Core Purpose Description
This document focuses on a full range of pumping unit models, including CYJ, CYJY, CYJS, CYJP, CYJQ, CYJX, SCYJ, YCYJ series, which are exclusively compatible with onshore oilfield exploitation systems, especially suitable for conventional oil reservoirs, low-permeability oil reservoirs, and high-viscosity oil exploitation scenarios. It is tailored for oilfield operation enterprises, oil production technology service companies, and oilfield equipment maintenance institutions that demand high reliability, stable operation, and strong adaptability in long-term continuous oil extraction operations. These pumping units address pain points such as equipment shutdown, low oil extraction efficiency, and high maintenance costs caused by harsh oilfield environments (sand production, corrosion, extreme temperature), long-term high-load operation, and complex geological conditions. All products comply with relevant national standards (GB/T 29022-2012 "Beam Pumping Units" and SY/T 5044-2016 "Technical Conditions for Beam Pumping Units"), providing authoritative and reliable support for efficient, safe, and low-cost oilfield exploitation.
1. Conventional Beam Pumping Units
This category of pumping units adopts the classic beam structure design, featuring simple structure, mature technology, and easy maintenance. They solve pain points of high failure rate and difficult maintenance of complex-structured equipment in conventional oilfield exploitation. Suitable for large-scale conventional oil reservoirs with stable geological conditions and low sand content.
No. | Product Name | Model | Material | Main Wear Causes | Damage Prevention Precautions |
Conventional Beam Pumping Unit | CYJ500-9H | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel (quenched and tempered); Base: Q235B carbon steel (welded and normalized); Connecting rod: 45# carbon steel | 1. Beam hinge pin wear and looseness caused by long-term alternating load and insufficient lubrication; 2. Base corrosion and structural strength reduction caused by rainwater erosion and soil moisture in open-air oilfields | 1. Inject lithium-based grease into the hinge pin every 15 days, and check the wear amount regularly (allowable wear ≤ 0.5mm); 2. Paint the base with anti-corrosion paint every 6 months, and pad a moisture-proof cushion under the base to avoid direct contact with wet soil | |
Conventional Beam Pumping Unit | CYJ650-6.5H, CYJ650-13H | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Gearbox shell: HT250 gray cast iron; Counterweight: cast iron (concrete filled) | 1. Gear wear and pitting in the gearbox caused by impure lubricating oil and long-term high-speed operation; 2. Counterweight fixing bolt loosening and displacement caused by equipment vibration during operation | 1. Replace the gearbox lubricating oil every 2000 operating hours, and install an oil filter to ensure oil cleanliness (NAS 8 level); 2. Check the counterweight fixing bolt tightness every 7 days with a torque wrench, and apply anti-loosening glue to the bolt threads | |
Conventional Beam Pumping Unit | CYJ2.5-1-3HB, CYJ3-1.2-7HB | Beam: Q235B carbon steel; Crankshaft: 40Cr alloy steel; Crosshead: 45# carbon steel; Guide rail: HT200 gray cast iron | 1. Crosshead and guide rail wear caused by poor lubrication and dust intrusion; 2. Wire rope wear and breakage caused by misalignment of the polished rod eye | 1. Regularly add lubricating oil to the guide rail (every 10 days), and install a dust cover at the crosshead position; 2. Check the alignment of the polished rod eye every 3 days, and adjust the position in time if deviation is found (allowable deviation ≤ 2mm) | |
Conventional Beam Pumping Unit | CYJ5-1.8-13HB, CYJ5-2.1-13HB, CYJ5-2.5-18HB | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Gear: 20CrMnTi alloy steel (carburized and quenched); Sealing ring: nitrile rubber | 1. Gearbox oil leakage caused by sealing ring aging and wear; 2. Beam fatigue crack caused by long-term overload operation (exceeding 110% of rated load) | 1. Replace the gearbox sealing ring every 12 months, and check the oil level regularly to avoid excessive oil injection; 2. Monitor the load in real time with a load sensor, and stop operation immediately if overload occurs, adjust the pumping parameters | |
Conventional Beam Pumping Unit | CYJ6-2.5-26HF, CYJ6-2.5-26HB | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Base: Q355B carbon steel; Counterweight: cast iron | 1. Base weld cracking caused by uneven foundation and vibration; 2. Crankshaft bearing damage caused by alternating load and high temperature | 1. Check the foundation levelness every 3 months, and adjust by adding shims if uneven; 2. Monitor the bearing temperature in real time (allowable temperature ≤ 75℃), and replace the bearing if the temperature exceeds the limit | |
Conventional Beam Pumping Unit | CYJ8-3-37HB, CYJ10-3-37HB, CYJ10-3-53HB | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Gearbox: HT250 gray cast iron; Connecting rod: 42CrMo alloy steel | 1. Connecting rod bushing wear caused by insufficient lubrication and alternating load; 2. Gearbox gear tooth breakage caused by sudden load impact (e.g., sand plugging in the oil well) | 1. Inject lubricating grease into the connecting rod bushing every 20 days, and check the bushing wear regularly; 2. Install a load shock absorber at the polished rod, and clean the well in time if sand plugging is found |
2. Energy-Saving Beam Pumping Units
This series of pumping units is equipped with optimized counterweight structures and energy-saving transmission systems, featuring low energy consumption and high efficiency. They solve pain points of high energy consumption and low oil extraction efficiency of conventional pumping units in low-yield oil reservoirs. Suitable for low-permeability, low-yield oil reservoirs and old oilfields with high energy-saving requirements.
No. | Product Name | Model | Material | Main Wear Causes | Damage Prevention Precautions |
Energy-Saving Beam Pumping Unit | CYJY4-1.8-13HB, CYJY6-2.5-18HB, CYJY6-2.5-26HB | Beam: Q355B alloy steel; Energy-saving gearbox: HT250 gray cast iron; Variable counterweight: cast iron + concrete; Crosshead: 45# carbon steel (surface quenching) | 1. Variable counterweight adjustment mechanism jamming caused by dust and sand intrusion; 2. Gearbox energy-saving component wear caused by improper lubricating oil selection | 1. Clean the counterweight adjustment mechanism every 10 days, and apply lubricating grease to the lead screw; 2. Use special energy-saving gear oil (meets GB 30532-2014 standard) for the gearbox, and replace it every 1800 operating hours | |
Energy-Saving Beam Pumping Unit | CYJY8-3-37HB, CYJY10-3-53HB, CYJY12-4.2-73HB | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Frequency conversion control cabinet: 304 stainless steel; Gear: 20CrMnTi alloy steel | 1. Frequency conversion control cabinet internal component damage caused by voltage fluctuation and dust intrusion; 2. Beam hinge pin wear caused by alternating load and insufficient lubrication | 1. Install a voltage stabilizer and surge protector at the power input end of the control cabinet, and clean the internal dust every 3 months; 2. Inject lithium-based grease into the hinge pin every 15 days, and check the wear amount regularly | |
Energy-Saving Beam Pumping Unit | CYJY14-5.4-73HB, CYJY14-5.5-89HB, CYJY14-5.5-89HF | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel; Gearbox: HT250 gray cast iron; Sealing ring: fluororubber | 1. Gearbox oil leakage caused by high temperature and sealing ring aging; 2. Crankshaft fatigue damage caused by long-term continuous operation without shutdown | 1. Install a cooling fan for the gearbox to control the operating temperature ≤ 70℃, and replace the sealing ring every 10 months; 2. Arrange regular shutdown maintenance every 24 hours of continuous operation, check the crankshaft for abnormal noise | |
Energy-Saving Beam Pumping Unit | YCYJ10-3-37HB, YCYJ10-3-53HB, YCYJ12-5-48HB | Beam: Q355B alloy steel; Energy-saving motor: 304 stainless steel shell; Counterweight: cast iron; Base: Q355B carbon steel | 1. Energy-saving motor insulation layer damage caused by moisture and corrosion; 2. Base corrosion caused by rainwater and oilfield sewage erosion | 1. Install a moisture-proof cover for the motor, and check the insulation resistance regularly (allowable resistance ≥ 2MΩ); 2. Paint the base with anti-corrosion and anti-rust paint every 6 months, and do a good job in the drainage of the installation site |
3. Special Working Condition Pumping Units
This category of pumping units is specially designed for complex working conditions such as high sand content, high viscosity, and offshore oilfields, featuring strong corrosion resistance and wear resistance. They solve pain points of easy damage and short service life of conventional pumping units in harsh working conditions. Suitable for high-viscosity oil reservoirs, sand-producing oil wells, and offshore oilfields.
No. | Product Name | Model | Material | Main Wear Causes | Damage Prevention Precautions |
Special Working Condition Pumping Unit | CYJP10-3-53HF, CYJX10-6-53HF, CYJY10-6-53HF | Beam: Q355B alloy steel (anti-corrosion coating); Crankshaft: 42CrMo alloy steel (nitriding treatment); Gearbox: HT250 gray cast iron (anti-corrosion painting); Sealing ring: perfluoroelastomer | 1. Gear and crankshaft wear caused by sand particles entering the gearbox; 2. Sealing ring damage caused by high-temperature and high-corrosion oilfield sewage | 1. Install a high-precision oil filter at the gearbox oil inlet, and replace the filter element every 500 operating hours; 2. Use perfluoroelastomer sealing rings with strong corrosion resistance, and check the sealing performance every 7 days | |
Special Working Condition Pumping Unit | CYJQ14-5-73HY, CYJQ14-5.4-89HB | Beam: 304 stainless steel; Crankshaft: 42CrMo alloy steel; Gearbox: HT250 gray cast iron (stainless steel lining); Counterweight: stainless steel | 1. Beam and counterweight corrosion caused by offshore salt spray environment; 2. Gearbox internal corrosion caused by seawater intrusion | 1. Spray anti-salt spray coating on the surface of beam and counterweight every 3 months; 2. Strengthen the sealing of the gearbox, install a desiccant inside, and check the oil quality regularly to avoid seawater mixing | |
Special Working Condition Pumping Unit | CYJS10-5-37HB, CYJS10-5-48HB, CYJS12-5-48HB | Beam: Q355B alloy steel; Crankshaft: 42CrMo alloy steel (wear-resistant coating); Crosshead: 45# carbon steel (carburized treatment); Guide rail: HT200 gray cast iron (wear-resistant lining) | 1. Crosshead and guide rail severe wear caused by high sand content in the oil well; 2. Crankshaft bearing damage caused by vibration and impact | 1. Install a sand control device at the wellhead to reduce sand content in the oil; 2. Use wear-resistant bearings for the crankshaft, and check the bearing wear and temperature regularly | |
Special Working Condition Pumping Unit | SCYJ10-3-37HB, SCYJ10-3-48HB | Beam: Q355B alloy steel; Gearbox: HT250 gray cast iron; Base: Q355B carbon steel (stainless steel cladding); Connecting rod: 42CrMo alloy steel | 1. Base corrosion caused by high-acidity oilfield environment; 2. Connecting rod fatigue crack caused by high-viscosity oil pumping resistance | 1. Use stainless steel cladding on the base surface to enhance corrosion resistance, and check the cladding layer for damage regularly; 2. Monitor the pumping resistance in real time, and heat the wellbore if the resistance is too high to reduce oil viscosity |
Field Fault Maintenance Case
Case 1: CYJY10-3-53HB Energy-Saving Pumping Unit Gearbox Damage Caused by Improper Lubrication - In a low-yield oilfield, the CYJY10-3-53HB energy-saving pumping unit had abnormal noise in the gearbox during operation, and the oil temperature rose rapidly, leading to forced shutdown. Inspection found that the gear teeth in the gearbox were severely worn and pitted, and the lubricating oil was black and turbid. Root cause: The on-site maintenance personnel used conventional gear oil instead of the required special energy-saving gear oil, and the oil replacement cycle exceeded the specified time, resulting in poor lubrication and severe gear wear. Solution: Disassembled the gearbox, replaced the worn gears and bearings, added special energy-saving gear oil that meets GB 30532-2014 standard, and formulated a strict oil replacement plan (replaced every 1800 operating hours). After maintenance, the gearbox operated normally, and the energy-saving effect reached the design standard.
Case 2: CYJQ14-5-73HY Offshore Pumping Unit Corrosion Failure - In an offshore oilfield, the CYJQ14-5-73HY pumping unit's beam and counterweight showed severe corrosion after 6 months of operation, and the base welds had signs of cracking. Root cause: The offshore salt spray environment was highly corrosive, and the anti-corrosion coating on the equipment surface was damaged due to long-term wind and wave impact, failing to play a protective role. Solution: Removed the corroded parts, derusted and repaired the base welds, sprayed high-performance anti-salt spray coating on the beam and counterweight (thickness ≥ 150μm), and installed protective covers to reduce wind and wave impact. Established a monthly anti-corrosion inspection system. After improvement, the equipment operated stably for 12 months without new corrosion phenomena.
Procurement Guide & Call to Action
All pumping unit models listed in this document fully comply with GB/T 29022-2012 and SY/T 5044-2016 standards, with reliable quality and authoritative certification. When purchasing, please confirm the oilfield working conditions (conventional/low-yield/high-sand content/offshore), rated load, stroke length, and energy-saving requirements, and select the corresponding model (CYJ conventional type, CYJY energy-saving type, CYJP/CYJQ special working condition type). Our professional technical team provides one-on-one technical consultation services, covering product selection, on-site installation and commissioning, fault diagnosis, and maintenance training. For detailed product parameters, material performance reports, certification documents, and procurement quotes, please contact us at your convenience. We are committed to providing you with high-quality, suitable pumping unit products and professional after-sales support to ensure efficient and safe oilfield exploitation operations.
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