ClassID:

135548

E21B36/008 - CPC Classification

Classification description:

Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using chemical heat generating means

Recent Application in this class:
#1
20260055681
2026-02-26

PRE-POSITIONING A MELTABLE SEAL FOR PLUG AND ABANDONMENT

#2
20260022618
2026-01-22

APPARATUS AND METHODS FOR FORMING FORMATION-TO-FORMATION SEALS IN A WELLBORE

#3
20250277417
2025-09-04

BRADENHEAD PRESSURE ABATEMENT SYSTEM (BPAS) AND METHOD

#4
20250257632
2025-08-14

FUGITIVE GAS REMEDIATION (FGR) SYSTEM WITH MONITORING

#5
20250243739
2025-07-31

Systems and Methods of Initiating Energetic Reactions for Reservoir Stimulation

#6
20250198256
2025-06-19

DOWNHOLE HEATING

#7
20250179901
2025-06-05

EXTRACTION AND INTEGRATION OF WASTE HEAT FROM ENHANCED GEOLOGIC HYDROGEN PRODUCTION

#8
20250122774
2025-04-17

ALL METAL-TO-METAL CASING PATCH

#9
20250101841
2025-03-27

In-reservoir cleanup operations through exothermic reaction following a fracturing operation

#10
20250075585
2025-03-06

PLUG AND ABANDON WITH FUSIBLE ALLOY SEAL

#11
20250067144
2025-02-27

Methods for Shortening Waiting-On-Cement Time in a Subterranean Well

#12
20250034963
2025-01-30

GAS-GENERATING CHEMICAL HEATING MIXTURES AND DOWNHOLE TOOL ASSEMBLIES WITH CHEMICAL HEATERS EMPLOYING SUCH

#13
20250012167
2025-01-09

METHOD FOR PROVIDING A PERMANENT BARRIER IN A WELL

#14
20250003298
2025-01-02

RETRIEVABLE DOWNHOLE HEATER

#15
20240368451
2024-11-07

Gel formation from reaction heating

#16
20240318524
2024-09-26

TOOL FOR METAL PLUGGING OR SEALING OF CASING

#17
20240301769
2024-09-12

ACTUATOR, METHOD, AND SYSTEM

#18
20240295157
2024-09-05

ANNULAR BARRIER

#19
20240263537
2024-08-08

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

#20
20240228400
2024-07-11

CHEMICAL HEAT SOURCES FOR USE IN DOWN-HOLE OPERATIONS

#21
20240159126
2024-05-16

Gas-actuated dump bailer

#22
20240151129
2024-05-09

Systems and methods of initiating energetic reactions for reservoir stimulation

#23
20240141754
2024-05-02

Pre-positioning a meltable seal for plug and abandonment

#24
20240141753
2024-05-02

DOWNHOLE PRESSURE EQUALIZER

#25
20240117711
2024-04-11

System and method for forming a permanent barrier in a well

#26
20240117703
2024-04-11

Method for providing a permanent barrier in a well

#27
20240102360
2024-03-28

IMPROVEMENTS RELATING TO DOWNHOLE HEATER ASSEMBLIES AND METHODS OF OPERATING SUCH

#28
20240076964
2024-03-07

System, Method and Apparatus for Creating Electrolysis

#29
20240076956
2024-03-07

ONE TRIP SYSTEM TO SET AN ALLOY SEAL AND MILL THROUGH

#30
20240068328
2024-02-29

Exothermic drilling fluid composition and method of use

#31
20240060396
2024-02-22

Zero Emission Blow Down System and Method

#32
20240011367
2024-01-11

Downhole apparatus and method comprising compacted thermite

#33
20240003222
2024-01-04

Methods for shortening waiting-on-cement time in a subterranean well

#34
20230417121
2023-12-28

SINGLE TRIP ANNULAR SEAL REPAIR METHOD AND ASSOCIATED EQUIPMENT

#35
20230399917
2023-12-14

Plug and abandon with fusible alloy seal

#36
20230392485
2023-12-07

Extraction and integration of waste heat from enhanced geologic hydrogen production

#37
20230358113
2023-11-09

Down-hole chemical heater and methods of operating such

#38
20230349264
2023-11-02

METHODS TO REPAIR WELL LINER HANGERS

#39
20230287756
2023-09-14

Plug with composite ends and method of forming and using

#40
20230272694
2023-08-31

Exothermic and/or gas-generating treatment for subterranean and pipeline operations

#41
20230265741
2023-08-24

DOWNHOLE HEATING TOOLS WITH INCREASED HEATING CAPACITY AND ASSOCIATED TOOLS AND METHODS

#42
20230243234
2023-08-03

BISMUTH METHOD OF ABANDONING A WELL

#43
20230160277
2023-05-25

Method and apparatus for plugging

#44
20220412185
2022-12-29

PandA setting with exothermic material

#45
20220307343
2022-09-29

Tool for metal plugging or sealing of casing

#46
20220275706
2022-09-01

Downhole retainer

#47
20220259945
2022-08-18

DEVICE FOR TREATING A BOTTOM-HOLE FORMATION WELLBORE

#48
20220220361
2022-07-14

Thermochemical composition for well cleanup

#49
20220220360
2022-07-14

Downhole exothermic reaction well bore wall clean up method

#50
20220205342
2022-06-30

Downhole method and apparatus

#51
20220145726
2022-05-12

THERMITE METHOD OF ABANDONING A WELL

#52
20220098974
2022-03-31

System and method for downhole monitoring of fluid flow

#53
20220025730
2022-01-27

Downhole well tools and methods of using such

#54
20220018211
2022-01-20

Heat sources and alloys for use in down-hole applications

#55
20220018201
2022-01-20

CASING ANNULUS LEAKAGE REPAIR METHOD AND SYSTEM

#56
20220010649
2022-01-13

Removable plugging method and apparatus

#57
20210404283
2021-12-30

Downhole fishing tool

#58
20210348472
2021-11-11

Borehole junction support by consolidation of formation materials

#59
20210340425
2021-11-04

Terpene-based spotting fluid compositions for differential sticking

#60
20210310344
2021-10-07

Removal of water blockage in tight gas reservoir using thermochemical fluids

#61
20210207466
2021-07-08

Systems and methods of initiating energetic reactions for reservoir stimulation

#62
20210164321
2021-06-03

Downhole tool deployment assembly with improved heater removability and methods of employing such

#63
20210115760
2021-04-22

Methods for increasing wellbore strength

#64
20210115322
2021-04-22

Combined thermochemical and chelating agents useful for well cleanup

#65
20200381403
2020-12-03

Tool for metal plugging or sealing of casing

#66
20200366274
2020-11-19

P and A setting with exothermic material

#67
20200347696
2020-11-05

Combined well plug/chemical heater assemblies for use in down-hole operations and associated heater cartridges

#68
20200182008
2020-06-11

Methods and apparatus for use in oil and gas well completion

#69
20200173250
2020-06-04

A DOWNHOLE TOOL DEPLOYMENT ASSEMBLY WITH IMPROVED HEATER REMOVABILITY AND METHODS OF EMPLOYING SUCH

#70
20200056443
2020-02-20

Downhole fishing tool

#71
20200048527
2020-02-13

In-situ generation of glass-like materials inside subterranean formation

#72
20190249524
2019-08-15

Methods for hanging liner from casing and articles derived therefrom

#73
20190249517
2019-08-15

Systems and methods for remediating a microannulus in a wellbore

#74
20190195053
2019-06-27

System, method and apparatus for creating an electrical glow discharge

#75
20190186233
2019-06-20

P and A setting with exothermic material

#76
20190186230
2019-06-20

Downhole operations relating to open hole gravel packs and tools for use therein

#77
20190185739
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#78
20190185738
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#79
20190185737
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#80
20190145223
2019-05-16

Methods for increasing wellbore strength

#81
20190144355
2019-05-16

Chemical heat sources for use in down-hole operations

#82
20190128091
2019-05-02

Apparatus for use in well abandonment

#83
20190093475
2019-03-28

Real-time fluid monitoring system and method

#84
20190093451
2019-03-28

REDUCING WATER PERMEABILITY IN SUBTERRANEAN FORMATIONS USING PETROLEUM PRODUCTS

#85
20190085659
2019-03-21

Down-hole chemical heater and methods of operating such

#86
20190071959
2019-03-07

Producing pressurized and heated fluids using a fuel cell

#87
20190055806
2019-02-21

Heat sources and alloys for use in down-hole applications

#88
20180371859
2018-12-27

Ignitor, system and method of electrical ignition of exothermic mixture

#89
20180363856
2018-12-20

Protecting a fluid stream from fouling

#90
20180362827
2018-12-20

In-situ generation of glass-like materials inside subterranean formation

#91
20180320494
2018-11-08

Method of producing heavy oil using a fuel cell

#92
20180320054
2018-11-08

Compositions and methods for enhanced fracture cleanup using redox treatment

#93
20180298720
2018-10-18

Systems and methods for remediating a microannulus in a wellbore

#94
20180274333
2018-09-27

System and method for sealing multilateral junctions

#95
20180273829
2018-09-27

SAND CONSOLIDATION WITH PETROLEUM PRODUCTS

#96
20180148991
2018-05-31

Tool for metal plugging or sealing of casing

#97
20180066489
2018-03-08

Wellbore plug and abandonment

#98
20170349819
2017-12-07

Enhanced oil recovery by in-situ steam generation

#99
20170321520
2017-11-09

Protecting a fluid stream from fouling using a phase change material

#100
20170241214
2017-08-24

TOOL RELEASE DEVICE

#101
20170226819
2017-08-10

Downhole well tools and methods of using such

#102
20170226401
2017-08-10

Terpene-Based Spotting Fluid Compositions for Differential Sticking

#103
20170211360
2017-07-27

System, method and apparatus for creating an electrical glow discharge

#104
20170198562
2017-07-13

Igniting underground energy sources using propellant torch

#105
20170089168
2017-03-30

Controlled heat source based down-hole plugging tools and applications

#106
20170081950
2017-03-23

Thermal conditioning of fishbone well configurations

#107
20170047598
2017-02-16

Oilfield electricity and heat generation systems and methods

#108
20170030162
2017-02-02

Well casing/tubing disposal

#109
20170022786
2017-01-26

Methanol Storage and Delivery Apparatus for Gas Wells

#110
20160319633
2016-11-03

Methods of deployment for eutectic isolation tools to ensure wellbore plugs

#111
20160312572
2016-10-27

Well sealing via thermite reactions

#112
20160298433
2016-10-13

Heater and supporting structure thereof

#113
20160208590
2016-07-21

Heater and method of operating

#114
20160145962
2016-05-26

Apparatus for use in well abandonment

#115
20160108702
2016-04-21

METHOD AND DEVICE FOR RECOVERING OIL

#116
20160010441
2016-01-14

Process for producing natural gas and natural gas condensate from underground gas condensate deposits

#117
20150368542
2015-12-24

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

#118
20150345248
2015-12-03

Apparatus for use in well abandonment

#119
20150292298
2015-10-15

Geothermic heater system

#120
20150247395
2015-09-03

Free-Flowing Aqueous Compositions And Processes For Enhancing The Production Rate Of Mineral Oil And/Or Natural Gas From An Underground Deposit Comprising Mineral Oil And/Or Natural Gas

#121
20150211322
2015-07-30

Well sealing via thermite reactions

#122
20150204172
2015-07-23

Heater and method of operating

#123
20150198025
2015-07-16

System and method of producing oil

#124
20150175879
2015-06-25

Tight gas stimulation by in-situ nitrogen generation

#125
20150162637
2015-06-11

Heater and method of operating

#126
20150140463
2015-05-21

Heater with a fuel cell stack assembly and a combustor and method of operating

#127
20150136390
2015-05-21

EXTRACTING OIL FROM UNDERGROUND RESERVOIRS

#128
20150075768
2015-03-19

Well tools operable via thermal expansion resulting from reactive materials

#129
20150064594
2015-03-05

Heater and supporting structure thereof

#130
20150064592
2015-03-05

Heater and method of operating

#131
20150064591
2015-03-05

HEATER AND METHOD OF OPERATING

#132
20150060061
2015-03-05

Heater and method of operating

#133
20150034317
2015-02-05

Method of well operation

#134
20150000912
2015-01-01

In-situ downhole heating for a treatment in a well

#135
20140345851
2014-11-27

Well tools operable via thermal expansion resulting from reactive materials

#136
20140318798
2014-10-30

System and method for subsea structure obstruction remediation using an exothermic chemical reaction

#137
20140318791
2014-10-30

System and method for subsea structure obstruction remediation using an exothermic chemical reaction

#138
20140318790
2014-10-30

SYSTEM AND METHOD FOR SUBSEA STRUCTURE OBSTRUCTION REMEDIATION USING AN EXOTHERMIC CHEMICAL REACTION

#139
20140318789
2014-10-30

System and method for subsea structure obstruction remediation using an exothermic chemical reaction

#140
20140151045
2014-06-05

Increasing formation strength through the use of temperature and temperature coupled particulate to increase near borehole hoop stress and fracture gradients

#141
20140090839
2014-04-03

Enhanced oil recovery by in-situ steam generation

#142
20130319662
2013-12-05

Systems and Methods For Hydrotreating A Shale Oil Stream Using Hydrogen Gas That Is Concentrated From The Shale Oil Stream

#143
20130284442
2013-10-31

Heat treatment for removal of bauschinger effect or to accelerate cement curing

#144
20130206413
2013-08-15

Gas evolving oil viscosity diminishing compositions for stimulating the productive layer of an oil reservoir

#145
20130104596
2013-05-02

Self-priming pump

#146
20130081815
2013-04-04

Enhancing swelling rate for subterranean packers and screens

#147
20130043029
2013-02-21

HIGH VOLTAGE TEMPERATURE LIMITED HEATERS

#148
20120255742
2012-10-11

Borehole metal member bonding system and method

#149
20110209869
2011-09-01

Method and apparatus to release energy in a well

#150
20110203797
2011-08-25

Gas evolving oil viscosity diminishing compositions for stimulating the productive layer of an oil reservoir

#151
20110174504
2011-07-21

Well tools operable via thermal expansion resulting from reactive materials

#152
20110174484
2011-07-21

Well tools operable via thermal expansion resulting from reactive materials

#153
20110132609
2011-06-09

Formation fluid sampling tools and methods utilizing chemical heating

#154
20110079380
2011-04-07

Subsurface well completion system having a heat exchanger

#155
20100139924
2010-06-10

Method and apparatus for removing plugs from subsea equipment through the use of exothermic reacting chemicals

#156
20100116170
2010-05-13

Cement compositions comprising crystalline organic materials and methods of using same

#157
20100006287
2010-01-14

Device for the thermal stimulation of gas hydrate formations

#158
20090223678
2009-09-10

Heat generator for screen deployment

#159
20090200032
2009-08-13

System, method and apparatus for creating an electrical glow discharge

#160
20090145602
2009-06-11

Cement compositions comprising crystalline organic materials and methods of using same

#161
20080217058
2008-09-11

Heating device for passage through subterranean asphalt and method of use

#162
20080069961
2008-03-20

Methods and compositions for thermally treating a conduit used for hydrocarbon production or transmission to help remove paraffin wax buildup

#163
20080067108
2008-03-20

Methods and compositions for thermally treating a conduit used for hydrocarbon production or transmission to help remove paraffin wax buildup

#164
20080066904
2008-03-20

Formation fluid sampling tools and methods utilizing chemical heating

#165
20080066784
2008-03-20

Methods and compositions for thermally treating a conduit used for hydrocarbon production or transmission to help remove paraffin wax buildup

#166
20080053655
2008-03-06

Downhole steam generator

#167
20060081374
2006-04-20

Process for downhole heating

#168
20060070732
2006-04-06

Process and device for the thermal stimulation of gas hydrate formations

#169
20060037749
2006-02-23

Well tool and method for heating and depositing first and second charges of selective temperature melting metal alloys for repairing failure spots along a section of a tubular conduit in a subterranean well

#170
20060037748
2006-02-23

Subterranean well secondary plugging tool for repair of a first plug

#171
20050006097
2005-01-13

Variable frequency temperature limited heaters

#172
18180530
2024-06-11

Thermochemical fluid injection to prevent cool front invasion in COgeothermal reservoirs

#173
17305475
2022-11-22

Temporary wellbore barrier using ferromagnetic fluid