ClassID:

104331

C09K8/604 - CPC Classification

Classification description:

Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations; Compositions for stimulating production by acting on the underground formation containing surfactants Polymeric surfactants

Recent Application in this class:
#1
20260139184
2026-05-21

BRINE-TOLERANT COMPOSITIONS COMPRISING FATTY ACID OR FATTY ESTER REACTION PRODUCTS OF SACCHARIDE POLYMERS

#2
20260098204
2026-04-09

INJECTION FLUIDS COMPRISING AN ANIONIC SURFACTANT FOR TREATING UNCONVENTIONAL FORMATIONS

#3
20260049241
2026-02-19

HIGHLY CONCENTRATED PARTICULATE POLYMER FRICTION-REDUCING SLURRY COMPOSITIONS AND FRACTURING FLUIDS MADE THEREFROM AND METHODS FOR MAKING AND USING SAME

#4
20260035343
2026-02-05

NOVEL SULFOBETAINE MONOMERS, PROCESS FOR PREPARING SAME, AND USES THEREOF

#5
20260008951
2026-01-08

HYDROGEN SULFIDE SCAVENGING COMPOSITIONS

#6
20260002071
2026-01-01

AQUEOUS COMPOSITIONS COMPRISING FUNCTIONALIZED SACCHARIDE POLYMERS FOR DEWATERING OF PARTICULATES

#7
20250354052
2025-11-20

ULTRA HIGH ACTIVITY SLURRY FOR HYDRAULIC FRACTURING

#8
20250250479
2025-08-07

METHOD OF OIL RECOVERY USING COMPOSITIONS OF CARBON DIOXIDE AND COMPOUNDS TO INCREASE WATER WETTABILITY OF FORMATIONS

#9
20250223489
2025-07-10

BRINE-TOLERANT COMPOSITIONS COMPRISING FATTY ACID OR FATTY ESTER REACTION PRODUCTS OF SACCHARIDE POLYMERS

#10
20250163327
2025-05-22

EMULSIFYING COMPOSITIONS COMPRISING FATTY ACID OR FATTY ESTER REACTION PRODUCTS OF SACCHARIDE POLYMERS FORMULATED WITH MIXED SURFACTANTS

#11
20240327698
2024-10-03

INJECTION FLUIDS FOR STIMULATING FRACTURED FORMATIONS

#12
20240294823
2024-09-05

Low surface tension surfactant system for enhancing flow-back performance

#13
20240279532
2024-08-22

INJECTION FLUIDS COMPRISING A NON-IONIC SURFACTANT FOR TREATING UNCONVENTIONAL FORMATIONS

#14
20240271032
2024-08-15

INJECTION FLUIDS COMPRISING AN ANIONIC SURFACTANT FOR TREATING UNCONVENTIONAL FORMATIONS

#15
20240262786
2024-08-08

METHOD FOR OBTAINING BIO-SOURCED SUSBTITUTED ALKYL(METH)ACRYLAMIDE

#16
20240199946
2024-06-20

Multifunctional Slickwater Fracturing Fluid

#17
20240199944
2024-06-20

Fracturing Fluid with Superior Proppant Transport Capability

#18
20240110094
2024-04-04

POLYMER COMPOSITIONS AND FRACTURING FLUIDS MADE THEREFROM INCLUDING A MIXTURE OF CATIONIC AND ANIONIC HYDRATABLE POLYMERS AND METHODS FOR MAKING AND USING SAME

#19
20240084192
2024-03-14

FLOWBACK AID FOR FRACTURING FLUIDS

#20
20240084190
2024-03-14

EMULSIONS INCLUDING POLYMERS, TREATMENT FLUIDS INCLUDING EMULSIONS, AND METHODS FOR TREATING SUBTERRANEAN FORMATIONS

#21
20240076540
2024-03-07

Fatty acid reaction products of dextrins or dextran formulated with a surfactant

#22
20240034925
2024-02-01

Enhanced oil recovery with Janus nanoparticles

#23
20240018411
2024-01-18

Amphiphilic block copolymer surfactant for attenuating acid reactivity during acid stimulation of carbonate rich reservoirs

#24
20230392070
2023-12-07

ULTRA HIGH ACTIVITY SLURRY FOR HYDRAULIC FRACTURING

#25
20230332037
2023-10-19

POLYANIONIC SURFACTANTS AND METHODS OF MAKING AND USING THEREOF

#26
20230323194
2023-10-12

FOAM STABILIZATION USING NANOPARTICLES

#27
20230313025
2023-10-05

Superheated phase changing nanodroplets for hydrocarbon reservoir applications

#28
20230257644
2023-08-17

POLYANIONIC SURFACTANTS AND METHODS OF MAKING AND USING THEREOF

#29
20230227713
2023-07-20

MULTICOMPONENT NANOCAPSULES FOR ENHANCED OIL RECOVERY

#30
20230227712
2023-07-20

SOLID DRAG REDUCTION ADDITIVE AND METHODS OF USING SAME

#31
20230220270
2023-07-13

MULTI-FUNCTIONAL COMPOSITIONS FOR ENHANCED OIL AND GAS RECOVERY AND OTHER PETROLEUM INDUSTRY APPLICATIONS

#32
20230183552
2023-06-15

Foamed scale removal and inhibition method for subterranean formation

#33
20230183174
2023-06-15

NOVEL SULFOBETAINE MONOMERS, PROCESS FOR PREPARING SAME, AND USES THEREOF

#34
20230151265
2023-05-18

Piperazine-based viscoelastic surfactants for hydraulic fracturing applications

#35
20230151264
2023-05-18

Methods and compositions of using viscoelastic surfactants as diversion agents

#36
20230137416
2023-05-04

Amphiphilic block copolymer surfactant for attenuating acid reactivity during acid stimulation of carbonate rich reservoirs

#37
20230130401
2023-04-27

LIQUID CHLORIDE SALT-BASED POLYMER SUSPENSION FLUIDS WITH POLYETHYLENE GLYCOL DISPERSANTS AND APPLICATION TO DRAG REDUCTION

#38
20230111955
2023-04-13

Fatty acid reaction products of dextrins or dextran formulated with a surfactant

#39
20230106492
2023-04-06

SYNTHESIS OF DRAG REDUCING LATEX PRODUCT USING CATIONIC SURFACTANTS IN EMULSION POLYMERIZATION

#40
20230020371
2023-01-19

Storable liquid suspension of hollow particles

#41
20230017258
2023-01-19

Polymer dispersions for oilfield friction reduction

#42
20220403227
2022-12-22

Multicomponent nanocapsules for enhanced oil recovery

#43
20220389304
2022-12-08

Methods of using olefin sulfonates

#44
20220380662
2022-12-01

Hydraulic fracturing fluid

#45
20220380661
2022-12-01

QUATERNIZED ALKOXYLATED POLYMER SURFACTANT

#46
20220363980
2022-11-17

METHODS AND SYSTEMS ASSOCIATED WITH LUBRICANT FOR OIL SLURRY

#47
20220363979
2022-11-17

OLEFIN SULFONATES

#48
20220306930
2022-09-29

Solid drag reduction additive and method of using same

#49
20220275268
2022-09-01

Method of oil recovery using compositions of carbon dioxide and compounds to increase carbon dioxide wettability of formations

#50
20220267666
2022-08-25

Methods and systems for adding functionality for cross linked polymers in a wellbore environment

#51
20220177772
2022-06-09

Fatty acid reaction products of dextrins or dextran formulated with a surfactant

#52
20220073812
2022-03-10

DILUTED MICROEMULSIONS WITH LOW SURFACE TENSIONS

#53
20220025251
2022-01-27

Diverting agents for well stimulation

#54
20220025248
2022-01-27

Enhanced oil recovery with janus nanoparticles

#55
20210388255
2021-12-16

Delayed gelling agents

#56
20210380873
2021-12-09

Methods and compositions of using viscoelastic surfactants as diversion agents

#57
20210371730
2021-12-02

Well treatment compositions and methods comprising certain microemulsions and certain clay control additives exhibiting synergistic effect of enhancing clay swelling protection and persistency

#58
20210340433
2021-11-04

Acid emulsifier technology for continuous mixed emulsified acid systems

#59
20210340429
2021-11-04

Fatty acid reaction products of dextrins or dextran formulated with a surfactant

#60
20210324259
2021-10-21

Polymer compositions and fracturing fluids made therefrom including a mixture of cationic and anionic hydratable polymers and methods for making and using same

#61
20210277303
2021-09-09

Storable liquid suspension of hollow particles

#62
20210277299
2021-09-09

Compositions And Methods For Treating Subterranean Formations

#63
20210261853
2021-08-26

Low molecular weight polyacrylates for EOR

#64
20210238471
2021-08-05

Hydrocarbon formation treatment micellar solutions

#65
20210230474
2021-07-29

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

#66
20210222052
2021-07-22

Gemini surfactants containing an arylene linker for clay swelling inhibition

#67
20210189222
2021-06-24

Gemini surfactants containing an unsaturated linker for clay swelling inhibition

#68
20210163816
2021-06-03

Polymer dispersions for oilfield friction reduction

#69
20210155847
2021-05-27

Ultra high activity slurry for hydraulic fracturing

#70
20210108132
2021-04-15

Well treatment compositions and methods comprising certain microemulsions and certain clay control additives exhibiting synergistic effect of enhancing clay swelling protection and persistency

#71
20210095184
2021-04-01

Injection fluids comprising an anionic surfactant for treating unconventional formations

#72
20200399530
2020-12-24

Aqueous delayed acid system for well stimulation

#73
20200392391
2020-12-17

Sugar-based surfactant for well treatment fluids

#74
20200370404
2020-11-26

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

#75
20200362230
2020-11-19

Surfactant composition for the reinjection of produced water

#76
20200317993
2020-10-08

Injection fluids for stimulating fractured formations

#77
20200317992
2020-10-08

Injection fluids comprising a non-ionic surfactant for treating unconventional formations

#78
20200316544
2020-10-08

QUATERNIZED ALKOXYLATED POLYMER SURFACTANT

#79
20200216749
2020-07-09

Siloxane surfactant additives for oil and gas applications

#80
20200208045
2020-07-02

N,N,N′,N′-tetradodecyl-substituted diphenyl ether sulfonate anionic Gemini surfactant and synthesis method thereof

#81
20200208044
2020-07-02

Nonionic Gemini surfactant of (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether and its synthesis method

#82
20200206706
2020-07-02

Core-shell structured non-ionic nanoemulsion system and preparation and use thereof

#83
20200181480
2020-06-11

Alkyl polyglycoside surfactants for use in subterranean formations

#84
20200165510
2020-05-28

Methods for preparing invert emulsions using dibasic ester solvents

#85
20200140746
2020-05-07

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

#86
20200123435
2020-04-23

Brine resistant silica sol

#87
20200017758
2020-01-16

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

#88
20200017757
2020-01-16

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

#89
20200017756
2020-01-16

Compositions and methods for treating subterranean formations

#90
20200010593
2020-01-09

Surfactant responsive emulsion polymerization micro-gels

#91
20190382645
2019-12-19

Hydrocarbon formation treatment micellar solutions

#92
20190345372
2019-11-14

Sugar-based surfactant for well treatment fluids

#93
20190300777
2019-10-03

Phase transition material fluid and proppant formed therefrom

#94
20190284467
2019-09-19

Diluted microemulsions with low surface tensions

#95
20190264096
2019-08-29

FRACTURING FLUID COMPOSITION COMPRISING A BIO-BASED SURFACTANT AND METHOD OF USE

#96
20190225874
2019-07-25

VES fluids having improved rheology at high temperature and high salinity

#97
20190225871
2019-07-25

Brine resistant silica sol

#98
20190211255
2019-07-11

Emulsions including polymers, treatment fluids including emulsions, and methods for treating subterranean formations

#99
20190153304
2019-05-23

DRAG-REDUCING ADDITIVES HAVING DISPERSION POLYMERS AND MICROEMULSIONS AND METHODS FOR PREPARING AND USING SAME

#100
20190093003
2019-03-28

Method of preparing and using a drag-reducing additive having a dispersion polymer

#101
20190085236
2019-03-21

Siloxane surfactant additives for oil and gas applications

#102
20190071598
2019-03-07

Delayed gelling agents

#103
20190055462
2019-02-21

Y-GRADE NGL FRACTURING FLUIDS

#104
20190031949
2019-01-31

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

#105
20190031945
2019-01-31

Surfactant that changes the wettability of tight sandstone and its preparation method and application

#106
20190003294
2019-01-03

Phase-change hydraulic fracturing process

#107
20180355240
2018-12-13

Systems and methods for breaking friction reducers in-situ

#108
20180306016
2018-10-25

STIMULATION TREATMENT CONDUCTIVITY ANALYZER

#109
20180291261
2018-10-11

Hydrocarbon formation treatment micellar solutions

#110
20180265766
2018-09-20

Ethoxylated amines for use in subterranean formations

#111
20180187068
2018-07-05

Method of preparing and using drag-reducing dispersion polymer compositions

#112
20180134949
2018-05-17

Hydrophobic coating of particulates for enhanced well productivity

#113
20180044572
2018-02-15

Flowback aid for fracturing fluids

#114
20180037794
2018-02-08

Surfactant compositions

#115
20170335177
2017-11-23

PROPPANT MATERIALS FOR ADDITIVE DELIVERY

#116
20170298710
2017-10-19

Multi-functional surfactant complexes for use in subterranean formations

#117
20170240804
2017-08-24

Foam composition

#118
20170226408
2017-08-10

Flooding operations employing chlorine dioxide

#119
20170037301
2017-02-09

Polymeric surfactant containing a protein head group and lipid tail group

#120
20160312106
2016-10-27

Siloxane surfactant additives for oil and gas applications

#121
20160304646
2016-10-20

Surfactant Responsive Emulsion Polymerization Micro-Gels

#122
20160280987
2016-09-29

NON-TOXIC AND BIODEGRADABLE SURFACTANTS

#123
20160115371
2016-04-28

Low molecular weight polyacrylates for EOR

#124
20160053159
2016-02-25

NON-TOXIC AND BIODEGRADABLE SURFACTANTS

#125
20150329766
2015-11-19

Method of contacting hydrocarbon-bearing formations with fluorinated ionic polymers

#126
20150218432
2015-08-06

Heat removal in drilling and production operations

#127
20150183911
2015-07-02

Amphiphilic macromolecule and the purpose of this amphiphilic macromolecule

#128
20150114650
2015-04-30

FLOODING OPERATIONS EMPLOYING CHLORINE DIOXIDE

#129
20150068751
2015-03-12

Siloxane surfactant additives for oil and gas applications

#130
20150053404
2015-02-26

Siloxane surfactant additives for oil and gas applications

#131
20150007989
2015-01-08

VISCOELASTIC SURFACTANTS CROSSLINKED WITH DIVALENT IONS AND METHODS FOR MAKING AND USING SAME

#132
20140350204
2014-11-27

Amphiphilic macromolecule and the purpose of this amphiphilic macromolecule

#133
20140346089
2014-11-27

Low interfacial tension surfactants for petroleum applications

#134
20140341957
2014-11-20

Surfactant responsive dispersion polymerized micro-gels

#135
20140316092
2014-10-23

Amphiphilic macromolecule and use thereof

#136
20140311734
2014-10-23

Flooding operations employing chlorine dioxide

#137
20140209305
2014-07-31

Delayed gelling agents

#138
20140057816
2014-02-27

Low interfacial tension surfactants for petroleum applications

#139
20140020899
2014-01-23

Flooding operations employing chlorine dioxide

#140
20140014349
2014-01-16

Fracturing operations employing chlorine dioxide

#141
20130274170
2013-10-17

Compositions of viscoelastic surfactant and hydrophobically modified polymer as aqueous thickeners

#142
20130269932
2013-10-17

Methods for treating carbonate hydrocarbon-bearing formations with fluorinated amine oxides

#143
20130233559
2013-09-12

Surfactant Additives for Stimulating Subterranean Formation During Fracturing Operations

#144
20120216990
2012-08-30

Heat removal in drilling and production operations

#145
20120172262
2012-07-05

Fluorosurfactants and treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods

#146
20120149609
2012-06-14

Polyepihalohydrin reverse emulsion breakers

#147
20120097393
2012-04-26

Methods for treating carbonate hydrocarbon-bearing formations with fluorinated amphoteric compounds

#148
20120055668
2012-03-08

SOLVENTS AND COMPOSITIONS FOR TREATING HYDROCARBON-BEARING FORMATIONS

#149
20120035085
2012-02-09

Drag-reducing copolymer compositions

#150
20110309001
2011-12-22

Low interfacial tension surfactants for petroleum applications

#151
20110177983
2011-07-21

Cationic fluorinated polymer compositions and methods for treating hydrocarbon-bearing formations using the same

#152
20110136704
2011-06-09

Methods of Treating a Hydrocarbon-Bearing Formation, a Well Bore, and Particles

#153
20110092393
2011-04-21

Method of reducing the viscosity of hydrocarbons

#154
20110083848
2011-04-14

Process for mineral oil production using surfactant mixtures

#155
20110056689
2011-03-10

Methods for treating hydrocarbon-bearing formations having brine

#156
20110053810
2011-03-03

Fluorosurfactants and treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods

#157
20100314118
2010-12-16

Liquid crystals for drilling, completion and production fluids

#158
20100292110
2010-11-18

Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells

#159
20100276149
2010-11-04

Method for treating a hydrocarbon-bearing formation with a fluid followed by a nonionic fluorinated polymeric surfactant

#160
20100270021
2010-10-28

Methods for treating hydrocarbon-bearing formations with fluorinated polymer compositions

#161
20100270020
2010-10-28

METHODS FOR TREATING HYDROCARBON-BEARING FORMATIONS WITH FLUORINATED ANIONIC SURFACTANT COMPOSITIONS

#162
20100224361
2010-09-09

Compositions and Methods for Treating a Water Blocked Well

#163
20100167964
2010-07-01

Compositions and methods for treating a water blocked well using a nonionic fluorinated surfactant

#164
20100137169
2010-06-03

Method for treating a fractured formation with a non-ionic fluorinated polymeric surfactant

#165
20100044050
2010-02-25

Fluorinated surfactants and methods of using the same

#166
20090281004
2009-11-12

Composition and method for fluid recovery from well

#167
20090062155
2009-03-05

Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells

#168
20080207780
2008-08-28

Hydroxy polyesters and uses as biodegradable demulsifiers

#169
20080194432
2008-08-14

Method for breaking the viscosity of polymer-thickened aqueous systems for mineral oil and natural gas exploration

#170
20080051551
2008-02-28

Compositions and methods for improving the productivity of hydrocarbon producing wells using a non-ionic fluorinated polymeric surfactant

#171
20080051300
2008-02-28

Compositions and method for improving the productivity of hydrocarbon producing wells

#172
20070225176
2007-09-27

Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells

#173
20060258544
2006-11-16

Degradable surfactants and methods for use

#174
20060258543
2006-11-16

Degradable surfactants and methods for use

#175
20060254774
2006-11-16

Degradable surfactants and methods for use

#176
20060100109
2006-05-11

Surfactant-polymer compositions for enhancing the stability of viscoelastic-surfactant based fluid

#177
18919619
2025-09-02

Compositions and methods for increasing permeability in hydrocarbon shale formations

#178
18768521
2024-12-24

Compositions and methods for increasing permeability in hydrocarbon shale formations

#179
18768483
2024-11-12

Compositions and methods for inhibiting clay swelling in hydrocarbon shale formations

#180
17819772
2024-01-09

Methods for hydraulic fracturing and flowback fluid compositions suitable for such

#181
17816795
2023-12-12

Method to attenuate acid reactivity of subterranean formations with omniphobic chemicals

#182
17708672
2023-07-25

Superheated phase changing nanodroplets for hydrocarbon reservoir applications