| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2c8abd22b36e9c94090f9889ecf27cb5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_205ed467ee37eb7413662b5e118197f7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8bde08620d2b74bf9c80bb72f98cf3d0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa167897a816e0e598235c706de2c370 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-903 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-512
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-565
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-5756
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-502 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-565
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-502
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-512
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-575
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-138 |
| filingDate |
2002-07-19^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2006-09-06^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c645cea170ac263a8dae605ba3af3c91
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_604f75f288864ec30a9c1764db151de7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d2c9fb880f23ecc4815b246a08e4c332 |
| publicationDate |
2006-09-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1412614-B1 |
| titleOfInvention |
Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone |
| abstract |
A plugging fluid for plugging a subterranean formation zone surrounding a drill hole comprises an emulsion comprising a dispersed aqueous phase containing an aqueous base and a continuous hydrophobic phase containing a polymer consisting of a grafted cellulose ether derivative, a surfactant and a crosslinking activator of the polymer. The polymer is preferably 2-hydroxyethyl cellulose grafted with vinyl phosphonic acid. Upon shearing, preferably through the drilling bit, the emulsion inverts so that the rupture of the emulsion droplets releases the crosslinking activator into the water phase thus forming a gel structure. |
| priorityDate |
2001-08-02^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |