http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108117621-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-585 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-06 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F226-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-035 |
| filingDate | 2016-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108117621-B |
| titleOfInvention | Tackifying calcium salt resistant polymer filtrate reducer and preparation method thereof |
| abstract | The invention discloses a viscosity-increasing type calcium salt resistant polymer fluid loss additive and a preparation method thereof. The fluid loss agent is obtained by polymerizing the following raw materials of monomers in percentage by mass: 5-40% of N-vinyl amide monomer; 5-30% of acrylamide monomer; 40-85% of a vinyl-containing sulfonic acid monomer; 2-20% of acrylic monomers; 1-10% of methacrylate monomer. The filtrate reducer of the invention has reasonable interaction with clay particles under high calcium salt by controlling the proportion of adsorption groups and hydration groups on polymer molecular chains, so that the filtrate reducer is in a proper dispersion state, forms a flexible, thin and compact filter cake with low permeability, reduces the filtrate loss of drilling fluid, has larger molecular weight, has small viscosity reduction rate in high calcium salt aqueous solution compared with the existing filtrate reducer of salt-resistant polymer, and has certain coating, inhibiting and viscosity-increasing cutting effects in high calcium salt drilling fluid. |
| priorityDate | 2016-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 93.