QZ3NB—650钻井泥浆泵
QZ3NB-650钻井泥浆泵是青州石油机械厂研制的钻井泥浆泵；设计特点是优选了参数，适当地增长了冲程，合理地降低了冲数，改善了泵的吸入性能，延长了易损件的寿命。该泵主要用于油田及其它工矿企业；用于钻井，修井以及远距离输送液体介质等作业；主要配置15型钻机。
该系列泵严格按照石油工业部SY5138标准生产，并按照标准进行出厂试验
QZ3NB—650 Drilling mud pump
The SL3NB-650 mud pump is researched and manufactured by Qingzhou petroleum machinery factory. The design characteristic is an optimization of parameter. it can increase the stroke properly, lower the speed reasonably, improve the suction capability of the pump, prolong the life of the wearing parts. The pumps are used for oil-field, other industrial and mining establishments and for the oil drilling, well work over. They are mainly installed on 1500m rig.
The series pump produces according to SY5138 of the petroleum industry standard strictly, and carry through factory’s experiment according to the standard
QZ3NB—650 Drilling mud pump technical parameter
| 型式 Type | 三缸单作用活塞泵 Triplex Single Acting Piston Pump | 冲程长度 Stroke Length: | 203 mm |
| 额定功率 Rated power | 650HP （485KW） | 吸入管径 Suction inlet | Φ254 mm |
| 额定转速 Rated speed | 150 SPM | 排出管径 Discharge outlet | Φ83 mm |
| 齿轮传动比 Gear ratio | 4.07 | 重量Weights | 13600 Kg |
机械效率按90% 容积效率按100%
| 泵速 Pump Speed (SPM) | 缸套直径Liner Size (mm) | |||||||
| 110 | 120 | 130 | 140 | 150 | 160 | 170 | 180 | |
| 理论排量Theoretical Displacement (L/s) | ||||||||
| 150 | 14.5 | 17.2 | 20.2 | 23.4 | 26.9 | 30.6 | 34.6 | 38.8 |
| 130 | 12.6 | 14.9 | 17.5 | 20.3 | 23.3 | 26.5 | 30 | 33.6 |
| 110 | 10.6 | 12.6 | 14.8 | 17.2 | 19.7 | 22.4 | 25.4 | 28.5 |
| 额定压力 MPa Pressure Rating | 30 | 25.5 | 21.6 | 18.6 | 16.2 | 14.2 | 12.6 | 11.2 |
Based on 90% mechanical efficiency and 100% volumetric efficiency.