Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Including member deformable by relative movement between shafts
Patent
1991-10-23
1994-12-13
Stodola, Daniel P.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Flexible coupling between fluid-conducting rotary shafts
Including member deformable by relative movement between shafts
464 76, 464 83, F16D 368
Patent
active
053725484
ABSTRACT:
A longitudinal and rotary vibration dampener or shock absorber for rotary and percussion drill bits comprises a resilient element to absorb axial compression loads, preferably in a compression mode; a resilient element to absorb axial tension loads, preferably in a compression mode; resilient elements to absorb torque loads in clockwise and counterclockwise directions preferably in a compression mode; radial guide surfaces for long wear between the driver and the driven members and preferably spaced apart axially to resist bending couple loads applied across the two members during operation; and a seal and surface to allow passage of air or other fluid through the unit during operation. All resilient elements, guide members, and seals are readily replaceable in the field. The unit is structurally sound and enclosed and is attachable to the drilling rig drive head and drill pipe or to the drill pipe and bit as the case may be. A preferred embodiment has a drive shaft and a driven shaft interconnected by separate longitudinal and torque load absorbing members, one shaft having internal drive plates or splines fitting inside cavities on the other and separate elastomeric shock absorbing members absorbing rotary torque and extension shock loads. An elastomeric shock absorbing member positioned in a cavity between the shafts absorbs longitudinal compressive shock loads.
REFERENCES:
patent: 1671436 (1928-05-01), Melott
patent: 3183684 (1965-05-01), Zeidler
patent: 3746330 (1973-07-01), Taciuk
patent: 3779040 (1973-12-01), Garrett
patent: 4139994 (1979-02-01), Alther
patent: 4571215 (1986-02-01), Hansen
patent: 4627885 (1986-12-01), Arlt
Mosely Neal J.
Stodola Daniel P.
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