http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-212803146-U
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a61f9c70cf86eedc840b559a709fb95e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-127 |
| filingDate | 2019-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bd694f00d891261219b6bcb845c7abde http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_77defdfcd8820c2e8971697531c9abb9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e52b098ca901de2ba0c2e99c1d64b89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_25a2dc8e4810e91c162880672db52227 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3eb9c1c1f728129ed92f977a4f595fa8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5200128c616a9acb4d57c7b9913ccd94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_acc7e0047e3b97c04aa6a460f6d6d474 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d805a2a940636a6580fd914f429c773b |
| publicationDate | 2021-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-212803146-U |
| titleOfInvention | Center tube capable of freely constructing limiting step |
| abstract | The utility model discloses a freely found center tube of spacing step, include: the central tube is provided with an annular groove, the limiting locking block, the limiting ring and the limiting pin, the central tube does not need to be turned by a large number of large-diameter materials to form steps, welding processing is also not needed, the outer diameter of the central tube can be free of step differences, therefore, the limiting steps can be freely constructed in infinite multistage, assembly accessories can be installed from any direction, the central tube is an integral accessory, and the mechanical property is optimal; both realized the various flexibility of center tube function, guaranteed the mechanical safety of center tube again, improved assembly efficiency by a wide margin, simultaneously can furthest practice thrift raw and other materials, the utility model discloses but wide application in the multiple downhole tool's of oil industry center tube design and manufacturing. |
| priorityDate | 2019-12-28-04:00^^<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/SID419514609 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID7753 |
Total number of triples: 21.