ClassID:

104309

C09K8/532 - 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 preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates Sulfur

Recent Application in this class:
#1
20260035609
2026-02-05

SCALE INHIBITION IN A WELLBORE

#2
20260035608
2026-02-05

SCALE INHIBITION IN A WELLBORE

#3
20260008950
2026-01-08

HYDROGEN SULFIDE SCAVAGING METHOD USING LAYERED TRIPLE HYDROXIDE

#4
20250368886
2025-12-04

MITIGATING IRON SULFIDE IN GAS WELLS

#5
20250346801
2025-11-13

Method for Removing Metal Contaminants

#6
20250346800
2025-11-13

NANOBUBBLE FOR IMPROVING SCAVENGER EFFICIENCY

#7
20250346799
2025-11-13

MATERIAL AND METHODS FOR ENHANCED TRIAZINE-H2S SCAVENGING EFFICIENCY IN BUBBLE TOWER REACTOR USING NANO-BUBBLING TECHNOLOGY

#8
20250289990
2025-09-18

COMPOSITIONS AND METHODS FOR IRON CHELATION

#9
20250263596
2025-08-21

SULFONYL AZIDE COMPOSITION FOR SULFUR SCAVENGING IN OILFIELD OPERATIONS

#10
20250109330
2025-04-03

METHOD FOR REDUCING HYDROGEN SULFIDE (H2S) CONTENT OF H2S-CONTAINING SUBTERRANEAN FORMATION

#11
20250075120
2025-03-06

Metal sulfide scale dissolver for oilfield application

#12
20250075119
2025-03-06

Water Soluble Anionic Metal-Organic Cages As Cation Capture Species For Scale Reduction

#13
20250051632
2025-02-13

COMPOSITIONS AND METHODS FOR DISSOLVING IRON SULFIDE

#14
20250051631
2025-02-13

COMPOSITIONS AND METHODS FOR DISSOLVING DEPOSITS AND INHIBITING CORROSION

#15
20250002773
2025-01-02

POLYKETONE RESIN BLEND WITH COLORANT

#16
20240400925
2024-12-05

OXIDIZING COMPOSITIONS FOR REMOVING SULFUR COMPOUNDS FROM HYDROCARBON FUELS AND WASTEWATER

#17
20240400886
2024-12-05

OXIDIZING COMPOSITIONS FOR REMOVING SULFUR COMPOUNDS FROM HYDROCARBON FUELS AND WASTEWATER

#18
20240368452
2024-11-07

COMPOSITIONS AND METHODS FOR THE DISSOLUTION OF IRON SULFIDE

#19
20240224999
2024-07-11

METABOLIC INHIBITORS FOR CONTROLLING BIOFILM

#20
20240218273
2024-07-04

ZINC-BASED SULFUR COMPOUND SCAVENGER WITH REDUCED SOLIDS DEPOSITION

#21
20240218239
2024-07-04

CALCIUM SULFATE SCALE CONTROL FOR DISPOSAL WELLS

#22
20240217909
2024-07-04

STABILIZING ACROLEIN IN CARBONATE SOLVENTS

#23
20240174912
2024-05-30

REGENERATING SOLVENT MIXTURES THAT ARE USED FOR ELEMENTAL SULFUR REMOVAL WITHIN HYDROCARBON WELLS

#24
20240110091
2024-04-04

COMPOSITIONS AND METHODS FOR SCAVENGING SULFUR-CONTAINING COMPOUNDS

#25
20240084459
2024-03-14

COMPOSITIONS AND METHODS FOR DISSOLVING IRON SULFIDE AND INHIBITING CORROSION

#26
20240071740
2024-02-29

METHOD OF SCALE INHIBITOR ANALYSIS

#27
20240067543
2024-02-29

Process for decontamination of hazardous sulfur compounds in sour water tanks

#28
20240034923
2024-02-01

ODOR MANAGEMENT FOR DISULFIDE SOLVENTS AND SURFACES CONTACTED THEREWITH

#29
20240018410
2024-01-18

Solids removal using solvent blends comprising a disulfide solvent

#30
20240018406
2024-01-18

Manganese oxide sulfide capture drilling fluid

#31
20230323189
2023-10-12

Solvent mixtures for downhole elemental sulfur removal and formation stimulation

#32
20230227711
2023-07-20

Tube coating with polar surface treated silica-based nanoparticles to prevent build-up of solid sulfur

#33
20230220269
2023-07-13

Using silica nanoparticles to reduce the deposition of solid sulfur in natural gas wells

#34
20230193113
2023-06-22

Increasing scavenging efficiency of HS scavenger by adding linear polymer

#35
20230183554
2023-06-15

COMPOSITION FOR REMEDIATING IRON SULFIDE IN OILFIELD PRODUCTION SYSTEMS

#36
20230183553
2023-06-15

COMPOSITIONS AND METHODS FOR IRON CHELATION

#37
20230159812
2023-05-25

Synergized Acetals Composition And Method For Scavenging Sulfides And Mercaptans

#38
20230133492
2023-05-04

IRON SULFIDE AND HYDROGEN SULFIDE TREATMENT FLUID

#39
20230102592
2023-03-30

Chemical compositions and in-situ methods of using same for remediating sulfur-containing compositions and other contaminants in fluids being extracted from the earth

#40
20230017959
2023-01-19

Solvent mixtures for downhole elemental sulfur removal and formation stimulation

#41
20220363974
2022-11-17

Oil Well Additive

#42
20220340805
2022-10-27

Methods of treating paraffins, iron sulfide, hydrogen sulfide, and/or bacteria

#43
20220340804
2022-10-27

Amorphous Dithiazine Dissolution Formulation and Method for Using the Same

#44
20220298404
2022-09-22

Processing produced fluids for fluid recovery

#45
20220119699
2022-04-21

Synergized Acetals Composition And Method For Scavenging Sulfides And Mercaptans

#46
20220073808
2022-03-10

Multivalent iron bio-inhibitor from waste bauxite residue to control reservoir souring

#47
20220017812
2022-01-20

Removal of a mineral phase from a surface associated with a wellbore

#48
20220010195
2022-01-13

NEUTRALIZE HAZARD GASES CONTROL SYSTEM

#49
20210395123
2021-12-23

TREATMENT OF IRON SULPHIDE DEPOSITS

#50
20210355809
2021-11-18

Compositions, systems, and methods for iron sulfide scale identification, prevention, and reduction

#51
20210317357
2021-10-14

Amorphous dithiazine dissolution formulation and method for using the same

#52
20210269308
2021-09-02

CHLORINE DIOXIDE PRECURSOR AND METHODS OF USING SAME

#53
20210130719
2021-05-06

SULFUR MANAGEMENT METHOD

#54
20210108125
2021-04-15

COMPOSITION AND METHOD FOR CONTROLLING BACTERIA IN FORMATIONS

#55
20210108124
2021-04-15

Iron sulphide scale removal from oil and gas wells using green formulation

#56
20210040374
2021-02-11

Processing produced fluids for fluid recovery

#57
20210024810
2021-01-28

Controlling metal sulfide scale in drilling operations

#58
20200377394
2020-12-03

Process for decontamination of hazardous sulfur compounds in sour water tanks

#59
20200270509
2020-08-27

SOLVENT SYSTEMS HAVING A HIGH FLASH POINT AND METHODS OF USE THEREOF

#60
20200239772
2020-07-30

Acrylate-based sulfur scavenging agents for use in oilfield operations

#61
20200190395
2020-06-18

Composition and method for controlling bacteria in formations

#62
20200157439
2020-05-21

Synergized acetals composition and method for scavenging sulfides and mercaptans

#63
20200149382
2020-05-14

In-line treatment cartridge and methods of using same

#64
20200123433
2020-04-23

Compositions and methods for reducing hydrogen sulfide and microbial influenced corrosion in crude oil, natural gas, and in associated equipment

#65
20200109329
2020-04-09

Synergized acetals composition and method for scavenging sulfides and mercaptans

#66
20200109328
2020-04-09

Process for removal of hydrogen sulfide in downhole oilfield application

#67
20200095490
2020-03-26

METHODS AND SYSTEMS FOR NEUTRALIZING HYDROGEN SULFIDE DURING DRILLING

#68
20200095148
2020-03-26

Method of suspending elemental sulfur in water

#69
20200087568
2020-03-19

Method for removing iron sulfide and calcium carbonate scale

#70
20200048529
2020-02-13

Treating seawater for hydrocarbon production

#71
20200032125
2020-01-30

COMBINED USES OF A PHOSPHOROUS COMPOUND FOR IRON SULPHIDE DISSOLUTION AND BACTERIAL CONTROL

#72
20200002599
2020-01-02

Solvent mixtures for dissolving elemental sulfur, methods of utilizing the solvent mixtures, and methods of forming the solvent mixtures

#73
20190367799
2019-12-05

PROCESS AND COMPOSITION FOR REMOVING METAL SULFIDES

#74
20190233711
2019-08-01

Iron sulfide dissolver

#75
20190225867
2019-07-25

Treating seawater for hydrocarbon production

#76
20190218442
2019-07-18

Method for drilling a wellbore with a weighted hydrogen sulfide scavenger fluid

#77
20190218441
2019-07-18

Method for drilling a hydrogen sulfide-containing formation

#78
20190194523
2019-06-27

Synergized hemiacetals composition and method for scavenging sulfides and mercaptans

#79
20190185739
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#80
20190185738
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#81
20190185737
2019-06-20

Compositions and methods for enhanced fracture cleanup using redox treatment

#82
20190177601
2019-06-13

Acidizing treatment fluids for use in subterranean formation operations

#83
20190062184
2019-02-28

Elemental sulfur dispersant to control fouling in water systems

#84
20190040300
2019-02-07

Reduced corrosion iron sulfide scale removing fluids

#85
20190010380
2019-01-10

Method for controlling bacteria in formations using molybdate

#86
20190010379
2019-01-10

Composition and method for controlling bacteria in formations

#87
20190002768
2019-01-03

Nitrogen based hydrogen sulfide scavengers and method of use thereof

#88
20180347316
2018-12-06

Multi-stage treatment for iron sulfide scales

#89
20180340113
2018-11-29

Iron sulfide removal in oilfield applications

#90
20180320054
2018-11-08

Compositions and methods for enhanced fracture cleanup using redox treatment

#91
20180305604
2018-10-25

Electrolytic system and method for processing a hydrocarbon source

#92
20180297874
2018-10-18

Process for decontamination of hazardous sulfur compounds in sour water tanks

#93
20180245004
2018-08-30

Use of sulfonium salts as hydrogen sulfide inhibitors

#94
20180238153
2018-08-23

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

#95
20180171210
2018-06-21

Process for removal of hydrogen sulfide in downhole oilfield applications

#96
20180170752
2018-06-21

IN-SITU GENERATION OF CHLORINE DIOXIDE USING METHANESULFONIC ACID FOR REMEDIATION OF SCALE AND SULFIDE

#97
20180169714
2018-06-21

Compositions, systems, and methods for removing iron sulfide scale from oilfield components

#98
20180148632
2018-05-31

Composition for remediating iron sulfide in oilfield production systems

#99
20180105732
2018-04-19

Composition and method for inhibition of sulfide scales

#100
20180105729
2018-04-19

WINTERIZING COMPOSITIONS FOR SULFUR SCAVENGERS AND METHODS FOR MAKING AND USING SAME

#101
20180100096
2018-04-12

Composition and method for scavenging sulfides and mercaptans

#102
20180072940
2018-03-15

Compositions, systems, and methods for removing iron sulfide scale from oilfield components using methyl acrylate

#103
20180072936
2018-03-15

Methods and systems for neutralizing hydrogen sulfide during drilling

#104
20170369764
2017-12-28

FORMULATIONS AND METHODS FOR MINERAL SCALE REMOVAL

#105
20170362492
2017-12-21

Method for removing iron sulfide scale from oil well equipment

#106
20170355895
2017-12-14

Activity enhanced scale dispersant for treating inorganic sulfide scales

#107
20170349810
2017-12-07

Nano-inhibitors

#108
20170335188
2017-11-23

Acrylate-based sulfur scavenging agents for use in oilfield operations

#109
20170292058
2017-10-12

Process for inhibition of sulphide scales

#110
20170283685
2017-10-05

SPECIFIC INHIBITORS OF (PER)CHLORATE RESPIRATION AS A MEANS TO ENHANCE THE EFFECTIVENESS OF (PER)CHLORATE AS A SOURING CONTROL MECHANISM IN OIL RESERVOIRS

#111
20170251665
2017-09-07

Solid antimicrobial glutaraldehyde compositions and their uses

#112
20170247601
2017-08-31

METHOD FOR INHIBITING SULFIDE STRESS CRACKING OF METALS

#113
20170247600
2017-08-31

Methods and compositions for inhibiting sulfide stress cracking

#114
20170198198
2017-07-13

Method for removing iron sulfide scale

#115
20170166801
2017-06-15

Solvent systems having a high flash point and methods of use thereof

#116
20170152431
2017-06-01

Compositions and method for treating out hydrogen sulfide and preventing settling of precipitate in an environmentally responsible drilling and packer fluid

#117
20170145291
2017-05-25

Method of preventing or mitigating formation of metal sulfide scales during oil and gas production

#118
20170101574
2017-04-13

Compositions, systems, and methods for removing iron sulfide scale from oilfield components

#119
20170029691
2017-02-02

Cleaning and removal of wax deposits in oil and gas wells using cationic polymers

#120
20160369156
2016-12-22

Microbial metabolism of chlorine oxyanions as a control of biogenic hydrogen sulfide production

#121
20160355724
2016-12-08

Acrylonitrile-based sulfur scavenging agents and methods of use in oilfield operations

#122
20160333251
2016-11-17

Use of a copolymer made from styrene sulphonic acid to inhibit or slow the formation of sulphide deposits

#123
20160312104
2016-10-27

Methods for inhibiting iron sulfide scale in oil wells

#124
20160237335
2016-08-18

Cyanamide-based carbon dioxide and/or hydrogen sulfide scavengers and methods of use in subterranean operations

#125
20160222762
2016-08-04

Diphenyliodonium salts as sulfidogenesis inhibitors and antimicrobials

#126
20160160105
2016-06-09

Enzymes for removing sulfurous compounds in downhole fluids

#127
20160115370
2016-04-28

METALLIC NANOPARTICLE BIOCIDE IN INDUSTRIAL APPLICATIONS

#128
20160017206
2016-01-21

METHODS FOR IMMEDIATE SOURING CONTROL IN GASES OR FLUIDS PRODUCED FROM SULFIDOGENIC RESERVOIR SYSTEMS

#129
20150166877
2015-06-18

Process of removal of hydrogen sulfide in downhole oilfield applications

#130
20150080275
2015-03-19

Process For Inhibition Of Sulphide Scales

#131
20150027961
2015-01-29

Process for decontamination of hazardous sulfur compounds in sour water tanks

#132
20150000919
2015-01-01

Chelating fluid for enhanced oil recovery in carbonate reservoirs and method of using the same

#133
20150000918
2015-01-01

Catalyzed polyamine sulfide scavengers and methods of use in subterranean treatment fluids

#134
20140299314
2014-10-09

METHOD FOR THE USE OF NITRATES AND NITRATE REDUCING BACTERIA FOR MITIGATING BIOGENIC SULFIDE PRODUCTION

#135
20140057817
2014-02-27

Method of scavenging hydrogen sulfide and/or sulfhydryl compounds

#136
20130324442
2013-12-05

Compositions and method for treating out hydrogen sulfide and preventing settling of precipitate in an environmentally responsible drilling and packer fluid

#137
20130224092
2013-08-29

Inhibiting corrosion caused by aqueous aldehyde solutions

#138
20130131387
2013-05-23

Methods and compounds for improving sulfide scavenging activity

#139
20130118996
2013-05-16

HEXAHYDROTRIAZINES, SYNTHESIS AND USE

#140
20130056214
2013-03-07

REDUCING SULFIDE IN PRODUCTION FLUIDS DURING OIL RECOVERY

#141
20130056203
2013-03-07

Reducing sulfide in oil reservoir production fluids

#142
20120244228
2012-09-27

Chlorine dioxide precursor and methods of using same

#143
20120220500
2012-08-30

Process for removal of hydrogen sulfide in downhole oilfield applications

#144
20120190598
2012-07-26

Metallic nanoparticle biocide in industrial applications

#145
20120152857
2012-06-21

Non-nitrogen sulfide sweeteners

#146
20120149117
2012-06-14

Hydrogen sulfide (HS) detection using functionalized nanoparticles

#147
20120088697
2012-04-12

Foamer/sulfur scavenger composition and methods for making and using same

#148
20110132602
2011-06-09

Systems and methods for producing oil and/or gas

#149
20110094750
2011-04-28

SYSTEMS AND METHODS FOR PRODUCING OIL AND/OR GAS

#150
20100305010
2010-12-02

HIGH DENSITY PHOSPHATE BRINES AND METHODS FOR MAKING AND USING SAME

#151
20090288822
2009-11-26

Mitigation of elemental sulfur deposition during production of hydrocarbon gases

#152
20090143252
2009-06-04

Dispersing sulfide scales in oil and gas production systems

#153
20080108518
2008-05-08

METHOD OF REMOVING DISPERSED SULFUR FROM SULFUR-CONTAINING FLUIDS

#154
20080053920
2008-03-06

Scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams

#155
20050250666
2005-11-10

Foamer/sulfur scavenger composition and methods for making and using same

#156
20050238556
2005-10-27

Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams

#157
19215103
2026-01-27

Aqueous injection fluid and method for sulfate scale inhibition in subterranean formations

#158
18764927
2024-11-19

Removing hydrogen sulfide from subterranean geological formation with a copper magnesium iron layered triple hydroxide material in a water-based drilling fluid

#159
18201155
2024-09-10

Stabilizing scavenger formulations in the presence of excess formaldehyde for storage at elevated temperatures

#160
17857411
2023-07-25

Hydrogen sulfide mitigating drilling fluid and method of drilling subterranean geological formation

#161
17830932
2023-09-05

Method of removing sulfide-containing scale

#162
17731667
2024-10-15

Method for neutralizing hydrogen sulfide in a wellbore with a venturi jet pump and oxidants

#163
17238772
2022-07-05

Nanodissolver for iron sulfide scale removal

#164
17229234
2022-11-08

Solvent mixtures for downhole elemental sulfur removal and formation stimulation