http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2999725-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_121810e3332d8b2af6e31365a177aaf3 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2343-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-075 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-887 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-882 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-70 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-68 |
| filingDate | 2014-05-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf24616b7b32e8f438faec07b83e1e84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eda5032ffba0b0ed1173f6bb4bbfa192 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ebe72955fa583d5c0e92d87a5156bb67 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2bd12b1a978e0ecc5fdec2ed721e2891 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a5fe4e859b9372b519b9aa4eaff26d51 |
| publicationDate | 2016-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-2999725-A1 |
| titleOfInvention | Temperature-stable, electrolytic hydrogel and method for stimulating crude oil and natural gas deposits |
| abstract | The invention relates to a temperature-stable hydrogel comprising electrolytic water and a copolymer cross-linked to multivalent metal ions. The invention is characterized in that the copolymer contains at least structural units which are derived at up to 0.005-20 wgt.-% from an ethylenically unsaturated phosphonic acid and alkali metal salts thereof and/or ammonia salts, up to 5-40 wgt.-% from an ethylenically unsaturated sulfuric acid and alkali metal salts thereof and/or ammonia salts and up to 5-94.995 wgt.-% from an amide of an ethylenically unsaturated carboxylic acid selected from the group of acrylamide, methacrylamide and/or C1-C4 alkyl derivatives, wherein the percentages are based on the total mass of the monomers used during copolymerization, that the multivalent metal ions for cross-linking of the copolymers belong to the groups IIIA, IVB, VB, VIIB and/or VIIIB of the periodic system of elements, and that the electrolyte content of the hydrogel equals between 0.075 and 25 wgt.-% based on the total mass of the hydrogel. The electrolytic hydrogel can preferably be used for hydraulic fracturing of crude oil or natural gas deposits and for reservoir stimulating of underground waters and is characterized by a very good resistance to saline waters. |
| priorityDate | 2013-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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