E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 4/02 (2006.01)
Patent
CA 2280481
A downhole oil-sealed bearing pack assembly is provided for protecting bearing elements and seals. The bearing pack assembly includes a non-contact flow restrictor for reducing large differential pressures across sealing elements. The non-contact flow restrictor includes an inner restrictive element attached to a rotatable drive shaft and an outer restrictive element secured to a stationary bearing housing. The inner restrictive element can include an outwardly extending ring adjacent to a first land and the outer restrictive element can include an inwardly extending ring adjacent to a second land. During rotation of the drive shaft the inwardly and outwardly extending rings remain a distance from the second and first lands, respectively, thus permitting a fluid to traverse the rings and lands. The invention also provides a wear sleeve for increasing seal and shaft life. The wear sleeve includes a groove cut into a hollow sleeve which is secured to the rotatable driveshaft. A cooling fluid within the groove dissipates heat generated by seals contacting the wear sleeve on the rotating shaft. Further, a piston and dipstick assembly is provided for supplying oil to bearing elements and for measuring oil within a reservoir. The piston and dipstick assembly includes a chamber for containing oil and a drilling fluid. A floating piston applies pressure to the oil in the chamber and prevents the drilling fluid from mixing with the oil. A conduit extending into the chamber permits a dipstick to measure the location of the piston within the chamber to determine the amount of oil remaining within the chamber.
Bico Drilling Tools Inc.
Kirby Eades Gale Baker
LandOfFree
Downhole oil-sealed bearing pack assembly 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 oil-sealed bearing pack assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downhole oil-sealed bearing pack assembly will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1918520