Product Introduction
This series of power end replacement parts covers all core components suitable for Lanzhou LS 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pumps, including pistons of various specifications, bi-metal liners, piston rod clamps, rid pistons, suction & discharge manifolds, valve bodies, valve seats, valve rings, high-strength studs, lock nuts, seals, spray hoses, spray pumps, liner end covers, locking plates, cages, gaskets, flanges and other matching fittings. All parts are made of high-strength alloy steel, wear-resistant polymer and bi-metal composite materials, processed with precision CNC equipment to ensure perfect fit with original assembly interfaces, requiring no on-site modification or secondary processing. The universal design across four pump models simplifies spare parts inventory and procurement, meeting the needs of daily routine maintenance, emergency fault repair and full power end overhaul.
Structural Design Features
These power end parts prioritize heavy-load durability, precise fitting and convenient on-site maintenance, fully adapted to harsh drilling site environments:
- Bi-Metal Liner Design: High-chromium bi-metal liners adopt integral centrifugal casting process, with high surface smoothness and wear resistance, reducing piston wear and improving pressure retention.
- Precision Valve Assembly: Valve bodies and valve seats are precisely matched, with smooth sealing surfaces, ensuring rapid and reliable opening and closing, and stable mud suction and discharge.
- Dual Anti-Loosening Structure: High-strength studs matched with lock nuts and locking plates, providing dual anti-loosening protection, eliminating fastener failure caused by equipment vibration.
- Modular Replacement Design: Pistons, liners, seals and other wearing parts can be independently disassembled and replaced, reducing on-site maintenance workload and repair time.
- Integrated Manifold Structure: Suction and discharge manifolds feature integrated forming design, with smooth mud passages, reducing mud erosion and ensuring smooth fluid delivery.
Applicable Operating Conditions
This series of power end parts performs stably in various harsh drilling scenarios, with strong environmental adaptability:
- Onshore Drilling Operations: Land deep-well rigs, desert drilling platforms, mountain and frozen soil drilling sites, adapting to high load, large temperature differences and continuous mud erosion.
- Offshore Drilling Operations: Offshore platforms and jack-up drilling rigs, resisting salt spray corrosion, high humidity and wave-induced continuous vibration.
- High-Abrasion Mud Conditions: Suitable for high-viscosity, sand-containing, corrosive drilling mud, with strong erosion and corrosion resistance of core components.
- Continuous Full-Load Operation: Adapting to 24-hour uninterrupted drilling construction, maintaining stable performance under long-term heavy-load reciprocating motion.
Maintenance & Service Recommendations
To prolong the service life of the power end assembly and avoid unexpected failures, follow these API-standardized maintenance protocols:
- Daily Inspection: Check for high-pressure mud leakage at manifold and liner joints; monitor abnormal noise and vibration during pump operation; inspect spray hose and lubrication system status.
- Weekly Maintenance: Tighten high-strength studs and lock nuts to rated torque; clean mud deposits on the surface of the power end; check the firmness of locking plates.
- Monthly Maintenance: Inspect pistons, liners and seals for wear, aging or damage, replace worn parts promptly; check valve body and valve seat sealing performance.
- Quarterly Maintenance: Overhaul the internal reciprocating mechanism, clean the spray pump system; calibrate the torque of all fasteners; replace severely worn wearing parts.
- Storage Requirements: Store spare parts in a dry, ventilated and dust-free environment; rubber seals and pistons should be protected from direct sunlight and high temperature 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 | 107.15.110.00 | 107.14.110.00 | 107.12.110.00 | 107.11.110.00 |
| Rid pistion | 107.15.110.23 | 107.14.110.39 | 107.11.110.39 | 107.11.110.39 |
| Nipple | 107.15.110.22 | 107.14.126.00 | 107.11.110.20 | |
| pistion rod clamp | 107.15.140.00 | 107.14.125.00 | 107.11.114.00 | 107.11.114.00 |
| spary hose | 107.14.124.00 | 107.14.124.00 | 107.11.113.00-1 | 107.11.113.00-1 |
| Liner end cover | 107.15.110.21 | 107.14.110.17 | 107.11.110.19 | |
| Sparying pump | 107.12.116.00 | |||
| Pistion | 107.06.58.00(φ110) | |||
| Pistion | 107.06.60.00(φ120) | 107.06.60.00(φ120) | ||
| Pistion | 107.06.62.00(φ130) | 107.06.62.00(φ130) | 107.06.62.00(φ130) | |
| Pistion | 107.06.64.00(φ140) | 107.06.64.00(φ140) | 107.06.64.00(φ140) | 107.06.64.00(φ140) |
| Pistion | 107.06.66.00(φ150) | 107.06.66.00(φ150) | 107.06.66.00(φ150) | 107.06.66.00(φ150) |
| Pistion | 107.06.68.00(φ160) | 107.06.68.00(φ160) | 107.06.68.00(φ160) | 107.06.68.00(φ160) |
| Pistion | 107.06.70.00(φ170) | 107.06.70.00(φ170) | 107.06.70.00(φ170) | |
| Pistion | 107.11.130.00(φ180) | 107.11.130.00(φ180) | ||
| Pistion | 107.11.135.00(φ190) | |||
| Lock nut | 107.04.120.00(M39×3) | 107.04.120.00(M39×3) | 107.04.120.00(M39×3) | 107.04.120.00(M39×3) |
| seal | 107.04.08 | 107.04.09（φ190×φ178×8.6） | 107.11.110.42 | 107.11.110.42 |
| Liner | 107.15.110.09(双金属 Cr) | |||
| Liner | 107.15.110.10(双金属 Cr) | 107.14.110.18(双金属 Cr) | ||
| Liner | 107.15.110.11(双金属 Cr) | 107.14.110.19(双金属 Cr) | 107.12.110.04(20) | |
| Liner | 107.15.110.12(双金属 Cr) | 107.14.110.20(双金属 Cr) | 107.11.110.21(20) | 107.11.110.21(20) |
| Liner | 107.15.110.13(双金属 Cr) | 107.14.110.21(双金属 Cr) | 107.11.110.22(20) | 107.11.110.22(20) |
| Liner | 107.15.110.14(双金属 Cr) | 107.14.110.22(双金属 Cr) | 107.11.110.23(20) | 107.11.110.23(20) |
| Liner | 107.14.110.23(双金属 Cr) | 107.11.110.24(20) | 107.11.110.24(20) | |
| NAME | PART NO | |||
| NAME | 3NB500C | 3NB1000C | 3NB1300C | 3NB1600 |
| Slush pump | 107.15.00 | 107.14.00 | 107.12.00 | 107.11.00 |
| Description | 107.15.110.00 | 107.14.110.00 | 107.12.110.00 | 107.11.110.00 |
| Stud | 107.15.110.06 | 107.05.110.69(M39×3) | 107.11.110.17 | 107.11.110.17 |
| Ring threaded | 107.15.110.05 | 107.14.110.07 | 107.11.110.03 | 107.11.110.03 |
| Cover | 107.15.110.33 | 107.14.110.05 | 107.11.110.01 | 107.11.110.01 |
| Stud | 107.15.110.20 | 107.04.110.06 | 107.11.110.02 | 107.11.110.02 |
| Seal | 107.04.110.55 | 107.04.110.55 | 107.11.110.05 | 107.11.110.05 |
| Valve cover | 107.14.110.08 | 107.14.110.08 | 107.11.340.00 | 107.11.340.00 |
| seal | 107.10.110.03 | 107.10.110.03 | 107.10.110.03 | 107.10.110.03 |
| stud | 107.15.110.28 | 107.14.110.09 | 107.11.110.06 | 107.11.110.06 |
| Nut | C3-9-92(M30×2) | C3-9-92(M30×2) | C3-9-92(M36×3) | C3-9-92(M36×3) |
| Discharge manifold | 107.15.110.01 | 107.14.110.31 | 107.12.110.03 | 107.11.110.15 |
| seal | 107.04.110.21（φ155×φ140×10） | 107.04.110.21（φ155×φ140×10） | 107.04.110.21（φ155×φ140×10） | 107.04.110.21（φ155×φ140×10） |
| Module studded | 107.15.110.34 | 107.14.110.14 | 107.11.110.14-2 | 107.11.110.14-2 |
| Seal | 107.15.110.32 | 107.14.110.13 | 107.11.110.68 | 107.11.110.68 |
| Locking plate | 107.15.110.29 | 107.14.110.10 | 107.11.110.65-1 | 107.11.110.65-1 |
| Cage | 107.15.110.31 | 107.14.110.12 | 107.11.330.00 | 107.11.330.00 |
| Locking plate | 107.14.110.11 | 107.14.110.11 | 107.11.110.52-1 | 107.11.110.52-1 |
| Hand | 107.15.110.26 | 107.14.110.30 | ||
| Seal | 107.04.110.13（φ210×φ180×15） | 107.04.110.13（φ210×φ180×15） | 107.04.110.13（φ210×φ180×15） | 107.04.110.13（φ210×φ180×15） |
| Suction manifold | 107.15.111.00 | 107.14.111.00 | 107.12.111.00 | 107.11.112.00 |
| Flange | 107.04.110.03-1 | 107.11.112.05 | 107.11.110.59 | 107.11.110.59 |
| Seal | 107.04.110.45 | 107.11.110.60 | 107.11.110.60 | 107.11.110.60 |
| Bolt | GB5782-86(M20×75) | GB5782-86(M20×90) | GB5782-86(M20×90) | GB5782-86(M20×90) |
| Nut | GB6170-86(M20) | GB6170-86(M20) | GB6170-86(M20) | GB6170-86(M20) |
| Washer | GB93-87(20) | GB93-87(20) | GB93-87(20) | GB93-87(20) |
| NAME | PART NO | |||
| NAME | 3NB500C | 3NB1000C | 3NB1300C | 3NB1600 |
| Slush pump | 107.15.00 | 107.14.00 | 107.12.00 | 107.11.00 |
| Description | 107.15.110.00 | 107.14.110.00 | 107.12.110.00 | 107.11.110.00 |
| Liner bushing | 107.15.110.25 | 107.14.110.15 | 107.11.110.18-1 | 107.11.110.18-1 |
| Wear plate | 107.15.110.24 | 107.14.110.16 | 107.11.110.43 | 107.11.110.43 |
| Valve body | 107.04.140.01 | 107.04.140.01 | 107.11.140.01 | 107.11.140.01 |
| Nut | 107.04.140.02 | 107.04.140.02 | 107.11.140.03 | 107.11.140.02 |
| Valve seat | 107.04.140.03 | 107.04.140.03 | 107.11.140.03 | 107.11.140.03 |
| Valve ring | 107.04.140.04 | 107.04.140.04 | 107.11.140.04 | 107.11.140.04 |
| Guide ring | 107.04.140.05 | 107.04.140.05 | 107.11.140.05-1 | 107.11.140.05-1 |
| Spring | 107.04.110.57 | 107.04.110.57 | 107.11.110.16 | 107.11.110.16 |
| Bolt | 107.04.110.50 | GB5783-86(M24×60) | GB5783-86(M24×60) | GB5783-86(M24×60) |
| Gasket | GB93-87(24) | GB93-87(24) | GB93-87(24) | GB93-87(24) |
| Flange | 107.04.110.16-1 | 107.11.110.59 | 107.11.110.59 | 107.11.110.59 |
| Plug | GB3289.31-82(R2) | GB3289.31-82(R2) | GB3289.31-82(R2) | GB3289.31-82(R2) |
| Gasket | 107.15.110.02 | 107.14.110.03(δ12) | 107.12.110.07(δ1) | 107.11.110.56-1(δ30) |
| Gasket | 107.15.110.03 | 107.14.110.02(δ1) | 107.12.110.08-1(δ30) | 107.11.110.57(δ0.5) |
| Gasket | 107.15.110.04 | 107.14.110.01(δ0.25) | 107.11.110.58(δ0.2) | |
| Nut | C3-9-92(M30×2) | C3-9-92(M36×3) | 107.04.110.29(M39×3) | 107.04.110.29(M39×3) |
| Bolt | GB5782-86(M20×55) | GB5782-86(M24×60) | GB5782-86(M24×90) | GB5782-86(M20×90) |
| Nut | GB6170-86(M20) | GB6170-86(M24) | GB6170-86(M24) | GB6170-86(M20) |
| Gasket | GB93-87(20) | GB93-87(24) | GB93-87(24) | GB93-87(20) |
| plate | 107.12.111.05 | |||
| support | 107.15.111.04 | 107.14.111.02 | 107.12.111.06 | |
| support | 107.11.110.54 | |||
| support | 107.11.110.55 | |||
| stud | 107.11.110.12-1 | 107.11.110.12-1 | ||
On-Site Fault Repair Case Studies
Case 1: Worn Piston & Liner Causing Pressure Instability
A land deep-well drilling rig’s Lanzhou LS 3NB1000C mud pump suffered from unstable discharge pressure and insufficient mud flow. On-site inspection revealed severe wear between the piston (107.06.64.00 φ140) and bi-metal liner, leading to high-pressure mud backflow. Maintenance personnel replaced the worn piston and matching liner, re-adjusted the assembly clearance, and the mud pump pressure returned to normal, restoring stable operation.
Case 2: Damaged Seal Triggering High-Pressure Mud Leakage
An offshore drilling site’s LS 3NB1300C mud pump had serious mud leakage at the power end manifold joint. Long-term high-pressure impact and mud erosion caused the seal (107.04.110.21) to age and fail, losing sealing performance. Technicians removed the damaged seal, cleaned the mounting surface, installed a new high-pressure seal, and completely eliminated the leakage fault.
Case 3: Loose Studs Causing Abnormal Power End Vibration
A drilling team’s LS 3NB1600 mud pump generated severe abnormal vibration and noise during full-load operation. Inspection found that the high-strength studs connecting the manifold were loose due to long-term high-frequency vibration, leading to poor assembly fitting. Workers re-tightened all studs and lock nuts, replaced damaged locking plates, and eliminated vibration and noise, ensuring stable operation of the power end.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these power end parts compatible with all four Lanzhou LS 3NB mud pump models? | Yes, all parts in this catalog are precisely designed to match 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pump power end assemblies, with OEM-standard dimensions and perfect interface fitting, no on-site modification required for installation. |
| What is the service life of bi-metal liners under normal operation? | Under standard drilling conditions, adequate lubrication and normal mud quality, bi-metal chromium-plated liners have a service life of 3000-3500 working hours; in high-abrasion sand-containing mud environments, the replacement cycle should be shortened appropriately. |
| What torque standard should be followed for installing power end high-strength studs? | All high-strength studs should be tightened following API 7K standard torque: M20 studs at 320-350N·m, M30 studs at 850-900N·m, M36 studs at 1100-1150N·m, M39 studs at 1300-1350N·m to ensure firm installation. |
Procurement Guidance
This Lanzhou LS 3NB series mud pump power end assembly parts list is a professional and reliable reference for drilling equipment management, maintenance and procurement teams, providing standardized, high-strength and high-wear-resistance spare parts solutions for daily maintenance, emergency fault repair and spare parts inventory preparation. Using these OEM-standard replacement parts can effectively avoid the risks of poor fitting, substandard strength and short service life caused by non-standard parts, quickly resolve common power end failures, reduce equipment downtime and long-term maintenance costs.
