http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11414589-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1b7a5c546db0678dbd6f9594fc43f2d6 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B21-003 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B37-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-524 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-528 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B21-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B37-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-528 |
| filingDate | 2020-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5fb43bd30a1844838c5635a450cc813d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_75344a4ad08e035ba0915873aec6bcd0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c0f0f57b18aed8b4754c6286db922ec4 |
| publicationDate | 2022-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-11414589-B2 |
| titleOfInvention | Method of removing calcium carbonate-containing oil-based filter cake using a biodegradable acid solution |
| abstract | A method of removing calcium carbonate-containing oil-based filter cake from a wellbore involving contacting the calcium carbonate-containing oil-based filter cake with a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent. The method is performed at a pressure of 200 to 400 psi and a temperature of 50 to 125° C. The method removes calcium carbonate-containing oil-based filter cake made of a water-in-oil emulsion, calcium carbonate, a primary emulsifier, a secondary emulsifier, a contamination treatment agent, a viscosity control agent, a filtration control agent. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent that meets OECD 301B thresholds for ready biodegradability. |
| priorityDate | 2020-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 143.