ClassID:

135334

E21B17/22 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings Rods or pipes with helical structure

Recent Application in this class:
#1
20260071501
2026-03-12

DOWNHOLE CASING AUGER FOR REMOVAL OF PARAFFIN FROM OIL AND GAS WELLS

#2
20250376904
2025-12-11

COLLECTION UNIT FOR CUTTINGS

#3
20250270437
2025-08-28

HIGH-TEMPERATURE FLUIDS FOR COILED TUBING APPLICATIONS AND METHODS THEREOF

#4
20250179890
2025-06-05

Downhole Orienting Helix for Operations Requiring Multiple Orienting Sequences

#5
20250163765
2025-05-22

Drill String Components Having Multiple-Thread Joints

#6
20240352809
2024-10-24

HELICAL HARDBANDING

#7
20240218749
2024-07-04

Drill String Components Having Multiple-Thread Joints

#8
20240158687
2024-05-16

HIGH-TEMPERATURE FLUIDS FOR COILED TUBING APPLICATIONS AND METHODS THEREOF

#9
20240141736
2024-05-02

Drill Rods Having Stabilizers, And Systems And Methods Comprising Same

#10
20230383612
2023-11-30

Wear resistant tubular members and systems and methods for producing the same

#11
20230272681
2023-08-31

REMOVING WELLBORE COMPLETION COMPONENTS IN A WELLBORE

#12
20230003089
2023-01-05

Downhole traction tool and method of use

#13
20220356769
2022-11-10

Helical blade stabilizer with line-of-sight faces

#14
20220316312
2022-10-06

Reactive torque automatic balancing device for screw drilling tool, drilling string, and method

#15
20220162919
2022-05-26

Integrated piling tool with continuous drilling and circulation pouring

#16
20220145567
2022-05-12

Construction method and device for execution of a cast in-situ pile with multiple diameters decreasing with depth

#17
20220136199
2022-05-05

No Vibration Stone Column Drill

#18
20220081978
2022-03-17

Helical Hardbanding

#19
20220049564
2022-02-17

Sealed pressured horizontal directional drilling continuous coring device for engineering geological investigation

#20
20210340864
2021-11-04

Mud pulser and method for operating thereof

#21
20210310333
2021-10-07

Extended surface system with helical reamers

#22
20210172266
2021-06-10

Helical alignment sleeve

#23
20210047891
2021-02-18

Drill rod with internal fluid bypass porting

#24
20200340332
2020-10-29

Method and apparatus for washing an annulus

#25
20200318441
2020-10-08

Auger arrangement

#26
20200300049
2020-09-24

Wellbore cleanout tool

#27
20200299565
2020-09-24

High-temperature fluids for coiled tubing applications and methods thereof

#28
20200232304
2020-07-23

Downhole cleaning tool

#29
20200181990
2020-06-11

Drill string components having multiple-thread joints

#30
20200166160
2020-05-28

Internal spiral conduit bearing capacity reinforcing device and method for using the same

#31
20200102810
2020-04-02

Downhole cleaning apparatus

#32
20200095834
2020-03-26

Helical hardbanding

#33
20200024925
2020-01-23

Reverse rotary sprinkler drilling pipe system with anti-sticking function and its application method

#34
20190323633
2019-10-24

Method and apparatus for mining copper

#35
20190292855
2019-09-26

Downhole force generating tool

#36
20190277096
2019-09-12

Method and apparatus to rotate subsurface wellbore casing

#37
20190271215
2019-09-05

Top-down fracturing system

#38
20190218866
2019-07-18

Methods for constructing a helical strake segment using one or more shell sections and fins

#39
20190136675
2019-05-09

FLUID INJECTION FLOW CONTROL DEVICE FOR USE IN OIL WELLS

#40
20180313164
2018-11-01

Downhole vibratory tool for placement in drillstrings

#41
20180283120
2018-10-04

Method and apparatus for swarf disposal in wellbores

#42
20180216420
2018-08-02

Drill string components having multiple-thread joints

#43
20180187496
2018-07-05

Drill pipe

#44
20180179874
2018-06-28

A FLUID INJECTION FLOW CONTROL DEVICE FOR USE IN OIL WELLS

#45
20180155990
2018-06-07

Curbed links for wiring conduit

#46
20180135354
2018-05-17

Multiple speed drill bit assembly

#47
20180105905
2018-04-19

BAINITIC STEEL FOR ROCK DRILLING COMPONENT

#48
20180100354
2018-04-12

Method of using a downhole force generating tool

#49
20180038166
2018-02-08

Downhole force generating tool

#50
20180003011
2018-01-04

Louvered Pipe Shroud Assembly

#51
20170292326
2017-10-12

WELL COMPLETION SYSTEM AND METHOD, DRILLED WELL EXPLOITATION METHOD, USE OF SAME IN THE EXPLOITATION/EXTRACTION OF DRILLED WELLS, PACKAGING CAPSULE, TELESCOPIC JOINT, VALVE AND INSULATION METHOD, AND VALVE ACTUATION SYSTEM, SELECTION VALVE AND USE OF SAME, CONNECTOR AND ELECTROHYDRAULIC EXPANSION JOINT

#52
20170234097
2017-08-17

Wellhead mixing device

#53
20170204685
2017-07-20

Composite centralizer blade

#54
20170120315
2017-05-04

Soil auger and method of manufacture

#55
20170074071
2017-03-16

Downhole cleaning apparatus

#56
20170030168
2017-02-02

Top-down fracturing system

#57
20170016278
2017-01-19

Downhole production casing string

#58
20160369620
2016-12-22

Well logging with autonomous robotic diver

#59
20160362967
2016-12-15

Apparatus and method for setting a liner

#60
20160281432
2016-09-29

Direct torque helical displacement well and hydrostatic liquid pressure relief device

#61
20160264856
2016-09-15

Superhydrophic flow control device

#62
20160245062
2016-08-25

METHODS, STRINGS AND TOOLS TO ENHANCE WELLBORE FRACTURING

#63
20160237764
2016-08-18

Downhole hole cleaning joints and method of using same

#64
20160177637
2016-06-23

Method and apparatus to rotate subsurface wellbore casing

#65
20160168915
2016-06-16

System for non-destructive penetration of a substrate

#66
20160138397
2016-05-19

ANCHORING AND ANTI-CLOGGING DRILL ROD FOR COAL MINE FLOOR

#67
20160115743
2016-04-28

Modified Wellbore Casing Trajectories

#68
20160069134
2016-03-10

Device and system for percussion rock drilling

#69
20150368870
2015-12-24

Helical screw pile

#70
20150361729
2015-12-17

Drill stem element with fluid activation zone

#71
20150354303
2015-12-10

Method of using a downhole force generating tool

#72
20150354282
2015-12-10

Downhole force generating tool

#73
20150354281
2015-12-10

Downhole force generating tool

#74
20150344997
2015-12-03

BAINITIC STEEL FOR ROCK DRILLING COMPONENT

#75
20150337602
2015-11-26

Method of using a downhole force generating tool

#76
20150308219
2015-10-29

Apparatus and method for positioning of a fluidized plugging material in an oil well or gas well

#77
20150275590
2015-10-01

SYSTEMS AND METHODS FOR RUNNING TUBULARS INTO SUBTERRANEAN WELLBORES

#78
20140299380
2014-10-09

Drill string tubular component

#79
20140102808
2014-04-17

Drill string components having multiple-thread joints

#80
20130264049
2013-10-10

Plug counter and downhole tool

#81
20130101344
2013-04-25

Variable geometry auger coupler

#82
20120292021
2012-11-22

Rod Guide With Wrapping Vanes

#83
20120228034
2012-09-13

Drill stem components and string of components

#84
20120205161
2012-08-16

Auger

#85
20120073695
2012-03-29

Tubular Casing Member with Helical Threads

#86
20110284246
2011-11-24

PERFORATING GUN ASSEMBLY TO CONTROL WELLBORE FLUID DYNAMICS

#87
20110220235
2011-09-15

COMPOSITE TUBULAR PRODUCT

#88
20110067888
2011-03-24

Plug counter and method

#89
20110048803
2011-03-03

Drilling cuttings mobilizer and method for use

#90
20100326738
2010-12-30

Drill packer member, drill pipe, and corresponding drill pipe string

#91
20100300761
2010-12-02

Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment

#92
20100288556
2010-11-18

Ice Drill

#93
20100236829
2010-09-23

Stabilizer for drill strings

#94
20100187010
2010-07-29

Process and apparatus for subterranean drilling

#95
20100147531
2010-06-17

Downhole tools

#96
20100147045
2010-06-17

FLEXIBLE DRILL SHAFT

#97
20100101863
2010-04-29

Sonic drill rod with external surface features

#98
20090301710
2009-12-10

Fixed swirl inducing blast liner

#99
20090235850
2009-09-24

PIPING

#100
20090194337
2009-08-06

Spiral ribbed aluminum drillpipe

#101
20090107729
2009-04-30

DRILLING MACHINE

#102
20090101363
2009-04-23

Flexible liner for drilled drainhole deployment

#103
20090044954
2009-02-19

Method for Transporting Multiphase Fluids

#104
20080257606
2008-10-23

Flexible Drill Shaft

#105
20080257436
2008-10-23

Olefin production furnace having a furnace coil

#106
20080179101
2008-07-31

Auger

#107
20080115943
2008-05-22

Perforating gun assembly and method for controlling wellbore fluid dynamics

#108
20080073123
2008-03-27

Dual-member auger boring system

#109
20080053653
2008-03-06

Method of forming and securing a rod guide on a sucker rod

#110
20070215388
2007-09-20

Downhole Apparatus for Mobilising Drill Cuttings

#111
20070157985
2007-07-12

Tubing and piping for multiphase flow

#112
20070102151
2007-05-10

Helical rod guide and method

#113
20070056773
2007-03-15

Downhole impeller device

#114
20060243491
2006-11-02

Method and apparatus for removing cuttings in high-angle wells

#115
20060219441
2006-10-05

Stabiliser, jetting and circulating tool

#116
20060207801
2006-09-21

Technique for drilling straight bore holes in the earth

#117
20060196658
2006-09-07

Tubular slug reducer

#118
20060000993
2006-01-05

Cement flow control tool

#119
20050045386
2005-03-03

Drill string member

#120
20050000697
2005-01-06

Formed tubulars

#121
18735516
2025-07-22

Stick slip tool

#122
17974732
2024-07-09

Stick slip tool

#123
17518250
2023-06-13

Systems, methods and apparatus for stabilizing a downhole tool and fluid flow

#124
15078991
2016-08-30

Bidirectional stabilizer with impact arrestors and blades with wrap angles

#125
14981376
2016-10-18

Bidirectional stabilizer with impact arrestors

#126
14814710
2018-07-10

Downhole vibratory tool for placement in drillstrings

#127
14802104
2016-03-29

Bidirectional stabilizer