ClassID:

104280

C09K8/40 - page 2 - 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 Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses

Recent Application in this class:
#301
20100256025
2010-10-07

Viscoelastic surfactants and methods of making and using same

#302
20100243236
2010-09-30

Nanoparticle-densified Newtonian fluids for use as cementation spacer fluids and completion spacer fluids in oil and gas wells

#303
20100218949
2010-09-02

Swellable elastomers and associated methods

#304
20100210482
2010-08-19

Wellbore servicing fluids comprising cationic polymers and methods of using same

#305
20100184631
2010-07-22

PROVISION OF VISCOUS COMPOSITIONS BELOW GROUND

#306
20100116170
2010-05-13

Cement compositions comprising crystalline organic materials and methods of using same

#307
20100044057
2010-02-25

Treatment Fluids Comprising Pumicite and Methods of Using Such Fluids in Subterranean Formations

#308
20100044040
2010-02-25

Method of installing sand control screens in wellbores containing synthetic or oil-based drilling fluids

#309
20100025039
2010-02-04

Cement compositions and methods utilizing nano-clay

#310
20090308611
2009-12-17

Wellbore servicing compositions comprising a density segregation inhibiting composite and methods of making and using same

#311
20090156436
2009-06-18

Spacer fluid additive

#312
20090145602
2009-06-11

Cement compositions comprising crystalline organic materials and methods of using same

#313
20090095475
2009-04-16

Cement compositions comprising a high-density particulate elastomer and associated methods

#314
20090082230
2009-03-26

Well Treatment Fluids Containing Nanoparticles and Methods of Using Same

#315
20090038855
2009-02-12

Variable density fluids and methods of use in subterranean formations

#316
20080251252
2008-10-16

Polymeric gel system and methods for making and using same in hydrocarbon recovery

#317
20080202749
2008-08-28

Polymeric gel system and use in hydrocarbon recovery

#318
20080060820
2008-03-13

Method to control the physical interface between two or more fluids

#319
20080060811
2008-03-13

METHOD TO CONTROL THE PHYSICAL INTERFACE BETWEEN TWO OR MORE FLUIDS

#320
20080039347
2008-02-14

Treatment fluids comprising clarified xanthan and associated methods

#321
20080020961
2008-01-24

Low Molecular Weight Graft Copolymers

#322
20080020948
2008-01-24

Sulfonated graft copolymers

#323
20080017376
2008-01-24

Swellable elastomers and associated methods

#324
20070287638
2007-12-13

Use of dicarbonyl compounds for increasing the thermal stability of biopolymers in the field of oil and gas exploration

#325
20070284103
2007-12-13

Treatment Fluids Comprising Vitrified Shale and Methods of Using Such Fluids in Subterranean Formations

#326
20070261849
2007-11-15

Servicing a wellbore with an aqueous based fluid comprising a clay inhibitor

#327
20070012447
2007-01-18

Inverse emulsion polymers as lost circulation material

#328
20060270564
2006-11-30

Subterranean fluids and methods of using these fluids in subterranean formations

#329
20060258545
2006-11-16

Well completion spacer fluids containing fibers

#330
20060254770
2006-11-16

Method and composition for cleaning a well bore prior to cementing

#331
20060217270
2006-09-28

Wellbore servicing fluids comprising resilient material

#332
20060188651
2006-08-24

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

#333
20060148657
2006-07-06

Zeolite compositions having enhanced compressive strength

#334
20060137876
2006-06-29

Zeolite compositions having enhanced compressive strength

#335
20060096758
2006-05-11

Method of treating an oil or gas well with biodegradable low toxicity fluid system

#336
20060096757
2006-05-11

Method of treating an oil or gas well with biodegradable low toxicity fluid system

#337
20060081372
2006-04-20

Treatment fluids comprising vitrified shale and methods of using such fluids in subterranean formations

#338
20060079408
2006-04-13

Composition for decreasing lost circulation during well operation

#339
20050230116
2005-10-20

Methods and compositions for use with spacer fluids used in subterranean well bores

#340
20050034867
2005-02-17

Subterranean fluids and methods of cementing in subterranean formations

#341
20050034866
2005-02-17

Subterranean fluids and methods of using these fluids in subterranean formations

#342
17816865
2023-11-07

Cement spacer fluid with polyethyleneimine hydrochloride salt as a shale inhibitor

#343
16563479
2020-08-25

Wellbore servicing composition with controlled gelation of cement kiln dust and methods of making and using same

#344
16023155
2019-11-19

Cement spacer fluid comprising quaternary surfactant, viscosifier, and proppant