http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104789197-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-06 |
| filingDate | 2015-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104789197-B |
| titleOfInvention | A kind of salt tolerant high temperature-resistance oil well cement starches the preparation method of fluid loss agent |
| abstract | The invention discloses the preparation method that a kind of salt tolerant high temperature-resistance oil well cement starches fluid loss agent, comprise the following steps：(1) it is according to mol ratio, sulfonic group monomer：Acrylamide monomer：Acrylic monomers=1.0: 0.5: 0.5, weigh raw material；(2) raw material in step (1) is put into reactor, the stirring that adds water is until dissolving；The water is added according to concentration of polymer solution for 20%；(3) NaOH is added, pH value of solution=5~6 are adjusted；(4) heated solution to temperature is 75 DEG C；(5) nitrogen is led in step (4) described solution 15 minutes；(6) ammonium persulfate of monomer mass 0.3% is added, product solution is made in insulation reaction 24h；Product of the present invention has good high temperature drop dehydration effect, and its temperature resistance salt resistance ability is protruded；Broad application temperature range；There is good compatibility with other conventional cement additives, the performance to the requirement of the casing and cementings such as the rheological characteristic of cement mortar, stability, thickening time, intensity has no adverse effects. |
| priorityDate | 2015-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.