ClassID:

135391

E21B21/068 - CPC Classification

Classification description:

Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor; Arrangements for treating drilling fluids outside the borehole using chemical treatment

Recent Application in this class:
#1
20260055677
2026-02-26

Method of Preparing Drilling Mud Through Integrating Ultrasonic Mixing and Venturi Technology

#2
20260036006
2026-02-05

DRILLING FLUID TREATMENT PROCESS AND SYSTEM

#3
20250388498
2025-12-25

GEOTECHNICAL CHARACTERISTICS OF TAILINGS VIA LIME ADDITION

#4
20250369294
2025-12-04

SYSTEM AND METHOD FOR RESPONSIVELY INJECTING CHEMISTRIES DIRECTLY INTO A DOWNHOLE SLURRY

#5
20250230086
2025-07-17

METHODS AND SYSTEMS OF DEWATERING TAILINGS

#6
20250115695
2025-04-10

CONTAMINANT REMEDIATION WITH FUNCTIONALIZED (METH)ACRYLIC POLYMER OR COPOLYMER MACROPARTICULATES AND SYSTEMS RELATED THERETO

#7
20250085268
2025-03-13

DRILLING FLUID OPTIMIZATION FOR CUTTINGS TRANSPORT AND RATE OF PENETRATION

#8
20250027375
2025-01-23

METHOD FOR MITIGATING BARITE SAG IN WATER-BASED MUD WITH THERMOCHEMICAL FLUID

#9
20240132768
2024-04-25

Additives to temporarily reduce viscosities in oil-based fluids

#10
20240117737
2024-04-11

Measuring drilling fluid hydrogen sulfide with smart polymers

#11
20240117690
2024-04-11

DRILLING RETURN FLOWLINE CONTINUOUS AGITATION FLOCCULANT METERING DISPENSER

#12
20240117093
2024-04-11

CONTAMINANT REMEDIATION WITH FUNCTIONALIZED (METH)ACRYLIC POLYMER OR COPOLYMER MACROPARTICULATES AND SYSTEMS RELATED THERETO

#13
20240068355
2024-02-29

SYSTEMS AND METHODS FOR WELLBORE DRILLING UTILIZING A THERMOCHEMICAL SULFATE REDUCTION (TSR) PROXY

#14
20240067865
2024-02-29

Treating fluid comprising hydrocarbons, water, and polymer

#15
20240046282
2024-02-08

EVALUATING HYDROCARBON EXPLORATION AND RECOVERY OPERATIONS FLUIDS BASED ON CARBON FOOTPRINT

#16
20240025778
2024-01-25

GEOTECHNICAL CHARACTERISTICS OF TAILINGS VIA LIME ADDITION

#17
20230407715
2023-12-21

Method and system for managing carbon containing gases

#18
20230373838
2023-11-23

Methods and systems of dewatering tailings

#19
20230323193
2023-10-12

Ph control in fluid treatment

#20
20230167720
2023-06-01

HYDROGEN PRODUCTION, STORAGE AND RECOVERY

#21
20230167719
2023-06-01

HYDROGEN PRODUCTION, STORAGE AND RECOVERY

#22
20230160284
2023-05-25

HYDROGEN PRODUCTION, STORAGE AND RECOVERY

#23
20230077276
2023-03-09

Hydrogen production, storage and recovery

#24
20230032931
2023-02-02

Method for separating drill fluid from oily drill cuttings slurries

#25
20220332611
2022-10-20

METHODS AND COMPOSITIONS FOR THE TREATMENT OF PRODUCED WATER

#26
20220267661
2022-08-25

Base oil for re-use

#27
20220259350
2022-08-18

Contaminant remediation with functionalized (meth)acrylic polymer or copolymer macroparticulates and systems related thereto

#28
20220251935
2022-08-11

Hydrogen storage and recovery with fracture monitoring

#29
20220251435
2022-08-11

Additives to temporarily reduce viscosities in oil-based fluids

#30
20220153620
2022-05-19

System and method of removing oil and toxic metals from petroleum produced water

#31
20220145157
2022-05-12

Treating fluid comprising hydrocarbons, water, and polymer

#32
20220055083
2022-02-24

TREATMENT OF THICK FINE TAILINGS INCLUDING CHEMICAL IMMOBILIZATION, POLYMER FLOCCULATION AND DEWATERING

#33
20220042384
2022-02-10

Mill systems and methods for processing drill cuttings

#34
20220010195
2022-01-13

NEUTRALIZE HAZARD GASES CONTROL SYSTEM

#35
20210395602
2021-12-23

PH control in fluid treatment

#36
20210332651
2021-10-28

Fracture fluid alteration to mitigate barite scale precipitation in unconventional oil/gas shale systems

#37
20210317015
2021-10-14

Methods of improving compatibility of oilfield produced water from different sources

#38
20210101808
2021-04-08

Geotechnical characteristics of tailings via lime addition

#39
20210101807
2021-04-08

Geotechnical characteristics of tailings via lime addition

#40
20210071058
2021-03-11

Method for making and using a drilling fluid

#41
20200392802
2020-12-17

Multi-component downhole treatment

#42
20200332612
2020-10-22

METHOD FOR SEPARATING DRILL FLUID FROM OILY DRILL CUTTINGS SLURRIES

#43
20200332170
2020-10-22

Methods of suspending weighting agents in a drilling fluid

#44
20200246744
2020-08-06

Hydrogen sulfide removal process

#45
20200140298
2020-05-07

Methods for treating sulfides in gaseous streams

#46
20200095490
2020-03-26

METHODS AND SYSTEMS FOR NEUTRALIZING HYDROGEN SULFIDE DURING DRILLING

#47
20200079666
2020-03-12

Method for treating sulfides in waste streams

#48
20200079664
2020-03-12

Geotechnical characteristics of tailings via lime addition

#49
20200048972
2020-02-13

Fracture fluid alteration to mitigate barite scale precipitation in unconventional oil/gas shale systems

#50
20190388942
2019-12-26

Method, system and device for reducing microbial concentration and/or biofilm formation

#51
20190382667
2019-12-19

RECOVERING BASE OIL FROM CONTAMINATED INVERT EMULSION FLUID FOR MAKING NEW OIL- /SYNTHETIC-BASED FLUIDS

#52
20190330938
2019-10-31

SYSTEMS AND METHODS FOR DOSING EARTHEN SLURRIES WITH AN ADDITIVE TO MODIFY A FLUID PROPERTY OF THE SLURRY

#53
20190301253
2019-10-03

Mill systems and methods for processing drill cuttings

#54
20190300402
2019-10-03

Method for treating sulfides in waste streams

#55
20190262769
2019-08-29

Hydrogen sulfide removal process

#56
20190256375
2019-08-22

COLLOIDAL SILICA ADDITION TO PROMOTE THE SEPARATION OF OIL FROM WATER

#57
20190248684
2019-08-15

Method for treating sulfides in waste streams

#58
20190242203
2019-08-08

In-line methods and apparatuses for determining the composition of an emulsified drilling fluid

#59
20190152823
2019-05-23

Treatment of thick fine tailings including chemical immobilization, polymer flocculation and dewatering

#60
20190152814
2019-05-23

Method of treating high-solids mineral slurries with polymeric flocculants

#61
20190136113
2019-05-09

Performance non-emulsifiers that employ branched alcohols and a new high-solvency carrier oil

#62
20190112424
2019-04-18

AMINE-ALDEHYDE RESINS AND USES THEREOF IN SEPARATION PROCESSES

#63
20190106346
2019-04-11

SAGD saline water system optimization

#64
20190047886
2019-02-14

Method for treating sulfides in waste streams

#65
20180340382
2018-11-29

Treatment of recovered commercial solids for use in oilfield fluids

#66
20180334606
2018-11-22

Base oil for re-use

#67
20180273405
2018-09-27

Treatment of mature fine tailings in produced water by flocculation and dewatering

#68
20180244973
2018-08-30

Methods of cleaning invert emulsion drilling fluids

#69
20180202246
2018-07-19

In-line methods and apparatuses for determining the composition of an emulsified drilling fluid

#70
20180193775
2018-07-12

Diluent treated drilling waste material recovery process and system

#71
20180117503
2018-05-03

Gas-tight low gravity separation device

#72
20180072589
2018-03-15

Hydrocarbon-contamination treatment unit

#73
20180023376
2018-01-25

Reclamation of brines with metal contamination using lime

#74
20170342315
2017-11-30

Systems and methods for removing contaminants from high density completion fluid

#75
20170335660
2017-11-23

Drilling fluid disposal injection system and method

#76
20170260439
2017-09-14

Method for forming a high-performance aqueous-phase polymer fluid and system for drilling well bores in low-gradient formations

#77
20170253814
2017-09-07

Removal of iron contaminants from hydrocarbon oils and aqueous by-products of oil and gas recovery/production

#78
20170218285
2017-08-03

WASTE TREATMENT PROCESS FOR A FOSSIL-FUEL EXTRACTION SITE

#79
20170210970
2017-07-27

Composition of biodegradable surfactants for separating impurities in a hydrocarbon

#80
20170167212
2017-06-15

Method of treating produced or flowback water with nucleophilic agent to deactivate breaker

#81
20170073257
2017-03-16

Method for treating sulfides in waste streams

#82
20170058179
2017-03-02

Method for making and using a drilling fluid

#83
20170015897
2017-01-19

Formulations of copolymers based on alkyl acrylates used as defoamers of heavy and super-heavy crude oils

#84
20160376509
2016-12-29

Recovering base oil from contaminated invert emulsion fluid for making new oil-/synthetic-based fluids

#85
20160356142
2016-12-08

Automatic dosing of surfactant for recovered hydrocarbon enhancement

#86
20160326020
2016-11-10

Method for treatment of drill cuttings

#87
20160326019
2016-11-10

Method for recycling oilfield and other wastewater

#88
20160222277
2016-08-04

Use of anti-agglomerants in high gas to oil ratio formations

#89
20160137535
2016-05-19

Use of peracetic acid/hydrogen peroxide and peroxide-reducing agents for treatment of drilling fluids, frac fluids, flowback water and disposal water

#90
20160130893
2016-05-12

Methods and systems for fluid removal from a structure

#91
20160123097
2016-05-05

Method of Treating Flowback Fluid from a Well

#92
20160115369
2016-04-28

Composition and method for dispersing paraffins in crude oils

#93
20160024377
2016-01-28

Systems and methods for removing contaminants from high density completion fluid

#94
20160017209
2016-01-21

Process for treating a wastewater stream produced by hydrocarbon production operations for repurposing as a disinfectant for hydrocarbon production operations

#95
20150353664
2015-12-10

Multivalent polymers for clay aggregation

#96
20150336030
2015-11-26

Process and apparatus for treating drilling fluid

#97
20150322325
2015-11-12

Ecofriendly lubricating additives for water-based wellbore drilling fluids

#98
20150239764
2015-08-27

Method for treating mineral sludge by flocculation in-line then above ground

#99
20150166378
2015-06-18

N-vinylpyrrolidone-based cationic copolymer for separating an oil-in-water emulsion

#100
20150136402
2015-05-21

Modified hydrocarbon resins as fluid loss additives

#101
20150112102
2015-04-23

System and method for removal of heavy metal ions from a rich hydrate inhibitor stream

#102
20150101805
2015-04-16

Viscoelastic surfactant based wellbore fluids and methods of use

#103
20150065400
2015-03-05

Composition of biodegradable surfactants for separating impurities in a hydrocarbon

#104
20150008190
2015-01-08

Method and system for processing a stream comprising glycol based and kinetic hydrate inhibitors

#105
20140332473
2014-11-13

Multistage filtrating pre-treatment for desalination of oilfield produced water

#106
20140332282
2014-11-13

Method for cleaning oil from drill cuttings

#107
20140301921
2014-10-09

Amine-aldehyde resins and uses thereof in separation processes

#108
20140291249
2014-10-02

Composite media for water treatment processes and methods of using same

#109
20140286854
2014-09-25

Treatment of gas well hydrofracture wastewaters

#110
20140243464
2014-08-28

Polymers useful as demulsifiers and clarifiers

#111
20140224733
2014-08-14

Colloidal silica addition to promote the separation of oil from water

#112
20140174723
2014-06-26

Defoaming agent compositions and methods of making and using same

#113
20140102699
2014-04-17

Defoaming agent compositions and methods of making and using same

#114
20140014589
2014-01-16

METHOD FOR CLEANING DRILLING FLUID IN ROCK SAMPLING DRILLING AND A CLEANING UNIT

#115
20130264293
2013-10-10

Use of peracetic acid/hydrogen peroxide and peroxide-reducing agents for treatment of drilling fluids, frac fluids, flowback water and disposal water

#116
20130259743
2013-10-03

Use of peracetic acid/hydrogen peroxide and peroxide-reducing enzymes for treatment of drilling fluids, frac fluids, flowback water and disposal water

#117
20130225457
2013-08-29

Drilling fluid and method for drilling in coal-containing formations

#118
20130186838
2013-07-25

Method for dispersing and aggregating components of mineral slurries and high-molecular weight multivalent polymers for clay aggregation

#119
20130172218
2013-07-04

COMPOUND OF BIODEGRADABLE SURFACTANTS FOR SEPARATING IMPURITIES IN A HYDROCARBON

#120
20130157905
2013-06-20

Method for the removal or suppression of interfering metal ions using environmentally friendly competitive binders

#121
20130092619
2013-04-18

Plant for treating drilling muds

#122
20120125611
2012-05-24

Water injection systems and methods

#123
20120090898
2012-04-19

Method for cleaning oil from drill cuttings

#124
20120085530
2012-04-12

Treatment for recycling fracture water—gas and oil recovery in shale deposits

#125
20120080232
2012-04-05

Emulsion-based cleaning composition for oilfield applications

#126
20120055852
2012-03-08

Treatment of oil-contaminated solids

#127
20120034152
2012-02-09

Portable system for on-site iodine extraction from an aqueous solution

#128
20110303408
2011-12-15

CONCENTRATION OF MINOR CONSTITUENT OF WELLBORE FLUID

#129
20110297381
2011-12-08

Moderation of oil extraction waste environments

#130
20110247986
2011-10-13

Reclamation of formate brines

#131
20110220418
2011-09-15

Oil-based drilling fluid recovery and reuse

#132
20110182135
2011-07-28

Enhanced slurrification method

#133
20110174695
2011-07-21

PROCESSES FOR RECYCLING SAG-D PROCESS WATER AND CLEANING DRILL CUTTINGS

#134
20110166050
2011-07-07

TREATMENT AND REUSE OF OILFIELD PRODUCED WATER

#135
20110110846
2011-05-12

Portable system for on-site iodine extraction from an aqueous solution

#136
20100319923
2010-12-23

Mobile systems and methods of sufficiently treating water so that the treated water may be utilized in well-treatment operations

#137
20100298174
2010-11-25

CHEMICAL TREATMENT OF CUTTINGS FOR RE-INJECTION INTO SUBTERRANEAN FORMATIONS

#138
20100294498
2010-11-25

Viscoelastic surfactant based wellbore fluids and methods of use

#139
20100248997
2010-09-30

Treatment and reuse of oilfield produced water for operations in a well

#140
20100204511
2010-08-12

Reclamation of halide-contaminated formate brines

#141
20100204066
2010-08-12

Water absorbing polymers for treatment of brines and water-based drilling fluids

#142
20100125044
2010-05-20

Treatment of gas well hydrofracture wastewaters

#143
20100112505
2010-05-06

METHOD AND APPARATUS FOR PROCESSING OIL DRILLING WASTE

#144
20100108616
2010-05-06

CHEMICAL COMPOSITION AND PROCESS FOR TREATING GEOTECHNICAL SLURRIES

#145
20100089650
2010-04-15

Drilling fluid and method for drilling in coal-containing formations

#146
20090313772
2009-12-24

COMPOSITION COMPRISING PEROXYGEN AND SURFACTANT COMPOUNDS AND METHOD OF USING THE SAME

#147
20090184055
2009-07-23

Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid

#148
20090183922
2009-07-23

Method of removing dissolved iron in aqueous systems

#149
20090057237
2009-03-05

Mobile systems and methods of sufficiently treating water so that the treated water may be utilized in well-treatment operations

#150
20080314415
2008-12-25

Cleaning Contaminated Materials

#151
20080296222
2008-12-04

Enhanced Slurrification Method

#152
20080287323
2008-11-20

Treatment and Reuse of Oilfield Produced Water

#153
20080237141
2008-10-02

Treatment for recycling fracture water gas and oil recovery in shale deposits

#154
20080207471
2008-08-28

Using oxidizing agents to remove thiocyanates from brines

#155
20080194436
2008-08-14

Methods for using reversible phase oil-based drilling fluid

#156
20080164067
2008-07-10

Method for Reducing Aqueous Content of Oil-Based Fluids

#157
20080121564
2008-05-29

Recycling of oil-based drilling muds

#158
20080113880
2008-05-15

SOLID-LIQUID SEPARATION OF OIL-BASED MUDS

#159
20080061003
2008-03-13

Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid

#160
20070284311
2007-12-13

Recycling hydrocarbon hydraulic stimulation fluid

#161
20070277977
2007-12-06

Recycling hydrocarbon hydraulic stimulation fluid

#162
20070214715
2007-09-20

Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil

#163
20070138101
2007-06-21

Method of reclaiming brine solutions using an organic chelant

#164
20070131623
2007-06-14

Method of reclaiming brine solutions using an organic chelant

#165
20070125716
2007-06-07

Process for separating mixtures

#166
20070125714
2007-06-07

Processes for removing oil from solid wellbore materials and produced water

#167
20070111902
2007-05-17

Methods for using reversible phase oil-based drilling fluid

#168
20070107303
2007-05-17

Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil

#169
20070095762
2007-05-03

Method of reclaiming brine solutions using an organic chelant

#170
20070012630
2007-01-18

Amine-aldehyde resins and uses thereof in separation processes

#171
20060237372
2006-10-26

Separation of drilling mud emulsions

#172
20060191195
2006-08-31

Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil

#173
20060185236
2006-08-24

Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil

#174
20060151397
2006-07-13

Amine-aldehyde resins and uses thereof in separation processes

#175
20060151360
2006-07-13

Modified amine-aldehyde resins and uses thereof in separation processes

#176
20060032820
2006-02-16

Processes for removing oil from solid wellbore materials and produced water

#177
20060011547
2006-01-19

Methods of separating components in treatment fluids

#178
20050274677
2005-12-15

Methods for treating heavy halide brines with permanganates

#179
20050227875
2005-10-13

Method of reclaiming a well completion brine solutions using an organic chelant

#180
20050187114
2005-08-25

Re-use of recovered treating fluid

#181
20050176590
2005-08-11

Re-use of recovered treating fluid

#182
20050092671
2005-05-05

Apparatus for recycling of oil-based drilling fluid contaminated with water and water contaminated with oil based drilling fluid

#183
20050090405
2005-04-28

Vermiculture compositions

#184
20050067350
2005-03-31

Solid-liquid separation of oil-based muds

#185
20050067194
2005-03-31

Solid-liquid separation of oil-based muds

#186
20050039656
2005-02-24

Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil

#187
20050014654
2005-01-20

Method of reclaiming brine solutions using an organic chelant

#188
18811351
2026-02-24

Method of preparing drilling mud through integrating ultrasonic mixing and venturi technology

#189
17546881
2022-06-14

Method to perform background LCM treatments