ClassID:

104265

C09K8/145 - 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 composition of the clay

Recent Application in this class:
#1
20250326963
2025-10-23

DRILLING WITH WATER-BASED MUD INCLUDING MULTIPLE CLAYS

#2
20250250475
2025-08-07

PLANT-BASED DRILLING FLUID COMPOSITION

#3
20250197709
2025-06-19

HIGH TEMPERATURE HIGH SALT LOW END RHEOLOGY MODIFIERS

#4
20240158684
2024-05-16

Okra composition as a shale swelling inhibitor in water-based drilling fluids

#5
20240043734
2024-02-08

High temperature high salt low end rheology modifiers

#6
20240002716
2024-01-04

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

#7
20230407160
2023-12-21

SEPIOLITE CONTAINING DRILLING FLUID COMPOSITIONS AND METHODS OF USING THE SAME

#8
20230383165
2023-11-30

Permanganate based hydrogen sulfide scavenging drilling fluid

#9
20230340316
2023-10-26

Weighted drilling fluid containing metal-modified phyllosilicate

#10
20220267693
2022-08-25

Lubricant formulation for multiple water-based muds

#11
20220235257
2022-07-28

Synthetic functionalized additives, methods of synthesizing, and methods of use

#12
20220213375
2022-07-07

SPENT JET-ENGINE OIL AS DRILLING LUBRICANT

#13
20220155479
2022-05-19

Clay detection and quantification using downhole low frequency electromagnetic measurements

#14
20220081603
2022-03-17

Downhole fluids and methods of use thereof

#15
20210404270
2021-12-30

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

#16
20210395598
2021-12-23

Water-based foamed system for perforating zones with low pressure and high temperature

#17
20210348046
2021-11-11

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

#18
20210309907
2021-10-07

Well treatment fluid having biodegradable fluid loss control agent

#19
20210253930
2021-08-19

Well bore spacer and efficiency fluids comprising geopolymers

#20
20210198551
2021-07-01

Pozzolanic by-product for slurry yield enhancement

#21
20210124079
2021-04-29

Clay detection and quantification using downhole low frequency electromagnetic measurements

#22
20210087455
2021-03-25

Methods and compositions for enhancing clay viscosifiers

#23
20210071060
2021-03-11

Drilling fluids and methods of making thereof

#24
20210071057
2021-03-11

METHOD FOR LUBRICATING UNDERGROUND CHANNELS USING ALUMINUM PHYLLOSILICATES

#25
20210062065
2021-03-04

Pozzolanic by-product for slurry yield enhancement

#26
20200369939
2020-11-26

Treatment of calcium-containing bentonites for drilling fluids

#27
20200317982
2020-10-08

Lost circulation material (LCM) pill for total loss control

#28
20200283336
2020-09-10

Hydrating swellable clays

#29
20200190384
2020-06-18

Viscosity supporting additive for water-based drilling and completions fluids

#30
20200017747
2020-01-16

Date pit based drilling fluid composition

#31
20200002593
2020-01-02

Method for making a drilling composition and treating a subterranean formation

#32
20190390099
2019-12-26

Downhole fluids and methods of use thereof

#33
20190233706
2019-08-01

Drilling fluid composition containing treated date pit particles and methods of use thereof

#34
20190233705
2019-08-01

Date tree trunk-based fibrous loss circulation materials

#35
20190225542
2019-07-25

Hydrating swellable clays

#36
20190218871
2019-07-18

ARC perm-squeeze RDF—a permeable plug forming rapidly dehydrating fluid

#37
20190218870
2019-07-18

ARC perm-squeeze RDF—a permeable plug forming rapidly dehydrating fluid

#38
20190218869
2019-07-18

ARC perm-squeeze RDF—a permeable plug forming rapidly dehydrating fluid

#39
20190169481
2019-06-06

Solid/liquid high film strength fluid lubricant

#40
20190145200
2019-05-16

ARC perm-squeeze RDF—a permeable plug forming rapidly dehydrating fluid

#41
20190144731
2019-05-16

Loss circulation material for seepage to moderate loss control

#42
20190144730
2019-05-16

Loss circulation material for seepage to moderate loss control

#43
20190136111
2019-05-09

COMPOSITION FOR DRILLING FLUID AND METHOD OF DRILLING A BOREHOLE

#44
20190127625
2019-05-02

Modified cellulose nanocrystals and their use in drilling fluids

#45
20180171201
2018-06-21

Loss circulation material for seepage to moderate loss control

#46
20180057729
2018-03-01

Date tree trunk-based fibrous loss circulation materials

#47
20180037795
2018-02-08

Downhole fluids and methods of use thereof

#48
20180016485
2018-01-18

Barrier pills

#49
20160272870
2016-09-22

Aqueous suspensions of silica additives

#50
20160009982
2016-01-14

Use of nano-sized phyllosilicate minerals in viscoelastic surfactant fluids

#51
20140155302
2014-06-05

Oil well drilling fluids, oil well cement composition and slurry of weighting material

#52
20130316936
2013-11-28

Volcanic ash-based drilling mud to overcome drilling challenges

#53
20130255944
2013-10-03

Hydrated sheet silicate minerals for reducing permeability in a well

#54
20120245059
2012-09-27

Use of high ratio aqueous alkali silicates in drilling fluids

#55
20120186494
2012-07-26

Cement compositions and methods utilizing nano-clay

#56
20120108471
2012-05-03

Volcanic ash-based drilling mud to overcome drilling challenges

#57
20120048548
2012-03-01

Use of nano-sized phyllosilicate minerals in viscoelastic surfactant fluids

#58
20110180256
2011-07-28

CHROME FREE WATER-BASED WELLBORE FLUID

#59
20110139454
2011-06-16

Method for providing thixotrophy to fluids downhole

#60
20110056748
2011-03-10

WELLBORE FLUIDS CONTAINING SIZED CLAY MATERIAL AND METHODS OF USE THEREOF

#61
20100025039
2010-02-04

Cement compositions and methods utilizing nano-clay

#62
20090176666
2009-07-09

Drilling fluids containing biodegradable organophilic clay

#63
20080227670
2008-09-18

Drilling fluids containing biodegradable organophilic clay treated with an amide-containing quaternary ammonium surfactant

#64
20080169130
2008-07-17

WELLBORE FLUIDS FOR CASING DRILLING

#65
20080070811
2008-03-20

Functionalized clay compositions for aqueous based drilling fluids

#66
20070246221
2007-10-25

DISPERSIVE RISERLESS DRILLING FLUID

#67
20070034410
2007-02-15

Methods for reducing circulation loss during drilling operations

#68
20060166840
2006-07-27

Drilling fluids containing biodegradable organophilic clay

#69
20050221994
2005-10-06

Drilling fluid systems for reducing circulation losses

#70
20050080145
2005-04-14

Method and compositions for rheology modification of aqueous soluble salt solutions

#71
20050003967
2005-01-06

Colloidal and colloidal-like systems in aqueous, clay-based fluids

#72
18812507
2025-10-07

Combination clay stabilizer having an alkali metal asphalt sulfonate and quaternary ammonium salt

#73
17866046
2023-05-02

Nanometer self-locking bentonite film-forming agent, method for preparing the same, and film-forming drilling fluid

#74
17829805
2022-10-25

Rhamnolipid stabilized invert emulsion drilling fluid and method of drilling subterranean geological formation

#75
17751785
2022-10-25

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

#76
16743811
2020-11-10

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

#77
16742279
2020-11-10

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

#78
15795799
2018-06-26

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