ClassID:

135487

E21B33/1204 - CPC Classification

Classification description:

Sealing or packing boreholes or wells in the borehole; Packers; Plugs permanent; drillable

Recent Application in this class:
#1
20260043306
2026-02-12

METHOD TO CONTROL A WELL

#2
20250382853
2025-12-18

Shear Resistant Swellable Packers

#3
20250354452
2025-11-20

HYBRID DISSOLVABLE PLUG WITH IMPROVED DRILLABILITY

#4
20250320790
2025-10-16

EUTECTIC ALLOY SYSTEM FOR CONCENTRIC CASING STRING CEMENT REPAIR

#5
20250075585
2025-03-06

PLUG AND ABANDON WITH FUSIBLE ALLOY SEAL

#6
20240410248
2024-12-12

CEMENT PLUG AND METHODS OF USE

#7
20240368960
2024-11-07

WELLBORE OPERATIONS SYSTEM AND METHOD

#8
20240287866
2024-08-29

Downhole well tool and method for permanently sealing a downhole well

#9
20240263537
2024-08-08

DOWNHOLE MILLABLE PERMANENT PLUG AND METHOD FOR SETTING A DOWNHOLE MILLABLE PERMANENT PLUG

#10
20240159126
2024-05-16

Gas-actuated dump bailer

#11
20240117711
2024-04-11

System and method for forming a permanent barrier in a well

#12
20240026748
2024-01-25

HYBRID DISSOLVABLE PLUG WITH IMPROVED DRILLABILITY

#13
20230399917
2023-12-14

Plug and abandon with fusible alloy seal

#14
20230220741
2023-07-13

METHOD FOR PREPARING A WELLBORE

#15
20230034797
2023-02-02

Dissolvable frac plug adapter, method for measuring dynamic downhole temperature, and method for fabricating dissolvable frac plug

#16
20220412185
2022-12-29

PandA setting with exothermic material

#17
20220412181
2022-12-29

Well tool device for forming a permanent barrier in a well

#18
20220403711
2022-12-22

Bore sealing method and apparatus

#19
20220372833
2022-11-24

Well tool device and method of forming a permanent well barrier, configured to generate a forced flow of molten mass

#20
20220349274
2022-11-03

Alternative casing cementing tool and methods thereof

#21
20220288658
2022-09-15

Hazardous material repository systems and methods

#22
20220275699
2022-09-01

Solid state lost circulation material

#23
20220205334
2022-06-30

Frac plug with rod plug

#24
20220145722
2022-05-12

Top down cement plug and method

#25
20220112784
2022-04-14

Cement plug fragmentation enhancement

#26
20220090463
2022-03-24

Downhole method and apparatus

#27
20220065055
2022-03-03

Method and apparatus to cure drilling losses with an electrically triggered lost circulation material

#28
20220018211
2022-01-20

Heat sources and alloys for use in down-hole applications

#29
20210381337
2021-12-09

DOWNHOLE ASSEMBLY FOR SELECTIVELY SEALING OFF A WELLBORE

#30
20210340840
2021-11-04

Cementing high-loss zones

#31
20210270100
2021-09-02

Variable flow diverter downhole tool

#32
20210140278
2021-05-13

Mechanical barriers for downhole degradation and debris control

#33
20210123321
2021-04-29

Transforming bridge-to-flow-through frac plug

#34
20210123318
2021-04-29

Drillable cementing plug

#35
20210108476
2021-04-15

Holding and crushing device for barrier plug

#36
20210054715
2021-02-25

Well operations with grouped particle diverter plug

#37
20210039193
2021-02-11

System and methodology for welding

#38
20210025259
2021-01-28

Tandem cement retainer and bridge plug

#39
20200391260
2020-12-17

Hazardous material repository systems and methods

#40
20200369552
2020-11-26

Methods of production of oil and gas service plugs

#41
20200366274
2020-11-19

P and A setting with exothermic material

#42
20200347693
2020-11-05

Multi-stage hydraulic fracturing tool and system

#43
20200248525
2020-08-06

Well operations with grouped particle diverter plug

#44
20200217173
2020-07-09

Downhole assembly for selectively sealing off a wellbore

#45
20200072008
2020-03-05

Setting tool having a ball carrying assembly

#46
20200056446
2020-02-20

Tandem cement retainer and bridge plug

#47
20200056444
2020-02-20

Method for sealing a region of open hole gravel pack

#48
20200032614
2020-01-30

Method of establishing a cement plug in an annular region between a first and a second casing

#49
20190338617
2019-11-07

Plug seat with enhanced fluid distribution and system

#50
20190301262
2019-10-03

Zonal isolation of a subterranean wellbore

#51
20190284928
2019-09-19

Communication systems and methods

#52
20190284898
2019-09-19

Tandem releasable bridge plug system and method for setting such tandem releasable plugs

#53
20190257193
2019-08-22

Downhole test tool and method of use

#54
20190226327
2019-07-25

Downhole test tool and method of use

#55
20190226311
2019-07-25

Methods and electrically-actuated apparatus for wellbore operations

#56
20190211646
2019-07-11

SLIP RING SEGMENT FOR DOWNHOLE TOOL

#57
20190186233
2019-06-20

P and A setting with exothermic material

#58
20190178049
2019-06-13

Plug and plug and abandonment system

#59
20190169951
2019-06-06

EXTENDED REACH PLUG HAVING DEGRADABLE ELEMENTS

#60
20190128091
2019-05-02

Apparatus for use in well abandonment

#61
20190063161
2019-02-28

HYBRID ROTARY CONE DRILL BIT

#62
20190055806
2019-02-21

Heat sources and alloys for use in down-hole applications

#63
20190032448
2019-01-31

Well tool device with a frangible disc

#64
20190032440
2019-01-31

WELL OPERATION TOOL AND METHODS FOR FORMING A PERMANENT WELL BARRIER

#65
20180363415
2018-12-20

Downhole assembly for selectively sealing off a wellbore

#66
20180327886
2018-11-15

Mixer for producing and solidifying an alloy in a subterranean reservoir

#67
20180258732
2018-09-13

DOWNHOLE OILFIELD DEVICE WITH SHEARABLE AND REMOVABLE COMPOSITE FASTENERS

#68
20180245421
2018-08-30

Holding and crushing device for barrier plug

#69
20180230769
2018-08-16

Downhole tools having controlled disintegration and applications thereof

#70
20180171741
2018-06-21

Wellbore plug isolation system and method

#71
20180171737
2018-06-21

Downhole assembly including degradable-on-demand material and method to degrade downhole tool

#72
20180171736
2018-06-21

Downhole assembly including degradable-on-demand material and method to degrade downhole tool

#73
20180142527
2018-05-24

Method and apparatus for plugging a well

#74
20180135398
2018-05-17

Safety system for autonomous downhole tool

#75
20180135370
2018-05-17

Drillable latching plug

#76
20180128073
2018-05-10

POWDER METAL GRIPPING ELEMENTS FOR SETTABLE DOWNHOLE TOOLS HAVING SLIPS

#77
20180087343
2018-03-29

Wellbore plug isolation system and method

#78
20180085850
2018-03-29

System and methodology for welding

#79
20180073322
2018-03-15

Downhole tool and system, and method of use

#80
20180066496
2018-03-08

Drillable Oilfield Tubular Plug

#81
20180058174
2018-03-01

Short millable plug for hydraulic fracturing operations

#82
20180045024
2018-02-15

High power laser decommissioning of multistring and damaged wells

#83
20180045017
2018-02-15

Slip Assembly for Anchoring Downhole Plugs and Retainers

#84
20180010413
2018-01-11

Plug of extended reach

#85
20170362912
2017-12-21

Frac plug with retention mechanism

#86
20170314363
2017-11-02

Downhole assembly for selectively sealing off a wellbore

#87
20170306718
2017-10-26

Wound composite core for molded components

#88
20170268320
2017-09-21

Methods and electrically-actuated apparatus for wellbore operations

#89
20170268311
2017-09-21

Frac plug system having bottom sub geometry for improved flow back, milling and/or setting

#90
20170241233
2017-08-24

Extended reach plug

#91
20170145797
2017-05-25

Assembly and method for expanding a tubular element

#92
20170130536
2017-05-11

SHOE FOR A TUBULAR ELEMENT IN A WELLBORE

#93
20170016304
2017-01-19

Well barrier method and apparatus

#94
20170009546
2017-01-12

One trip tubular cutting and milling down tube and associated collars

#95
20160369588
2016-12-22

Downhole tool having a mandrel with a relief point

#96
20160333659
2016-11-17

Method of placing cement sealing rings at predetermined annular locations around a tubular string

#97
20160326828
2016-11-10

Drill hole plug with anchoring grooves and at least one sealing groove

#98
20160312557
2016-10-27

Disintegrating expand in place barrier assembly

#99
20160298413
2016-10-13

Settable well tool method

#100
20160290095
2016-10-06

Packer assembly with wing projection slips

#101
20160273300
2016-09-22

Degradable wellbore isolation devices with varying degradation rates

#102
20160265305
2016-09-15

Downhole system for use in a wellbore and method for the same

#103
20160194937
2016-07-07

Method for establishment of a new well path from an existing well

#104
20160153241
2016-06-02

Method for drilling out a plug using a hybrid rotary cone drill bit

#105
20160145962
2016-05-26

Apparatus for use in well abandonment

#106
20160047196
2016-02-18

Wellbore plug isolation system and method

#107
20150376978
2015-12-31

Millable plugging device

#108
20150368542
2015-12-24

System and method of using heat sources and alloys in down-hole applications

#109
20150361756
2015-12-17

Bottom set downhole plug

#110
20150345248
2015-12-03

Apparatus for use in well abandonment

#111
20150285022
2015-10-08

Multi-piece molded composite mandrel and methods of manufacturing

#112
20150211322
2015-07-30

Well sealing via thermite reactions

#113
20150176366
2015-06-25

Non-metallic slip assembly and related methods

#114
20150152708
2015-06-04

Laser Plug and Abandon Method

#115
20150101812
2015-04-16

Milling system for abandoning a wellbore

#116
20150090462
2015-04-02

Fluid vent assembly and method of venting fluid

#117
20150068729
2015-03-12

Composite slips for a frac plug

#118
20150060047
2015-03-05

ELASTOMERIC BALL SEAT FOR A FRAC PLUG

#119
20150053405
2015-02-26

One trip perforating and washing tool for plugging and abandoning wells

#120
20150034317
2015-02-05

Method of well operation

#121
20150021042
2015-01-22

Drillable plug

#122
20150007991
2015-01-08

Method of providing mechanical stability around an entrance of a new well path to be formed from an existing well

#123
20140338908
2014-11-20

Cementing whipstock apparatus and methods

#124
20140311752
2014-10-23

Downhole plug apparatus

#125
20140290946
2014-10-02

Big gap element sealing system

#126
20140251594
2014-09-11

Millable Fracture Balls Composed of Metal

#127
20140224505
2014-08-14

Runnable member catcher, system and method of removing same

#128
20140216744
2014-08-07

Method of intersecting a first well bore by a second well bore

#129
20140166317
2014-06-19

Millable bridge plug system

#130
20140166283
2014-06-19

Millable bridge plug system

#131
20140131035
2014-05-15

Safety system for autonomous downhole tool

#132
20140110123
2014-04-24

Wellbore isolation device made from a powdered fusible alloy matrix

#133
20140090846
2014-04-03

High power laser decomissioning of multistring and damaged wells

#134
20140060812
2014-03-06

Standoff device for downhole tools using slip elements

#135
20140020911
2014-01-23

Downhole tool system and method related thereto

#136
20130333901
2013-12-19

Downhole seal element of changing elongation properties

#137
20130264056
2013-10-10

Multizone frac system

#138
20130220609
2013-08-29

Hard bottom cement seal for improved well control

#139
20130146167
2013-06-13

Molded composite mandrel for a downhole zonal isolation tool

#140
20130112412
2013-05-09

Settable well tool and method

#141
20130105158
2013-05-02

Method and device for sealing a well by means of a core plug, plug for implementing the method, and extractor tool designed to remove it

#142
20120298359
2012-11-29

Sealing method and apparatus

#143
20120292052
2012-11-22

Easy drill slip

#144
20120292014
2012-11-22

Packer supported on bonded connection to a surrounding tubular

#145
20120255723
2012-10-11

DRILLABLE SLIP WITH NON-CONTINUOUS OUTER DIAMETER

#146
20120247775
2012-10-04

Downhole tool with pumpable section

#147
20120199340
2012-08-09

Consumable downhole tool

#148
20120160478
2012-06-28

High strength dissolvable structures for use in a subterranean well

#149
20120145379
2012-06-14

Bottom set downhole plug

#150
20120145378
2012-06-14

Bottom set downhole plug

#151
20120125642
2012-05-24

Convertible multi-function downhole isolation tool and related methods

#152
20120125637
2012-05-24

Non-metallic slip assembly and related methods

#153
20120097384
2012-04-26

Drillable slip with buttons and cast iron wickers

#154
20120067596
2012-03-22

RETRIEVABLE BRIDGE PLUG

#155
20110308819
2011-12-22

Hydraulicaly fracturable downhole valve assembly and method for using same

#156
20110284153
2011-11-24

Method of making a molded composite mandrel

#157
20110277987
2011-11-17

Bottom set downhole plug

#158
20110259610
2011-10-27

High pressure and high temperature ball seat

#159
20110247833
2011-10-13

High strength dissolvable structures for use in a subterranean well

#160
20110088891
2011-04-21

Ultra-short slip and packing element system

#161
20110024134
2011-02-03

Expansion device

#162
20110017471
2011-01-27

Downhole valve assembly

#163
20090321087
2009-12-31

EXPANDABLE PLUG

#164
20090242188
2009-10-01

Downhole isolation tool

#165
20090139720
2009-06-04

Downhole valve assembly

#166
20090038790
2009-02-12

Downhole tool with slip elements having a friction surface

#167
20090011247
2009-01-08

Molded Composite Mandrel for a Downhole Zonal Isolation Tool

#168
20090000792
2009-01-01

Retrievable bridge plug

#169
20080308266
2008-12-18

Drillable bridge plug

#170
20070246224
2007-10-25

Offset valve system for downhole drillable equipment

#171
20070204986
2007-09-06

Millable pre-installed plug

#172
20070102165
2007-05-10

Self centralizing non-rotational slip and cone system for downhole tools

#173
20060124307
2006-06-15

Retrievable bridge plug

#174
20050199307
2005-09-15

Sealing method and apparatus

#175
20050189103
2005-09-01

Drillable bridge plug

#176
20050121201
2005-06-09

Retrievable bridge plug

#177
20050034876
2005-02-17

Expandable packer with anchoring feature

#178
18746256
2025-12-16

Shear resistant swellable packers

#179
15466952
2019-06-04

Downhole bridge plugs reinforcing rings and reinforcing ring fabrication methods

#180
14575324
2017-09-05

Well remediation method and apparatus

#181
13469937
2015-04-07

Downhole tool with fluted anvil

#182
13401997
2015-04-07

Cap assembly for use with a tubing spool of a wellhead