Modular drop-in sealed bearing assembly for downhole drilling mo

Details Modular drop-in sealed bearing assembly for downhole drilling mo Modular drop-in sealed bearing assembly for downhole drilling mo

1990-08-24

1991-09-17

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

175107, 277 3, 277 85, 384479, F16C 3376, E21B 402

Patent

active

050489810

ABSTRACT:
A sealed bearing assembly for downhole drilling motors, which has a modular drop-in type construction. The sealed bearing assembly includes a housing portion which is secured to the drilling shaft and a housing portion which is secured to the casing. A bearing assembly extends between the two housing portions and the housing portions encase the bearing assembly and include a sealed construction which prevents the entry of drilling mud into the sealed assembly. A number of flow passages are provided in the rotating housing portion and/or the stationary housing portion so as to allow fluid to freely pass the sealed bearing assembly such that there is a negligible pressure drop across the sealed bearing assembly. The assembly also includes sealing portions on either side of the bearing assembly which preclude the entry of mud into the sealed bearing assembly. The sealing portions include a reservoir for pressurizing lubricating oil to at least the pressure of the drilling mud and causing the pressurized oil to lubricate the bearing and other components such as a mechanical face seal and then to provide a pressure to the inner end of a backup seal at either end of the assembly so as to prevent the flow of pressurized mud across the backup seal.

REFERENCES:
patent: 3666333 (1972-05-01), Dicky
patent: 3866988 (1975-02-01), Striegler
patent: 4114703 (1978-09-01), Matson, Jr. et al.
patent: 4284149 (1981-08-01), Fox
patent: 4320929 (1982-03-01), Clark et al.
patent: 4476944 (1984-10-01), Beimgraben
patent: 4577704 (1986-03-01), Aumann
patent: 4593774 (1986-06-01), Lingafellow
patent: 4665997 (1987-05-01), Maurer et al.

Affiliated with

Also associated with

Rating

Modular drop-in sealed bearing assembly for downhole drilling mo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Modular drop-in sealed bearing assembly for downhole drilling mo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modular drop-in sealed bearing assembly for downhole drilling mo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1912721