ClassID:

135294

E21B17/021 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings; Couplings; joints Devices for subsurface connecting or disconnecting by rotation

Recent Application in this class:
#1
20250154831
2025-05-15

DOWNHOLE TOOL, METHOD, AND SYSTEM

#2
20250122771
2025-04-17

Anchor With Multiple Arms For Minimal Rotation Of Latch During Guided Orientation

#3
20250084707
2025-03-13

PASSIVE ROTATION DISCONNECT

#4
20250067126
2025-02-27

METHODS AND SYSTEMS FOR A CLUTCH ALLOWING FOR ONE WAY FREE ROTATION OF A MANDREL

#5
20250059847
2025-02-20

PROCESSES FOR INJECTION OF FLUIDS INTO A WELLBORE VIA DRILL PIPE

#6
20250034952
2025-01-30

Downhole wet-mate systems with offset stinger and methods for deployment and wet-mate connecting by rotation of the offset stinger

#7
20250003302
2025-01-02

Whipstock integrated to completion string for coiled tubing operations

#8
20240401420
2024-12-05

Swivel Sub With Biasing Member

#9
20240392630
2024-11-28

COMPLETING AND WORKING OVER A WELLBORE

#10
20240360728
2024-10-31

MECHANICALLY ACTUATED TUBULAR DRILLING, REAMING AND RUNNING TOOL WITH SLIP SET CONTROL

#11
20240068301
2024-02-29

Interventionless methods and systems for testing a liner top

#12
20230349238
2023-11-02

Downhole tool for connecting with a conveyance line

#13
20230323737
2023-10-12

Wet connect system and method

#14
20230119621
2023-04-20

Passive rotation disconnect

#15
20230014708
2023-01-19

Selective connection of annular regions

#16
20220389771
2022-12-08

Integrated whipstock and separation method thereof

#17
20220341271
2022-10-27

Electro-mechanical release tool and associated methods

#18
20220235616
2022-07-28

Operating tool for an artificial lift system

#19
20220018193
2022-01-20

Disconnect device

#20
20210381320
2021-12-09

Mechanically actuated tubular drilling, reaming and running tool with slip set control

#21
20210293117
2021-09-23

Single trip liner hanger system

#22
20210164299
2021-06-03

Disconnect sub

#23
20200408074
2020-12-31

Perforating device for horizontal wells

#24
20200308951
2020-10-01

Automatic drill pipe coupling detection control system

#25
20200270953
2020-08-27

Apparatus for connecting drilling components between rig and riser

#26
20200263505
2020-08-20

Ground drilling device and method for drilling in soil

#27
20200024914
2020-01-23

Systems and methods for tubular element handling

#28
20190389038
2019-12-26

Well access tool

#29
20190383107
2019-12-19

Hydraulically actuated safety sub

#30
20190195027
2019-06-27

Rotationally selectable lock of shaft to housing

#31
20190078395
2019-03-14

Multi-functional drilling experiment platform

#32
20180363386
2018-12-20

Combined multi-coupler for top drive

#33
20180347286
2018-12-06

Assembly, system and method for directed high-pressure fluid delivery

#34
20180038196
2018-02-08

Tie back float collar

#35
20180038163
2018-02-08

Preventing Buckling For Downhole Linear Actuator

#36
20170234081
2017-08-17

Releasable locking mechanism for locking a housing to a drilling shaft of a rotary drilling system

#37
20170009534
2017-01-12

Torque limiting device

#38
20160356095
2016-12-08

Protection assembly for downhole wet connectors

#39
20160265337
2016-09-15

Nanofiber strain gauge sensors in downhole tools

#40
20160010399
2016-01-14

System and method for coupling a wellbore survey tool to a retrievable sensor module

#41
20150368983
2015-12-24

Reciprocating debris exclusion device for downhole connectors

#42
20150330156
2015-11-19

Swivel and method of use

#43
20150259996
2015-09-17

On-demand release tool system and methodology

#44
20150204144
2015-07-23

Apparatus and method for setting a liner

#45
20150068756
2015-03-12

Multilateral junction system and method thereof

#46
20150060080
2015-03-05

METHODS AND APPARATUS FOR DISCONNECTING A LINE FROM A DEVICE DISPOSED WITHIN A PIPE OR WELLBORE

#47
20150041153
2015-02-12

QUARTER TURN TORQUE ANCHOR AND CATCHER

#48
20140352978
2014-12-04

Device for a pipe handling unit and method of inserting and withdrawing a pipe string in/from a borehole

#49
20140314475
2014-10-23

Connector

#50
20140174749
2014-06-26

METHOD AND APPARATUS FOR DOWNHOLE INSTALLATION OF COILED TUBING STRINGS

#51
20140110130
2014-04-24

Anchor Latch on Off For Sucker Rods

#52
20130220617
2013-08-29

Adjustable engagement system for tool removal and method of use

#53
20130140029
2013-06-06

Torque limiting device

#54
20120305237
2012-12-06

Tool for removing wellhead components

#55
20120181045
2012-07-19

Apparatus and method for controlling the connection and disconnection speed of downhole connectors

#56
20120145411
2012-06-14

Running tool with feedback mechanism

#57
20120132439
2012-05-31

Multifunction downhole release tool mechanism with lost motion

#58
20110308809
2011-12-22

Auxiliary subsurface compensator

#59
20110229270
2011-09-22

Installation method of flexible pipe with subsea connector, utilizing a pull down system

#60
20110108288
2011-05-12

Apparatus and method for controlling the connection and disconnection speed of downhole connectors

#61
20110108287
2011-05-12

Apparatus and method for controlling the connection and disconnection speed of downhole connectors

#62
20110108286
2011-05-12

Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors

#63
20100319929
2010-12-23

Dual anchoring tubular back-off tool

#64
20100206561
2010-08-19

Apparatus and method for controlling the connection and disconnection speed of downhole connectors

#65
20100175888
2010-07-15

Downhole Device Actuator and Method

#66
20100147531
2010-06-17

Downhole tools

#67
20080128168
2008-06-05

Apparatus and Method

#68
20060157252
2006-07-20

Subsea riser disconnect and method

#69
15710531
2020-05-12

Casing string torque transfer and suspension system and method for mandrel casing hangers