ClassID:

104984

C09K2208/06 - CPC Classification

Classification description:

Aspects relating to compositions of drilling or well treatment fluids Structured surfactants, i.e. well drilling or treating fluids with a lamellar or spherulitic phase

Recent Application in this class:
#1
20250346800
2025-11-13

NANOBUBBLE FOR IMPROVING SCAVENGER EFFICIENCY

#2
20240141223
2024-05-02

ENVIRONMENTALLY FRIENDLY NANOSHALE INHIBITOR IN AQUEOUS-BASED WELLBORE FLUIDS

#3
20240034925
2024-02-01

Enhanced oil recovery with Janus nanoparticles

#4
20230392069
2023-12-07

POLYACRYLAMIDE-BASED SYMMETRIC BRANCHED POLYMER SURFACTANT AND A PROCESS FOR PREPARING THE SAME AND USE THEREOF

#5
20230313025
2023-10-05

Superheated phase changing nanodroplets for hydrocarbon reservoir applications

#6
20230265336
2023-08-24

COMPOSITION WITH FOAMING PROPERTIES

#7
20230167558
2023-06-01

Scale control in production fluids

#8
20220025248
2022-01-27

Enhanced oil recovery with janus nanoparticles

#9
20210380873
2021-12-09

Methods and compositions of using viscoelastic surfactants as diversion agents

#10
20210222052
2021-07-22

Gemini surfactants containing an arylene linker for clay swelling inhibition

#11
20210207020
2021-07-08

Method of removing calcium-containing water-based filter cake using a biodegradable acid solution

#12
20210189222
2021-06-24

Gemini surfactants containing an unsaturated linker for clay swelling inhibition

#13
20210122968
2021-04-29

Surfactants for enhanced oil recovery

#14
20200392398
2020-12-17

Loaded, sealed nanotubes for oil recovery

#15
20200208045
2020-07-02

N,N,N′,N′-tetradodecyl-substituted diphenyl ether sulfonate anionic Gemini surfactant and synthesis method thereof

#16
20200208044
2020-07-02

Nonionic Gemini surfactant of (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether and its synthesis method

#17
20200208040
2020-07-02

Core-shell structured anionic nano microemulsion system, and preparation and application thereof

#18
20200206706
2020-07-02

Core-shell structured non-ionic nanoemulsion system and preparation and use thereof

#19
20200199437
2020-06-25

DRILLING FLUID FOR HYDROCARBON WELLS AND MANUFACTURING PROCESS THEREOF

#20
20200157402
2020-05-21

Emulsifiers for direct emulsion drilling fluids

#21
20200010593
2020-01-09

Surfactant responsive emulsion polymerization micro-gels

#22
20190276725
2019-09-12

Ecofriendly emulsifier synthesis from esterified waste vegetable oil for wellbore drilling fluids

#23
20190161672
2019-05-30

Proppant Materials for Additive Delivery

#24
20190136119
2019-05-09

Tunable injection fluid based on natural gas liquids, gas, and nanoparticles for improved hydrocarbon recovery

#25
20190031951
2019-01-31

Methods and materials for controlled release of desired chemistries

#26
20190031940
2019-01-31

Ecofriendly emulsifier synthesis from esterified waste vegetable oil for wellbore drilling fluids

#27
20190016943
2019-01-17

Surfactant for enhanced oil recovery

#28
20180355236
2018-12-13

Surfactants for use in liquid suspensions of lightweight beads

#29
20180346798
2018-12-06

Nanosurfactants for improved and enhanced oil recovery applications

#30
20180010038
2018-01-11

Foam forming compositions comprising a particulate inorganic material

#31
20170335177
2017-11-23

PROPPANT MATERIALS FOR ADDITIVE DELIVERY

#32
20170321111
2017-11-09

Method for subterranean petroleum recovery using a surfactant blend

#33
20160304646
2016-10-20

Surfactant Responsive Emulsion Polymerization Micro-Gels

#34
20140341957
2014-11-20

Surfactant responsive dispersion polymerized micro-gels

#35
20140262262
2014-09-18

Compositions and Methods for the Controlled Release of Active Ingredients

#36
17823075
2023-07-25

Methods for preparing liquid-solid phase change proppant with a controllable particle size based on emulsified resin

#37
17708672
2023-07-25

Superheated phase changing nanodroplets for hydrocarbon reservoir applications

#38
16023155
2019-11-19

Cement spacer fluid comprising quaternary surfactant, viscosifier, and proppant