ClassID:

104266

C09K8/16 - 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; Well-drilling compositions; Aqueous well-drilling compositions; Clay-containing compositions characterised by the inorganic compounds other than clay

Recent Application in this class:
#1
20250327389
2025-10-23

WATER/GAS RATIO REDUCER COMPOUNDS

#2
20250326964
2025-10-23

CLAY SWELLING INHIBITORS

#3
20250326963
2025-10-23

DRILLING WITH WATER-BASED MUD INCLUDING MULTIPLE CLAYS

#4
20250027375
2025-01-23

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

#5
20240343964
2024-10-17

ENVIRONMENTALLY ACCEPTABLE WELLBORE STABILITY ADDITIVE

#6
20240247179
2024-07-25

Curing lost circulation of water-based drilling muds

#7
20240191129
2024-06-13

WATER-BASED FRICTION-REDUCING SLURRY COMPOSITIONS, FORMATION TREATING FLUIDS THEREFROM, AND METHOD FOR MAKING AND USING SAME

#8
20240043733
2024-02-08

Method for drilling a wellbore with a reduced ferrite sag composition

#9
20240018407
2024-01-18

DRILLING FLUIDS AND METHODS OF MAKING AND USING THEREOF

#10
20240018406
2024-01-18

Manganese oxide sulfide capture drilling fluid

#11
20240010902
2024-01-11

Environmentally acceptable wellbore stability additive

#12
20240002716
2024-01-04

Simultaneous association-dissociation of layered silicates on polymers to improve rheology of drilling fluids

#13
20230407160
2023-12-21

SEPIOLITE CONTAINING DRILLING FLUID COMPOSITIONS AND METHODS OF USING THE SAME

#14
20230383165
2023-11-30

Permanganate based hydrogen sulfide scavenging drilling fluid

#15
20230340316
2023-10-26

Weighted drilling fluid containing metal-modified phyllosilicate

#16
20230303905
2023-09-28

Alkaline earth metal minerals as carriers for surfactants in drilling fluids

#17
20230141596
2023-05-11

Multifunctional fluorescent tags for subterranean applications

#18
20230133053
2023-05-04

Bionic and dual-phobic high-performance water-based drilling fluid

#19
20220290030
2022-09-15

Drilling fluids and methods of making and using thereof

#20
20220213375
2022-07-07

SPENT JET-ENGINE OIL AS DRILLING LUBRICANT

#21
20220145158
2022-05-12

STABLE MAGNETIC DRILLING MUD AND METHOD

#22
20220081603
2022-03-17

Downhole fluids and methods of use thereof

#23
20210404270
2021-12-30

High-intensity acoustic treatment of colloidal mineral suspensions for wellbore operations

#24
20210395596
2021-12-23

Suspension supporting additive for water-based drilling and completions fluids

#25
20210355365
2021-11-18

Potassium salt treatment fluids for clay stabilization

#26
20210348046
2021-11-11

Saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof

#27
20210309907
2021-10-07

Well treatment fluid having biodegradable fluid loss control agent

#28
20210253930
2021-08-19

Well bore spacer and efficiency fluids comprising geopolymers

#29
20210222045
2021-07-22

COMPOSITIONS AND METHODS FOR WELLBORE STRENGTHENING APPLICATIONS

#30
20210198551
2021-07-01

Pozzolanic by-product for slurry yield enhancement

#31
20210071058
2021-03-11

Method for making and using a drilling fluid

#32
20210062065
2021-03-04

Pozzolanic by-product for slurry yield enhancement

#33
20210032524
2021-02-04

Water-based drilling fluids that include lubricants

#34
20200399521
2020-12-24

Drilling fluids that include water-soluble acid catalysts and uses for such

#35
20200392392
2020-12-17

Perlite containing drilling fluids and uses thereof

#36
20200317982
2020-10-08

Lost circulation material (LCM) pill for total loss control

#37
20200317981
2020-10-08

Water-based drilling, completion, and workover fluid composition with reduced barite sagging

#38
20200283336
2020-09-10

Hydrating swellable clays

#39
20200270503
2020-08-27

Method and materials to convert a drilling mud into a solid gel based lost circulation material

#40
20200115610
2020-04-16

Utilization of steel-making waste in drilling fluids formulations

#41
20190390099
2019-12-26

Downhole fluids and methods of use thereof

#42
20190225542
2019-07-25

Hydrating swellable clays

#43
20190218442
2019-07-18

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

#44
20190218441
2019-07-18

Method for drilling a hydrogen sulfide-containing formation

#45
20190169481
2019-06-06

Solid/liquid high film strength fluid lubricant

#46
20190144731
2019-05-16

Loss circulation material for seepage to moderate loss control

#47
20190144730
2019-05-16

Loss circulation material for seepage to moderate loss control

#48
20190136112
2019-05-09

Lubricant additives for water based drilling fluid

#49
20180334605
2018-11-22

Compositions and methods for fiber-containing grout

#50
20180223154
2018-08-09

Drilling fluid

#51
20180171201
2018-06-21

Loss circulation material for seepage to moderate loss control

#52
20180155603
2018-06-07

Compositions and methods for fiber-containing grout

#53
20180037795
2018-02-08

Downhole fluids and methods of use thereof

#54
20180022989
2018-01-25

Treatment fluids comprising anhydrous ammonia for use in subterranean formation operations

#55
20180016485
2018-01-18

Barrier pills

#56
20170058179
2017-03-02

Method for making and using a drilling fluid

#57
20170058178
2017-03-02

Drilling fluid and method for drilling in coal-containing formations

#58
20160272870
2016-09-22

Aqueous suspensions of silica additives

#59
20160068735
2016-03-10

Compositions and methods for fiber-containing grout

#60
20150322325
2015-11-12

Ecofriendly lubricating additives for water-based wellbore drilling fluids

#61
20140326446
2014-11-06

Placing a fluid comprising kiln dust in a wellbore through a bottom hole assembly

#62
20140154451
2014-06-05

Monolayer film and hydrophilic material comprising the same

#63
20130225457
2013-08-29

Drilling fluid and method for drilling in coal-containing formations

#64
20130206479
2013-08-15

Drilling fluid and method for drilling in coal-containing formations

#65
20120192768
2012-08-02

Lost circulation compositions and associated methods

#66
20110278006
2011-11-17

DEFLUIDIZING LOST CIRCULATION PILLS

#67
20110162845
2011-07-07

Lost circulation compositions and associated methods

#68
20110056683
2011-03-10

Wellbore fluid comprising a base fluid and a particulate bridging agent

#69
20100326728
2010-12-30

Mineral-based drilling fluid and drilling method

#70
20100089650
2010-04-15

Drilling fluid and method for drilling in coal-containing formations

#71
20100069267
2010-03-18

Non-damaging manganese tetroxide water-based drilling fluids

#72
20100065273
2010-03-18

Methods and materials for zonal isolation

#73
20090275487
2009-11-05

Additive for increasing the density of an oil-based fluid and fluid comprising such additive

#74
20090258800
2009-10-15

Methods for minimizing the amount of graphite particles used during drilling operations

#75
20090124521
2009-05-14

Additive for increasing the density of a fluid for casing annulus pressure control

#76
20090020728
2009-01-22

METHOD FOR CONTROLLING THE THICKENING OF AQUEOUS SYSTEMS

#77
20090008095
2009-01-08

Wellbore fluid comprising a base fluid and a particulate bridging agent

#78
20080251755
2008-10-16

Downhole servicing compositions having high thermal conductivities and methods of using the same

#79
20080200350
2008-08-21

Process fluid

#80
20080169130
2008-07-17

WELLBORE FLUIDS FOR CASING DRILLING

#81
20080110627
2008-05-15

Well treating method to prevent or cure lost-circulation

#82
20080103065
2008-05-01

Compositions comprising melt-processed inorganic fibers and methods of using such compositions

#83
20070287637
2007-12-13

Additive for increasing the density of an oil-based fluid and fluid comprising such additive

#84
20070238621
2007-10-11

Settable drilling fluids comprising cement kiln dust

#85
20070235188
2007-10-11

Non-damaging manganese tetroxide water-based drilling fluids

#86
20070227404
2007-10-04

Method of using high-alumina cements for rheology control of liquid phases

#87
20070184987
2007-08-09

Additive for increasing the density of an oil-based fluid and fluid comprising such additive

#88
20070173418
2007-07-26

Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control

#89
20070105725
2007-05-10

Drilling well with drilling fluid of fluid phase and weighting agent

#90
20070105724
2007-05-10

METHOD OF USING A SIZED BARITE AS A WEIGHTING AGENT FOR DRILLING FLUIDS

#91
20070056730
2007-03-15

Well treating method to prevent or cure lost-circulation

#92
20060258547
2006-11-16

Zeolite-containing remedial compositions

#93
20060243166
2006-11-02

Downhole servicing compositions having high thermal conductivities and methods of using the same

#94
20060157244
2006-07-20

Compositions comprising melt-processed inorganic fibers and methods of using such compositions

#95
20060154829
2006-07-13

Hydrocarbon recovery

#96
20060122070
2006-06-08

Drilling fluid systems comprising sized graphite particles

#97
20060111247
2006-05-25

Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control

#98
20060096759
2006-05-11

Methods and compositions for controlling lost circulation in subterranean operations

#99
20060054359
2006-03-16

Method of decreasing the disintegration of shale-containing cuttings and drilling fluid therefor

#100
20060025312
2006-02-02

Cement-free zeolite and fly ash settable fluids and methods therefor

#101
20050277553
2005-12-15

Sized barite as a weighting agent for drilling fluids

#102
20050277552
2005-12-15

Method of drilling using a sized barite as a weighting agent for drilling fluids

#103
20050277551
2005-12-15

Method of using a sized barite as a weighting agent for drilling fluids

#104
20050124502
2005-06-09

Compositions for restoring lost circulation

#105
20050072599
2005-04-07

Zeolite-containing remedial compositions

#106
20050051363
2005-03-10

Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control

#107
20050014655
2005-01-20

Method of stabilising clay or shale

#108
19073674
2025-10-14

Wellbore and geologic formation desulfurization process

#109
19032595
2025-09-16

Silicate water-based drilling fluid for coalbed methane wells and application thereof

#110
18911321
2025-08-26

Hydrogen sulfide treatment method for crude oil/sour gas

#111
18809440
2025-04-15

Process and material for removing hydrogen sulfide from subterranean geological formations during drilling operations

#112
18763303
2024-10-29

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

#113
17857411
2023-07-25

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

#114
17829877
2022-10-25

Invert emulsion drilling fluid containing hydrophobic metallic zinc nanoparticles and method of drilling subterranean geological formation

#115
17751785
2022-10-25

Mineral oil invert emulsion hydrogen sulfide mitigating drilling fluid and method of drilling subterranean geological formation

#116
17727063
2023-01-03

Leak-proof lost-circulation control water-based drilling fluid composition and preparation method and use thereof

#117
16743811
2020-11-10

Micro-nanometer plugging anti-collapse drilling fluid and preparation method and use thereof

#118
16742279
2020-11-10

Modified nano-silica plugging agent, water-based drilling fluid, and preparation method and use thereof

#119
16523228
2020-01-14

Strong plugging drilling fluid composition and preparation method thereof, and use thereof

#120
16392395
2019-10-15

Super-amphiphobic strongly self-cleaning high-performance water-based drilling fluid and drilling method

#121
16281535
2020-05-19

Method and materials to convert a drilling mud into a solid gel based lost circulation material

#122
15952880
2019-03-19

Drilling fluid for inhibiting surface hydration of clay and preparation method thereof

#123
15795799
2018-06-26

High-temperature cross-linking deep-well drilling fluid and preparation method thereof

#124
15795792
2018-03-27

Deep-well polysulfonate drilling fluid and preparation method thereof