04560014 is referenced by 266 patents and cites 18 patents.

A bidirectional thrust bearing assembly is used between a downhole fluid motor and a rock bit for drilling oil wells. The bearing assembly has a stationary housing with radial journal bearing sleeves and a rotatable drive shaft also having radial bearing sleeves. A pair of oppositely facing thrust bearing rings are mounted in the housing. A second pair of thrust bearing rings are mounted on the shaft so as to have faces opposing the bearing faces on the first pair of rings. Belleville springs resiliently bias a pair of the thrust bearing rings apart and carry the thrust load between such rings. Each ring has a plurality of inserts of hard material, preferably polycrystalline diamond, at the bearing surface. Means are provided for circulating drilling fluid from the motor through the thrust bearing faces for forming hydrodynamic fluid bearing films in the bearing interfaces.

Title
Thrust bearing assembly for a downhole drill motor
Application Number
6/365614
Publication Number
4560014
Application Date
April 5, 1982
Publication Date
December 24, 1985
Inventor
Bela A Geczy
Orange
CA, US
Agent
Price Gess & Ubell
Assignee
Smith International
CA, US
IPC
E21B 4/02
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