ClassID:

135456

E21B31/20 - CPC Classification

Classification description:

Fishing for or freeing objects in boreholes or wells; Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears

Recent Application in this class:
#1
20260125961
2026-05-07

TUBING ANCHOR CATCHER OPERATED BY MANDREL AXIAL MOVEMENT

#2
20260103953
2026-04-16

DOWNHOLE TOOL

#3
20250376905
2025-12-11

BACK PRESSURE VALVE RECOVERY TOOL AND METHODS OF USE

#4
20250354448
2025-11-20

Apparatus To Move An Object In An Open Hole Section of A Wellbore

#5
20250290380
2025-09-18

Method for Casing Recovery

#6
20250243724
2025-07-31

MECHANICAL FISHING TOOL WITH A BUILT-IN CAMERA

#7
20250230723
2025-07-17

Methods and Apparatus for Casing Recovery

#8
20250003306
2025-01-02

SPEAR AND PACKER TOOL, AN ASSEMBLY COMPRISING SAID TOOL, AND A METHOD FOR USING SAID TOOL AND SAID ASSEMBLY

#9
20240401419
2024-12-05

Method and apparatus for retrieving tubing using disconnectable sub in a wellbore

#10
20240328273
2024-10-03

METHOD AND SYSTEM FOR RETRIEVING A WHIPSTOCK WITH A DRILL BIT IN A WELLBORE

#11
20240328272
2024-10-03

ROTATING OVERSHOT GUIDE

#12
20240309718
2024-09-19

Improvements In Or Relating To Well Abandonment and Slot Recovery

#13
20240287862
2024-08-29

HARDENED GRAPPLING ELEMENTS FOR RETRIEVING DOWNHOLE TOOLS

#14
20240218756
2024-07-04

Inner tube assembly of drill tool and rope coring drill tool thereof

#15
20240209707
2024-06-27

AXIAL POSITION-CONTROLLED OPERATION TOOLSTRING AND METHOD

#16
20240141743
2024-05-02

Systems and methods for running tubulars

#17
20240060379
2024-02-22

DOWNHOLE CASING REMOVAL TOOL AND METHOD

#18
20240044220
2024-02-08

METHOD FOR PULLING CASING

#19
20230407722
2023-12-21

Cutting a valve within a well stack

#20
20230383616
2023-11-30

ADJUSTABLE FISHING GRAPPLE TOOL

#21
20230243225
2023-08-03

DOWNHOLE WIRELINE RECOVERY TOOL AND METHOD OF RECOVERING DOWNHOLE WIRELINES

#22
20230193716
2023-06-22

Expandable overshot-spear tool

#23
20230132716
2023-05-04

Over-the-line modular weight bar

#24
20230068934
2023-03-02

Flow diversion valve for downtool tool assembly

#25
20230064823
2023-03-02

Downhole tool

#26
20230061851
2023-03-02

Improvements In Or Relating To Wellbore Operations

#27
20230039813
2023-02-09

RELEASABLE RETRIEVING TOOL WITH LUG AND SLOT CONNECTION

#28
20220341273
2022-10-27

Removing a tubular from a wellbore

#29
20220333454
2022-10-20

Well abandonment

#30
20220333449
2022-10-20

Systems and methods for running tubulars

#31
20220268120
2022-08-25

Fishing scanning tool

#32
20220243548
2022-08-04

Systems and methods for running tubulars

#33
20220178217
2022-06-09

Releasing tubulars in wellbores using downhole release tools

#34
20220145718
2022-05-12

Well abandonment and slot recovery

#35
20220127922
2022-04-28

Well abandonment and slot recovery

#36
20220074277
2022-03-10

Methods and systems for disconnecting and reconnecting casing

#37
20220042389
2022-02-10

Milling packers below restrictions in a wellbore casing

#38
20220034182
2022-02-03

Downhole pulling tool with selective anchor actuation

#39
20220010642
2022-01-13

System and method for moving stuck objects in a well

#40
20210355778
2021-11-18

Or relating to well abandonment and slot recovery

#41
20210301616
2021-09-30

Downhole tool

#42
20210262307
2021-08-26

Fish retrieval from wellbore

#43
20210198968
2021-07-01

Downhole casing pulling tool

#44
20210198967
2021-07-01

Well abandonment and slot recovery

#45
20210198961
2021-07-01

Improvements In Or Relating To Well Abandonment

#46
20210170519
2021-06-10

Frequency modulation for magnetic pressure pulse tool

#47
20210156213
2021-05-27

Reverse-circulation drilling assemblies and methods of using same

#48
20210115747
2021-04-22

Flow Diversion Valve for Downhole Tool Assembly

#49
20210054711
2021-02-25

Fishing neck for plunger

#50
20210054710
2021-02-25

Fish retrieval from wellbore

#51
20210054706
2021-02-25

Vertically cutting downhole tubulars

#52
20200378197
2020-12-03

Heave compensation system for assembling a drill string

#53
20200347687
2020-11-05

Method of removing a downhole casing

#54
20200248521
2020-08-06

Enhanced geometry receiving element for a downhole tool

#55
20200248520
2020-08-06

Fishing tool with electric release

#56
20200240224
2020-07-30

Methods and systems for disconnecting and reconnecting casing

#57
20200240223
2020-07-30

Methods and systems for disconnecting casing

#58
20200224509
2020-07-16

Downhole cut and pull tool and method of use

#59
20200190929
2020-06-18

Advanced pulling prong

#60
20200088003
2020-03-19

Or relating to well abandonment and slot recovery

#61
20200056438
2020-02-20

Repulsion force systems and methods for metal fish retrieval

#62
20200003021
2020-01-02

Reverse-circulation drilling assemblies and methods of using same

#63
20190376357
2019-12-12

Repulsion force systems and methods for metal fish retrieval

#64
20190338612
2019-11-07

Electronic release tool

#65
20190284894
2019-09-19

Downhole casing pulling tool

#66
20190257168
2019-08-22

Method of removing a downhole casing

#67
20190162046
2019-05-30

Diverter valve for a bottom hole assembly

#68
20190162033
2019-05-30

Bottom hole assembly for cutting and pulling a tubular

#69
20190048677
2019-02-14

Apparatus for removing a section of casing or lining from a well-bore, and methods

#70
20180363830
2018-12-20

Method of providing a latch for pipeline remediation

#71
20180266191
2018-09-20

Collet device with an adjustable snap value

#72
20180209225
2018-07-26

Lifting device for picking up a member from the bottom of the sea

#73
20180202250
2018-07-19

Gripping tool for removing a section of casing from a well

#74
20180187504
2018-07-05

Method of removing equipment from a section of a wellbore and related apparatus

#75
20180171735
2018-06-21

Core barrel head assembly and method

#76
20180128072
2018-05-10

Finishing tool with inflatable overshot

#77
20180045007
2018-02-15

Magnetic pulse actuation arrangement for downhole tools and method

#78
20180043463
2018-02-15

Frequency modulation for magnetic pressure pulse tool

#79
20180003005
2018-01-04

Downhole shifting tool

#80
20180002993
2018-01-04

Wear bushing retrieving system and method

#81
20170298704
2017-10-19

Downhole tool for removing a casing portion

#82
20170183923
2017-06-29

Heave compensation system for assembling a drill string

#83
20170159388
2017-06-08

Method and apparatus for retrieving a tubing from a well

#84
20170122053
2017-05-04

Gripping tool for removing a section of casing from a well

#85
20170030159
2017-02-02

Pulling tool electromechanical actuated release

#86
20170022773
2017-01-26

Downhole tool for removing a casing portion

#87
20170009533
2017-01-12

Connection apparatus

#88
20170002619
2017-01-05

Method and device for activating and deactivating a GS-tool

#89
20160375486
2016-12-29

Surface coating for metal matrix composites

#90
20160369573
2016-12-22

Method of incorporating remote communication with oilfield tubular handling apparatus

#91
20160298402
2016-10-13

Activating tool for displacing of a component in a well tube and method for adjusting the activating tool

#92
20160281450
2016-09-29

Gripper assembly for downhole tools

#93
20160265295
2016-09-15

One-trip cut and pull system and apparatus

#94
20160177639
2016-06-23

Actuator assembly for tubular running device

#95
20160115758
2016-04-28

Petroleum instrument salvaging connector and petroleum instrument

#96
20160115757
2016-04-28

PETROLEUM INSTRUMENT SALVAGING SYSTEM AND SALVAGING HEAD

#97
20160115756
2016-04-28

Petroleum instrument hoisting system and hoisting head

#98
20160076327
2016-03-17

Downhole casing pulling tool

#99
20160060984
2016-03-03

Replacable dies

#100
20160024865
2016-01-28

DEVICES AND SYSTEMS FOR EXTRACTING DRILLING EQUIPMENT THROUGH A DRILLSTRING

#101
20150376967
2015-12-31

Gripper assembly for downhole tools

#102
20150369038
2015-12-24

Determining stuck point of tubing in a wellbore

#103
20150275603
2015-10-01

Head assembly

#104
20150226031
2015-08-13

Multi-stage flow device

#105
20150176356
2015-06-25

Freeing pipe stuck in a subterranean well

#106
20150176347
2015-06-25

Heave compensation system for assembling a drill string

#107
20150034321
2015-02-05

Downhole spear having mechanical release mechanism for use in wellbores and methods of using same

#108
20140352976
2014-12-04

Method and an apparatus for retrieving a tubing from a well

#109
20140311757
2014-10-23

Pulling tool

#110
20140311733
2014-10-23

Overshot

#111
20140251616
2014-09-11

Downhole tool for removing a casing portion

#112
20140231087
2014-08-21

Apparatus and method for cutting and pulling of a casing

#113
20140231073
2014-08-21

Method of incorporating remote communication with oilfield tubular handling apparatus

#114
20140138969
2014-05-22

Fishing guide for directing a skewed fish in a wellbore

#115
20140027117
2014-01-30

System and method of cutting and removing casings from wellbore

#116
20130333895
2013-12-19

Tool for extracting an object engaged in a fluid exploitation pipe, extraction device and related method

#117
20130168984
2013-07-04

Internal pipe gripping tool

#118
20130049385
2013-02-28

Method and system for sealing and handling pipe

#119
20120298376
2012-11-29

Tubular coupling device

#120
20120298366
2012-11-29

Well fishing method and system

#121
20120285684
2012-11-15

Multi-position mechanical spear for multiple tension cuts while removing cuttings

#122
20120090832
2012-04-19

Downhole actuator

#123
20120074722
2012-03-29

Head assembly

#124
20120061074
2012-03-15

Gripper assembly for downhole tools

#125
20110220346
2011-09-15

Downhole actuator

#126
20110174542
2011-07-21

Tubular member adaptor apparatus

#127
20110036574
2011-02-17

Spoolable coiled tubing spear for use in wellbores and methods of using same

#128
20110024118
2011-02-03

Well fishing method and system

#129
20100307768
2010-12-09

Downhole tubular lifter and method of using the same

#130
20100212915
2010-08-26

Pipe handling system

#131
20100212887
2010-08-26

Gripper assembly for downhole tools

#132
20100200215
2010-08-12

Pipe running tool

#133
20100155140
2010-06-24

PIPE RUNNING TOOL HAVING A PRIMARY LOAD PATH

#134
20100116499
2010-05-13

Internal release connector and method

#135
20100116487
2010-05-13

Internal release connector and method

#136
20100111467
2010-05-06

Measuring apparatus, venturi and venturi insertion tool

#137
20100096849
2010-04-22

Internal release connector and method

#138
20100018695
2010-01-28

Gripper assembly for downhole tools

#139
20090206620
2009-08-20

Spearhead assembly

#140
20090151951
2009-06-18

Adjustable Diameter Fishing Tool

#141
20080223584
2008-09-18

Downhole retrieving tool and method

#142
20080078559
2008-04-03

Gripper assembly for downhole tools

#143
20070193751
2007-08-23

Casing running and drilling system

#144
20070102922
2007-05-10

Device and method for laying rigid tubular pipes

#145
20070034372
2007-02-15

Internal release connector and method

#146
20070017670
2007-01-25

Gripper assembly for downhole tools

#147
20060278402
2006-12-14

Casing and drill pipe filling and circulating method

#148
20060260819
2006-11-23

Run-in and retrieval device for a downhole tool

#149
20060201716
2006-09-14

Gripper assembly for downhole tools

#150
20060124305
2006-06-15

Pipe running tool having a cement path

#151
20060124293
2006-06-15

Pipe running tool having a primary load path

#152
20060118293
2006-06-08

Pipe running tool having internal gripper

#153
20050269138
2005-12-08

Spearhead assembly

#154
20050199398
2005-09-15

Method and apparatus for retrieving an object from a well bore

#155
20050082055
2005-04-21

Gripper assembly for downhole tools

#156
20050034894
2005-02-17

Orientation device for a core sample

#157
20050000684
2005-01-06

Apparatus for handling tubular goods

#158
18738494
2025-12-09

Back pressure valve recovery tool and methods of use

#159
16014968
2019-08-20

Casing grapple