Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent
1985-10-25
1987-08-04
Novosad, Stephen J.
Boring or penetrating the earth
With below-ground tool drive prime mover
Fluid rotary type
E21B 414
Patent
active
046839640
ABSTRACT:
A downhole drill bit drive apparatus comprises a tubular housing adapted to be secured to the downhole end of a drill string, a mandrel concentrically disposed within the housing and having one end adapted to be secured to a downhole rotary drive and an other end adapted to be secured to a drill bit, the housing and the mandrel defining a fluid flow passage for transmitting drilling fluid to a drill bit secured to the mandrel, bearing assembly disposed between the housing and the mandrel for permitting rotation of the mandrel within the housing and transmitting axial and radial loads between the housing and the mandrel, a first seal at one end of the bearing assembly defining one end of a bearing chamber for housing the bearing assembly and a lubricating fluid for lubricating the bearing assembly and being operable to seal the chamber from the fluid flow passage and maintain the pressure in the flow passage and in the chamber substantially at equilibrium, and a second seal at the other end of the bearing assembly defining the other end of the bearing chamber and being operable to seal the chamber from the exterior of the housing.
REFERENCES:
patent: 3232362 (1966-02-01), Cullen et al.
patent: 3587348 (1971-06-01), Popa et al.
patent: 3669199 (1972-06-01), Cullen et al.
patent: 3894818 (1975-07-01), Tschirky
patent: 4090574 (1978-05-01), Garrison
patent: 4108023 (1978-08-01), Garrison
patent: 4114703 (1978-09-01), Matson, Jr. et al.
patent: 4170441 (1979-10-01), Trzeciak
patent: 4222445 (1980-09-01), Vedetsky et al.
patent: 4254669 (1981-03-01), Schultz
patent: 4295535 (1981-10-01), Crase et al.
patent: 4314615 (1982-02-01), Sodder, Jr. et al.
patent: 4329127 (1982-05-01), Tschirky et al.
"Machinoexport" brochure, Stan-Canada, Inc.
Baker Service Tools, Brochure.
"INA-Walzlager, Einbaubeispiele Fur" INA brochure.
Bui Thuy M.
Maxi-Torque Drill Systems, Inc.
Novosad Stephen J.
LandOfFree
Downhole drill bit drive apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Downhole drill bit drive apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downhole drill bit drive apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-878956