| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_023f41cf8769106047bd89b64e05d9aa
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_64ec033daa290ae22642d8f6c1933c97 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B21-062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-206
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-203
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B21-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-05 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-05 |
| filingDate |
2013-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2017-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f301ec894801a341ba4d2196c7a62d6 |
| publicationDate |
2017-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9670394-B2 |
| titleOfInvention |
Drilling fluid and method for drilling a wellbore |
| abstract |
A method for drilling a wellbore into a formation uses a mixed metal-viscosified drilling fluid including at least 1% potassium salt and/or at least 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a formation. An anionic thinner may be added if the clay concentration of the drilling fluid reaches a problematic level to adversely affect pumpability of the fluid. |
| priorityDate |
2007-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |