US 11,655,679 B2
Downhole drilling tool with a polycrystalline diamond bearing
Gregory Prevost, Spring, TX (US); Michael V. Williams, Conroe, TX (US); Edward C. Spatz, Spring, TX (US); Michael R. Reese, Houston, TX (US); William W. King, Houston, TX (US); and David P. Miess, Magnolia, TX (US)
Assigned to XR Reserve LLC, Houston, TX (US)
Filed by XR Downhole, LLC, Houston, TX (US)
Filed on Nov. 3, 2021, as Appl. No. 17/518,315.
Application 17/518,315 is a continuation of application No. 16/561,335, filed on Sep. 5, 2019, granted, now 11,187,040.
Application 16/561,335 is a continuation in part of application No. 16/049,608, filed on Jul. 30, 2018, granted, now 10,738,821, issued on Aug. 11, 2020.
Prior Publication US 2022/0170322 A1, Jun. 2, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 4/00 (2006.01); E21B 10/573 (2006.01)
CPC E21B 4/003 (2013.01) [E21B 10/573 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A downhole tool, the downhole tool comprising:
a bearing housing;
a drive shaft coupled with the bearing housing, wherein one of the bearing housing and the drive shaft comprises a metal bearing surface, the metal bearing surface comprising a metal that contains at least 2 weight percent of iron, cobalt, nickel, ruthenium, rhodium, palladium, chromium, manganese, copper, titanium, tantalum, or combinations thereof based on a total weight of the metal; and
a polycrystalline diamond bearing element having a diamond bearing surface, wherein the polycrystalline diamond bearing element is positioned relative to the bearing housing and the drive shaft such that the diamond bearing surface is engaged with the metal bearing surface.