Patents-Review.com
ClassID:

135214 ⎘

E21B10/20 - CPC Classification

Classification description:

Drill bits; Roller bits characterised by detachable or adjustable parts, e.g. legs or axles

Recent Application in this class:
#1
20240003192
2024-01-04

Continuous Sampling Drill Bit

 #2
20220290501
2022-09-15

Continuous sampling drill bit

 #3
20220220807
2022-07-14

Hybrid bit

 #4
20210348452
2021-11-11

Drill coupler for mitigating torsional vibration

 #5
20210079732
2021-03-18

Hybrid Drill Bit with Axially Adjustable Counter-Rotation Cutters in Center

 #6
20210079731
2021-03-18

Hybrid drill bit with axially adjustable counter-rotation cutters in center

 #7
20210054695
2021-02-25

Continuous sampling drill bit

 #8
20200386056
2020-12-10

Method of manufacturing and designing a hybrid drill bit

 #9
20200378190
2020-12-03

Compliant rolling element retainer

 #10
20200291724
2020-09-17

Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto

 #11
20200270952
2020-08-27

Tapered joint for securing cone arm in hole opener

 #12
20200208472
2020-07-02

STEERABLE DOWNHOLE DRILLING TOOL

 #13
20200165876
2020-05-28

Drill bit with adjustable inner gauge configuration

 #14
20200095831
2020-03-26

CONFIGURABLE OVOID UNITS INCLUDING ADJUSTABLE OVOIDS, EARTH-BORING TOOLS INCLUDING THE SAME, AND RELATED METHODS

 #15
20190242188
2019-08-08

Anti-rotation pads with flow ports

 #16
20190136634
2019-05-09

RETRACTABLE DRILL HEAD

 #17
20190032693
2019-01-31

Expansion Anchor Setting Tool

 #18
20190003259
2019-01-03

Hybrid drill bit with axially adjustable counter rotation cutters in center

 #19
20180340375
2018-11-29

Earth-boring tools including polymer matrix composite hardfacing material and related methods

 #20
20180266184
2018-09-20

EARTH-BORING ROTARY TOOLS HAVING FIXED BLADES AND ROLLING CUTTER LEGS, AND METHODS OF FORMING SAME

 #21
20180179826
2018-06-28

Earth-boring tools including passively adjustable, aggressiveness-modifying members and related methods

 #22
20180087323
2018-03-29

Indexing drill bit

 #23
20170342776
2017-11-30

Retractable auger head

 #24
20170328135
2017-11-16

Roller cone drill bit with improved erosion resistance

 #25
20170198742
2017-07-13

Downhole tools including fastening assemblies, and related methods

 #26
20170175455
2017-06-22

Earth-boring tools including passively adjustable, aggressiveness-modifying members and related methods

 #27
20170167201
2017-06-15

Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto

 #28
20170122105
2017-05-04

Cutter assembly with inline mounting

 #29
20160290053
2016-10-06

Intergland grease

 #30
20160273358
2016-09-22

Cutter holder for a tunnel boring machine and an associated cutting set

 #31
20160237753
2016-08-18

Drill bit arm pocket

 #32
20160230468
2016-08-11

Earth-boring rotary tools having fixed blades and rolling cutter legs, and methods of forming same

 #33
20150337603
2015-11-26

Hybrid bit with mechanically attached roller cone elements

 #34
20150322723
2015-11-12

Hard-rock core barrel roller cutter assembly

 #35
20150285003
2015-10-08

External, divorced PDC bearing assemblies for hybrid drill bits

 #36
20150197992
2015-07-16

System and method for leg retention on hybrid bits

 #37
20150152687
2015-06-04

Hybrid drill bit having increased service life

 #38
20150028657
2015-01-29

CUTTER FOR SHAFT AND/OR TUNNEL BORING

 #39
20140338984
2014-11-20

Hole opener bearing arrangement

 #40
20140216824
2014-08-07

TOOL HOLDER, AND CHISEL SUPPORT AND DRILLING BIT FOR A DRILL HEAD

 #41
20130126247
2013-05-23

Composite drill bit

 #42
20130045055
2013-02-21

Method for replacing a tunnel boring machine roller cutter, handling device and roller cutter suited to such a method

 #43
20120205160
2012-08-16

SYSTEM AND METHOD FOR LEG RETENTION ON HYBRID BITS

 #44
20110162893
2011-07-07

High-shear roller cone and PDC hybrid bit

 #45
20110079444
2011-04-07

External, divorced PDC bearing assemblies for hybrid drill bits

 #46
20110023663
2011-02-03

Manufacturing methods for high shear roller cone bits

 #47
20100270085
2010-10-28

Adaptive control concept for hybrid PDC/roller cone bits

 #48
20100071962
2010-03-25

Drill bit with adjustable steering pads

 #49
20100071959
2010-03-25

Threaded cone retention system for roller cone bits

 #50
20080041633
2008-02-21

EARTH BIT HAVING A SCREEN

 #51
20080041632
2008-02-21

EARTH BIT HAVING A RETAINING RING

 #52
20070251730
2007-11-01

Collapsible rock head

 #53
20070017709
2007-01-25

Split cone bit

 #54
20070014495
2007-01-18

System, method, and apparatus for reducing residual stress in as-welded roller cone bit ball plug welds

 #55
16544333
2020-04-21

Continuous sampling drill bit