http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EA-036986-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9731233d8160d4f79c558937e912555 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-0043 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-424 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-467 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-40 |
| filingDate | 2016-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b088ef135612b6560e29bac2135e4255 |
| publicationDate | 2021-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EA-036986-B1 |
| titleOfInvention | WELLBORE CEMENTING METHOD |
| abstract | A method for cementing a wellbore containing a drilling fluid, comprising pumping a cement separating fluid into the wellbore to displace the drilling fluid; pumping a cement slurry into the wellbore after pumping the cement separating fluid; curing cement in a slurry for cementing a wellbore, wherein the cement release fluid comprises an aqueous cement release fluid carrier and a preformed synthetic polymer swellable in the aqueous cement release agent in an amount effective to displace the drilling fluid during cementing, and the prepared synthetic polymer contains a copolymer of (meth)acrylamide with maleic anhydride, vinyl acetate, ethylene oxide, ethylene glycol, acrylonitrile, or a combination thereof containing at least one of the above polymers; poly(acrylamide) having crosslinks derived from polyethylene glycol diacrylate; poly(acrylic) acid having crosslinks derived from a vinyl ester oligomer; or poly(ethylene glycol) partially grafted with sodium salt of poly(acrylic acid); and the preformed synthetic polymer is present in the cement separating fluid at a concentration of 4.53 to 90.7 kg per 3785.41 liters of aqueous cement separating fluid carrier. |
| priorityDate | 2015-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 179.