| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_237c12e5893de438efd0a9cf3f0c5167 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L77-06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-32 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L77-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B21-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-26 |
| filingDate |
2003-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c89463edabcc92323d72c7c6dc86d23
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f1815c3ab3c4e36493eada735bb9e0bb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f6e8cb1cc58f632f68c3b7e052b1972
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b71167242dc5109da86fa5ad7f16c6c5 |
| publicationDate |
2009-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-2058381-A1 |
| titleOfInvention |
Compositions for drilling fluids useful to provide flat temperature rheology to such fluids over a wide temperature range and drilling fluids containing such compositions |
| abstract |
The invention is of oil-based drilling fluids including invert emulsion fluids that are able to maintain a relatively consistent rheological profile over a wide temperature range. The invention also includes new additives that enable the preparation of drilling fluids with viscosities that are less affected by temperature over a temperature range from less than about 40°F to more than about 250°F compared to conventional fluids. These additives are based on reaction products of polyamines and carboxylic acids with two or more carboxylic moieties combined with alkoxylated amines and fatty acid amides. In addition, this invention permits the use of reduced amounts of organoclay rheological additives in drilling fluids. |
| priorityDate |
2002-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |