ClassID:

104259

C09K8/05 - 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 containing inorganic compounds only, e.g. mixtures of clay and salt

Recent Application in this class:
#1
20260002068
2026-01-01

ULTRA-HIGH DENSITY WELLBORE FLUIDS PRODUCED THROUGH ALKALIZATION OF AQUEOUS ISOPOLYMETALATE SOLUTIONS

#2
20250388800
2025-12-25

METHODS FOR FREEING DIFFERENTIALLY STUCK PIPES

#3
20250361434
2025-11-27

METHOD AND SYSTEM FOR IN-SITU SEQUESTRATION AND MINERALIZATION OF CARBON DIOXIDE

#4
20250236777
2025-07-24

WATER-BASED DRILLING MUD FORMULATION USING WASTEWATER DISCHARGE

#5
20250223484
2025-07-10

PREPARATION OF METAL OXIDE NANOPARTICLES FROM CATHODES OF LITHIUM-ION BATTERIES

#6
20250066660
2025-02-27

EUTECTIC METAL ALLOY IN DRILLING FLUIDS AND METHODS OF USE THEREOF

#7
20240384151
2024-11-21

CLEAR, HIGH-DENSITY HEAVY BRINE-BASED FLUIDS FOR DOWNHOLE APPLICATIONS

#8
20240166934
2024-05-23

WATER-BASED DRILLING MUD FORMULATION USING WASTEWATER DISCHARGE

#9
20240068328
2024-02-29

Exothermic drilling fluid composition and method of use

#10
20230357622
2023-11-09

Inhibitive divalent wellbore fluids, methods of providing said fluids, and uses thereof

#11
20230235208
2023-07-27

Methods and compositions for enhancing integrity and thermal conductivity of wellbores in geothermal operations

#12
20230183551
2023-06-15

DISSOLUTION OF FILTER CAKE AT LOW TEMPERATURES

#13
20230072927
2023-03-09

Methods for completing a wellbore using high density brine containing colloidal particles

#14
20220213374
2022-07-07

High density brine with low crystallization temperature

#15
20220089931
2022-03-24

Forming drilling fluid from produced water

#16
20200369938
2020-11-26

Inhibitive divalent wellbore fluids, methods of providing said fluids, and uses thereof

#17
20200362219
2020-11-19

Lowering the crystallization temperature of brines

#18
20200283672
2020-09-10

Cationic coatings for improved nanoparticle transport in a carbonate reservoir

#19
20200181471
2020-06-11

High density aqueous well fluids

#20
20200148933
2020-05-14

Buoyant particles designed for compressibility

#21
20200148932
2020-05-14

Method of designing compressible particles having buoyancy in a confined volume

#22
20200010758
2020-01-09

Thermally-stable, non-precipitating, high-density wellbore fluids

#23
20190345377
2019-11-14

Nanocomposite coated proppants and methods of making and use thereof

#24
20190316019
2019-10-17

Drill fluid and method for tunneling

#25
20190185729
2019-06-20

Treatment fluids comprising calcium aluminate cement and methods of use

#26
20190119562
2019-04-25

Method of forming a mixture of barite particles, chelating agent and bentonite for fracturing

#27
20190119561
2019-04-25

Method for making a drilling fluid composition and fracturing a subterranean formation

#28
20190023976
2019-01-24

METHOD OF PRODUCING MICRONIZED BARITE PARTICLES

#29
20180355235
2018-12-13

Modification of bentonite properties for drilling fluids

#30
20180298706
2018-10-18

Direct emulsions and methods of use

#31
20180298266
2018-10-18

Weighted fluids for treatment of subterranean formations

#32
20180223154
2018-08-09

Drilling fluid

#33
20180194989
2018-07-12

Hedta Based Chelants Used with Divalent Brines, Wellbore Fluids including The Same and Methods of Use Thereof

#34
20180171205
2018-06-21

Mitigation of annular pressure build-up using treatment fluids comprising calcium aluminate cement

#35
20180155602
2018-06-07

High Density Brine Containing Colloidal Particles

#36
20180155600
2018-06-07

Hydro-fracking method using an aloe vera fracturing fluid

#37
20180112118
2018-04-26

Oil-phase-free triple-play slick water concentration system with effects of synergistically reducing drag, assisting drainage and promoting clay stabilization

#38
20180112117
2018-04-26

Multifunctional slick water concentrate integrating properties of drag reducer, flow back surfactant and clay stabilizer

#39
20180010038
2018-01-11

Foam forming compositions comprising a particulate inorganic material

#40
20170313926
2017-11-02

Treatment fluids comprising calcium aluminate cement and methods of use

#41
20170283678
2017-10-05

Modification of bentonite properties for drilling fluids

#42
20170247605
2017-08-31

Thermally-stable, non-precipitating, high-density wellbore fluids

#43
20170240790
2017-08-24

Rare earth-containing compounds to enhance performance of downhole treatment compositions

#44
20170233630
2017-08-17

High density aqueous well fluids

#45
20170233629
2017-08-17

Drilling mud composition with Aloe vera particles and a fracking process using the same

#46
20170190955
2017-07-06

Method of fracturing a subterranean formation using micronized barite particles

#47
20170174973
2017-06-22

Drilling fluid and method for drilling a wellbore

#48
20170152427
2017-06-01

High density aqueous well fluids

#49
20170152426
2017-06-01

SOLIDS SUSPENSION WITH NANOPARTICLE-ASSOCIATED VISCOELASTIC SURFACTANT MICELLAR FLUIDS

#50
20170145284
2017-05-25

HIGH-DENSITY COMPLETION BRINES

#51
20170114266
2017-04-27

Rare earth-containing compounds to enhance performance of downhole treatment compositions

#52
20170088762
2017-03-30

High density brine with low crystallization temperature

#53
20170058178
2017-03-02

Drilling fluid and method for drilling in coal-containing formations

#54
20160355406
2016-12-08

Methods to recover cesium formate from a mixed alkali metal formate blend

#55
20150275064
2015-10-01

Method of chemically delaying peroxygen based viscosity reduction reactions

#56
20150152033
2015-06-04

Methods to recover cesium formate from a mixed alkali metal formate blend

#57
20140357534
2014-12-04

METHODS, APPARATUS, AND SENSORS FOR TRACING FRAC FLUIDS IN MINERAL FORMATIONS, PRODUCTION WATERS, AND THE ENVIRONMENT USING MAGNETIC PARTICLES

#58
20140349894
2014-11-27

NANOFLUIDS AND METHODS OF USE FOR DRILLING AND COMPLETION FLUIDS

#59
20140291025
2014-10-02

Maintaining shale stability by pore plugging

#60
20130210683
2013-08-15

Method for drilling using a drilling and completion fluid comprising a phosphate based blend

#61
20130206479
2013-08-15

Drilling fluid and method for drilling in coal-containing formations

#62
20130130945
2013-05-23

Drilling fluids having reduced sag potential and related methods

#63
20130126243
2013-05-23

Drilling fluid and method for drilling a wellbore

#64
20120245059
2012-09-27

Use of high ratio aqueous alkali silicates in drilling fluids

#65
20120184468
2012-07-19

Composition and method for dissipating heat underground

#66
20120165231
2012-06-28

Drilling fluids having reduced sag potential and related methods

#67
20120157355
2012-06-21

Phosphate based blend for drilling and completion fluid

#68
20120015852
2012-01-19

Nanofluids and methods of use for drilling and completion fluids

#69
20100326728
2010-12-30

Mineral-based drilling fluid and drilling method

#70
20090314549
2009-12-24

Maintaining shale stability by pore plugging

#71
20090253593
2009-10-08

SOLID PRODUCT FOR PREPARING A DRILLING FLUID

#72
20090008334
2009-01-08

Method for treatment of high pH/silica brines

#73
20080200350
2008-08-21

Process fluid

#74
20080169130
2008-07-17

WELLBORE FLUIDS FOR CASING DRILLING

#75
20080153720
2008-06-26

Solids suspension with nanoparticle-associated viscoelastic surfactant micellar fluids

#76
20060108150
2006-05-25

Drilling and cementing with fluids containing zeolite

#77
20060054359
2006-03-16

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

#78
20050205834
2005-09-22

Composition and method for dissipating heat underground

#79
20050166802
2005-08-04

Grout compositions having high thermal conductivities and methods of using the same

#80
18629410
2025-07-29

Drilling fluid additives for high-density reservoir drilling fluids

#81
18180530
2024-06-11

Thermochemical fluid injection to prevent cool front invasion in COgeothermal reservoirs

#82
17505362
2022-05-31

Fiber silica composite microsphere for shale stratum, drilling fluid and preparation method and use thereof

#83
17454251
2023-02-07

Method and drilling system for mitigating lost circulation with basaltic particles

#84
16887869
2021-01-12

Modified polyhistidine suitable for being used as a supramolecular shale inhibitor, method of preparing the same and its application in water-based drilling fluids