Compositions for drilling of boreholes or wells Compositions for treating boreholes or wells

CCHEMISTRY METALLURGY C09Paints, dyes C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K8/00Compositions for drilling of boreholes or wells Compositions for treating boreholes or wells

C09K8/02Well-drilling compositions C09K8/03Specific additives for general use in well-drilling compositions C09K8/032Inorganic additives C09K8/035Organic additives C09K8/04Aqueous well-drilling compositions C09K8/05containing inorganic compounds only C09K8/06Clay-free compositions C09K8/08containing natural organic compounds C09K8/10Cellulose or derivatives thereof C09K8/12containing synthetic organic macromolecular compounds or their precursors C09K8/14Clay-containing compositions C09K8/145characterised by the composition of the clay C09K8/16characterised by the inorganic compounds other than clay C09K8/18characterised by the organic compounds C09K8/20Natural organic compounds or derivatives thereof C09K8/203Wood derivatives C09K8/206Derivatives of other natural products C09K8/22Synthetic organic compounds C09K8/24Polymers C09K8/26Oil-in-water emulsions C09K8/265containing inorganic additives C09K8/28containing organic additives C09K8/32Non-aqueous well-drilling compositions C09K8/34Organic liquids C09K8/36Water-in-oil emulsions C09K8/38Gaseous or foamed well-drilling compositions C09K8/40Spacer compositions C09K8/42Compositions for cementing C09K8/422specially adapted for sealing expandable pipes C09K8/424using "spacer" compositions C09K8/426for plugging C09K8/428for squeeze cementing C09K8/44containing organic binders only C09K8/46containing inorganic binders C09K8/467containing additives for specific purposes C09K8/473Density reducing additives C09K8/48Density increasing or weighting additives C09K8/487Fluid loss control additives Additives for reducing or preventing circulation loss C09K8/493Additives for reducing or preventing gas migration C09K8/50Compositions for plastering borehole walls C09K8/501using spacer compositions C09K8/502Oil-based compositions C09K8/504Compositions based on water or polar solvents C09K8/5045containing inorganic compounds C09K8/506containing organic compounds C09K8/508macromolecular compounds C09K8/5083obtained by reactions only involving carbon-to-carbon unsaturated bonds C09K8/5086obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds C09K8/512containing cross-linking agents C09K8/514of natural origin C09K8/516characterised by their form or by the form of their components C09K8/518Foams C09K8/52Compositions for preventing, limiting or eliminating depositions C09K8/524organic depositions C09K8/528inorganic depositions C09K8/532Sulfur C09K8/536characterised by their form or by the form of their components C09K8/54Compositions for in situ inhibition of corrosion in boreholes or wells C09K8/56Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof C09K8/565Oil-based compositions C09K8/57Compositions based on water or polar solvents C09K8/572containing inorganic compounds C09K8/575containing organic compounds C09K8/5751Macromolecular compounds C09K8/5753obtained by reactions only involving carbon-to-carbon unsaturated bonds C09K8/5755obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds C09K8/5756containing cross-linking agents C09K8/5758of natural origin C09K8/58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil C09K8/582characterised by the use of bacteria C09K8/584characterised by the use of specific surfactants C09K8/588characterised by the use of specific polymers C09K8/592Compositions used in combination with generated heat C09K8/594Compositions used in combination with injected gas C09K8/60Compositions for stimulating production by acting on the underground formation C09K8/601using spacer compositions C09K8/602containing surfactants C09K8/604Polymeric surfactants C09K8/605containing biocides C09K8/607specially adapted for clay formations C09K8/608Polymer compositions C09K8/62Compositions for forming crevices or fractures C09K8/64Oil-based compositions C09K8/66Compositions based on water or polar solvents C09K8/665containing inorganic compounds C09K8/68containing organic compounds C09K8/685containing cross-linking agents C09K8/70characterised by their form or by the form of their components C09K8/703Foams C09K8/706Encapsulated breakers C09K8/72Eroding chemicals C09K8/725Compositions containing polymers C09K8/74combined with additives added for specific purposes C09K8/76for preventing or reducing fluid loss C09K8/78for preventing sealing C09K8/80Compositions for reinforcing fractures C09K8/805Coated proppants C09K8/82Oil-based compositions C09K8/84Compositions based on water or polar solvents C09K8/845containing inorganic compounds C09K8/86containing organic compounds C09K8/88macromolecular compounds C09K8/882obtained by reactions only involving carbon-to-carbon unsaturated bonds C09K8/885obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds C09K8/887containing cross-linking agents C09K8/90of natural origin C09K8/905Biopolymers C09K8/92characterised by their form or by the form of their components C09K8/94Foams