| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d53347eec34cfeab996996b4019e66e7 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F251-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L51-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L51-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L5-08 |
| filingDate |
2015-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2016-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6e2b33dc93a848b809b12a519134366
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0924250f80782a22c92c65b9dad8579b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a505bfafd6869681c7d831e4673767f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c0e701bb060065157970b5bf3e14657
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_26bf06b8710996899a3c67f3f5c5b9ac
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3af8726480e1c62463e9414fff74b201 |
| publicationDate |
2016-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9410068-B2 |
| titleOfInvention |
Method for preparation of biomimetic polymer for stabilizing wellbore and drilling fluid |
| abstract |
The present invention provides a biomimetic polymer for stabilizing wellbore, a method for preparation of the biomimetic polymer, and a drilling fluid. The polymer contains carboxymethyl chitosan that serves as a backbone and dopamine-derived groups grafted on the backbone. The polymer provided in the present invention can improve the strength of shale in the wellbore, seal the shale pores and reduce the filter loss of drilling fluid, and thereby attains an effect of stabilizing the wellbore in shale formation in drilling process. |
| priorityDate |
2014-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |