| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be2258efa1dd0212d91e87b0487f4ede |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B34-102
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B33-14 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B34-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-134
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-16 |
| filingDate |
2005-07-25^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_19bf562162f6993f3d156c54360c28de
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dffa1e1c64e307f89944df10875a5523
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4d12b2689d9ef7ce4c4c8746f36bd88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bc56193253e9d81b9d739270217ea953
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6124239f33ebe64124f91bebafcc6384
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_de84e42a11c83aabdc2585b4f1939686
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c502cec910f4d764ec8a13852b218e43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4c1b475a7b9f379665297483a8e920d7 |
| publicationDate |
2006-03-09^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2646556-A1 |
| titleOfInvention |
Casing shoes and methods of reverse-circulation cementing of casing |
| abstract |
A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulation valve; reconfiguring the circulation valve by contact of the activator material with the reactive material; and reverse-circulating a cement composition in the well bore until the reconfigured circulation valve decreases flow of the cement composition. A circulation valve for cementing casing in a well bore, the valve having: a valve housing connected to the casing and comprising a reactive material; a plurality of holes in the housing, wherein the plurality of holes allow fluid communication between an inner diameter of the housing and an exterior of the housing, wherein the reactive material is expandable to close the plurality of holes. |
| priorityDate |
2004-08-30^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |