CYJ3-1.2-7HB (300kg/1.2m/7kN·m/Crank Balance)
CYJ3-1.2-7HB Crank Balance pumping unit delivers stable lifting performance up to 300 kg with a 1.2 m stroke and 7 kN·m torque. Improve well efficiency, reduce vibration, and lower operating costs for reliable daily production.
- Brand: HNSZ
- SKU: 34
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CYJ3-1.2-7HB (300kg/1.2m/7kN·m/Crank Balance)
1. Model Code Meaning (Compliant with Industry Standard GB/T 29021-2012)
CYJ: Conventional Beam Pumping Unit
3: Maximum polished rod load 3 t (30 kN)
1.2: Maximum polished rod stroke 1.2 m
7: Maximum allowable torque of gearbox crankshaft 7 kN·m
H: Gearbox adopts involute gear drive
B: Balance mode is crank balance
2. Core Structure and Performance
It is a light-duty pumping unit with a simple and reliable overall structure, suitable for shallow well production scenarios.
The transmission system adopts two-stage involute gear reduction, featuring low operating noise and low maintenance difficulty.
The crank counterweight can be fine-tuned in multiple gears, enabling convenient balance adjustment and adapting to the load characteristics of low-production small-displacement oil wells.
3. Application Scenarios
Ideal for shallow wells with a well depth range of 300-800 m.
Suitable for low-production oil wells with a daily fluid output of 5-15 m³.
Applicable to conventional field operating conditions with an ambient temperature of -30℃ to 50℃.
It passed the ministerial appraisal in 1984 and was officially put into mass production by Sichuan Drilling & Production Equipment Factory, making it a mature model widely used in the early stage in China.
4. Complete Detailed Parameters
Core Parameters of Model Identification
Unit type: Conventional Beam Pumping Unit
Rated polished rod load: 30 kN (3 t)
Maximum polished rod stroke: 1.2 m
Maximum allowable torque of gearbox crankshaft: 7 kN·m
Balance mode: Crank Balance
Gearbox gear type: Involute Gear Drive
Operation Adaptation Parameters
Recommended stroke frequency range: 6 SPM, 9 SPM, 12 SPM
Adapted well depth: 300-800 m shallow well
Adapted daily fluid output: 5-15 m³ low-production small-displacement oil well
Applicable ambient temperature: -30℃ to 50℃ conventional field operating conditions
Basic Structural Parameters
Overall positioning: Light-duty Beam Pumping Unit
Transmission structure: Two-stage three-shaft reduction
Composition of core components: Base, Support, Beam, Horsehead, Crank-connecting rod mechanism, Gearbox, Brake device
Design service life of the unit: 8-15 years under normal operating conditions, which can be extended to more than 15 years with standardized maintenance