Patents-Review.com
ClassID:

135217 ⎘

E21B10/23 - CPC Classification

Classification description:

Drill bits; Roller bits characterised by bearing, lubrication or sealing details with drilling fluid supply to the bearings

Recent Application in this class:
#1
20250215751
2025-07-03

BEARING ASSEMBLY WITH FLOW RESTRICTOR FOR A DUAL ROD DIRECTIONAL DRILLING APPARATUS AND METHOD OF USE

 #2
20240229571
2024-07-11

SHANK ADAPTER, ROCK DRILLING MACHINE AND METHOD

 #3
20240133247
2024-04-25

SHANK ADAPTER, ROCK DRILLING MACHINE AND METHOD

 #4
20200291725
2020-09-17

Floating Plug Anti-Leak

 #5
20190218861
2019-07-18

Coated surfaces for bearings used in drilling motors

 #6
20190203536
2019-07-04

Bearing assembly for drilling a subterranean formation

 #7
20180298696
2018-10-18

HOLE FORMING TOOL WITH AT LEAST ONE ROTATABLE CUTTING MEMBER

 #8
20180044993
2018-02-15

Durable rock bit for blast hole drilling

 #9
20170254152
2017-09-07

By-pass fluid passageway for drill tool

 #10
20170254151
2017-09-07

Semi-sealed rotary drill tool

 #11
20160160569
2016-06-09

Rotary drill bit air/water separator

 #12
20150322724
2015-11-12

Rotary drill bit

 #13
20140301679
2014-10-09

Downhole tools including bearings and methods of forming same

 #14
20130020135
2013-01-24

Rock bit having a labyrinth seal/bearing protection structure

 #15
20120080230
2012-04-05

Bearings for downhole tools, downhole tools incorporating such bearings, and methods of cooling such bearings

 #16
20110024198
2011-02-03

BEARING SYSTEMS CONTAINING DIAMOND ENHANCED MATERIALS AND DOWNHOLE APPLICATIONS FOR SAME

 #17
20100284636
2010-11-11

Air circulation ports in rotary rock bit journal bearing

 #18
20090236147
2009-09-24

Lubricated Diamond Bearing Drill Bit

 #19
20080099246
2008-05-01

Using hydrostatic bearings for downhole applications

 #20
20080041633
2008-02-21

EARTH BIT HAVING A SCREEN

 #21
20070000698
2007-01-04

Graded hardfacing for drill bits