http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111088956-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B34-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B33-13 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-13 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B34-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B23-00 |
| filingDate | 2019-12-04^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-11^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-11^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111088956-B |
| titleOfInvention | Magnetorheological fluid-based temporary plugging valve changing device and method for oil-gas wellhead |
| abstract | The invention belongs to the technical field of petroleum engineering, and particularly provides an oil-gas wellhead temporary plugging valve-changing device based on magnetorheological fluid, which comprises a liquid storage tank, a temporary plugging fluid injection unit, a pressure release valve, a magnetizing device and a blowout pipeline, wherein the liquid storage tank is connected with an inlet of the temporary plugging fluid injection unit, an outlet of the temporary plugging fluid injection unit can be connected with an injection valve of a wellhead Christmas tree through a pipeline, the pressure release valve is connected with a target valve of the wellhead Christmas tree through a pipeline, an outlet valve of the wellhead Christmas tree is connected with the blowout pipeline, and the magnetizing device is connected outside a surface casing of an oil-gas well. |
| priorityDate | 2019-12-04^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 |
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