ClassID:

135459

E21B33/02 - CPC Classification

Classification description:

Sealing or packing boreholes or wells Surface sealing or packing

Sub-classes:
Recent Application in this class:
#1
20260009305
2026-01-08

ROTATING CONTROL DEVICE

#2
20250012162
2025-01-09

SEALING RING AND JOINT FOR OIL DRILLING PLANT

#3
20240309951
2024-09-19

Bi-Directional Seal Element and Sealing System

#4
20240125191
2024-04-18

Pressure control assembly

#5
20230349256
2023-11-02

Stuffing box with pressurized fluid chamber and related methods

#6
20230287752
2023-09-14

Pressure control assembly

#7
20230160285
2023-05-25

BOREHOLE TOOL AND SYSTEM

#8
20230081099
2023-03-16

FRONT ACCESS PACKING ARRANGEMENT AND A PACKING ASSEMBLY INSTALLATION AND REMOVAL METHOD

#9
20230074251
2023-03-09

Fracturing wing valves, assemblies, and methods

#10
20230016342
2023-01-19

Valve device and method

#11
20220025737
2022-01-27

Closing device for wells or the like

#12
20210310317
2021-10-07

Oilfield casing centralization tool

#13
20210189832
2021-06-24

Fracturing wing valves, assemblies, and methods

#14
20210082543
2021-03-18

Method for establishing chart for designing mechanical properties of cement stones in large-scale fracturing oil well

#15
20200362666
2020-11-19

CONNECTION BETWEEN AN OIL AND GAS FRACTURING TREE AND A ZIPPER MODULE

#16
20200182002
2020-06-11

Large width diameter riser segment lowerable through a rotary of a drilling rig

#17
20190284900
2019-09-19

Valve device and method

#18
20190234167
2019-08-01

Method and apparatus for production well pressure containment for blowout

#19
20190055821
2019-02-21

ANTI-ALTERATION WELLHEAD VAULT

#20
20190010781
2019-01-10

Connection between an oil and gas fracturing tree and a zipper module

#21
20180371879
2018-12-27

Gravel packing system and method

#22
20180355683
2018-12-13

Packer box and method for installation or withdrawal of a packer element in, respectively from a packer box for use in petroleum drilling

#23
20180347287
2018-12-06

Simplified packer penetrator and method of installation

#24
20180291701
2018-10-11

Method for making controlled swell-rate swellable packer

#25
20180245416
2018-08-30

Large-width diameter riser segment lowerable through a rotary of a drilling rig

#26
20180073314
2018-03-15

MUD LIFT DRILLING SYSTEM USING EJECTOR ASSEMBLY IN MUD RETURN LINE

#27
20170370177
2017-12-28

Hydraulic tool

#28
20170335648
2017-11-23

Mat for wellhead cellar

#29
20170314356
2017-11-02

Well casing security device

#30
20170284170
2017-10-05

Riser annular isolation device

#31
20170247971
2017-08-31

Downhole sealing tool

#32
20170247970
2017-08-31

Large-width/diameter riser segment lowerable through a rotary of a drilling rig

#33
20170122054
2017-05-04

DRILL WASH DEVICE WITH PRE-MOUNTED EXCHANGE INSERT

#34
20160326842
2016-11-10

Anti-alteration wellhead vault

#35
20160326826
2016-11-10

Emergency power system for blowout preventer of a petroleum apparatus

#36
20160312558
2016-10-27

Safety mechanism for installation in soil-sampling tooling, with a system for blocking the escape of gas/oil in the stage of recovering the internal tube containing the specimen

#37
20160290094
2016-10-06

Hydraulic tool

#38
20160273295
2016-09-22

Lifting device and method

#39
20160237772
2016-08-18

Wellbore fluids comprising hydrated inorganic oxide materials and associated methods

#40
20160230490
2016-08-11

Well abandonment system and method

#41
20160153264
2016-06-02

Safety device for retrieving component within wellhead

#42
20160130933
2016-05-12

Computational model for tracking ball sealers in a wellbore

#43
20160090806
2016-03-31

Apparatus and methods for mechanically coupling a sealing system around the opening to cellar formed around a hydrocarbon exploration or production well

#44
20160060990
2016-03-03

Seal delivery system

#45
20150376969
2015-12-31

Removable orifice plate device

#46
20150308253
2015-10-29

ELECTRONICALLY MONITORING DRILLING CONDITIONS OF A ROTATING CONTROL DEVICE DURING DRILLING OPERATIONS

#47
20150184478
2015-07-02

Diverter assemblies and systems for forming seals around pipe elements and methods of using same

#48
20150136382
2015-05-21

Device for covering a pipeline from a wellbore

#49
20150101831
2015-04-16

Apparatus and methods for sealing around the opening to a cellar formed around a hydrocarbon exploration or production well

#50
20150075804
2015-03-19

Offshore universal riser system

#51
20150053424
2015-02-26

Fill up tool

#52
20150021043
2015-01-22

Safety device for retrieving component within wellhead

#53
20150007978
2015-01-08

Stuffing box leak containment apparatus

#54
20140367082
2014-12-18

Diverter flow line insert packer seal

#55
20140262278
2014-09-18

Method and Apparatus for Extracting Frozen Volatiles from Subsurface Regolith

#56
20140216718
2014-08-07

Frac adapter for wellhead

#57
20140216716
2014-08-07

Well cap assembly

#58
20140182859
2014-07-03

Process, device, and system to cap and seal oil and gas in a riser pipe

#59
20140158365
2014-06-12

Underwater device and method for blocking outflow of a fluid like oil or gas by an underwater well

#60
20140144648
2014-05-29

Connector

#61
20140124222
2014-05-08

APPARATUS AND METHOD FOR STRIPPING SOLIDS AND FLUIDS FROM A STRING USED IN DRILLING OR SERVICING WELLS

#62
20140076541
2014-03-20

Gas guzzler

#63
20130341014
2013-12-26

Method of placing ball sealers for fluid diversion

#64
20130192847
2013-08-01

Seal assemblies in subsea rotating control devices

#65
20130118756
2013-05-16

Method and device for emergency killing of an underwater oil/gas well

#66
20130048312
2013-02-28

Pipe end plug apparatus and method

#67
20120292107
2012-11-22

Offshore drilling method

#68
20120292106
2012-11-22

Offshore drilling method

#69
20120292054
2012-11-22

Offshore universal riser system

#70
20120292036
2012-11-22

Offshore universal riser system

#71
20120285697
2012-11-15

Offshore universal riser system

#72
20120285683
2012-11-15

Reducing or stopping the uncontrolled flow of fluid such as oil from a well

#73
20120273218
2012-11-01

Offshore drilling method

#74
20120273217
2012-11-01

CASING ANNULUS TESTER FOR DIAGNOSTICS AND TESTING OF A WELLBORE

#75
20120267118
2012-10-25

Offshore universal riser system

#76
20120199348
2012-08-09

Plugging a mined-through well

#77
20120097259
2012-04-26

Systems and Methods of Capping an Underwater Pipe

#78
20120088134
2012-04-12

Thermal battery for power systems

#79
20120060940
2012-03-15

Pre-fab pipe traverse plate assy

#80
20120055573
2012-03-08

Cap valve

#81
20120024538
2012-02-02

Christmas tree installation using coiled tubing injector

#82
20120003048
2012-01-05

DEVICES AND METHOD FOR EQUIPMENT FOUNDATION IN THE SEA BED

#83
20110315404
2011-12-29

Lubricating seal for use with a tubular

#84
20110278023
2011-11-17

Assembly for controlling annuli between tubulars

#85
20110259602
2011-10-27

CHRISTMAS TREE INSTALLATION USING COILED TUBING INJECTOR

#86
20110186305
2011-08-04

GAS-BLANKETED PIPING CONNECTIONS

#87
20110127045
2011-06-02

Method of sealing annular space between inner and outer upright tubes

#88
20110108278
2011-05-12

APPARATUS AND METHOD FOR STRIPPING SOLIDS AND FLUIDS FROM A STRING USED IN DRILLING OR SERVICING WELLS

#89
20110083852
2011-04-14

Frac adapter for wellhead

#90
20110073298
2011-03-31

ENVIRONMENTAL CONTAINMENT AND PROTECTION SYSTEM

#91
20100314128
2010-12-16

Method and apparatus for sealing and venting pressurized casings of gas wells

#92
20100252251
2010-10-07

Safety device for retrieving component within wellhead

#93
20100122813
2010-05-20

Method of placing ball sealers for fluid diversion

#94
20100116504
2010-05-13

Casing annulus tester for diagnostics and testing of a wellbore

#95
20100018715
2010-01-28

Offshore universal riser system

#96
20090223661
2009-09-10

SPLIT NON-WELDED CASING CAP FOR HIGH TEMPERATURE SERVICE

#97
20090211766
2009-08-27

System and method for capping abandoned wells

#98
20090020286
2009-01-22

Plugging a mined-through well

#99
20080230274
2008-09-25

Top drive washpipe system

#100
20080105434
2008-05-08

Offshore universal riser system

#101
20080083535
2008-04-10

Methods and apparatus for completion of well bores

#102
20080060816
2008-03-13

Wellhead seal unit

#103
20080060815
2008-03-13

Wellhead seal unit

#104
20070175628
2007-08-02

Post wellhead collar

#105
20070017680
2007-01-25

Conductor casing installation by anchor handling/tug/supply vessel

#106
20060131018
2006-06-22

Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore

#107
20060076135
2006-04-13

Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore

#108
20060016600
2006-01-26

Methods and systems for cementing wells that lack surface casing

#109
20050230106
2005-10-20

Method and apparatus for injecting packing into stuffing boxes for reciprocating rods

#110
20050115715
2005-06-02

Wellhead seal unit

#111
18126243
2023-10-03

Gas pump system

#112
14517546
2017-03-28

Apparatus for automatically lubricating an oil well sucker rod stuffing box

#113
14042386
2016-09-13

Dual rubber cartridge

#114
13670098
2015-09-01

Multifunction well plug dual locking elements