Patents-Review.com
ClassID:

135319 ⎘

E21B17/1042 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings; Wear protectors; Centralising devices, e.g. stabilisers Elastomer protector or centering means

Sub-classes:
Recent Application in this class:
#1
20260034652
2026-02-05

Tool For Removing A Rubber Protector From A Riser Flange

 #2
20260009297
2026-01-08

STABILIZER INCLUDING MODIFIED HELICAL WELLBORE STABILIZING ELEMENTS

 #3
20250263994
2025-08-21

SENSOR TRANSPORTATION APPARATUS FOR A WIRELINE LOGGING TOOL STRING

 #4
20250101814
2025-03-27

Pipe Connector

 #5
20240084657
2024-03-14

Sensor transportation apparatus for a wireline logging tool string

 #6
20230392453
2023-12-07

Centralizer with opposing hollow spring structure

 #7
20230392451
2023-12-07

Centralizer with elongated rods

 #8
20230392450
2023-12-07

Centralizer with opposing hollow spring structure

 #9
20230374867
2023-11-23

DIRECTIONAL DRILL SECURING DEVICE AND METHOD

 #10
20230203916
2023-06-29

IN SITU EXPANDABLE TUBULARS

 #11
20230127866
2023-04-27

Centralizers for production tubing

 #12
20220307331
2022-09-29

Pressure-dampening casing to reduce stress load on cement sheath

 #13
20220298879
2022-09-22

Sensor transportation apparatus for a wireline logging tool string

 #14
20220235637
2022-07-28

Pipe connector

 #15
20220228448
2022-07-21

Molded composite inner liner for metallic sleeves

 #16
20220195815
2022-06-23

Lateral isolator

 #17
20220162918
2022-05-26

Downhole apparatus for reducing rotational and linear friction between a downhole tool and/or a downhole tool string comprising the downhole tool and a wall of a wellbore

 #18
20210381323
2021-12-09

STABILIZER INCLUDING MODIFIED HELICAL WELLBORE STABILIZING ELEMENTS

 #19
20210363836
2021-11-25

Method to attain full annular coverage during cementing or mud circulation

 #20
20210310314
2021-10-07

Directional drill securing device and method

 #21
20210293096
2021-09-23

CENTRALIZER

 #22
20210254429
2021-08-19

Method of preparing a wellbore tubular comprising an elastomer sleeve

 #23
20210198963
2021-07-01

Sensor transportation apparatus and guide device

 #24
20210079740
2021-03-18

Modified tubular

 #25
20210040802
2021-02-11

Apparatus and method of connecting tubulars

 #26
20200408074
2020-12-31

Perforating device for horizontal wells

 #27
20200208481
2020-07-02

Orientation apparatus and hole finder device for a wireline logging tool string

 #28
20200165881
2020-05-28

Centralising assembly for a downhole device, coupling device including a centralising device and method of manufacture

 #29
20200149358
2020-05-14

Method and apparatus for wellbore centralization

 #30
20200080401
2020-03-12

In situ expandable tubulars

 #31
20200018124
2020-01-16

Dampers for mitigation of downhole tool vibrations

 #32
20190376348
2019-12-12

MOLDED COMPOSITE INNER LINER FOR METALLIC SLEEVES

 #33
20190368272
2019-12-05

Pneumatic drilling with packer slideable along stem drill rod

 #34
20190353027
2019-11-21

Downhole probe sleeves and methods for making probe sleeves

 #35
20190284883
2019-09-19

Non-rotating vibration reduction sub

 #36
20190264543
2019-08-29

In situ expandable tubulars

 #37
20190226286
2019-07-25

Directional drill securing device and method

 #38
20190093302
2019-03-28

Adjustable rebar centralizer for use in a drilled shaft/bore hole

 #39
20190071936
2019-03-07

Centralizer

 #40
20180347292
2018-12-06

Drill rod clamping system and methods of using same

 #41
20180328131
2018-11-15

Wellbore logging tool assembly

 #42
20180266192
2018-09-20

Casing string assembly with composite pre-milled window

 #43
20180252054
2018-09-06

Alignment sub with deformable sleeve

 #44
20180223610
2018-08-09

Apparatus and method of connecting tubulars

 #45
20180195357
2018-07-12

Protective sheath for logging tools

 #46
20180187529
2018-07-05

Expanding well tubulars interconnected by pin-box assemblies optimized for expansion

 #47
20180119852
2018-05-03

Expanding well tubulars interconnected by pin-box assemblies optimized for expansion

 #48
20180106145
2018-04-19

Stabilizer with fin-mounted electrode for providing signals to drill string antenna

 #49
20180087350
2018-03-29

In situ expandable tubulars

 #50
20180087337
2018-03-29

Sensor transportation apparatus and guide device

 #51
20180038172
2018-02-08

POLYMER-BASED CENTRALIZER FOR DOWNHOLE DRILLING APPARATUS

 #52
20170198839
2017-07-13

Connecting oil country tubular goods

 #53
20170175463
2017-06-22

Drill rod clamping system and methods of using same

 #54
20170030165
2017-02-02

Sound absorber for a drilling apparatus

 #55
20160356100
2016-12-08

Casing centralizer

 #56
20160298400
2016-10-13

Pipe connector

 #57
20160290068
2016-10-06

Centralizer for use with wellbore drill collar

 #58
20160237764
2016-08-18

Downhole hole cleaning joints and method of using same

 #59
20160201406
2016-07-14

Centraliser

 #60
20160168924
2016-06-16

Stabilizer

 #61
20160130886
2016-05-12

Downhole apparatus and method

 #62
20160069141
2016-03-10

Downhole protection apparatus

 #63
20160017679
2016-01-21

Protective sheath for logging tools

 #64
20160017671
2016-01-21

Wellbore electrical isolation system

 #65
20160002986
2016-01-07

Method for making pipe centralizer having low-friction coating

 #66
20150308207
2015-10-29

Sensor transportation apparatus and guide device

 #67
20150275591
2015-10-01

Casing centralizer

 #68
20150252636
2015-09-10

Sucker rod guide

 #69
20150136384
2015-05-21

Wiper and seal assembly for a pump

 #70
20150122484
2015-05-07

Modified tubular

 #71
20150117152
2015-04-30

Method and apparatus for acoustic noise isolation in a subterranean well

 #72
20140367085
2014-12-18

Modified tubular

 #73
20140262352
2014-09-18

Cable by-pass for spooled cables

 #74
20140262339
2014-09-18

METHOD AND APPARATUS FOR CONTROLLING EROSION IN A DOWNHOLE TOOL

 #75
20140151026
2014-06-05

Casing centralizer and method of manufacturing same

 #76
20140124269
2014-05-08

Centralizer for downhole probes

 #77
20140034295
2014-02-06

METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE

 #78
20140027107
2014-01-30

Continuous rod centralizer

 #79
20130098601
2013-04-25

Sucker rod guide

 #80
20130068483
2013-03-21

Composite limit collar

 #81
20120292043
2012-11-22

DOWNHOLE TOOLS

 #82
20120285679
2012-11-15

METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE

 #83
20120138289
2012-06-07

Downhole centraliser

 #84
20120074692
2012-03-29

Connecting oil country tubular goods

 #85
20110114338
2011-05-19

Non-rotating casing centralizer

 #86
20110114307
2011-05-19

Open hole non-rotating sleeve and assembly

 #87
20110005775
2011-01-13

Apparatus and methods to protect connections

 #88
20100175888
2010-07-15

Downhole Device Actuator and Method

 #89
20100089143
2010-04-15

RESERVOIR MONITORING APPARATUS AND METHOD

 #90
20100059218
2010-03-11

Method of forming downhole apparatus, downhole apparatus and centralizer comprising the same

 #91
20090151931
2009-06-18

Well string centralizer and method of forming

 #92
20080314585
2008-12-25

System and method for making drilling parameter and or formation evaluation measurements during casing drilling

 #93
20080217063
2008-09-11

In-situ method of forming a non-rotating drill pipe protector assembly

 #94
20080164019
2008-07-10

Well string centralizer and method of forming

 #95
20080156488
2008-07-03

Downhole tools

 #96
20070267199
2007-11-22

Apparatus and methods to protect connections

 #97
20070235224
2007-10-11

Drill pipe with vibration dampening liner

 #98
20070231074
2007-10-04

Clamp for anchoring production tube, electrohydraulic hose and electric cable simultaneously

 #99
20070131414
2007-06-14

METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE

 #100
20060278405
2006-12-14

Method and apparatus for friction reduction in a downhole tool

 #101
13921588
2018-01-16

Sucker rod apparatus and methods for manufacture and use