    IPC分类号: E21B1026

    CPC分类号: E21B10/43 E21B10/26

    摘要: A bi-center bit adapted to be consecutively used in casing and in formation without the need of removing the bit from the borehole, the bit comprising a bit body defining a proximal end adapted for connection to a drill string, a distal end and a pass-through gauge, where the distal end defines a pilot bit and an intermediate reamer section, where each the pilot and reamer section define a cutting face. A plurality of cutting or wear elements are situated on cutting blades disposed about the cutting face of the pilot and reamer sections. Cutting or wear elements are disposed on one or more of the blades which extend to or are proximate to the pass-through gauge define an angle between the line of contact on the cutting or wear element and the material to be drilled of between 5-45 degrees.

    摘要翻译: 一种双中心钻头,适于在套管和地层中连续地使用,而不需要从钻孔中移除钻头,该钻头包括限定适于连接到钻柱,近端和通道的近端的钻头体 通过量规,其中远端限定了导向钻头和中间铰刀部分,其中每个导向器和铰刀部分限定切割面。 多个切割或磨损元件位于围绕飞行员和铰刀部分的切割面设置的切割刀片上。 切割或磨损元件设置在一个或多个叶片上,其延伸到或靠近通过量规,在切割或磨损元件上的接触线与要钻探的材料之间的角度在5-45之间 度。

    Drill bit having chip breaker polycrystalline diamond compact and hard
metal insert at gauge surface
    14.
    发明授权
    Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface 失效
    钻头具有断屑器多晶金刚石紧固件和硬质金属插入件在表面

    公开(公告)号:US5449048A

    公开(公告)日:1995-09-12

    申请号:US312260

    申请日:1994-09-26

    摘要: A drag bit having a plurality of blades or ribs on its end face has one or more pockets milled into the top surfaces of said blades using a ball-nosed end mill to create a plurality of pockets, each having a spherical or a semi-spherical first end and a second end having a semicircular configuration that intersects with the leading edge face of the rib. A bullet-shaped cutting structure having a spherical first end is brazed into each of the pockets. During the manufacturing process, a pin is brazed into cooperating first and second semicircular receptacles in the spherical end of the cutter and in the semi-spherical end of the pocket, respectively, to prevent the cutter assembly from being pushed up out of the pocket during the drilling operation. In an alternative embodiment, a slot is milled into the top surface of the rib to allow use of a ball-nosed end mill having a reduced diameter shank sized to pass through the slot. In yet another embodiment, a tungsten carbide button or insert is position at the gauge diameter to reduce impact on the gauge diameter cutter in each of the ribs. Cutter assemblies are disclosed having a variety of orifices in the PDC cutter face to function as chip breakers during the drilling operation.

    摘要翻译: 具有在其端面上的多个叶片或肋的拖曳部分具有使用球形端铣刀铣削到所述刀片的顶表面中的一个或多个凹坑,以产生多个凹穴,每个凹穴具有球形或半球形 第一端和具有与肋的前缘面相交的半圆形构造的第二端。 具有球形第一端的子弹形切割结构钎焊到每个凹穴中。 在制造过程中,销钉分别钎焊到切割器的球形端部和口袋的半球形端部中的配合的第一和第二半圆形容器中,以防止刀具组件在袋中被推出口袋 钻井作业。 在替代实施例中,槽被铣削到肋的顶表面中,以允许使用具有缩小直径柄的球头端铣刀,其尺寸设计成穿过狭槽。 在另一个实施例中,碳化钨钮扣或插入件位于规格直径处,以减少每个肋中对直径切割器的冲击。 公开了在PDC切割面中具有各种孔口的切割器组件,以在钻井操作期间用作切屑断裂器。

    Expandable eccentric reamer and method of use in drilling
    15.
    发明授权
    Expandable eccentric reamer and method of use in drilling 有权
    膨胀式偏心铰刀及其在钻井中的应用

    公开(公告)号:US06991046B2

    公开(公告)日:2006-01-31

    申请号:US10701232

    申请日:2003-11-03

    IPC分类号: E21B7/28

    CPC分类号: E21B10/322

    摘要: An expandable eccentric reamer for placement in a drill string up-hole of a conventional drill bit. The reamer blade is actuated by drilling fluid pressure to radially extend to a drill out diameter greater than a pass-through diameter. The reamer body is shaped to have an eccentric outer surface configuration to accommodate the reamer blade therein. The reamer blade acts as a piston arm in response to drilling fluid pressure and moves along a shaft anchored in a hump region that forms an eccentricity in the outer surface configuration of the body. The reamer blade has an outer edge configuration that positions the cutters thereon to prevent them from engaging a casing of a well borehole upon deployment.

    摘要翻译: 一种用于放置在常规钻头的钻柱上孔中的可扩张式偏心铰刀。 钻孔刀片通过钻井液压力来致动,径向延伸到大于通过直径的钻孔直径。 铰刀体被成形为具有偏心外表面构造以容纳其中的铰刀刀片。 铰刀刀片响应于钻井液压力而作为活塞臂,并且沿着锚定在驼峰区域中的轴移动,所述隆起区域在主体的外表面构型中形成偏心。 铰刀刀片具有将切割器定位在其上的外边缘构造,以防止它们在展开时与井眼的壳体接合。

    Bi-center bit adapted to drill casing shoe
    16.
    发明授权
    Bi-center bit adapted to drill casing shoe 有权
    双中心钻头适用于钻套管鞋

    公开(公告)号:US06629476B2

    公开(公告)日:2003-10-07

    申请号:US09969444

    申请日:2001-10-02

    IPC分类号: B21K504

    CPC分类号: E21B10/43 E21B10/26

    摘要: The invention is directed to a bi-center drilling tool adapted to fit within and drill through a casing shoe without damage to the surrounding casing. In one embodiment, the tool comprises a bit body having a proximal and a distal end where the distal end defines a pilot bit and an intermediate reamer section, where each the pilot and reamer sections define a bit face including primary and secondary cutting blades and cutting elements disposed on said blades. In this embodiment, the cutting or wear elements disposed on the one or more cutting blades which extend to or are proximate to the pass-through gauge define a selected angle between the line of contact on the cutting or wear elements and the material to be drilled.

    摘要翻译: 本发明涉及一种双中心钻孔工具,其适于装配在套管内并钻孔,而不会损坏周围的套管。 在一个实施例中,工具包括具有近端和远端的钻头体,其中远端限定导向钻头和中间铰刀部分,其中每个引导螺母部分和铰刀部分限定一个钻头面,其包括主切削刀片和次切削刀片以及切削 设置在所述叶片上的元件。 在该实施例中,设置在一个或多个切割刀片上的切割或磨损元件延伸到或靠近穿通表面限定切割或磨损元件上的接触线与要钻探的材料之间的选定角度 。

    Internal fluid screen to prevent nozzle and port plugging
    18.
    发明授权
    Internal fluid screen to prevent nozzle and port plugging 失效
    内部流体屏幕防止喷嘴和端口堵塞

    公开(公告)号:US4336850A

    公开(公告)日:1982-06-29

    申请号:US186774

    申请日:1980-09-12

    申请人: Coy M. Fielder

    发明人: Coy M. Fielder

    摘要: A strainer is shown for use with a downhole tool through which drilling fluid is circulated during the drilling of deep oil wells and the like. The strainer provides a plurality of narrow slots which prevent the passage of material therethrough that might be entrained with the fluid and which otherwise would plug ports or nozzles or restrict flow passages below the strainer.

    摘要翻译: 示出了用于井下工具的过滤器,钻井液在钻井深油井等期间通过该井下工具循环。 过滤器提供多个窄槽,其防止可能与流体夹带的材料通过,否则将堵塞端口或喷嘴或限制过滤器下方的流动通道。