Product Introduction
This series of liner spray pump replacement parts covers all core components suitable for Lanzhou LS 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pumps, including frame assemblies, drive shaft assemblies, crankshaft assemblies, oil boxes, various sealing gaskets, rubber washers, connecting bolts, washers, nuts, oil pipelines, covers, dipstick oil level gauges and dedicated pipeline fittings. All parts are precision machined to match original pump dimensions, requiring no on-site modification or secondary processing; universal design across the four pump models streamlines inventory management and reduces procurement complexity.
Core Functional Specifications
Every component is engineered to support consistent, reliable operation of the mud pump liner spray system under harsh drilling conditions, with clear, field-proven performance metrics:
- Cooling & Lubrication Efficiency: The fully assembled spray pump delivers a steady fluid flow rate of 15-25L/min, keeping cylinder liner operating temperature within a safe range of 60-85℃, reducing friction wear by over 60%.
- Sealing Performance: Custom rubber washers and multi-specification gaskets feature oil-resistant, wear-resistant nitrile rubber material, achieving zero fluid leakage under long-term continuous operation, with a service life of up to 2800 working hours.
- Power Transmission Stability: Drive shaft and crankshaft assemblies feature high-precision machining, with radial runout controlled within 0.02mm, ensuring stable power transmission and smooth spray pump operation even under high pump vibration.
- Fluid Delivery Stability: Standard-caliber oil pipelines with smooth inner walls prevent fluid blockages, maintaining consistent pressure and flow to the cylinder liner assembly at all times.
Structural Design Features
These liner spray pump parts prioritize field durability, ease of maintenance and anti-vibration performance, fully adapted to the harsh conditions of drilling sites:
- Reinforced Frame Structure: Integrated rigid frame design with reinforced mounting points, effectively absorbing vibration from the main mud pump, preventing component loosening and ensuring stable spray pump positioning.
- Combined Sealing System: Layered gasket and rubber washer sealing design, with precise fitting sizes, simple replacement steps, and superior leakage prevention compared to standard single-seal designs.
- Quick-Disassembly Pipeline Layout: Standardized connecting pipes and fittings enable quick disassembly and assembly, simplifying blockage cleaning and part replacement, reducing on-site maintenance downtime.
- Anti-Vibration Fastening Design: High-strength bolts paired with lock washers provide reliable anti-loosening performance, maintaining torque retention even under continuous, high-frequency mud pump vibration.
- Visual Monitoring Design: Equipped with a dedicated dipstick oil level gauge for real-time fluid level monitoring, making daily routine checks quick and intuitive for field crews.
Maintenance & Service Recommendations
To maximize the service life of the liner spray pump and avoid sudden failures, follow these API-standardized, field-proven maintenance protocols:
- Daily Inspection: Check the oil level via the dipstick oil level gauge and top up cooling fluid as needed; inspect sealing points for fluid leaks, and confirm smooth spray output to the cylinder liner.
- Weekly Maintenance: Tighten all connecting bolts to rated torque; clean oil pipeline inlets to remove impurities and prevent blockages; wipe down the oil box and frame to remove mud buildup.
- Monthly Maintenance: Inspect rubber washers and gaskets for wear, hardening or cracking; replace damaged seals promptly; check drive shaft rotation for abnormal noise or jamming.
- Quarterly Maintenance: Flush the oil box and internal pipelines to remove accumulated sludge; inspect the drive shaft and crankshaft assemblies for wear; adjust fastener torque to prevent loosening.
- Storage Guidelines: Store spare parts in a dry, ventilated, dust-free environment; keep rubber sealing parts away from direct sunlight and high temperatures to prevent premature aging.
- We supply the following spare parts:
| NAME | PART NO | |||
| NAME | 3NB500C | 3NB1000C | 3NB1300C | 3NB1600 |
| Slush pump | 107.15.00 | 107.14.00 | 107.12.00 | 107.11.00 |
| Description | 107.15.01.00 | 107.14.01.00 | 107.12.01.00 | 107.11.01.00 |
| Frane/Assembly | 107.15.600.00 | 107.14.600.00-1 | 107.12.600.00-1 | 107.11.600.00-1 |
| Plug | JB1000-77（M60×2） | JB1000-77（M60×2） | JB1000-77（M60×2） | JB1000-77（M60×2） |
| Rubber washer | D3-4-67(62×75 δ4） | D3-4-67(62×75 δ4） | D3-4-67(62×75 δ4） | D3-4-67(62×75 δ4） |
| Forced lubrcation system | 107.11.40.00 | |||
| Dipstick oil lever | 107.15.95.00 | 107.14.95.00 | 107.12.95.00 | 107.11.95.00 |
| Rubber washer | D3-4-67(22×32 δ3） | D3-4-67(22×32 δ3） | D3-4-67(22×32 δ3） | D3-4-67(22×32 δ3） |
| Cover | 107.15.93.00 | 107.14.93.00 | 107.12.93.00-1 | 107.11.93.00-1 |
| Nut | GB6170-86(M16) | GB6170-86(M16) | GB6170-86(M16) | GB6170-86(M16) |
| Plate | 107.11.90.27 | 107.14.90.14 | 107.11.90.27 | 107.11.90.27 |
| Pipe | 107.15.90.13（φ25×2.5 L=30） | 107.14.90.15（φ25×2.5 L=30） | 107.12.90.11（φ25×2.5 L=30） | 107.11.90.29（φ25×2.5 L=30） |
| Bolt | 107.11.99.00(M16) | 107.11.99.00(M16) | 107.11.99.00(M16) | 107.11.99.00(M16) |
| Drive shaft assy | 107.15.10.00 | 107.14.10.00 | 107.12.10.00 | 107.11.10.00 |
| Crank shaft assy | 107.15.20.00 | 107.14.20.00 | 107.12.20.00 | 107.11.20.00 |
| Frame | 107.15.91.00-1 | 107.14.91.00 | 107.11.91.00-3 | 107.11.91.00-1 |
| Spary lubrcation system | 107.15.30.00 | 107.14.30.00 | 107.12.30.00 | 107.11.30.00 |
| Gasket | 107.15.90.03（δ0.2 40×320 ） | 107.14.90.03（δ0.2 50×345 ） | 107.12.90.08（δ0.2 50×400 ） | 107.11.90.23（δ0.2 50×400 ） |
| Gasket | 107.15.90.02（δ0.1 40×320 ） | 107.14.90.02（δ0.1 50×345 ） | 107.12.90.09（δ0.1 50×400 ） | 107.11.90.24（δ0.1 50×400 ） |
| Gasket | 107.15.90.01（δ0.05 40×320 ） | 107.14.90.01（δ0.05 50×345 ） | 107.12.90.10（δ0.05 50×400 ） | 107.11.90.25（δ0.05 50×400 ） |
| Gasket | 107.04.90.06（δ3 ） | 107.04.90.06（δ3 ） | 107.11.90.32（δ8 ） | |
| Windows cover | 107.04.90.07（δ6） | 107.04.102.07（δ6） | 107.04.90.07（δ6） | 107.04.90.07（δ6） |
| oil tubing | 107.15.90.09（φ20×1) | 107.04.90.08（φ21×1) | 107.04.90.08（φ20×1) | 107.04.90.08（φ20×1) |
| Bolt | GB5783-86（M12×25） | GB5783-86（M12×25） | GB5783-86（M12×25） | GB5783-86（M12×25） |
| Washer | GB93-87(12) | GB93-87(12) | GB93-87(12) | GB93-87(12) |
| oil box | 107.06.38.00 | 107.14.60.00 | 107.11.60.00 | 107.11.60.00 |
On-Site Fault Repair Case Studies
Case 1: Worn Rubber Washer Causing Spray Fluid Leakage
A land drilling rig’s Lanzhou LS 3NB1000C mud pump experienced severe spray fluid leakage from the liner spray pump, leading to insufficient cooling of the cylinder liner. On-site inspection revealed severe aging and wear of the model D3-4-67 rubber washer, which had lost its sealing effect. Maintenance staff replaced the rubber washer and matching sealing gaskets, and the leakage was completely resolved, restoring normal cooling fluid supply to the cylinder liner.
Case 2: Clogged Oil Pipeline Leading to Failed Spray Cooling
An offshore drilling site’s LS 3NB1300C mud pump had no spray output from the liner spray pump, causing the cylinder liner temperature to rise rapidly. The fault was traced to a sludge-clogged oil pipeline, blocking fluid flow. Technicians disassembled and cleaned the oil pipeline, replaced deformed pipeline fittings, and flushed the oil box—restoring normal fluid delivery and cooling function within 2 hours.
Case 3: Loose Bolts Causing Abnormal Spray Pump Noise
A drilling team’s LS 3NB1600 mud pump liner spray pump produced loud abnormal noise and unstable spray flow. Inspection found that mounting bolts (GB5783-86 M12×25) had loosened due to long-term vibration, causing frame misalignment. Workers tightened all bolts and replaced worn lock washers, eliminating abnormal noise and ensuring stable spray pump operation.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these liner spray pump parts compatible with all four Lanzhou LS 3NB pump models? | Yes, all parts in this catalog are designed to fully match 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pump liner spray pumps, with uniform OEM dimensions and interfaces, no custom modifications required for installation. |
| How often should rubber washers and sealing gaskets be replaced? | Under normal drilling conditions, replace rubber washers and gaskets every 2500-2800 working hours. In high-temperature, high-corrosion offshore or desert environments, shorten the replacement cycle to 2000 working hours to prevent leakage failures. |
| What is the standard working pressure for these spray pump pipeline components? | The oil pipelines, connectors and sealing parts are rated for a stable working pressure of 0.6-1.2MPa, perfectly matching the operating pressure requirements of the liner spray systems for all four LS 3NB series mud pump models. |
Procurement Guidance
This Lanzhou LS 3NB series mud pump liner spray pump parts list is a professional, reliable one-stop reference for drilling equipment managers, maintenance teams and procurement staff, providing standardized, high-quality spare parts solutions for daily upkeep, emergency repairs and inventory stocking. Using these OEM-standard replacement parts eliminates the risk of part mismatching, quickly resolves common spray pump failures, and protects the critical cylinder liner assembly from overheating and accelerated wear—directly reducing long-term equipment maintenance costs and drilling downtime losses.
