ClassID:

135630

E21B43/166 - CPC Classification

Classification description:

Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells; Enhanced recovery methods for obtaining hydrocarbons Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium

Sub-classes:
Recent Application in this class:
#1
20260098462
2026-04-09

Methods for Hydrocarbon Recovery from Unconventional Formations

#2
20260085702
2026-03-26

COMPRESSION OR PUMPING DEVICE COMPRISING A MEANS OF REDUCING THE TANGENTIAL VELOCITY OF THE CLEARANCE FLOW

#3
20260078657
2026-03-19

SYNERGISTIC EFFECTS OF NANOPARTICLES AND SURFACTANTS FOR GAS LIFT FLOW IMPROVEMENT

#4
20250129695
2025-04-24

SYSTEM AND METHOD FOR ENHANCED OIL RECOVERY UTILIZING ALTERNATING STACKED LIQUID AND GAS SLUGS

#5
20250122421
2025-04-17

COMPOSITIONS AND METHODS FOR PRESSURE PROTECTION

#6
20250115804
2025-04-10

AI ASSISTED NANOFLUIDS CO2 WAG

#7
20250059862
2025-02-20

SMART PRESSURE DRIVEN AUTOMATED FLUID INJECTION MANAGEMENT SYSTEM AND METHOD

#8
20250012177
2025-01-09

Subterranean storage of hydrogen foams

#9
20240401446
2024-12-05

SYNERGISTIC EFFECTS OF NANOPARTICLES AND SURFACTANTS FOR GAS LIFT FLOW IMPROVEMENT

#10
20240384158
2024-11-21

COMPOSITIONS AND METHODS FOR FOAM STIMULATION

#11
20240328921
2024-10-03

METHOD FOR DETERMINING EFFECTIVE STORAGE CAPACITY OF GAS STORAGE RECONSTRUCTED FROM WATER-FLOODED VOLATILE OIL RESERVOIR

#12
20240240548
2024-07-18

SELF-GENERATING HEAT PROCESS FOR IN-SITU CONVERSION OF MEDIUM-LOW MATURE AND ORGANIC-RICH SHALE

#13
20240151124
2024-05-09

Method for expanding the capacity for local storage of chemical products or their solutions in reservoir rock

#14
20240018856
2024-01-18

METHODOLOGY FOR DESIGN AND OPERATIONS OF FIELD-WIDE AND MULTI-WELL ENHANCED OIL RECOVERY OF UNCONVENTIONAL HYDROCARBON ASSETS

#15
20230265753
2023-08-24

GAS BLEND OPTIMIZER

#16
20230258282
2023-08-17

Gas flow control valve and mounting method for gas flow control valve

#17
20230203918
2023-06-29

Oil recovery method integrated with the capture, utilization and storage of CO2 through a cavern in saline rock

#18
20230184072
2023-06-15

Methods for foam and gel injections into a well and enhanced foaming and gelations techniques

#19
20230183562
2023-06-15

Compositions and methods for pressure protection

#20
20230151720
2023-05-18

System and method for enhanced oil recovery utilizing alternating stacked liquid and gas slugs

#21
20230095183
2023-03-30

Diffusion flux inclusion for a reservoir simulation for hydrocarbon recovery

#22
20230087720
2023-03-23

Fluid storage and production

#23
20230084576
2023-03-16

Compositions and methods for pressure protection

#24
20220356392
2022-11-10

Foaming formulations for enhanced oil recovery

#25
20220316305
2022-10-06

Method for integral profile control and plugging of water encroachment and steam channeling of heavy oil reservoir with edge and bottom water

#26
20220195855
2022-06-23

Method and apparatus for thermal fluid generation for use in enhanced oil recovery

#27
20220186595
2022-06-16

Integrated method for nitrogen-assisted carbon dioxide fracturing and development of shale oil reservoirs

#28
20220145167
2022-05-12

Foaming compositions for enhanced oil recovery

#29
20220090473
2022-03-24

Treatment of subterranean formations

#30
20220081608
2022-03-17

Enhancing foam rheological properties using water-soluble thickener

#31
20210396109
2021-12-23

Method and system for mixing liquid and gas that have been separately injected into a well comprising two coaxial cylinders and discharging the liquid/gas mixture into an underground formation

#32
20210380870
2021-12-09

Y-grade NGL fluids for enhanced oil recovery

#33
20210380869
2021-12-09

Method for modifying well injection profile and enhanced oil recovery

#34
20210363867
2021-11-25

Methods for producing hydrocarbons from thin, heterogenous pay reservoirs using vertically coplanar injection and production wells with a transverse pressure gradient

#35
20210355369
2021-11-18

ENHANCING FOAM RHEOLOGICAL PROPERTIES USING WATER-SOLUBLE THICKENER

#36
20210348489
2021-11-11

Chemical injection system for completed wellbores

#37
20210348462
2021-11-11

Chemical injection system for completed wellbores

#38
20210277757
2021-09-09

Pressure assisted oil recovery

#39
20210002991
2021-01-07

Methods for pressure protection using a gas

#40
20210002990
2021-01-07

Methods for improving hydrocarbon production from an unconventional subterranean formation

#41
20210002544
2021-01-07

Methods for pressure protection using a foamed pressure protection composition

#42
20210002444
2021-01-07

Methods for foam stimulation

#43
20200399528
2020-12-24

Stabilized foams with tailored water chemistry for mobility control in gas injection processes

#44
20200392823
2020-12-17

Underwater system and method for pressurization of an underwater oil reservoir by independent injection of water and gas

#45
20200392802
2020-12-17

Multi-component downhole treatment

#46
20200370404
2020-11-26

Foam from low cost petroleum sulfonate surfactants for fracturing along with wettability alteration

#47
20200369949
2020-11-26

3 in 1 foam formulation for enhanced oil recovery including conformance control, ultra-low interfacial tension, and wettability alteration

#48
20200347708
2020-11-05

EXTRACTION METHODS AND SYSTEMS FOR RECOVERY OF OIL FROM RESERVOIRS CONTAINING MOBILE WATER

#49
20200291754
2020-09-17

Hydrate solid-state fluidization mining method and system under underbalanced reverse circulation condition

#50
20200256172
2020-08-13

Pump system for gas entrainment

#51
20200190952
2020-06-18

Subsea system and method for pressurization of a subsea oil reserve by injecting at least one of water and gas

#52
20200172795
2020-06-04

Stabilized foams with tailored water chemistry for mobility control in gas injection processes

#53
20200123886
2020-04-23

Optimized foam application for hydrocarbon well stimulation

#54
20200102490
2020-04-02

Y-grade NGL fluids for enhanced oil recovery

#55
20200072031
2020-03-05

System and method of performing oil displacement by water-gas dispersion system

#56
20200056089
2020-02-20

Hydrocarbon recovery using complex water and carbon dioxide emulsions

#57
20200018141
2020-01-16

Use of natural gas for well enhancement

#58
20190390539
2019-12-26

Pressure assisted oil recovery

#59
20190352557
2019-11-21

Hydrocarbon recovery using complex water and carbon dioxide emulsions

#60
20190330966
2019-10-31

Method and apparatus for thermal fluid generation for use in enhanced oil recovery

#61
20190300912
2019-10-03

BIOLOGICALLY ENHANCED OIL RECOVERY METHODS

#62
20190271212
2019-09-05

Diffusion flux inclusion for a reservoir simulation for hydrocarbon recovery

#63
20190264097
2019-08-29

Treating a formation with a chemical agent and liquefied natural gas (LNG) de-liquefied at a wellsite

#64
20190226309
2019-07-25

Intermittent fracture flooding process

#65
20190226308
2019-07-25

Methods and systems for recovering oil from subterranean reservoirs

#66
20190218895
2019-07-18

Selective diffusion inclusion for a reservoir simulation for hydrocarbon recovery

#67
20190186247
2019-06-20

Alternating Liquid Gas Fracturing for Enhanced Oil Recovery of Well

#68
20190162062
2019-05-30

Oxidizing agent injection equipment for underground coal gasification process and application thereof

#69
20190136678
2019-05-09

Gas diverter for well and reservoir stimulation

#70
20190120034
2019-04-25

PVDF pipe and methods of making and using same

#71
20190119559
2019-04-25

PREFORMED PARTICLE GEL FOR ENHANCED OIL RECOVERY

#72
20190112905
2019-04-18

Mobile Gas Compression System for Well Stimulation

#73
20190071957
2019-03-07

Extraction methods and systems for recovery of oil from reservoirs containing mobile water

#74
20190055825
2019-02-21

Unconventional reservoir enhanced or improved oil recovery

#75
20190055824
2019-02-21

Systems and methods of optimizing Y-grade NGL enhanced oil recovery fluids

#76
20190055461
2019-02-21

Systems and methods of optimizing Y-Grade NGL unconventional reservoir stimulation fluids

#77
20190013756
2019-01-10

System and method for a stoichiometric exhaust gas recirculation gas turbine system

#78
20190010795
2019-01-10

Methods for deep reservoir stimulation using acid-forming fluids

#79
20180340404
2018-11-29

Multi-directional enhanced oil recovery (MEOR) method

#80
20180305607
2018-10-25

Hydrocarbon recovery using complex water and carbon dioxide emulsions

#81
20180305606
2018-10-25

Hydrocarbon recovery using complex water and carbon dioxide emulsions

#82
20180291720
2018-10-11

Compositions and methods for controlled delivery of acid

#83
20180265769
2018-09-20

Use of natural gas as a vaporizing gas in a well intervention operation

#84
20180238153
2018-08-23

Use of gaseous phase natural gas as a carrier fluid during a well intervention operation

#85
20180223638
2018-08-09

Method for developing a hydrocarbon reservoir by injecting a gas in the form of foam

#86
20180174247
2018-06-21

A Method of Generating a Production Strategy for the Development of a Reservoir of Hydrocarbon in a Natural Environment

#87
20180163522
2018-06-14

Fluid injection system

#88
20180073336
2018-03-15

Nanogas flooding of subterranean formations

#89
20180058182
2018-03-01

Y-grade NGL fluids for enhanced oil recovery

#90
20180057732
2018-03-01

Unconventional enhanced oil recovery

#91
20180030817
2018-02-01

Method for operating a hydrocarbon deposit by injection of a gas in foam form

#92
20170283688
2017-10-05

Self-sourced reservoir fluid for enhanced oil recovery

#93
20170260842
2017-09-14

Low frequency distributed acoustic sensing

#94
20170247994
2017-08-31

Thermally Assisted Oil Production Wells

#95
20170242410
2017-08-24

System and method for generating a schedule to extract a resource fluid from a reservoir

#96
20170241248
2017-08-24

Method of thermobaric production of hydrocarbons

#97
20170226834
2017-08-10

Intermittent fracture flooding process

#98
20170226833
2017-08-10

Multi-directional enhanced oil recovery (MEOR) method

#99
20170218262
2017-08-03

Fly ash microspheres for use in subterranean formation operations

#100
20170211354
2017-07-27

Connection system for subsea flow interface equipment

#101
20170175506
2017-06-22

Pressure assisted oil recovery

#102
20170175493
2017-06-22

Estimation of oil recovery in foam flooded hydrocarbon reservoirs

#103
20170145800
2017-05-25

ENHANCED RECOVERY METHOD AND APPARATUS

#104
20170138146
2017-05-18

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#105
20170074082
2017-03-16

Variable rate steam injection, including via solar power for enhanced oil recovery, and associated systems and methods

#106
20170067331
2017-03-09

Recovery from a hydrocarbon reservoir

#107
20170067330
2017-03-09

Recovery from a hydrocarbon reservoir

#108
20170051595
2017-02-23

Method of microbially assisted water alternating gas injection as a means of enhanced oil recovery by supplementing the immiscible water injection cycle with nutrients to improve oil release in oil-containing rock formations

#109
20170044425
2017-02-16

Stability improvement of COfoam for enhanced oil recovery applications using polyelectrolytes and polyelectrolyte complex nanoparticles

#110
20170044422
2017-02-16

Modified nonionic surfactant formulations for enhanced oil recovery

#111
20160376882
2016-12-29

Gas diverter for well and reservoir stimulation

#112
20160348485
2016-12-01

Using a combination of a perforating gun with an inflatable to complete multiple zones in a single trip

#113
20160341021
2016-11-24

Non-condensable gas coinjection with fishbone lateral wells

#114
20160319651
2016-11-03

Methods for well completion

#115
20160298436
2016-10-13

Gas diverter for well and reservoir stimulation

#116
20160265324
2016-09-15

Reducing the carbon emissions intensity of a fuel

#117
20160237798
2016-08-18

Nonionic surfactants for enhanced crude oil recovery

#118
20160186545
2016-06-30

LOW SALINITY WATER INJECTION ALTERNATING WITH IMMISCIBLE GAS INJECTION TO INCREASE OIL RECOVERY

#119
20160186544
2016-06-30

Simultaneous injection and production well system

#120
20160177686
2016-06-23

Method, system, and optimization technique to improve oil reservoir recovery in the Water-Alternating-Gas injection process by using downhole control valves (WAG-CV)

#121
20160160613
2016-06-09

Connection system for subsea flow interface equipment

#122
20160160116
2016-06-09

Hydrocarbon recovery using complex water and carbon dioxide emulsions

#123
20160160115
2016-06-09

Volatile surfactant treatment for use in subterranean formation operations

#124
20160069169
2016-03-10

System and method for extracting resources from a reservoir through customized ratios of fluid and gas injections

#125
20160053594
2016-02-25

Method for COEOR and storage and use thereof

#126
20160009981
2016-01-14

ENHANCED OIL RECOVERY PROCESS TO INJECT LOW-SALINITY WATER ALTERNATING SURFACTANT-GAS IN OIL-WET CARBONATE RESERVOIRS

#127
20150315885
2015-11-05

Methods and systems for generating reactive fluoride species from a gaseous precursor in a subterranean formation for stimulation thereof

#128
20150285045
2015-10-08

Well stimulation

#129
20150233222
2015-08-20

ENHANCED OIL RECOVERY PROCESS TO INJECT LOW SALINITY WATER AND GAS IN CARBONATE RESERVOIRS

#130
20150204170
2015-07-23

SINGLE WELL INJECT-PRODUCE PILOT FOR EOR

#131
20150198018
2015-07-16

COMPOSITION FOR AND PROCESS OF RECOVERING OIL FROM AN OIL-BEARING FORMATION

#132
20150184499
2015-07-02

Enhanced recovery of hydrocarbon through supercritical wet combustion, gravity stable in deep heavy-oil reservoirs

#133
20150175876
2015-06-25

METHOD AND FOAM COMPOSITION FOR RECOVERING HYDROCARBONS FROM A SUBTERRANEAN RESERVOIR

#134
20150159476
2015-06-11

Oil recovery with insulating composition

#135
20150144353
2015-05-28

Downhole system having chemical injection valve assembly and method of chemical injection

#136
20150144337
2015-05-28

Waste heat recovery from depleted reservoir

#137
20150068750
2015-03-12

Recovery from a hydrocarbon reservoir

#138
20150041132
2015-02-12

Method of using diverter and proppant mixture

#139
20150013978
2015-01-15

Inflow control valve for controlling the flow of fluids into a generally horizontal production well and method of using the same

#140
20140374108
2014-12-25

Method for fracturing subterranean rock

#141
20140360733
2014-12-11

Controlled geyser well

#142
20140332226
2014-11-13

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#143
20140332222
2014-11-13

Connection system for subsea flow interface equipment

#144
20140262261
2014-09-18

Methods and compositions for stimulating the production of hydrocarbons from subterranean formations

#145
20140262255
2014-09-18

Methods for improving the sweep efficiency of gas injection

#146
20140251618
2014-09-11

Method to improve conformance control in carbon dioxide flooding

#147
20140251607
2014-09-11

Nonionic surfactants for enhanced crude oil recovery

#148
20140216011
2014-08-07

System and method for catalyst heat utilization for gas turbine with exhaust gas recirculation

#149
20140190689
2014-07-10

USE OF FOAM WITH IN SITU COMBUSTION PROCESS

#150
20140151050
2014-06-05

Injection system for enhanced oil recovery

#151
20140110117
2014-04-24

Modified nonionic surfactant formulations for enhanced oil recovery

#152
20140096961
2014-04-10

Thermal mobilization of heavy hydrocarbon deposits

#153
20140014336
2014-01-16

Enhancing fluid recovery in subterranean wells with a cryogenic pump and a cryogenic fluid manufacturing plant

#154
20130341246
2013-12-26

Reducing the carbon emissions intensity of a fuel

#155
20130331301
2013-12-12

Methods for using complementary surfactant compositions

#156
20130312980
2013-11-28

Injecting a hydrate slurry into a reservoir

#157
20130248188
2013-09-26

IN-SITU SELF DIVERTING WAG PROCESS

#158
20130180720
2013-07-18

Non-acidic exothermic sandstone stimulation fluids

#159
20130180712
2013-07-18

Method for accelerating heavy oil production

#160
20130146283
2013-06-13

Oil recovery process using crossed hortizonal wells

#161
20130106117
2013-05-02

Low Emission Heating of A Hydrocarbon Formation

#162
20130098622
2013-04-25

Downhole polymer foam applications

#163
20130043163
2013-02-21

Reducing the carbon emissions intensity of a fuel

#164
20120292055
2012-11-22

Pressure assisted oil recovery

#165
20120273214
2012-11-01

Connection system for subsea flow interface equipment

#166
20120267094
2012-10-25

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#167
20120205127
2012-08-16

Selective displacement of water in pressure communication with a hydrocarbon reservoir

#168
20120205096
2012-08-16

METHOD FOR DISPLACEMENT OF WATER FROM A POROUS AND PERMEABLE FORMATION

#169
20120193094
2012-08-02

Multiple infill wells within a gravity-dominated hydrocarbon recovery process

#170
20120175103
2012-07-12

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#171
20120160507
2012-06-28

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#172
20120125644
2012-05-24

Enhanced oil recovery in low permeability reservoirs

#173
20120071366
2012-03-22

Complementary surfactant compositions and methods for making and using same

#174
20120035405
2012-02-09

METHOD FOR ENHANCED GAS HYDRATE PERMEABILITY

#175
20120018151
2012-01-26

Inert gas injection to help control or extinguish coal fires

#176
20110290500
2011-12-01

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#177
20110278001
2011-11-17

THERMAL MOBILIZATION OF HEAVY HYDROCARBON DEPOSITS

#178
20110272152
2011-11-10

Operating Wells In Groups In Solvent-Dominated Recovery Processes

#179
20110253380
2011-10-20

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#180
20110226483
2011-09-22

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#181
20110155378
2011-06-30

FOAM OPTIMIZATION METHOD FOR DELIQUIFYING WELLS

#182
20110146978
2011-06-23

INTEGRATED ENHANCED OIL RECOVERY PROCESS

#183
20110100632
2011-05-05

Method for monitoring flood front movement during flooding of subsurface formations

#184
20100276146
2010-11-04

Method and apparatus to enhance oil recovery in wells

#185
20100270223
2010-10-28

Methods and apparatus for enhancing venturi suction in eductor mixers

#186
20100206576
2010-08-19

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#187
20100206547
2010-08-19

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#188
20100206546
2010-08-19

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#189
20100200249
2010-08-12

Gas-assisted process for in-situ bitumen recovery from carbonate reservoirs

#190
20100200229
2010-08-12

SYSTEM AND METHOD FOR HYDROCARBON RECOVERY AND EXTRACTION

#191
20100170683
2010-07-08

GAS ACTIVITY ANALYSIS IN THE GROUND

#192
20100096147
2010-04-22

Methods and apparatuses for enhanced in situ hydrocarbon production

#193
20090325824
2009-12-31

Mixture for improved foaming in the extraction of petroleum or natural gas

#194
20090301728
2009-12-10

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#195
20090301727
2009-12-10

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#196
20090294132
2009-12-03

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#197
20090294125
2009-12-03

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#198
20090025936
2009-01-29

Connection system for subsea flow interface equipment

#199
20080185151
2008-08-07

Hydrocarbon production system and method of use

#200
20080006571
2008-01-10

Method and apparatus for treatment of wastewater employing membrane bioreactors

#201
20070284107
2007-12-13

Heavy Oil Recovery and Apparatus

#202
20070199705
2007-08-30

ENHANCED HYDROCARBON RECOVERY BY VAPORIZING SOLVENTS IN OIL SAND FORMATIONS

#203
20070056738
2007-03-15

Stimulation and injection system

#204
20060237194
2006-10-26

Apparatus and method for recovering fluids from a well and/or injecting fluids into a well

#205
20060180306
2006-08-17

Method for improved vertical sweep of oil reservoirs

#206
20060020438
2006-01-26

Method and system for simulating a hydrocarbon-bearing formation

#207
20050279505
2005-12-22

System for recovering downhole oil and gas from economically nonviable wells

#208
20050173336
2005-08-11

Apparatus for enhancing venturi suction in eductor mixers

#209
20050133270
2005-06-23

Oil recovery using non-cryogenically produced nitrogen and off-gas recycling

#210
20050084393
2005-04-21

Methods and apparatus for increasing and extending oil production from underground formations nearly depleted of natural gas drive

#211
20050082064
2005-04-21

Hybrid coiled tubing/fluid pumping unit

#212
20050028984
2005-02-10

Recovery of production fluids from an oil or gas well

#213
20050028971
2005-02-10

Dynamic reduction of the moisture layer during the displacement of a viscoelastic fluid using a fluid with lower viscosity

#214
20050023199
2005-02-03

Method and apparatus for treatment of wastewater employing membrane bioreactors

#215
17573210
2023-03-07

Membrane-based systems and methods for increasing the mass transfer rate of dissolved gases

#216
17213427
2022-07-12

Adsorption improved water in supercritical CO2 encapsulation for improved oil recovery

#217
16127665
2021-12-07

Treatment of subterranean formations