E21B31/12 - CPC Classification Index

ClassID:

135451 ⎘

E21B31/12 - CPC Classification

Classification description:

Fishing for or freeing objects in boreholes or wells Grappling tools, e.g. tongs or grabs

Sub-classes:

E21B31/125 » {specially adapted for parted wire line or ropes} 17
E21B31/14 » with means deflecting the direction of the tool, e.g. by use of knuckle joints 11
E21B31/16 » combined with cutting or destroying means 65
E21B31/18 » gripping externally, e.g. overshot 105
E21B31/20 » gripping internally, e.g. fishing spears 150

Recent Application in this class:

20260125960

2026-05-07

TONG ASSEMBLY WITH SWIVELING TRUNNIONS

20260098451

2026-04-09

RETRIEVAL TOOL STRING

20260078646

2026-03-19

TONG ASSEMBLY POSITION ADJUSTMENT FOR THREADED CONNECTION ALIGNMENT

20260063011

2026-03-05

EXPANDABLE POLYMER GROUT FOR WELLBORE APPLICATIONS

20250334016

2025-10-30

WELLHEAD RETRIEVAL TOOL AND METHOD OF RETRIEVING A WELLHEAD

20240309728

2024-09-19

Self-setting plug

20230392464

2023-12-07

Controllable downhole drilling and completion tool separating device and their method of use

20230366290

2023-11-16

Self-setting plug

20230313675

2023-10-05

Nested tubulars for drifting a plurality of cylindrical diameters

#10

20230279745

2023-09-07

Retrievable waste capsules, retrieval-tool, systems and methods thereof

#11

20230279742

2023-09-07

Retrievable waste capsules, retrieval-tool, systems and methods thereof

#12

20230279741

2023-09-07

RETRIEVABLE WASTE CAPSULES, RETRIEVAL-TOOL, SYSTEMS AND METHODS THEREOF

#13

20230184046

2023-06-15

Robotic fishing tool

#14

20230167692

2023-06-01

Method and system for reservoir monitoring using electrical connectors with completion assemblies

#15

20210340841

2021-11-04

Removable core wiper plug

#16

20210246751

2021-08-12

Patch for joining downhole ends of pipes

#17

20200399971

2020-12-24

Compact over pull-push stroking tool

#18

20200190929

2020-06-18

Advanced pulling prong

#19

20200173252

2020-06-04

Removable core wiper plug

#20

20190309592

2019-10-10

Fishing tool receiver with locking collar

#21

20190120007

2019-04-25

Method for pulling a crown plug

#22

20190106949

2019-04-11

Handling and recovery devices for tubular members and associated methods

#23

20180363830

2018-12-20

Method of providing a latch for pipeline remediation

#24

20180304319

2018-10-25

METHOD AND SYSTEM FOR RECOVERING AND DISPLACING FLUID FROM A PIPE

#25

20180128072

2018-05-10

Finishing tool with inflatable overshot

#26

20170089152

2017-03-30

Handling and recovery devices for tubular members and associated methods

#27

20170044874

2017-02-16

Tool for creating impressions of downhole objects

#28

20170044860

2017-02-16

Downhole fishing tool and method of use

#29

20170030159

2017-02-02

Pulling tool electromechanical actuated release

#30

20170022774

2017-01-26

Method and apparatus for pulling a crown plug

#31

20170008043

2017-01-12

Method and system for recovering and displacing fluid from a pipe

#32

20170002618

2017-01-05

Downhole fishing tool and method of use

#33

20160273307

2016-09-22

Downhole tool method and device

#34

20160168938

2016-06-16

Packer or bridge plug with sequential equalization then release movements

#35

20160084064

2016-03-24

DETERMINING A SHAPE OF A DOWNHOLE OBJECT

#36

20150211318

2015-07-30

Signal operated drilling tools for milling, drilling, and/or fishing operations

#37

20150184471

2015-07-02

Handling and recovery devices for tubular members and associated methods

#38

20150159454

2015-06-11

Downhole fishing tool and method of use

#39

20150159453

2015-06-11

Downhole fishing tool and method of use

#40

20150144358

2015-05-28

Downhole release tool

#41

20150144335

2015-05-28

POWER RETRIEVING TOOL

#42

20150107846

2015-04-23

Method for pulling a crown plug from a subsea tree

#43

20150107825

2015-04-23

DOWNHOLE DEVICE FOR DATA ACQUISITION DURING HYDRAULIC FRACTURING OPERATION AND METHOD THEREOF

#44

20140338886

2014-11-20

Smart Drop-off tool and hang-off tool for a logging string

#45

20140311757

2014-10-23

Pulling tool

#46

20140311733

2014-10-23

Overshot

#47

20140056647

2014-02-27

Pipe retriever

#48

20130014934

2013-01-17

Smart drop-off tool and hang-off tool for a logging string

#49

20120227974

2012-09-13

Method for pulling a crown plug

#50

20120145395

2012-06-14

Heavy duty rope sockets and related methods

#51

20120125612

2012-05-24

Overshot device

#52

20090272544

2009-11-05

Tools and methods for hanging and/or expanding liner strings

#53

20090266544

2009-10-29

Signal operated tools for milling, drilling, and/or fishing operations

#54

20090151940

2009-06-18

System and Method to Provide Verification during a Fishing Operation in a Wellbore

#55

18478236

2024-12-31

Orientable downhole fishing system with cameras