• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A sealing system acts as a barrier to the drilling fluid, pulverized cuttings and other materials in the borehole to prevent the materials from entering the bearing area of a rotary rock bit. The bit body and the base of the cone cutter cooperate to retain the seal unit. The seal is located in a groove and an effective seal is provided without reducing the bearing capacity of the bit's bearing system. The sealing system allows excessive pressures in the lubricant to be relieved.
    公开号:SU731910A3
    申请号:SU772507503
    申请日:1977-07-28
    公开日:1980-04-30
    发明作者:Ф. Уолтерс Д.
    申请人:Дрессер Индастриз Инк (Фирма)；
    IPC主号:
    专利说明:

    (54) DRILLING BIT
    one
    The invention relates to roller cone bits, in particular to means for sealing the main bearings of the bit.
    Known seal, stirring in the groove of the wedge-shaped profile 1.5
    However, such a seal cannot reliably operate under pressure pulsation conditions in a pressurized system.
    It is also known a drill bit containing a body with a paw, a trunnion, a roller cutter, Ø mounted on a trunnion with the possibility of vras, a circular O-ring placed in a groove made in the back of the roller cutter and having on the side wall furthest from the 15th pin axis cylindrical surface
    2
    A disadvantage of the known bit is the fixed fastening of the seal in the groove, which reduces the reliability of its operation 20 in difficult well conditions.
    The aim of the invention is to improve the reliability of the seal.
    The goal is achieved by the fact that the side wall of the groove, close to the axis of the trunnion, is made in the form of a conical surface, and the width of the groove increases towards the rear of the roller cutter.
    FIG. 1 shows one of the sections of the drill bit, a longitudinal section; in fig. 2 - seal placement unit.
    The drill bit includes a housing 1 with a paw 2, a trunnion 3, a roller cutter 4 mounted on the trunnion 3 rotatably by means of bearings 5, 6, 7 and 8. The seal 9 is in the form of an o-ring placed in a groove made in the back of the cone. The side wall of the groove furthest from the axle axis has a cylindrical surface 10, and the groove wall close to the axle axis is made in the form of a conical surface 11, the groove widening to the back of the roller cutter.
    When the bit operates, the pressure of the flushing fluid displaces the seal 9 into a wedge formed by the conical surface 11 of the roller cutter 4 and the surface 12 of the foot 2. The lubricant pressure in the lubrication system of the bit tends to displace the seal 9 to the cylindrical surface 10, allowing some lubricant to leak out of the cavity support and reduce its pressure.
    Thus, pressure in the cavity of the bit support is equalized with
    hydrostatic pressure of drilling fluid in the well, which contributes to improving the reliability of the sealing system and increasing the durability of the bit.
    权利要求:
    Claims (2)
    [1]
    1. Makarov V. G. Sealing devices. L., “Mechanical Engineering, 1973, p. 17
    [2]
    2. US patent number 3127942, cl. 308-8.2, pub. 04/07/64 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU731910A3|1980-04-30|Drill bit
    US4183416A|1980-01-15|Cutter actuated rock bit lubrication system
    US4428687A|1984-01-31|Floating seal for earth boring bit
    US4386667A|1983-06-07|Plunger lubricant compensator for an earth boring drill bit
    US4167219A|1979-09-11|Viscous pump rock bit lubrication system
    US3844364A|1974-10-29|Hydrostatic rock bit lubrication system
    US2187037A|1940-01-16|Well tool or the like
    US4825964A|1989-05-02|Arrangement for reducing seal damage between rotatable and stationary members
    US4181185A|1980-01-01|Thrust flange actuated rock bit lubrication system
    US3721306A|1973-03-20|Pressure equalizing system for rock bits
    AU616930B2|1991-11-14|A self-controlling drill rod
    US3739864A|1973-06-19|Pressure equalizing system for rock bits
    US3841422A|1974-10-15|Dynamic rock bit lubrication system
    US3735825A|1973-05-29|Pressure equalizing system for rock bits
    US4262759A|1981-04-21|Combination seal and pressure relief valve for sealed drill string unit
    RU2105122C1|1998-02-20|Above-bit roller-cutter underreamer
    US5520257A|1996-05-28|Bit with ball plug compensator having pressure relief means
    US3744580A|1973-07-10|Lubricant reservoir for rock bits
    SU825831A1|1981-04-30|Drilling rotary bit
    SU1687761A1|1991-10-30|Rolling cutter bit
    RU2014432C1|1994-06-15|Wellhead sealing device
    SU1615311A1|1990-12-23|Sealed support of cone drill bit
    SU1609936A1|1990-11-30|Borehole reamer
    GB2034786A|1980-06-11|Earth boring bit
    US451292A|1891-04-28|Drill-bit
    同族专利:
    公开号 | 公开日
    FR2369413A1|1978-05-26|
    CA1064013A|1979-10-09|
    DE2743688A1|1978-05-03|
    IT1084098B|1985-05-25|
    GB1563751A|1980-04-02|
    US4073548A|1978-02-14|
    SE7707473L|1978-05-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2754252C2|2016-11-09|2021-08-31|Варел Интернэшнл Инд., Л.П.|Chisel with conical cutters, which has oil seal for complete fixation of seal|US3761145A|1972-03-06|1973-09-25|Murphy Ind Inc G|Seal means for drill bit bearings|
    US3735825A|1972-03-07|1973-05-29|Dresser Ind|Pressure equalizing system for rock bits|
    US3944306A|1974-12-16|1976-03-16|Smith International, Inc.|Rock bit bearing seal|US4199856A|1978-07-31|1980-04-29|Dresser Industries, Inc.|Method of providing lubricant volume displacement system for a rotary rock bit|
    US4253710A|1979-10-09|1981-03-03|Dresser Industries, Inc.|High temperature sealing system for a rotary rock bit|
    US4727942A|1986-11-05|1988-03-01|Hughes Tool Company|Compensator for earth boring bits|
    US5027911A|1989-11-02|1991-07-02|Dresser Industries, Inc.|Double seal with lubricant gap between seals for sealed rotary drill bits|
    US5141340A|1989-12-18|1992-08-25|Tonder Frederik S Van|Roller bearing|
    CA2009987A1|1990-02-14|1991-08-14|Kenneth M. White|Journal bearing type rock bit|
    US5513715A|1994-08-31|1996-05-07|Dresser Industries, Inc.|Flat seal for a roller cone rock bit|
    US5513711A|1994-08-31|1996-05-07|Williams; Mark E.|Sealed and lubricated rotary cone drill bit having improved seal protection|
    US5441120A|1994-08-31|1995-08-15|Dresser Industries, Inc.|Roller cone rock bit having a sealing system with double elastomer seals|
    US5636700A|1995-01-03|1997-06-10|Dresser Industries, Inc.|Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction|
    JP3006537B2|1996-05-17|2000-02-07|トヨタ自動車株式会社|Seal structure between rotating member and fixed member|
    US6279671B1|1999-03-01|2001-08-28|Amiya K. Panigrahi|Roller cone bit with improved seal gland design|
    GB2374638B|2001-04-17|2004-10-06|Rolls Royce Plc|Bearing assembly|
    US6698536B2|2001-10-01|2004-03-02|Smith International, Inc.|Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system|
    US7036613B2|2003-09-12|2006-05-02|Reedhycalog, L.P.|Lip seal for roller cone drill bit|
    US7721827B2|2007-08-17|2010-05-25|Varel International Ind., L.P.|Rock bit having a seal gland with a conical sealing surface|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/737,634|US4073548A|1976-11-01|1976-11-01|Sealing system for a rotary rock bit|
    [返回顶部]