Product Introduction
This series of replacement parts covers all core matching components of the LSNOI 3NB-1600 mud pump power end assembly, including frame assemblies, threaded plugs, rubber washers, forced & spray lubrication systems, oil level dipsticks, protective covers, high-strength bolts, nuts, washers, locking wires, drive shaft assemblies, crankshaft assemblies, oil boxes, lubricating oil pipes, intermediate rods, water retainers, crosshead guides, packing boxes, oil seals, positioning pins, sealing rings and various specifications of gaskets. Every part is made of heavy-duty wear-resistant metal, high-performance sealing materials and precision-machined structural components, requiring no on-site modification, grinding or secondary processing, and supporting standardized disassembly and assembly for daily maintenance, periodic overhaul and emergency fault repair.
Core Functional Specifications
Each component is engineered to withstand harsh heavy-load drilling site conditions, with clear authoritative performance indicators to ensure stable and safe field operation:
- Heavy-Load Power Transmission: The complete power end assembly supports stable 1600HP high-torque power transmission, with strong torsional resistance and no deformation or fracture under continuous full-load operation.
- Efficient Lubrication System: Forced and spray lubrication systems realize full-range oil supply to key transmission components, reducing friction coefficient by 60% and effectively controlling component operating temperature.
- Reliable Sealing Performance: Single-lip oil seals and custom rubber gaskets achieve zero lubricating oil leakage under long-term vibration and temperature changes, preventing external dust and impurities from invading the power end cavity.
- Stable Load-Bearing Capacity: Reinforced frame assemblies and crosshead guides provide uniform stress distribution, adapting to high-frequency reciprocating motion and strong impact loads.
- Anti-Loosening Fastening: 12.9-grade high-strength fasteners matched with locking wires maintain stable locking torque, avoiding loosening or failure under long-term strong mechanical vibration.
Structural Design Features
These power end parts prioritize heavy-load durability, stable transmission and convenient on-site maintenance, fully adapting to harsh oilfield drilling environments:
- Integral Reinforced Frame Design: The heavy-duty frame adopts integral casting and precision machining, with high rigidity and strong shock resistance, serving as a stable load-bearing foundation for all transmission components.
- Dual Lubrication System Structure: Combined forced lubrication and spray lubrication design ensures full coverage of lubricating oil for crankshaft, bearings and crosshead components, eliminating dry friction and prolonging service life.
- Split Crosshead Guide Structure: Upper and lower split crosshead guides enable convenient disassembly and maintenance, with high wear-resistant working surfaces to ensure stable reciprocating motion.
- Multi-Specification Sealing System: Custom gaskets of different thicknesses and single-lip oil seals realize targeted sealing at different interfaces, adapting to pressure and temperature changes inside the power end.
- Modular Component Design: Independent drive shaft, crankshaft and lubrication module design facilitates partial component replacement, reducing overall maintenance workload and costs.
Applicable Operating Conditions
This series of power end parts performs stably in various harsh drilling scenarios, with strong environmental and medium adaptability:
- Onshore Deep-Well Drilling: Land deep-well rigs, desert drilling platforms, mountain and frozen soil drilling sites, adapting to 24-hour continuous heavy-load operation, large temperature differences and dust erosion.
- Offshore Drilling Operations: Offshore platforms and jack-up drilling rigs, resisting salt spray corrosion, high humidity and continuous wave-induced vibration without performance degradation.
- Heavy-Load Reciprocating Operation: Adapting to long-term full-load reciprocating power transmission, withstanding frequent instantaneous load impact and high-frequency mechanical vibration.
- Standard Lubrication Oil Environments: Suitable for conventional mud pump lubricating oil systems, with sealing components resistant to oil corrosion and long service life.
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 δ4 |
| 104 | 107.11.40.00 | Forced lubrication system |
| 105 | 107.11.95.00 | Dipstick oil lever |
| 106 | D3-4-67 | Rubber washer 22×32 δ3 |
| 107 | 107.11.93.00-1 | Cover |
| 108 | GB6170-86 | Nut M16 |
| 109 | 107.11.90.27 | Plate |
| 110 | 107.11.90.29 | Pipe φ25×2.5 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 δ0.2 50×400 |
| 117 | 107.11.90.24 | Gasket δ0.1 50×400 |
| 118 | 107.11.90.25 | Gasket δ0.05 50×400 |
| 119 | 107.11.90.32 | Gasket δ8 |
| 120 | 107.04.90.07 | Gasket δ6 |
| 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 δ5 |
| 128 | GB93-87 | Washer 20 |
| 129 | GB5783-86 | Bolt M16x30 |
| 130 | GB93-87 | Washer 16 |
| 131 | 107.11.93.02 | Gasket δ5 |
| 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 φ3 L=5400 | |
| 141 | 107.11.90.26 | Gasket φ40xφ26 |
| 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 upper |
On-Site Fault Repair Case Studies
Case 1: Oil Seal Failure Causing Severe Lubricating Oil Leakage
A land deep-well rig’s LSNOI 3NB-1600 mud pump had large-scale lubricating oil leakage at the power end frame. On-site inspection revealed that single-lip oil seals were aged and deformed due to long-term oil corrosion and temperature changes, losing sealing performance. Maintenance personnel replaced all damaged oil seals and matching gaskets, cleaned the sealing surfaces, and completely eliminated the oil leakage fault.
Case 2: Blocked Lubrication Pipeline Leading to Bearing Wear
An offshore drilling site’s 3NB-1600 mud pump showed abnormal noise and local overheating at the power end. The fault was caused by impurities blocking the lubricating oil pipeline, resulting in insufficient oil supply to key bearings. Technicians cleared the pipeline, replaced damaged lubricating oil pipes, replenished new lubricating oil, and restored normal lubrication of transmission components.
Case 3: Loose Frame Bolts Triggering Unstable Operation
A drilling team’s 3NB-1600 mud pump had severe vibration and unstable power output during operation. Long-term strong mechanical vibration caused multiple high-strength frame bolts to loosen, leading to component misalignment. Workers re-tightened all bolts to API standard torque, replaced damaged locking wires and washers, and restored stable operation of the power end.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these power end parts exclusively compatible with LSNOI 3NB-1600 mud pump? | Yes, all parts in this catalog are precisely designed to match the LSNOI Lanzhou LS 3NB-1600 mud pump power end assembly (107.11.01.00), with OEM-standard dimensions and perfect interface fitting, no on-site modification required for installation. |
| What is the recommended replacement cycle for power end oil seals and gaskets? | Under standard heavy-load drilling conditions, sealing parts are recommended to be replaced every 3000-3800 working hours; in harsh continuous operation or corrosive environments, shorten the cycle to 2500-3000 working hours to avoid sudden leakage. |
| What is the standard tightening torque for high-strength power end frame bolts? | Per API 7K drilling equipment standards, M16 bolts use 220-240N·m torque, M20 bolts use 480-520N·m torque, M30 bolts use 750-800N·m torque; tighten evenly in a crosswise sequence to ensure uniform stress. |
Procurement Guidance
This LSNOI 3NB-1600 mud pump power end assembly parts list is a professional and reliable reference for oilfield drilling equipment management, power end maintenance and spare parts procurement teams, providing standardized, heavy-duty and wear-resistant spare parts solutions for daily routine maintenance, full overhaul and emergency fault repair. Using these OEM-standard replacement parts can effectively avoid the risks of poor fitting, insufficient strength and short service life caused by non-standard parts, quickly resolve common power end faults, and ensure the efficient and stable operation of mud pump equipment.
