| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_989ecca69fc47fadd546bf9a0db59629 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L5-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-0033
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B11-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B15-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-685
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B31-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B31-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-0024
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-90
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B31-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-0096
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L3-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L3-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L1-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L1-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-08 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-25
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-68 |
| filingDate |
2012-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2014-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3dd0b47b6b36a688804e2d1cdeb5389a |
| publicationDate |
2014-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
AU-2012201448-B2 |
| titleOfInvention |
Modification of solid polysaccharide with transesterification agent |
| abstract |
OF THE INVENTION Polysaccharides are reacted with transesterification agents forming modified products that: (1) have increased viscosifying efficiency, i.e., higher viscosities at reduced concentrations compared to the unmodified polysaccharide; or (2) are insolubilized at temperature ranges for which the unmodified polysaccharide would hydrate fully; or (3) both properties. In some cases, the insolubilized polysaccharides can be activated to dissolve and viscosify at specific temperature ranges by using pH modifiers. A method of treating a well is provided, including the steps of: (a) forming a treatment fluid comprising water and a modified polysaccharide, wherein the modified polysaccharide is characterized by having been made by the process of combining: (i) a water-soluble polysaccharide, wherein the polysaccharide is in a solid form during the combining step; and (ii) a transesterification agent, wherein the transesterification agent is in liquid form; wherein the step of combining is in the presence of less than 10% by weight water relative to the water-soluble polysaccharide and wherein any water present is at a pH of 8 or less; and (b) introducing the treatment fluid into the well. 27/02112ckl 9808specification.2 |
| priorityDate |
2011-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |