| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_989ecca69fc47fadd546bf9a0db59629 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F11-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E10-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-25
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-74 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F11-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-25
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-74 |
| filingDate |
2013-12-13^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2017-01-10^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_81136efd91e62141d88dc301ed04e10f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_69a56213339d28103e17b4b87519158b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_312a5ef78b4fd44770b6d55773e0150f |
| publicationDate |
2017-01-10^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9540560-B2 |
| titleOfInvention |
Methods and systems for acidizing subterranean formations |
| abstract |
A method for acidizing subterranean formations may include providing a treatment fluid comprising an aqueous carrier fluid, an acid, and a chelating agent comprising N-(phosphonomethyl)iminodiacetic acid, the treatment fluid having a pH at or below that at which carboxylic or phosphonic acid groups of the N-(phosphonomethyl)iminodiacetic acid are protonated and the chelating agent is ineffective for complexing a metal ion; introducing the treatment fluid into a wellbore penetrating a subterranean formation comprising a carbonate mineral; reacting the acid with the carbonate mineral in the presence of the chelating agent, such that the acid at least partially spends as the pH of the treatment fluid rises; and complexing a metal ion with the chelating agent once the pH of the treatment fluid rises above a pK a value for one or more of the carboxylic or phosphonic acid groups of the N-(phosphonomethyl)iminodiacetic acid. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11041108-B2 |
| priorityDate |
2013-12-13^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |