ClassID:

135225

E21B10/32 - CPC Classification

Classification description:

Drill bits; Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools

Sub-classes:
Recent Application in this class:
#1
20260153002
2026-06-04

BRAKE AND WEAR INDICATOR FOR EXPANDABLE DOWNHOLE TOOL

#2
20260125952
2026-05-07

DEVICE AND ITS APPLICATION METHOD FOR IN-SITU CUTTING SOIL IN BOREHOLE

#3
20260035873
2026-02-05

Post Hole Belling Auger

#4
20260015911
2026-01-15

WELLBORE DRILL BIT WITH STATIONARY AND EXPANDABLE BLADES

#5
20250250881
2025-08-07

DRILLING HEAD ASSEMBLY WITH LATCHING SYSTEM AND FLUID RETENTION MECHANISM

#6
20250250866
2025-08-07

DRILLING HEAD ASSEMBLY WITH LATCHING SYSTEM AND FLUID RETENTION MECHANISM

#7
20250230714
2025-07-17

BRAKE AND WEAR INDICATOR FOR EXPANDABLE DOWNHOLE TOOL

#8
20250172062
2025-05-29

COAL MINING SYSTEM AND METHOD OF DUAL CIRCULATION DRILLING WITH MECHANICAL REAMING AND ABRASIVE JET

#9
20240384603
2024-11-21

Wellbore Notching Assembly

#10
20240368946
2024-11-07

REAMERS WITH IMPROVED DURABILITY AND/OR STABILITY

#11
20240337161
2024-10-10

METHOD AND SYSTEM FOR MINING

#12
20240255675
2024-08-01

In-situ shear test device for holes in rock-soil mass

#13
20240191578
2024-06-13

Post Hole Belling Auger

#14
20240068300
2024-02-29

Devices, systems, and methods for expandable block sets

#15
20240052706
2024-02-15

Multi-activation reamer with activation confirmation

#16
20230113994
2023-04-13

Casing mill, method, and system

#17
20230109781
2023-04-13

CASING MILL, METHOD, AND SYSTEM

#18
20230044315
2023-02-09

Drilling system and method of using same

#19
20220412169
2022-12-29

Hybrid bit including earth boring and percussion elements for drilling earth formations

#20
20220397028
2022-12-15

Intelligent circulating sub for rotary/sliding drilling system and method

#21
20220178246
2022-06-09

Instrumented cutter

#22
20220154567
2022-05-19

Method and system for mining

#23
20220049558
2022-02-17

REDUCED DIFFERENTIAL STICKING DRILLING COLLAR

#24
20220049556
2022-02-17

Post hole belling auger

#25
20220016721
2022-01-20

DIAMETER-ENLARGED HOLE PORTION FORMING DEVICE

#26
20210310313
2021-10-07

DRILL STRING

#27
20210301605
2021-09-30

Deploying material to limit losses of drilling fluid in a wellbore

#28
20210301597
2021-09-30

Deploying material to limit losses of drilling fluid in a wellbore

#29
20210207440
2021-07-08

Point-the-bit bottom hole assembly with reamer

#30
20210198952
2021-07-01

Expandable cutting tool

#31
20210198951
2021-07-01

Reamer block with cutter pocket holders

#32
20210140244
2021-05-13

Combined crushing super-variable-diameter drill bit for natural gas hydrate exploitation

#33
20210131191
2021-05-06

Drilling system and method of using same

#34
20210108466
2021-04-15

Drilling bottom hole methods for loss circulation mitigation

#35
20210087887
2021-03-25

Underground reamer

#36
20200392829
2020-12-17

Marking and sensing a borehole wall

#37
20200340335
2020-10-29

System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity

#38
20200340333
2020-10-29

Method of extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity

#39
20200325762
2020-10-15

Intelligent reamer for rotary/sliding drilling system and method

#40
20200308955
2020-10-01

Instrumented rotary tool with compliant connecting portions

#41
20200277824
2020-09-03

Hybrid bit including earth-boring and percussion elements for drilling earth formations

#42
20200217158
2020-07-09

Cutting tool with pivotally fixed cutters

#43
20190368274
2019-12-05

Downhole apparatus and method of use

#44
20190292897
2019-09-26

Supporting a string within a wellbore with a smart stabilizer

#45
20190292853
2019-09-26

Borehole cross-section steering

#46
20190195021
2019-06-27

Hydraulic motor for a drilling system

#47
20190169945
2019-06-06

Sensor activated downhole cutting tool

#48
20190160707
2019-05-30

Hole drilling device for forming expanded-diameter hole portion

#49
20190153782
2019-05-23

Drilling tool with near-bit electronics

#50
20190145176
2019-05-16

Spline insert for a downhole tool

#51
20190136685
2019-05-09

Methods and systems for detecting relative positions of downhole elements in downhole operations

#52
20190128072
2019-05-02

Metal matrix composite material for additive manufacturing of downhole tools

#53
20190106957
2019-04-11

SINGLE-TRIP CASING CUTTING AND BRIDGE PLUG SETTING

#54
20190055785
2019-02-21

Method of drilling with an extensible pad

#55
20190040730
2019-02-07

Adjustable Cutting Mill Assembly and Methods of Operation

#56
20190003260
2019-01-03

Extendable cutting tools for use in a wellbore

#57
20180334857
2018-11-22

Expandable downhole tool assemblies, bottom-hole assemblies, and related methods

#58
20180266183
2018-09-20

Notching a wellbore while drilling

#59
20180258704
2018-09-13

Hybrid bit including earth-boring and percussion elements for drilling earth formations

#60
20180238131
2018-08-23

Selective downhole actuator

#61
20180230764
2018-08-16

Tool positioning and latching system

#62
20180195348
2018-07-12

Drill bit and method for casing while drilling

#63
20180187492
2018-07-05

Drilling bottom hole assembly for loss circulation mitigation

#64
20180179845
2018-06-28

Downhole stuck object removal tool

#65
20180179824
2018-06-28

Drilling device

#66
20180163480
2018-06-14

Drilling system drag member for simultaneous drilling and reaming

#67
20180112510
2018-04-26

Intelligent reamer for rotary/sliding drilling system and method

#68
20180080297
2018-03-22

Extendable element systems for downhole tools

#69
20180051524
2018-02-22

Expandable junk mill stabilizer

#70
20180030785
2018-02-01

BOTTOMHOLE ASSEMBLY

#71
20180010392
2018-01-11

Shaft enlargement arrangement for a boring system

#72
20180003038
2018-01-04

System and method for detection of actuator launch in wellbore operations

#73
20170247964
2017-08-31

Latchable casing while drilling systems and methods

#74
20170234075
2017-08-17

DRILLING TOOL

#75
20170234071
2017-08-17

Drilling apparatus with extensible pad

#76
20170211333
2017-07-27

Downhole rotary cutting tool

#77
20170211332
2017-07-27

Reamer

#78
20170204670
2017-07-20

Reamer

#79
20170183914
2017-06-29

Support features for extendable elements of a downhole tool body, tool bodies having such support features and related methods

#80
20170159365
2017-06-08

Underreamer with Radial Expandable Cutting Blocks

#81
20170159363
2017-06-08

RFID device for use downhole

#82
20170089177
2017-03-30

Controller for downhole tool

#83
20170058611
2017-03-02

Cutting structure with blade having multiple cutting edges

#84
20170058610
2017-03-02

Cutting structure of a downhole cutting tool

#85
20170022769
2017-01-26

Flexible tool housing

#86
20160375486
2016-12-29

Surface coating for metal matrix composites

#87
20160369568
2016-12-22

TWO-PHASE MANUFACTURE OF METAL MATRIX COMPOSITES

#88
20160356092
2016-12-08

Cutting structures, tools for use in subterranean boreholes including cutting structures and related methods

#89
20160348453
2016-12-01

Tool positioning and latching system

#90
20160319604
2016-11-03

Methods of forming earth-boring tools utilizing expandable reamer blades

#91
20160305190
2016-10-20

Expandable reamer

#92
20160290054
2016-10-06

PARTICLE EXCLUSION AND ACCUMULATION PREVENTION USING NANOFOREST FILTERS ON DOWNHOLE TOOLS

#93
20160281436
2016-09-29

Expandable reamers having nonlinearly expandable blades, and related methods

#94
20160281435
2016-09-29

Drilling device

#95
20160251920
2016-09-01

Hydraulic control of borehole tool deployment

#96
20160251904
2016-09-01

Expandable reamer assemblies, bottom hole assemblies, and related methods

#97
20160230508
2016-08-11

Downhole wireline cleaning tool

#98
20160153242
2016-06-02

Expandable reamers and methods of using expandable reamers

#99
20160102502
2016-04-14

Underreamer with adjustable cutter block expansion

#100
20160017664
2016-01-21

Spline insert for a downhole tool

#101
20160010393
2016-01-14

Ice auger assembly incorporating an ice reaming blade

#102
20150376963
2015-12-31

Measuring fluid properties in a downhole tool

#103
20150361726
2015-12-17

Extendable drilling tool

#104
20150292289
2015-10-15

Dual string section mill

#105
20150285004
2015-10-08

Apparatuses and methods for stabilizing downhole tools

#106
20150275605
2015-10-01

Single-trip casing cutting and bridge plug setting

#107
20150226009
2015-08-13

Near-Bit Borehole Opener Tool and Method of Reaming

#108
20150184476
2015-07-02

Tool positioning and latching system

#109
20150165583
2015-06-18

Diameter expansion drill bit

#110
20150144405
2015-05-28

CUTTER BLOCK FOR A DOWNHOLE UNDERREAMER

#111
20150144401
2015-05-28

HYDRAULICALLY ACTUATED TOOL WITH ELECTRICAL THROUGHBORE

#112
20150101864
2015-04-16

Intelligent reamer for rotary/sliding drilling system and method

#113
20150068813
2015-03-12

Reamer blades exhibiting at least one of enhanced gage cutting element backrakes and exposures and reamers so equipped

#114
20150068804
2015-03-12

Downhole tool for increasing a wellbore diameter

#115
20150053484
2015-02-26

Hole enlargement drilling device and methods for using same

#116
20140374161
2014-12-25

DEVICE FOR ENLARGING CAISSON BASES

#117
20140353032
2014-12-04

Expandable apparatus and related methods

#118
20140345952
2014-11-27

Method and apparatus for reaming well bore surfaces nearer the center of drift

#119
20140338976
2014-11-20

Extendable cutting tools for use in a wellbore

#120
20140311802
2014-10-23

Circumferential and longitudinal cutter coverage in continuation of a first bit diameter to a second expandable reamer diameter

#121
20140284109
2014-09-25

Method and apparatus for reaming well bore surfaces nearer the center of drift

#122
20140262523
2014-09-18

Underreamer for increasing a wellbore diameter

#123
20140246246
2014-09-04

Actuation assemblies, hydraulically actuated tools for use in subterranean boreholes including actuation assemblies and related methods

#124
20140246242
2014-09-04

Components of drilling assemblies, drilling assemblies, and methods of stabilizing drilling assemblies in wellbores in subterranean formations

#125
20140246236
2014-09-04

Expandable reamer assemblies, bottom-hole assemblies, and related methods

#126
20140238749
2014-08-28

Drilling tool and method for earth drilling

#127
20140227043
2014-08-14

Apparatus and method for installing ground anchoring systems

#128
20140158430
2014-06-12

Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter

#129
20140131109
2014-05-15

Adjustable diameter underreamer and methods of use

#130
20140131108
2014-05-15

Underreamer for increasing a wellbore diameter

#131
20140116712
2014-05-01

Deburring mill tool for wellbore cleaning

#132
20140110179
2014-04-24

REAMER TOOL POSITIONABLE IN A WELLBORE

#133
20140110171
2014-04-24

Downhole tool and control module

#134
20140083771
2014-03-27

Mechanical caliper system for a logging while drilling (LWD) borehole caliper

#135
20140048336
2014-02-20

Reamer with improved performance characteristics in hard and abrasive formations

#136
20140048335
2014-02-20

Reamer with improved performance characteristics in hard and abrasive formations

#137
20140034397
2014-02-06

Downhole reamer asymmetric cutting structures

#138
20140014315
2014-01-16

Modular downhole tool

#139
20140008128
2014-01-09

Large gauge concentric underreamer

#140
20130306381
2013-11-21

Apparatus and method for installing ground anchoring systems

#141
20130306380
2013-11-21

Utilization of expandable reamer blades in rigid earth-boring tool bodies

#142
20130306373
2013-11-21

Electronically activated underreamer and calliper tool

#143
20130299248
2013-11-14

Adjustable body supported cutter arms for underreamer

#144
20130292175
2013-11-07

Drilling assemblies including expandable reamers and expandable stabilizers, and related methods

#145
20130256036
2013-10-03

Cutting structures, tools for use in subterranean boreholes including cutting structures and related methods

#146
20130256035
2013-10-03

Expandable reamers and methods of using expandable reamers

#147
20130256034
2013-10-03

Expandable reamers having sliding and rotating expandable blades, and related methods

#148
20130248252
2013-09-26

Reaming shoe for increased borehole clearance and method of use

#149
20130199855
2013-08-08

DOWNHOLE TOOL

#150
20130192897
2013-08-01

Downhole tool activation

#151
20130161099
2013-06-27

Downhole cutting tool

#152
20130146361
2013-06-13

Apparatuses and methods for stabilizing downhole tools

#153
20130133949
2013-05-30

Extendable cutting tools for use in a wellbore

#154
20130098682
2013-04-25

Optimized reaming system based upon weight on tool

#155
20130092446
2013-04-18

Expandable reamer apparatus including stabilizers

#156
20130032406
2013-02-07

Systems and methods for drilling boreholes with noncircular or variable cross-sections

#157
20130008721
2013-01-10

Apparatus and method for installing ground anchoring systems

#158
20120325480
2012-12-27

Dual string section mill

#159
20120199366
2012-08-09

Actuator and method

#160
20120073879
2012-03-29

Downhole reamer asymmetric cutting structures

#161
20120055712
2012-03-08

Drilling apparatus

#162
20120037422
2012-02-16

Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter

#163
20120018173
2012-01-26

Wellbore tool with exchangeable blades

#164
20120012398
2012-01-19

Expandable tool with at least one blade that locks in place through a wedging effect

#165
20120012397
2012-01-19

Expandable tool for an earth boring system

#166
20110315449
2011-12-29

Retention of cutters in bore hole tools

#167
20110308861
2011-12-22

Expandable reamers for subterranean drilling and related methods

#168
20110297443
2011-12-08

Expandable reamer apparatus and related methods

#169
20110284233
2011-11-24

Hydraulic actuation of a downhole tool assembly

#170
20110278071
2011-11-17

Apparatus for rotary mining

#171
20110278064
2011-11-17

Electronically activated underreamer and calliper tool

#172
20110247878
2011-10-13

Expansion and sensing tool

#173
20110240374
2011-10-06

Downhole tool having a friction stirred surface region

#174
20110240373
2011-10-06

Down-the-hole drill hammer having an extendable drill bit assembly

#175
20110240372
2011-10-06

Article of manufacture having a sub-surface friction stir welded channel

#176
20110180330
2011-07-28

DRILLING ASSEMBLY WITH UNDERREAMING BIT AND METHOD OF USE

#177
20110173896
2011-07-21

Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole

#178
20110073330
2011-03-31

Earth-boring tools having expandable members and related methods

#179
20110024194
2011-02-03

System and method for one-trip hole enlargement operations

#180
20110017515
2011-01-27

Bore hole tool with magnetic blade retention

#181
20110005840
2011-01-13

Apparatus for rotary mining

#182
20110005836
2011-01-13

Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods

#183
20100288557
2010-11-18

Expandable reamer for subterranean boreholes and methods of use

#184
20100282511
2010-11-11

Wired Smart Reamer

#185
20100282463
2010-11-11

Pump in reverse outliner drilling system

#186
20100276201
2010-11-04

Secondary cutting structure

#187
20100276199
2010-11-04

Expandable reamer apparatus

#188
20100218997
2010-09-02

Cutting device with multiple cutting structures

#189
20100212886
2010-08-26

Downhole tool actuation having a seat with a fluid by-pass

#190
20100212885
2010-08-26

Downhole tool actuation having a seat with a fluid by-pass

#191
20100212884
2010-08-26

Ratchet mechanism in a fluid actuated device

#192
20100193248
2010-08-05

Methods, systems, and tool assemblies for distributing weight between an earth-boring rotary drill bit and a reamer device

#193
20100175928
2010-07-15

Hammer bit

#194
20100139981
2010-06-10

Hole enlargement drilling device and methods for using same

#195
20100089583
2010-04-15

Extendable cutting tools for use in a wellbore

#196
20100006338
2010-01-14

Optimized reaming system based upon weight on tool

#197
20090314548
2009-12-24

Reaming and stabilization tool and method for its use in a borehole

#198
20090288840
2009-11-26

Retrieval of bottom hole assembly during casing while drilling operations

#199
20090277689
2009-11-12

Activating device for a downhole tool

#200
20090266614
2009-10-29

Methods, systems, and bottom hole assemblies including reamer with varying effective back rake

#201
20090242275
2009-10-01

Stabilizer and reamer system having extensible blades and bearing pads and method of using same

#202
20090095532
2009-04-16

Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole

#203
20090057013
2009-03-05

Apparatus for rotary mining

#204
20080302534
2008-12-11

Full bore lined wellbores

#205
20080257608
2008-10-23

Reaming and stabilization tool and method for its use in a borehole

#206
20080245532
2008-10-09

Apparatus and methods of milling a restricted casing shoe

#207
20080110678
2008-05-15

Expandable reamer apparatus for enlarging boreholes while drilling

#208
20080105465
2008-05-08

Expandable reamer for subterranean boreholes and methods of use

#209
20080105464
2008-05-08

Moveable blades and bearing pads

#210
20070102195
2007-05-10

Expandable drill bit

#211
20070095574
2007-05-03

Drill bit with protection member

#212
20070089912
2007-04-26

Downhole tool having radially extendable members

#213
20070017708
2007-01-25

Expandable reamer apparatus for enlarging boreholes while drilling and methods of use

#214
20070007043
2007-01-11

Cutting device with multiple cutting structures

#215
20060144623
2006-07-06

Downhole under-reamer tool

#216
20060131076
2006-06-22

Enlarging well bores having tubing therein

#217
20060131024
2006-06-22

Accessing subterranean resources by formation collapse

#218
20060096785
2006-05-11

Expandable bit

#219
20060054362
2006-03-16

Bit assembly for a hammering drill

#220
20050274546
2005-12-15

Reaming and stabilization tool and method for its use in a borehole

#221
20050205305
2005-09-22

Under reamer

#222
20050145417
2005-07-07

Expandable reamer apparatus for enlarging subterranean boreholes and methods of use