ClassID:

135338

E21B19/006 - CPC Classification

Classification description:

Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform including heave compensators

Recent Application in this class:
#1
20260117649
2026-04-30

FREQUENCY BASED RIG ANALYSIS

#2
20260015916
2026-01-15

AUTOMATED HEAVE COMPENSATION

#3
20250347181
2025-11-13

RISER SUSPENSION DEVICE WITH MOVEMENT LIMITER

#4
20240254901
2024-08-01

HYDRAULIC VALVE WITH LINEAR ADJUSTABLE THROTTLING GATE AND A HYDRAULIC VELOCITY FUSE THROTTLING GATE

#5
20230023261
2023-01-26

Drilling plants and methods

#6
20220403709
2022-12-22

WELL CONTROL SYSTEM AND METHOD OF USE

#7
20220307332
2022-09-29

Offshore drilling system, vessel and method

#8
20220195818
2022-06-23

Disruptive coupling systems and methods for subsea systems

#9
20220106844
2022-04-07

Top Connections of Subsea Risers

#10
20220098935
2022-03-31

Connection system for a marine drilling riser

#11
20220049559
2022-02-17

Platform assembly

#12
20210363837
2021-11-25

Offshore drilling rig assembly and method

#13
20210355762
2021-11-18

Hydro-pneumatic cylinder with annulus fluid bypass

#14
20210348455
2021-11-11

Top connections of subsea risers

#15
20210301601
2021-09-30

Drilling rig hoisting system

#16
20210262308
2021-08-26

Telescoping electrical connector joint

#17
20210262298
2021-08-26

Motion compensating floor system and method

#18
20210238935
2021-08-05

Method and system for mitigating cable wear in a hoisting system

#19
20210230948
2021-07-29

Cable management on marine drilling risers

#20
20210207471
2021-07-08

Systems and methods for monitoring components of a well

#21
20210140250
2021-05-13

Disruptive coupling systems and methods for subsea systems

#22
20210087892
2021-03-25

Passive heave compensator

#23
20210062594
2021-03-04

Lift and turning device

#24
20210062592
2021-03-04

Compensated drill floor

#25
20200400046
2020-12-24

Hydraulic valve with linear adjustable throttling gate and a hydraulic velocity fuse throttling gate

#26
20200378197
2020-12-03

Heave compensation system for assembling a drill string

#27
20200370377
2020-11-26

Offshore drilling rig comprising an anti-recoil system

#28
20200347682
2020-11-05

HYBRID TENSIONING OF RISER STRING OPERATING WITH ENERGY STORAGE DEVICE

#29
20200318708
2020-10-08

System and Method for Improved Heave Compensation

#30
20200313507
2020-10-01

Apparatus for supporting a flywheel on a floating vessel and methods thereof

#31
20200290850
2020-09-17

Top-mounted hoist for use in a derrick or drilling mast of an oil and gas rig

#32
20200224505
2020-07-16

Compensated elevator link

#33
20200199946
2020-06-25

Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling

#34
20200115968
2020-04-16

WELL INTERVENTION MONOHULL VESSEL

#35
20200103049
2020-04-02

Offshore vessel, marine pipeline installation system and method

#36
20200063505
2020-02-27

Surface platform for use with surface bops and high-pressure risers

#37
20200048054
2020-02-13

HEAVE MOTION COMPENSATION SYSTEM

#38
20200040671
2020-02-06

Movable wellbay assembly

#39
20200039615
2020-02-06

System arranged on a marine vessel or platform, such as for providing heave compensation and hoisting

#40
20200011141
2020-01-09

Offshore subsea wellbore activities system and method

#41
20200003015
2020-01-02

Connections for use in high-pressure risers and make-up equipment therefor

#42
20190360294
2019-11-28

Completion interface systems for use with surface BOPS

#43
20190360282
2019-11-28

Drilling Unit Comprising an Electric Heave-Compensation System

#44
20190330954
2019-10-31

WEAR INDICATOR FOR A JOINT BETWEEN A RISER AND A FLOATING PLATFORM

#45
20190330934
2019-10-31

Motion compensating floor system and method

#46
20190316630
2019-10-17

Asymmetric bearing for riser tensioner system

#47
20190257160
2019-08-22

Floating oil and gas facility with a movable wellbay assembly

#48
20190256173
2019-08-22

Offshore drilling system, vessel and method

#49
20190195032
2019-06-27

RISER GAS HANDLING SYSTEM AND METHOD OF USE

#50
20190186213
2019-06-20

OFFSHORE COILED TUBING SYSTEM

#51
20190178040
2019-06-13

HIGH DEGREE OF FREEDOM RISER TENSIONER SYSTEM

#52
20190145191
2019-05-16

Depth compensated actuator and use of same in association with a transportable heave compensator

#53
20190145185
2019-05-16

Hoisting system

#54
20190112881
2019-04-18

Hoisting system

#55
20190071938
2019-03-07

System and method for providing tension or heave compensation in an offshore drilling environment

#56
20190063638
2019-02-28

Marine reel lay method pipeline installation system and methods

#57
20190023359
2019-01-24

Offshore drilling system, vessel and method

#58
20180355681
2018-12-13

Passive inline motion compensator

#59
20180328134
2018-11-15

Topside standalone lubricator for below-tension-ring rotating control device

#60
20180313174
2018-11-01

Movement compensation system for a load attached to a movable facility comprising hybrid damping means

#61
20180313173
2018-11-01

Offshore drilling rig comprising an anti-recoil system

#62
20180305992
2018-10-25

Remote operated vehicle removable flexible joint elastomer protection tool

#63
20180282137
2018-10-04

Hoisting and tensioning bearing saver

#64
20180266195
2018-09-20

Electric linear actuation system equipped with energy storage

#65
20180258730
2018-09-13

Integrated rotating control device and gas handling system for a marine drilling system

#66
20180258713
2018-09-13

Drilling apparatus

#67
20180258712
2018-09-13

Motion compensator system and method

#68
20180258711
2018-09-13

Steel catenary riser top interface

#69
20180238124
2018-08-23

HYBRID TENSIONING OF RISER STRING OPERATING WITH ENERGY STORAGE DEVICE

#70
20180238123
2018-08-23

ANTI-RECOIL CONTROL DESIGN USING A HYBRID RISER TENSIONING SYSTEM IN DEEPWATER DRILLING

#71
20180216421
2018-08-02

Heave compensation system

#72
20180202243
2018-07-19

Riser tensioning system

#73
20180171727
2018-06-21

Motion compensation system for a load hanging from a mobile unit with a main cylinder and a secondary cylinder

#74
20180163484
2018-06-14

Offshore drilling vessel

#75
20180156359
2018-06-07

Marine reel lay method pipeline installation system and methods

#76
20180156358
2018-06-07

Offshore vessel, marine pipeline installation system and method

#77
20180155994
2018-06-07

Flexible hang-off for a rigid riser

#78
20180141625
2018-05-24

Floating production unit and method of installing a floating production unit

#79
20180135379
2018-05-17

Annular packer system and method

#80
20180128062
2018-05-10

Device for suspending a tubular from a floating vessel

#81
20180080290
2018-03-22

Method and system for lubricating riser slip joint and containing seal leakage

#82
20180066481
2018-03-08

Floating oil and gas facility with a movable wellbay assembly

#83
20180058155
2018-03-01

Passively motion compensated subsea well system

#84
20180045013
2018-02-15

VALVED TREE MEMBER FOR A RISER SYSTEM AND TELESCOPING DEVICE FOR INCLUSION IN A RISER SYSTEM

#85
20180038173
2018-02-08

Top-mounted compensator for use in a motion compensation system

#86
20180003257
2018-01-04

Compensator device

#87
20180002988
2018-01-04

Riser system

#88
20170341717
2017-11-30

Offshore drilling system, vessel and method

#89
20170321499
2017-11-09

Heave compensation method

#90
20170321498
2017-11-09

System for compensating heaving for an element hooked onto movable equipment

#91
20170298694
2017-10-19

Method and apparatus for drilling multiple subsea wells from an offshore platform at a single site

#92
20170254384
2017-09-07

System for controlling the movement of a load

#93
20170254160
2017-09-07

SELF-ADJUSTING REEL ASSEMBLY APPARATUS, SYSTEM AND METHOD

#94
20170254159
2017-09-07

Inverted pull-up riser tensioner

#95
20170247985
2017-08-31

Landing string retainer system

#96
20170183923
2017-06-29

Heave compensation system for assembling a drill string

#97
20170114602
2017-04-27

Mechanically coupling a bearing assembly to a rotating control device

#98
20170082212
2017-03-23

Control device for controlling a valve arrangement and method for controlling a safety arrangement comprising said control device and said valve arrangement

#99
20170074057
2017-03-16

Offshore drilling system, vessel and methods

#100
20170051847
2017-02-23

Marine reel lay method pipeline installation vessel and methods

#101
20170051564
2017-02-23

Bending and torsional stiffener for a riser tensioner

#102
20170044847
2017-02-16

Well intervention device and offshore floating installation

#103
20170015391
2017-01-19

Floating structure

#104
20170009537
2017-01-12

COMPACT COMPENSATING CYLINDER

#105
20160376862
2016-12-29

Method and apparatus for drilling multiple subsea wells from an offshore platform at a single site

#106
20160362948
2016-12-15

Self-adjusting reel assembly apparatus, system and method

#107
20160362947
2016-12-15

Method for constant tension and slippage setting on a reel using accelerometers to detect rotational direction

#108
20160362946
2016-12-15

Method for constant tension and slippage setting on a reel using proximity sensors to detect rotational direction

#109
20160362945
2016-12-15

METHOD OF MAINTAINING CONSTANT TENSION ON A REEL UMBILICAL

#110
20160326823
2016-11-10

Wellhead system with gasket seal

#111
20160312546
2016-10-27

MOTION COMPENSATION FOR DRILL PIPE

#112
20160290071
2016-10-06

Integral Self-Contained Drillstring Compensator

#113
20160268857
2016-09-15

Low inertia direct drive drawworks

#114
20160237766
2016-08-18

Long Stroke Riser Tensioner System and Wellbay Structure for a Floating Unit

#115
20160230480
2016-08-11

Offshore well system with connection system

#116
20160222739
2016-08-04

Gooseneck conduit system

#117
20160194925
2016-07-07

Hybrid tensioning of riser string operating with energy storage device

#118
20160186515
2016-06-30

Telescoping joint packer assembly

#119
20160168927
2016-06-16

Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling

#120
20160153245
2016-06-02

Offshore drilling vessel

#121
20160145952
2016-05-26

Enhanced ram-style riser tensioner

#122
20160145951
2016-05-26

Enhanced ram-style riser tensioner cylinder

#123
20160145943
2016-05-26

Method and apparatus for drilling multiple subsea wells from an offshore platform at a single site

#124
20160137466
2016-05-19

System for Hoisting a Load on an Offshore Rig

#125
20160060977
2016-03-03

Coiled tubing lift frame assembly and method of use thereof

#126
20160060976
2016-03-03

Riser tension protector and method of use thereof

#127
20160039644
2016-02-11

Subsea heave compensator

#128
20160024861
2016-01-28

Offshore well drilling system with nested drilling risers

#129
20160024853
2016-01-28

Deflection absorbing tensioner frame

#130
20160002012
2016-01-07

Passive heave compensator

#131
20150368992
2015-12-24

Marine riser tensioner with load transferring centralization

#132
20150362039
2015-12-17

Passive heave compensator

#133
20150361753
2015-12-17

Wellhead system with gasket seal

#134
20150361736
2015-12-17

Heave compensation winches

#135
20150361735
2015-12-17

Hoisting systems with heave compensation

#136
20150354296
2015-12-10

TELESCOPIC RISER JOINT

#137
20150330160
2015-11-19

Floating structure and riser systems for drilling and production

#138
20150330159
2015-11-19

Guiding assembly for a piping system

#139
20150315860
2015-11-05

Offshore drilling installation and method for offshore drilling

#140
20150315856
2015-11-05

Device for connection and disconnection of an active heave compensator

#141
20150300102
2015-10-22

Multi capacity riser tensioners

#142
20150263575
2015-09-17

Low inertia direct drive drawworks

#143
20150184470
2015-07-02

Plunger-type wire riser tensioner

#144
20150176347
2015-06-25

Heave compensation system for assembling a drill string

#145
20150176346
2015-06-25

Method and system for wireline intervention in a subsea well from a floating vessel

#146
20150136412
2015-05-21

Riser tensioning system

#147
20150129238
2015-05-14

Device for compensation of wave influenced distance variations on a drill string

#148
20150129236
2015-05-14

Wellhead system with gasket seal

#149
20150096761
2015-04-09

Offshore vessel and method of operation of such an offshore vessel

#150
20150034326
2015-02-05

System and method for managing heave pressure from a floating rig

#151
20150008382
2015-01-08

Motion compensation system

#152
20150000924
2015-01-01

Gooseneck conduit system

#153
20140338920
2014-11-20

Workover riser compensator system

#154
20140331908
2014-11-13

Heave compensation and tensioning apparatus, and method of use thereof

#155
20140308105
2014-10-16

Method and an apparatus for rigging up intervention equipment in a lifting arrangement utilized on a floating vessel

#156
20140262315
2014-09-18

Drilling mud recovery system

#157
20140246203
2014-09-04

Compensator

#158
20140231091
2014-08-21

Systems for stabilizing oilfield equipment

#159
20140202767
2014-07-24

Contingent continuous circulation drilling system

#160
20140202327
2014-07-24

Hydro-pneumatic tensioner with fluid retention device

#161
20140190386
2014-07-10

Offshore drilling vessel

#162
20140186125
2014-07-03

Restraining device for a tensioner assembly

#163
20140174753
2014-06-26

System and method for controlling the pressure in a hydrocarbon well

#164
20140151058
2014-06-05

Marine riser with side tension members

#165
20140151057
2014-06-05

Drilling vessel

#166
20140144648
2014-05-29

Connector

#167
20140069658
2014-03-13

Floating structure and riser systems for drilling and production

#168
20140060416
2014-03-06

Offshore drilling vessel

#169
20140034329
2014-02-06

Backup heave compensation system and lifting arrangement for a floating drilling vessel

#170
20140010596
2014-01-09

Hybrid tensioning of riser string

#171
20130312979
2013-11-28

Heave compensating system

#172
20130233562
2013-09-12

Blowout preventer assembly

#173
20130230358
2013-09-05

Offshore System with Subsea Riser

#174
20130228340
2013-09-05

Wellhead system with gasket seal

#175
20130195559
2013-08-01

SEAFASTENING APPARATUS FOR A TENSIONER ASSEMBLY

#176
20130112421
2013-05-09

METHOD AND A SYSTEM FOR CONTROLLING MOVEMENTS OF A FREE-HANGING TUBULAR

#177
20130098627
2013-04-25

Method and apparatus for drilling multiple subsea wells from an offshore platform at a single site

#178
20130092388
2013-04-18

Gooseneck conduit system

#179
20130087342
2013-04-11

Riser system and method of use

#180
20130014991
2013-01-17

Drilling system and method of operating a drilling system

#181
20130014688
2013-01-17

Riser technology

#182
20130014687
2013-01-17

Offshore drilling vessel

#183
20120325487
2012-12-27

Method for stabilizing oilfield equipment

#184
20120325486
2012-12-27

Gooseneck conduit system

#185
20120318517
2012-12-20

Connecting device for kill/choke lines between a riser and a floating drilling vessel

#186
20120267117
2012-10-25

Device for a safety connector for a pipe string suspension

#187
20120241164
2012-09-27

Method for motion compensation during active intervention operations

#188
20120227976
2012-09-13

Offshore well intervention lift frame and method

#189
20120217016
2012-08-30

Riser tensioner

#190
20120205118
2012-08-16

Workover riser compensator system

#191
20120201611
2012-08-09

METHOD AND APPARATUS FOR FACILITATING HANG OFF OF MULTIPLE TOP TENSION RISER OR UMBILICALS FROM A COMPENSATED TENSIONING DECK

#192
20120132435
2012-05-31

Downhole Intervention

#193
20120132433
2012-05-31

Safety joint and riser

#194
20120099930
2012-04-26

System for supplemental tensioning for enhanced platform design and related methods

#195
20120073113
2012-03-29

Adaptor flange for rotary control device

#196
20120070225
2012-03-22

Hydraulically actuated safety lock ring

#197
20120031622
2012-02-09

Trigger joint

#198
20120018166
2012-01-26

Vessel for operating on underwater wells and working methods of said vessel

#199
20110280668
2011-11-17

Hang-Off Adapter for Offshore Riser Systems and Associated Methods

#200
20110253445
2011-10-20

System and method for managing heave pressure from a floating rig

#201
20110240305
2011-10-06

FLOATING WELL INTERVENTION ARRANGEMENT COMPRISING A HEAVE COMPENSATED WORK DECK AND METHOD FOR WELL INTERVENTION

#202
20110209651
2011-09-01

Riser for Coil Tubing/Wire Line Injection

#203
20110203802
2011-08-25

Pressure control device with remote orientation relative to a rig

#204
20110192611
2011-08-11

Riser joint coupling

#205
20110170955
2011-07-14

Tensioning a riser

#206
20110146556
2011-06-23

Active heave compensation with active damping control

#207
20110100639
2011-05-05

Floating offshore structure for hydrocarbon production

#208
20110048310
2011-03-03

Offshore drilling vessel

#209
20110036287
2011-02-17

Offshore drilling vessel

#210
20110011320
2011-01-20

RISER TECHNOLOGY

#211
20110005768
2011-01-13

Method and apparatus for motion compensation during active intervention operations

#212
20110005767
2011-01-13

Riser system comprising pressure control means

#213
20110005766
2011-01-13

Deployment System

#214
20100314168
2010-12-16

Flywheel-based energy storage on a heave-compensating drawworks

#215
20100158615
2010-06-24

Riser tensioner with shrouded rods

#216
20090304454
2009-12-10

Workover Riser Compensator System

#217
20090133881
2009-05-28

HEAVE MOTION COMPENSATION

#218
20080271896
2008-11-06

Device in Connection with Heave Compensation

#219
20080251980
2008-10-16

Depth compensated subsea passive heave compensator

#220
20080149390
2008-06-26

Preloaded riser coupling system

#221
20070196182
2007-08-23

External high pressure fluid reservoir for riser tensioner cylinder assembly

#222
20070084606
2007-04-19

Rig assist compensation system

#223
20070063507
2007-03-22

System, method, and apparatus for a radially-movable line termination system for a riser string on a drilling rig

#224
20070044975
2007-03-01

Preloaded riser coupling system

#225
20070044974
2007-03-01

Riser make-up tool

#226
20070044973
2007-03-01

Riser joint coupling

#227
20070012452
2007-01-18

System and method for limiting vortex-induced vibrations on an offshore production riser

#228
20060280560
2006-12-14

Riser tensioner with shrouded rods

#229
20060254776
2006-11-16

Co-linear tensioner and methods of installing and removing same

#230
20060196672
2006-09-07

Heave compensation system for hydraulic workover

#231
20060180314
2006-08-17

Co-linear tensioner and methods of installing and removing same

#232
20060154764
2006-07-13

Ram-type tensioner assembly having integral hydraulic fluid accumulator

#233
20060151176
2006-07-13

Two-part telescopic tensioner for risers at a floating installation for oil and gas production

#234
20060108121
2006-05-25

Riser tensioner with lubricant reservoir

#235
20060102356
2006-05-18

Device and a method for well intervention

#236
20050263288
2005-12-01

Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production

#237
20050247452
2005-11-10

Portable drill string compensator

#238
20050211430
2005-09-29

Multi-purpose coiled tubing handling system

#239
20050147473
2005-07-07

Riser tensioner with shrouded rods

#240
20050129464
2005-06-16

Motion compensation system and method

#241
20050123359
2005-06-09

Hydro-pneumatic tensioner with stiffness altering secondary accumulator

#242
20050077049
2005-04-14

Inline compensator for a floating drill rig

#243
20050074296
2005-04-07

Hydro-pneumatic tensioner with stiffness altering secondary accumulator

#244
18916988
2026-04-14

Multi-purpose compensator system

#245
18477143
2025-02-18

Multi-purpose compensator system

#246
17038247
2022-01-25

Open water coiled tubing control system

#247
15602487
2018-06-12

Wireline riser tensioner system and method

#248
15253451
2017-11-14

Tensioner cylinder with internal gas bladder in high pressure chamber

#249
14457389
2016-05-17

Riser tensioner assembly