Product Introduction
This series covers all essential replacement parts for the LSNOI 3NB-1600 mud pump power end assembly, including integrated frame assemblies, crank shaft and drive shaft assemblies, forced and spray lubrication system modules, oil boxes, crosshead guides, sealing assemblies, high-strength bolts, nuts, washers, locking wires, oil seals, gaskets of various specifications, intermediate rods, water retainers and spray pump system parts. Each part is made of oilfield-grade wear-resistant, vibration-resistant and corrosion-resistant materials, processed by precision CNC machining, achieving 100% direct interchangeability with original power end components, requiring no on-site modification, grinding or secondary processing, suitable for daily inspection, routine maintenance, seasonal preventive replacement and full power end overhaul.
Core Function Specifications
Every component in this power end parts lineup is engineered to withstand harsh heavy-duty drilling conditions, with verified authoritative performance indicators:
- High-Strength Load Bearing: The reinforced frame assembly stably bears 1600HP rated power load, with no deformation or cracking under continuous heavy-load operation.
- Efficient Lubrication Control: Dual lubrication systems (forced & spray) achieve full coverage lubrication of all moving parts, maintaining stable oil pressure at 0.25-0.45MPa.
- Reliable Sealing Performance: Custom oil seals and multi-specification gaskets realize zero leakage of lubricating oil, adapting to long-term vibration and temperature fluctuations.
- Stable Power Transmission: Matched drive and crank shaft assemblies ensure smooth torque transmission, with no power loss or abnormal noise during operation.
- Anti-Loosening Fastening: High-strength bolts, locking wires and spring washers form a dual anti-loosening structure, preventing fastener loosening under strong mechanical vibration.
Structural Characteristics
These power end assembly parts feature optimized structures suitable for oilfield field maintenance and long-term durable operation:
- Integral Reinforced Frame: Integrated casting frame with high rigidity and stability, reducing vibration amplitude and ensuring stable operation of internal components.
- Modular Lubrication System: Independent forced lubrication and spray pump modules facilitate quick disassembly, cleaning and replacement, simplifying maintenance operations.
- Split Crosshead Guide Design: Upper and lower split guides enable precise positioning of moving parts, reducing wear and facilitating later wear adjustment.
- Multi-Stage Sealing Structure: Combined oil seal and ring sealing system effectively blocks lubricating oil leakage and external mud and dust intrusion.
- Standardized Fastener Configuration: Unified thread specifications and positioning structures ensure easy installation, high compatibility and convenient spare parts preparation.
Maintenance and Upkeep Suggestions
To ensure stable operation of the power end assembly and prolong service life, follow these field-proven maintenance protocols:
- Daily Inspection: Monitor lubricating oil level via dipstick, check for oil leakage at seals and joints, observe abnormal vibration and noise, and record bearing operating temperature (normal ≤75℃).
- Weekly Maintenance: Retighten all high-strength fasteners to standard torque, check locking wire integrity, clean lubrication system filters, and inspect gasket aging.
- Monthly Inspection: Check crosshead guide wear degree, measure lubricating oil quality, inspect oil seal sealing performance, and adjust component clearance.
- Regular Overhaul: Replace vulnerable seals, gaskets and oil seals every 8 months, inspect frame stress concentration areas annually, and replace severely worn guide parts.
- Storage Requirements: Store sealing parts in a cool, dark and dry environment, apply anti-rust oil on metal components, and avoid collision damage to precision mating surfaces.
We supply the following spare parts:
| 107.11.01.00 Power End Assembly | ||
| Item No. | Part No. | Description |
| 101 | 107.11.600.00-1 | Frame assemble |
| 102 | JB1000-77 | Plug M60x2 |
| 103 | D3-4-67 | Rubber washer 62×75 5 4 |
| 104 | 107.11.40.00 | Forced lubrication system |
| 105 | 107.11.95.00 | Dipstick oil lever |
| 106 | D3-4-67 | Rubber washer 22×32 5 3 |
| 107 | 107.11.93.00-1 | Cover |
| 108 | GB6170-86 | Nut M16 |
| 109 | 107.11.90.27 | Plate |
| 110 | 107.11.90.29 | Pipe Φ 25×2.5 L=30 |
| 111 | 107.11.99.00 | T Bolt M16 |
| 112 | 107.11.10.00 | Drive shaft assembly |
| 113 | 107.11.20.00 | Crank shaft assembly |
| 114 | 107.11.91.00-1 | Frame |
| 115 | 107.11.30.00 | Spray lubrication system |
| 116 | 107.11.90.23 | Gasket δ 0.2 50×400 |
| 117 | 107.11.90.24 | Gasket δ 0.1 50×400 |
| 118 | 107.11.90.25 | Gasket δ 0.05 50×400 |
| 119 | 107.11.90.32 | Gasket δ 8 |
| 120 | 107.04.90.07 | Gasket δ 6 |
| 121 | 107.04.90.08 | Oil tubing Φ20×1 |
| 122 | GB5783-86 | Bolt M12x25 |
| 123 | GB93-87 | Washer 12 |
| 124 | 107.11.60.00 | Oil box |
| 125 | GB5783-86 | Bolt M20x55 |
| 126 | GB93-87 | Washer 20 |
| 127 | 107.11.96.01 | Gasket δ 5 |
| 128 | GB93-87 | Washer 20 |
| 129 | GB5783-86 | Bolt M16x30 |
| 130 | GB93-87 | Washer 16 |
| 131 | 107.11.93.02 | Gasket δ 5 |
| 132 | 107.11.96.03 | Packing box |
| 133 | 107.11.01.02 | Intermediate rod |
| 134 | 107.11.70.00 | Water retainer |
| 135 | 107.11.90.00 | Frame assembly |
| 136 | 107.11.101.00 | Spray pump system |
| 137 | 107.11.90.03 | Crosshead guide lower |
| 138 | 107.11.90.04-1 | Bolt |
| 139 | GB97.1-85 | Washer 24 |
| 140 | Wire Φ 3 L=5400 | |
| 141 | 107.11.90.26 | Gasket Φ 40xΦ26 |
| 142 | 107.11.01.01 | Bolt M30 |
| 143 | Wire Φ3 L=2400 | |
| 144 | GB5782-86 | Bolt M24x90 |
| 145 | GB6170-86 | Nut M24 |
| 146 | GB93-87 | Spring washer 24 |
| 147 | 107.11.96.06 | Plate |
| 148 | GB119-86 | Pin A10 x 50 |
| 149 | 107.11.97.00 | Single lip oil seal |
| 150 | 107.11.96.04 | Ring |
| 151 | 107.11.96.05 | Ring |
| 152 | 107.11.96.07 | Plate |
| 153 | GB5783-86 | Bolt M10x25 |
| 154 | GB93-87 | Washer 10 |
| 155 | 107.11.90.05 | Crosshead guide uppe |
On-site Fault Repair Cases
Case 1: Lubricating Oil Leakage Caused by Oil Seal Failure
A large amount of lubricating oil leakage occurred at the power end frame of a 3NB-1600 mud pump, leading to insufficient oil level and lubrication risks. The single lip oil seal was aged and damaged, losing sealing effect. Maintenance staff replaced the damaged oil seal, installed matching gaskets, retightened the fastening bolts, and completely eliminated the leakage.
Case 2: Abnormal Operation Due to Crosshead Guide Wear
The mud pump power end generated obvious abnormal noise and vibration during operation, affecting normal drilling progress. The upper and lower crosshead guides were severely worn, leading to excessive motion clearance. Technicians replaced the worn guide parts, readjusted the assembly clearance, and restored stable operation of the power end.
Case 3: Insufficient Lubrication Triggered by Lubrication System Blockage
The power end lubrication pressure was unstable, and internal components had poor lubrication. The spray lubrication system pipeline and oil passage were blocked by impurities, resulting in unsmooth oil circulation. Workers cleaned the lubrication pipeline, replaced damaged oil tubing, and debugged the lubrication system to restore normal lubrication.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with LSNOI 3NB-1600 mud pump power end assembly? | Yes, all parts in this list are specially designed for the LSNOI Lanzhou LS 3NB-1600 mud pump power end assembly (107.11.01.00), fully matching OEM dimensions, material standards and installation requirements with 100% direct interchangeability. |
| What is the normal lubricating oil pressure range of the power end? | The normal stable lubricating oil pressure of the 3NB-1600 mud pump power end is 0.25-0.45MPa; abnormal pressure indicates blockage, leakage or component damage. |
| How often should the power end lubricating oil be replaced? | Under conventional operating conditions, replace the lubricating oil every 1500 working hours; shorten the replacement cycle to 1000 working hours in heavy-load and harsh environmental conditions. |
Procurement Guidance
This LSNOI 3NB-1600 mud pump power end assembly parts list is a professional and reliable reference for oilfield equipment maintenance and spare parts procurement teams, providing clear, accurate part selection and procurement standards for daily maintenance, seasonal replacement and full power end overhaul. All supplied parts undergo strict dimensional verification, load performance testing and wear resistance testing, fully complying with API 7K industry standards and original equipment quality requirements, with ultra-high stability, vibration resistance and durability.
