ClassID:

135471

E21B33/043 - CPC Classification

Classification description:

Sealing or packing boreholes or wells; Surface sealing or packing; Well heads; Setting-up thereof; Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads

Recent Application in this class:
#1
20260078651
2026-03-19

SUBSEA TOOL ASSEMBLY AND METHOD OF OPERATING A SUBSEA TOOL

#2
20260043305
2026-02-12

TUBING HEAD SPOOLS WITH ORIENTATION FEATURE

#3
20250290383
2025-09-18

ISOLATION SLEEVE

#4
20250270918
2025-08-28

INDUCTION LOOP CEMENTING PROGRESS DETECTION

#5
20250207471
2025-06-26

Subsea Wellhead Monitoring System

#6
20250154846
2025-05-15

Tubing Hanger Alignment Device and Space-out Mechanism

#7
20250154845
2025-05-15

Space-Out Mechanism for a Tubing Hanger and a Tree

#8
20250154844
2025-05-15

Tubing Hanger Alignment Device With Flanged End

#9
20250092752
2025-03-20

LIGHTWEIGHT FLOW MODULE

#10
20250052125
2025-02-13

Rigidized Seal Assembly Using Automated Space-Out Mechanism

#11
20250020037
2025-01-16

SYSTEM AND METHOD FOR REMOTELY CONTROLLING A RUNNING TOOL

#12
20240209711
2024-06-27

Subsea equipment alignment device

#13
20240209710
2024-06-27

Tubing hanger alignment device

#14
20240191589
2024-06-13

Tubing hanger assembly with adjustable load nut

#15
20240151116
2024-05-09

Lock Ring Actuator for Tubing Hanger Installation

#16
20240076948
2024-03-07

Configurable coupling assembly

#17
20240068319
2024-02-29

Subsea wellhead monitoring system

#18
20240060383
2024-02-22

Adapter for connecting concentric Christmas tree with eccentric production base

#19
20230407741
2023-12-21

Downhole fiber optic transmission for real-time well monitoring and downhole equipment actuation

#20
20230399913
2023-12-14

Apparatus and method for tubing hanger installation

#21
20230392466
2023-12-07

Barrier arrangement in wellhead assembly

#22
20230383617
2023-11-30

Lightweight flow module

#23
20230374878
2023-11-23

Tree orientation system and method for a resource extraction system

#24
20230340871
2023-10-26

Apparatus for and method of monitoring a drilling installation

#25
20230243242
2023-08-03

Compliant well insert sleeves

#26
20230228165
2023-07-20

System and method for hanger with debris pocket

#27
20230184048
2023-06-15

Tubing hanger assembly with adjustable load nut

#28
20230151710
2023-05-18

Subsea casing hanger running tool with anti-rotation feature and method for rotating casing into complex and deviated wellbores

#29
20230151709
2023-05-18

Method and apparatus for aligning a subsea tubing hanger

#30
20230130315
2023-04-27

METHANE HYDRATE PRODUCTION EQUIPMENT AND METHOD

#31
20230026935
2023-01-26

Rigidized seal assembly using automated space-out mechanism

#32
20220389781
2022-12-08

Barrier arrangement in wellhead assembly

#33
20220364428
2022-11-17

Tubing hanger alignment device with plug-based alignment mechanism

#34
20220364427
2022-11-17

Tubing hanger alignment device with torsional spring alignment mechanism

#35
20220364426
2022-11-17

Tubing hanger alignment device with helical slot alignment mechanism

#36
20220325614
2022-10-13

INDUCTION LOOP CEMENTING PROGRESS DETECTION

#37
20220259938
2022-08-18

Zero-gap hanger systems and methods

#38
20220243550
2022-08-04

Coiled piston assembly

#39
20220243549
2022-08-04

Annulus isolation device

#40
20220154545
2022-05-19

Configurable coupling assembly

#41
20220090461
2022-03-24

Subsea equipment alignment device

#42
20220042391
2022-02-10

Tubing hanger assembly with adjustable load nut

#43
20220018203
2022-01-20

Tubing hanger with shiftable annulus seal

#44
20210396090
2021-12-23

Coiled piston assembly

#45
20210324699
2021-10-21

ISOLATION SLEEVE

#46
20210324698
2021-10-21

Method of and system for connecting to a tubing hanger

#47
20210270104
2021-09-02

Completing wells

#48
20210262309
2021-08-26

Flow control module

#49
20210198970
2021-07-01

TUBING HANGER ALIGNMENT DEVICE

#50
20210198969
2021-07-01

Lightweight flow module

#51
20210189824
2021-06-24

Spring actuated adjustable load nut

#52
20210164190
2021-06-03

System and method for foundation of wellheads

#53
20210140310
2021-05-13

Downhole fiber optic transmission for real-time well monitoring and downhole equipment actuation

#54
20210087899
2021-03-25

Subsea equipment alignment device

#55
20210062604
2021-03-04

Subsea casing hanger running tool with anti-rotation feature and method for rotating casing into complex and deviated wellbores

#56
20210025258
2021-01-28

Tubing hanger alignment device

#57
20200399971
2020-12-24

Compact over pull-push stroking tool

#58
20200378205
2020-12-03

Crown plug pulling tool with bailer feature

#59
20200370387
2020-11-26

Casing hanger and annulus sealing device running tool for deepwater drilling, and method for using the same

#60
20200340318
2020-10-29

Continuous drilling system

#61
20200284117
2020-09-10

Conductorless subsea well

#62
20200248522
2020-08-06

Subsea wellhead system with flexible operation

#63
20200208486
2020-07-02

Tubing hanger installation tool

#64
20200182046
2020-06-11

Subsea well equipment landing indicator and locking indicator

#65
20200173244
2020-06-04

Subsea wellhead assembly

#66
20200123868
2020-04-23

Lightweight flow module

#67
20200123867
2020-04-23

Flow control module

#68
20200102802
2020-04-02

Subsea wellhead monitoring and controlling

#69
20200063520
2020-02-27

Wellhead arrangement and method

#70
20200063505
2020-02-27

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

#71
20200048978
2020-02-13

Hybrid two piece packoff assembly

#72
20200018134
2020-01-16

Particular relating to subsea well construction

#73
20200003015
2020-01-02

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

#74
20190368298
2019-12-05

Subsea system and method for high pressure high temperature wells

#75
20190360294
2019-11-28

Completion interface systems for use with surface BOPS

#76
20190277107
2019-09-12

OFFSHORE METHOD

#77
20190257171
2019-08-22

Ported U-cup annular wellhead hanger seal

#78
20190194895
2019-06-27

METHODS AND APPARATUS FOR FORMING AN OFFSHORE WELL

#79
20190178077
2019-06-13

Subsea well equipment landing indicator and locking indicator

#80
20190128084
2019-05-02

Subsea wellhead assembly

#81
20190120008
2019-04-25

Tubing hanger alignment device

#82
20190120007
2019-04-25

Method for pulling a crown plug

#83
20190085645
2019-03-21

Device and method for slanting a conductor casing

#84
20190048679
2019-02-14

SUBSEA COUPLER SYSTEM

#85
20190044256
2019-02-07

Connector assembly

#86
20190010776
2019-01-10

Tubing hanger setting confirmation system

#87
20190010775
2019-01-10

Tubing hanger setting confirmation system

#88
20180355699
2018-12-13

System and method for foundation of wellheads

#89
20180347140
2018-12-06

System and method for foundation of wellheads

#90
20180347135
2018-12-06

Offshore drilling and a configurable support structure for the same

#91
20180340391
2018-11-29

System and method for non-invasive power and data transmission

#92
20180258727
2018-09-13

Running tool for tubing hanger

#93
20180245425
2018-08-30

Moving-rotating linear covering tool

#94
20180223619
2018-08-09

Subsea system and methodology utilizing production receptacle structure

#95
20180223615
2018-08-09

Liner deployment assembly having full time debris barrier

#96
20180187513
2018-07-05

Annulus isolation valve assembly

#97
20180163499
2018-06-14

Well tube and a well bore component

#98
20180156005
2018-06-07

System for remote operation of downhole well equipment

#99
20180119513
2018-05-03

Tubular wellhead assembly

#100
20180112479
2018-04-26

APPARATUS AND METHOD FOR LANDING AND SETTING SLIP ASSEMBLY

#101
20180058162
2018-03-01

Passively motion compensated tubing hanger running tool assembly

#102
20180058156
2018-03-01

Method of running a passively motion compensated tubing hanger running tool assembly

#103
20180058155
2018-03-01

Passively motion compensated subsea well system

#104
20170356265
2017-12-14

Arrangement for supporting a wellhead

#105
20170350209
2017-12-07

Subsea umbilical termination assembly

#106
20170254166
2017-09-07

Well assembly with self-adjusting lockdown assembly

#107
20170247976
2017-08-31

Drainage for a telescope section of a landing string

#108
20170241239
2017-08-24

One trip blowout preventer cleaning and pressure testing

#109
20170183956
2017-06-29

System and methodology using annulus access valve

#110
20170167218
2017-06-15

Rotating hanger and running tool

#111
20170089182
2017-03-30

Subsea system and method for high pressure high temperature wells

#112
20170030160
2017-02-02

System and method for non-invasive power and data transmission

#113
20170022774
2017-01-26

Method and apparatus for pulling a crown plug

#114
20170016302
2017-01-19

Subsea well assembly and assoicated method

#115
20170002624
2017-01-05

Method and apparatus for managing annular fluid expansion and pressure within a wellbore

#116
20160333641
2016-11-17

Wellbore installation apparatus and associated methods

#117
20160305232
2016-10-20

SYSTEM AND METHOD FOR MONITORING TOOL ORIENTATION IN A WELL

#118
20160298393
2016-10-13

Process for constructing a well for exploiting a reservoir under a sea-bed or ocean-bed

#119
20160273318
2016-09-22

Subsea test tree intervention package

#120
20160177649
2016-06-23

Subsea completion with crossover passage

#121
20160160605
2016-06-09

Configurable subsea tree master valve block

#122
20160160604
2016-06-09

Configurable subsea tree master valve block

#123
20160145960
2016-05-26

Casing hanger shoulder ring for lock ring support

#124
20160069150
2016-03-10

Running tool with independent housing rotation sleeve

#125
20160024878
2016-01-28

System and method for accessing a well

#126
20160024867
2016-01-28

Method of subsea containment and system

#127
20160017687
2016-01-21

Mechanical hold-down assembly for a well tie-back string

#128
20160017680
2016-01-21

Subsea completion with crossover passage

#129
20150354308
2015-12-10

Downhole Equipment Suspension and Lateral Power System

#130
20150330157
2015-11-19

Telescoping joint with control line management assembly

#131
20150267482
2015-09-24

Triple activity drilling ship

#132
20150260001
2015-09-17

Mudline suspension metal-to-metal sealing system

#133
20150226024
2015-08-13

Latching assembly

#134
20150176348
2015-06-25

Apparatus for, and method of, landing items at a well location

#135
20150159458
2015-06-11

Orientation adapter for use with a tubing hanger

#136
20150152695
2015-06-04

Adjustable Riser Suspension System

#137
20150114668
2015-04-30

Flow-by holes with gallery and channel arrangement on wellhead and tubular hanger

#138
20150114661
2015-04-30

Stem head adapter with pistons

#139
20150114622
2015-04-30

Wellbore sealing assembly with grooves for enhanced sealing and lockdown capacity

#140
20150107846
2015-04-23

Method for pulling a crown plug from a subsea tree

#141
20150083432
2015-03-26

Triple activity drilling ship

#142
20150083431
2015-03-26

Recovery valve

#143
20150053412
2015-02-26

Vertical completion system including tubing hanger with valve

#144
20150027738
2015-01-29

Method and system for one-trip hanger installation

#145
20140345873
2014-11-27

Tubing hanger with coupling assembly

#146
20140332223
2014-11-13

Modular subsea completion

#147
20140305657
2014-10-16

Method and device for riserless drilling fluid recovery

#148
20140299328
2014-10-09

Subsea wellhead assembly, a subsea installation using said wellhead assembly, and a method for completing a wellhead assembly

#149
20140251630
2014-09-11

Wellhead seal assembly lockdown system

#150
20140238693
2014-08-28

Wellhead system for tieback retrieval

#151
20140158366
2014-06-12

Subsea completion with a tubing spool connection system

#152
20140076573
2014-03-20

Casing Debris Cleaner

#153
20140069633
2014-03-13

Tubing hanger running tool with integrated landing features

#154
20140054044
2014-02-27

Orienting a subsea tubing hanger assembly

#155
20140048277
2014-02-20

Subsea production system with downhole equipment suspension system

#156
20140034328
2014-02-06

Bore protector

#157
20130341032
2013-12-26

Securement arrangement for securing casing inside a subsea wellhead

#158
20130292127
2013-11-07

Plug installation system and method

#159
20130285369
2013-10-31

Tubular joint

#160
20130284449
2013-10-31

Subsea wellhead including monitoring apparatus

#161
20130248199
2013-09-26

WELLHEAD ASSEMBLY HAVING A SINUSOIDAL SEALING PROFILE AND A METHOD TO ASSEMBLE THE SAME

#162
20130248171
2013-09-26

Subsea multiple annulus sensor

#163
20130240216
2013-09-19

BOP lock down

#164
20130228339
2013-09-05

Apparatus for, and method of, landing items at a well location

#165
20130213671
2013-08-22

Casing hanger lockdown sleeve

#166
20130213661
2013-08-22

Wear bushing for locking to a wellhead

#167
20130175055
2013-07-11

Sealing mechanism for subsea capping system

#168
20130146297
2013-06-13

Preloading device

#169
20130146296
2013-06-13

Ratchet and latch mechanisms

#170
20130140775
2013-06-06

Seal With Bellows Type Nose Ring

#171
20130126181
2013-05-23

Multiplex tubing hanger

#172
20130098633
2013-04-25

RECOVERABLE PRODUCTION MODULE FOR USE WITH A PRODUCTION TREE

#173
20130075103
2013-03-28

METHOD AND SYSTEM FOR PERFORMING AN ELECTRICALLY OPERATED FUNCTION WITH A RUNNING TOOL IN A SUBSEA WELLHEAD

#174
20130068466
2013-03-21

LATCHING MECHANISM WITH ADJUSTABLE PRELOAD

#175
20130062056
2013-03-14

Multiple annulus universal monitoring and pressure relief assembly for subsea well completion systems and method of using same

#176
20130056282
2013-03-07

Running tool with independent housing rotation sleeve

#177
20130056218
2013-03-07

Riserless single trip hanger and packoff running tool

#178
20130056196
2013-03-07

Trapped pressure compensator

#179
20130037271
2013-02-14

Bridging hanger and seal running tool

#180
20130000920
2013-01-03

Hybrid seal

#181
20130000918
2013-01-03

FLOW MODULE PLACEMENT BETWEEN A SUBSEA TREE AND A TUBING HANGER SPOOL

#182
20120318518
2012-12-20

Subsea wellhead assembly

#183
20120312542
2012-12-13

Expandable solid load ring for casing hanger

#184
20120305269
2012-12-06

System and method for casing hanger running

#185
20120292035
2012-11-22

Tubing hanger setting confirmation system

#186
20120241162
2012-09-27

Casing hanger lockdown slip ring

#187
20120227974
2012-09-13

Method for pulling a crown plug

#188
20120222866
2012-09-06

Tubing hanger—production tubing suspension arrangement

#189
20120211236
2012-08-23

System and method for high-pressure high-temperature tieback

#190
20120186821
2012-07-26

LOCATION-AND-ROTATION FEEDBACK TOOL FOR SUBSEA WELLHEADS AND METHOD OF OPERATING SAME

#191
20120160512
2012-06-28

Wellhead tree pressure limiting device

#192
20120097399
2012-04-26

Expandable anchoring mechanism

#193
20120048567
2012-03-01

Modular subsea completion

#194
20120024536
2012-02-02

Wellhead tree pressure limiting device

#195
20120003048
2012-01-05

DEVICES AND METHOD FOR EQUIPMENT FOUNDATION IN THE SEA BED

#196
20110315392
2011-12-29

Subsea apparatus

#197
20110259597
2011-10-27

Wellhead having an integrated safety valve and method of making same

#198
20110253388
2011-10-20

Insertion of a pack-off into a wellhead

#199
20110253381
2011-10-20

Subsea wellhead with segmented fatigue reduction sleeve

#200
20110253378
2011-10-20

Subsea wellhead providing controlled access to a casing annulus

#201
20110247799
2011-10-13

Tubing hanger running tool with integrated landing features

#202
20110247798
2011-10-13

Tubing hanger running tool with integrated pressure release valve

#203
20110240307
2011-10-06

Wellhead hanger shoulder

#204
20110240306
2011-10-06

Bridging hanger and seal running tool

#205
20110226490
2011-09-22

Method and system for one-trip hanger installation

#206
20110209877
2011-09-01

Apparatus for, and method of, landing items at a well location

#207
20110168409
2011-07-14

High capacity running tool and method of setting a packoff seal

#208
20110147001
2011-06-23

Wellhead annulus monitoring

#209
20110114326
2011-05-19

MULTI-PIECE STACKED SEALING SYSTEM AND METHOD OF USING SAME

#210
20110017467
2011-01-27

Multi-section tree completion system

#211
20100252277
2010-10-07

High capacity running tool and method of setting a packoff seal

#212
20100243244
2010-09-30

Location-and-rotation feedback tool for subsea wellheads and method of operating same

#213
20100206588
2010-08-19

Seal system and method

#214
20100206575
2010-08-19

Self-energizing annular seal

#215
20100139910
2010-06-10

Annulus isolation valve

#216
20100116488
2010-05-13

Tubing hanger with integral annulus shutoff valve

#217
20100101800
2010-04-29

Subsea completion with a wellhead annulus access adapter

#218
20100089590
2010-04-15

Tubing hanger

#219
20100084143
2010-04-08

Tubing hanger seal

#220
20100078176
2010-04-01

Combined tree stab and control interface

#221
20090322029
2009-12-31

Metal-to-metal seal for smooth bore

#222
20090314494
2009-12-24

Wellhead housing bootstrap device

#223
20090236100
2009-09-24

PLUG RETRIEVAL AND DEBRIS REMOVAL TOOL

#224
20090211761
2009-08-27

Oil and gas well completion system and method of installation

#225
20090200039
2009-08-13

Method for securing a damaged wellhead

#226
20090071656
2009-03-19

METHOD OF RUNNING A TUBING HANGER AND INTERNAL TREE CAP SIMULTANEOUSLY

#227
20080308278
2008-12-18

Adjustable threaded hanger

#228
20080230229
2008-09-25

Method of running a tubing hanger and internal tree cap simultaneously

#229
20080156478
2008-07-03

Universal tubing hanger suspension assembly and well completion system and method of using same

#230
20080135289
2008-06-12

Method for running casing while drilling system

#231
20080105463
2008-05-08

Apparatus for, and method of, landing items at a well location

#232
20080078555
2008-04-03

Integral orientation system for horizontal tree tubing hanger

#233
20080000685
2008-01-03

Triple activity drilling ship

#234
20070246220
2007-10-25

Retrievable tubing hanger installed below tree

#235
20070204999
2007-09-06

Completion suspension valve system

#236
20070169940
2007-07-26

Tubing hanger and wellhead housing with mating tubing annulus passages

#237
20070039738
2007-02-22

Orientation-less ultra-slim well and completion system

#238
20070034379
2007-02-15

Plug installation system for deep water subsea wells

#239
20070029079
2007-02-08

Subsea tubing hanger assembly for an oil or gas well

#240
20070023189
2007-02-01

Tubing hanger connection

#241
20070007012
2007-01-11

Flow completion system

#242
20060260799
2006-11-23

Universal tubing hanger suspension assembly and well completion system and method of using same

#243
20060249290
2006-11-09

Electrically operated actuation tool for subsea completion system components

#244
20060237189
2006-10-26

Method of suspending, completing and working over a well

#245
20060231248
2006-10-19

Shoulder ring set on casing hanger trip

#246
20060225891
2006-10-12

Apparatus for, and method of, landing items at a well location

#247
20060191680
2006-08-31

Metal-to-metal seal for bridging hanger or tieback connection

#248
20060118308
2006-06-08

Dual bore well jumper

#249
20060108120
2006-05-25

Well production and multi-purpose intervention access hub

#250
20060108118
2006-05-25

Apparatus and method for installation of subsea well completion systems

#251
20060048945
2006-03-09

High pressure wellhead assembly interface

#252
20060016604
2006-01-26

Shoulder ring set on casing hanger trip

#253
20060011347
2006-01-19

Inner riser adjustable hanger and seal assembly

#254
20050284639
2005-12-29

Pressure-compensated flow shut-off sleeve for wellhead and subsea well assembly including same

#255
20050274526
2005-12-15

Casing hanger with integral load ring

#256
20050269096
2005-12-08

Method and apparatus for blow-out prevention in subsea drilling/completion systems

#257
20050263288
2005-12-01

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

#258
20050205262
2005-09-22

Subsea production systems

#259
20050167118
2005-08-04

Tubing annulus valve

#260
20050133216
2005-06-23

Electrically operated actuation tool for subsea completion system components

#261
20050121198
2005-06-09

Subsea completion system and method of using same

#262
20050103525
2005-05-19

Method and device for liner system

#263
20050098321
2005-05-12

Subsea completion system, and methods of using same

#264
20050051337
2005-03-10

Collet load shoulder

#265
20050051336
2005-03-10

Subsea tubing hanger lockdown device

#266
20050028980
2005-02-10

Method and apparatus of suspending, completing and working over a well

#267
20050023866
2005-02-03

Non-rotational casing hanger and seal assembly running tool

#268
20050006107
2005-01-13

One trip string tensioning and hanger securing method

#269
18799869
2025-06-17

Tubing head spools with orientation feature

#270
18740372
2025-09-09

Wellhead equipment for drilling

#271
18420001
2025-02-11

Offshore platform slot recovery tool system

#272
17988399
2024-02-06

Mechanical hanger running tool with fluid bearing system and method

#273
17860621
2024-01-09

Offshore platform slot recovery tool system

#274
17338548
2022-07-12

Offshore platform slot recovery tool system

#275
15470099
2018-04-17

Protected annulus flow arrangement for subsea completion system