JOSEPH A DOWNIE
Engineers in West Aliquippa, PA
License number
Pennsylvania PE020014E
Category
Engineers
Type
Professional Engineer
Address
Address
West Aliquippa, PA 15001
Professional information
Spherical Plain Bearing
US Patent:
5716143, Feb 10, 1998
Filed:
Jul 12, 1995
Appl. No.:
8/501965
Inventors:
Timothy M. Browne - Aspinwall PA
Jeffrey C. Badac - New Kensington PA
J. David Scott - Pittsburgh PA
Robert M. Suchevich - Lower Burrell PA
Joseph A. Downie - Aliquippa PA
Jeffrey C. Badac - New Kensington PA
J. David Scott - Pittsburgh PA
Robert M. Suchevich - Lower Burrell PA
Joseph A. Downie - Aliquippa PA
Assignee:
Allegheny Ludlum Corporation - Pittsburgh PA
International Classification:
F16C 2304, F16C 3322
US Classification:
384192
Abstract:
A spherical plain bearing is provided having improved wear resistance under heavy axial and radial loads of a rotating shaft. The bearing includes a pillow block having a concave inner surface, a split cylindrical protective sleeve for mating with and detachably clamping around the shaft, the outer surface of the sleeve having a peripheral recess. The bearing includes a split cylindrical liner having an inner wear resistant surface for sliding contact within the recess of the protective sleeve, and multiple thrust plate rings, and a split cylindrical cartridge for holding the liner in the recess of the protective sleeve. The bearing includes a plurality of high wear-resistant elements for providing high wear resistance and low friction resistance when placed into the wear surfaces of the bearing.
Replaceable Wear Band For Well Drill Pipe
US Patent:
8397840, Mar 19, 2013
Filed:
Feb 1, 2012
Appl. No.:
13/363416
Inventors:
Joseph A. Downie - Aliquippa PA, US
Bruce M. Warnes - Beaver PA, US
Bruce M. Warnes - Beaver PA, US
Assignee:
Reusable Wearbands, LLC - Beaver PA
International Classification:
E21B 17/10
US Classification:
1753255, 1662426, 285223
Abstract:
A wear band for a well drill pipe which is made up of a coil spring sized to fit at the joint of the well drill pipe or casing. The inner surface of the coil spring includes a textured coating such as a carbide. The outer surface includes a plurality of hydrodynamic dimples defined therein, and preferably both the outer surface and the inner surface are adapted to resist corrosion. The abrasive coating preferably consists essentially of 95% tungsten carbide and a binder of 5% cobalt and coats an amount of the inner surface in the range of 50% to 100%. The hydrodynamic dimples are generally tear drop in shape to act as miniature fluid pumps. As a result, the wear band can be mechanically attached to the drill pipe while eliminating the need for metallurgically-welded hardbands and therefore unaffecting the drill pipe properties and dimensions.