http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104481459-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-00 |
| filingDate | 2014-11-18^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-02-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-02-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104481459-B |
| titleOfInvention | Oil pumping system for screw pump |
| abstract | The invention discloses an oil pumping system for a screw pump. The oil pumping system includes a bidirectional anti-rotating anchor, a stabbing rod, a releasing packer, a tension spring valve and a packer sealing switch, and is characterized in that the bidirectional anti-rotating anchor is provided with a plurality of sealing slots in which clamping blocks are installed, and a plate spring is arranged between each clamping block and the main body; the bidirectional anti-rotating anchor is connected to the stabbing rod which passes through the releasing packer, the tension spring valve and an oil tube concentrically; a distance is reserved between the lower end face of an annular bulge at the connecting section at the upper end of the stabbing rod and the upper end face of the releasing packer; the outer tube of the stabbing rod and the central tube of the releasing packer are connected by a pin; the releasing packer, the tension spring valve, the oil tube and the packer sealing switch are connected together; a distance is reserved between the lower end face of the built-in ball seat of the sealing switch and the inner seam allowance of the lower end of the main body of the sealing switch. According to the oil pumping system for the screw pump, a water plugging assembly and a production tubular column assembly can integrally descend a well, thus being convenient to connect and good in interchangeability; furthermore, the function of avoiding spraying in the oil tube, preventing the water plugging assembly from dropping and avoiding pressing the oil tube are provided, thus saving operating cost and shortening operating time. |
| priorityDate | 2014-11-18^^<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/substance/SID419512635 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 |
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