Product Introduction
This comprehensive series covers all core replacement parts for the LS-NOV 3NB-1300C mud pump power end assembly, including integrated frame assemblies, drive shaft and crankshaft assemblies, forced and spray lubrication systems, crosshead upper and lower guides, oil boxes, packing boxes, single-lip oil seals, high-strength bolts, nuts, washers, locking wires, precision gaskets of various thicknesses, oil tubing, dipsticks, intermediate rods, water retainers and full sets of positioning pins. Each part is crafted from oilfield-grade wear-resistant, fatigue-resistant and corrosion-resistant materials, processed by precision machining and pressure testing, achieving 100% direct interchangeability with original power end components, requiring no on-site modification or secondary processing, suitable for daily inspection, routine maintenance, preventive replacement and full power end overhaul.
Structural Characteristics
These power end assembly parts feature optimized structures suitable for oilfield field maintenance and long-term durable operation:
- Integral High-Strength Frame: Integrated cast frame with uniform stress distribution, high rigidity and shock resistance, avoiding deformation under heavy load.
- Modular Lubrication System: Independent lubrication modules facilitate quick disassembly, cleaning and maintenance, simplifying daily upkeep.
- Split Guide Rail Design: Separated upper and lower crosshead guides enable targeted replacement, reducing maintenance costs and downtime.
- Multi-Grade Gasket Adjustment: Various thickness precision gaskets allow micro-clearance adjustment, optimizing component fit and operation.
- Standardized Fastening System: Unified national standard fasteners with strong compatibility, making spare parts stocking and replacement more efficient.
Applicable Working Conditions
All power end assembly parts adapt to various harsh oilfield drilling scenarios matching the LS-NOV 3NB-1300C mud pump:
- Heavy-Load Continuous Drilling: 24-hour uninterrupted onshore conventional drilling, deep well drilling and workover operations.
- High-Torque Drive Environment: Resists continuous heavy torque, cyclic impact and high-frequency mechanical vibration.
- Harsh Outdoor Environments: Desert, mountain, cold and high-temperature drilling platforms, adapting to ambient temperatures ranging from -40℃ to 75℃.
- Mud-Contaminated Site Conditions: Sealed structural design prevents mud and dust intrusion, protecting internal drive components.
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: Check lubricating oil level via dipstick, inspect all sealing joints for oil leakage, monitor abnormal vibration and noise.
- Weekly Maintenance: Retighten all high-strength fasteners to standard torque, check locking wire integrity, clean oil tubing blockages.
- Monthly Inspection: Inspect crosshead guide wear, check oil seal aging, clean lubrication system filters and oil boxes.
- Regular Overhaul: Replace all oil seals, gaskets and worn tubing every 6 months, inspect frame stress points annually, replace fatigued fasteners.
- Storage Requirements: Store rubber seals and gaskets in a cool, dry and dark environment; apply anti-rust oil on metal components to prevent corrosion.
We supply the following spare parts:
| 107.12.01.00 Power End Assembly | ||
| Item No. | Part No. | Description |
| 101 | 107.12.600.00-1 | Frame assemble |
| 102 | JB1000-77 | Plug M60x2 |
| 103 | D3-4-67 | Rubber washer 62×75 δ4 |
| 104 | Forced lubrication system | |
| 105 | 107.12.95.00 | Dipstick oil lever |
| 106 | D3-4-67 | Rubber washer 22×32 δ3 |
| 107 | 107.12.93.00-1 | Cover |
| 108 | GB6170-86 | Nut M16 |
| 109 | 107.11.90.27 | Plate |
| 110 | 107.12.90.29 | Pipe φ25×2.5 L=30 |
| 111 | 107.11.99.00 | T Bolt M16 |
| 112 | 107.12.10.00 | Drive shaft assembly |
| 113 | 107.12.20.00 | Crank shaft assembly |
| 114 | 107.11.91.00-3 | Frame |
| 115 | 107.12.30.00 | Spray lubrication system |
| 116 | 107.12.90.23 | Gasket δ0.2 50×400 |
| 117 | 107.12.90.24 | Gasket δ0.1 50×400 |
| 118 | 107.12.90.25 | Gasket δ0.05 50×400 |
| 119 | 107.04.90.06 | Gasket δ3 |
| 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 | 107.12.93.02 | Gasket δ5 |
| 132 | 107.12.96.03 | 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 | 107.12.96.06 | 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 Cases
Case 1: Lubricating Oil Leakage Caused by Oil Seal Failure
Large-scale lubricating oil leakage occurred at the power end frame joint, leading to insufficient oil level and accelerated component wear. The single-lip oil seal was aged, hardened and lost sealing performance. Maintenance staff replaced the matched oil seal, installed new sealing gaskets, retightened fastening bolts, and completely eliminated the leakage fault.
Case 2: Abnormal Vibration Due to Crosshead Guide Wear
The power end produced severe abnormal vibration and unstable reciprocating motion, with obvious radial runout. The upper and lower crosshead guides were severely worn due to long-term friction, resulting in excessive motion clearance. Workers replaced the worn guide components, adjusted gasket thickness to calibrate clearance, and restored stable operation.
Case 3: Insufficient Lubrication Caused by Oil Tubing Blockage
Internal drive components showed poor lubrication and local overheating, with reduced lubrication system pressure. The oil tubing was blocked by accumulated sludge and metal impurities. Technicians cleaned the entire lubrication pipeline, replaced blocked tubing, and resumed normal lubricating oil circulation.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with LS-NOV 3NB-1300C mud pump power end assembly? | Yes, all parts in this list are custom-designed for the LS-NOV 3NB-1300C mud pump power end assembly (107.12.01.00), fully matching OEM dimensions, material standards and installation requirements with 100% direct interchangeability. |
| What is the normal working pressure range of the power end lubrication system? | The standard stable working pressure of the forced and spray lubrication system is 0.2-0.4MPa; abnormal pressure indicates blockage, leakage or system failure. |
| How often should the power end sealing gaskets be replaced? | Replace all sealing gaskets every 6 months under conventional operation; shorten the replacement cycle to 3 months in heavy-load, high-vibration working conditions. |
Procurement Guidance
This LS-NOV 3NB-1300C 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, routine replacement and full power end overhaul. All supplied parts undergo strict dimensional verification, load-bearing testing and wear resistance testing, fully complying with API 7K industry standards and original equipment quality requirements, with ultra-high durability, stability and sealing performance.
