http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0320288-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_75a9b43328a2cbfcf60da8b223a321c7 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-467 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-145 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-04 |
| filingDate | 1988-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1995-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9fdc008fba8037bb5b1399645ba5893 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b2ff542b52e21fa20e49ce13474d5a04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92f410068404db5a4f6984292e0ef1dd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c833b353f4dc913714d383fbfa47918 |
| publicationDate | 1995-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0320288-B2 |
| titleOfInvention | Cementing oil and gas wells using converted drilling fluid |
| abstract | Wellbores are cemented with a cement composition formed from drilling fluid occupying the wellbore by circulating a quantity of drilling fluid mixed with a cement material and a dispersant such as a sulfonated styrene copolymer with or without an organic acid into the wellbore to displace the drilling fluid and to continuously convert the drilling fluid into the cement composition. The cement composition may be recirculated through the space in the wellbore to completely evacuate any drilling fluid not converted to cement so as to minimize any faults in the cement composition occupying the wellbore. A preflush composition containing the dispersant and being rheologoically compatible with both the drilling fluid and the drilling fluid converted to cement slurry may be used as a displacement fluid. |
| priorityDate | 1987-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 77.