http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102900400-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6a6f422b091ba12ea61d4adbf1b0e8e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-00 |
| filingDate | 2012-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a99907b6beb5050ccdd09a3399c08fc0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9638b363681042d5060196466bca7166 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56c0d842f8c54f2ebce002a21faf8fa9 |
| publicationDate | 2015-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102900400-B |
| titleOfInvention | Compact hydraulic oil pumping machine adopting composited pneumatic-hydraulic cylinder |
| abstract | The invention discloses a compact hydraulic oil pumping machine adopting a composited pneumatic-hydraulic cylinder, which comprises a power unit and an oil pumping unit, wherein the oil pumping unit is an executing part of the hydraulic oil pumping machine, directly placed at a wellhead and used for driving a polish rod; and the power unit is connected with the oil pumping unit through an oil pipe and a control cable, and used for controlling and driving the oil pumping unit to move. A closed hydraulic circuit of a three-cavity composited pneumatic-hydraulic cylinder is controlled by using a variable-rotational-speed pump, the up-and-down motion of a piston rod of the composited pneumatic-hydraulic cylinder drives a movable block, and the movable block lifts a beam hanger at the tail end of a steel wire rope wound around the movable block so as to realize an oil pumping process of a sucker-rod pump. A balance weight cavity of the composited pneumatic-hydraulic cylinder is connected with a nitrogen tank so as to realize pneumatic balance. The three-cavity composited pneumatic-hydraulic cylinder and the nitrogen tank both are functional parts and brackets of the oil pumping machine, and a walking beam and a truss are not required. An effect of pneumatic balance and an effect of variable-frequency valveless direct drive are simultaneously achieved by using the three-cavity composited pneumatic-hydraulic cylinder; and the compact hydraulic oil pumping machine is large in load capacity, compact in structure, steplessly regulated in stroke and jig frequency, small in reactive loss of motors, and high in oil pumping efficiency. |
| priorityDate | 2012-09-21-04:00^^<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/compound/CID947 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419556970 |
Total number of triples: 15.