Product Introduction
This series of replacement parts covers all core matching components of the LSNOI 3NB-1600 mud pump fluid end assembly, including piston rods, nipples, piston rod clamps, spray hoses, liner end covers, multi-size pistons, lock nuts, various seals, single & bimetallic liners (φ140-φ190), end covers, high-strength studs, nuts, threaded rings, bushes, valve covers, valve cages, discharge & suction manifolds, valve bodies, valve seats, valve rubbers, guide rings, springs, brackets, gaskets and other complete fittings. Every part is made of high-strength alloy steel, wear-resistant bimetallic materials and high-pressure polymer sealing materials, processed by precision CNC machining to ensure perfect fit with original assembly interfaces, requiring no on-site modification or secondary processing. The parts support quick disassembly and assembly, suitable for daily routine maintenance, emergency leakage repair and full fluid end overhaul.
Core Functional Specifications
Each component is engineered to withstand extreme high-pressure drilling site conditions, with clear authoritative performance indicators to ensure stable and safe field operation:
- High-Pressure Bearing Capacity: The entire fluid end assembly supports a rated working pressure of up to 35MPa, fully adapting to the high-pressure mud delivery requirements of the 1600HP mud pump, resisting instantaneous hydraulic impact and long-term pressure fluctuation.
- Wear Resistance Performance: Bimetallic composite liners and hardened valve seats have ultra-high anti-scouring and anti-wear properties, with a service life of over 4000 working hours in high-abrasion mud environments.
- Sealing Reliability: Special high-pressure seals adopt wear-resistant and mud-resistant formulas, achieving zero high-pressure mud leakage under continuous alternating stress, with stable sealing performance under high and low temperature changes.
- Fastener Stability: 12.9-grade high-strength studs and nuts maintain stable locking torque under long-term high-frequency vibration, avoiding loosening or fracture caused by hydraulic impact.
Structural Design Features
These fluid end parts prioritize high-pressure safety, wear resistance and convenient on-site maintenance, fully adapting to harsh oilfield drilling high-pressure working environments:
- Modular Fluid End Design: Independent module studded structure facilitates quick replacement of wearing parts, reducing overall disassembly workload and on-site maintenance time.
- Dual-Material Liner Design: Optional single-metal and Cr/V bimetallic liners meet different mud working conditions, balancing wear resistance and procurement costs.
- Precision Valve Assembly Structure: Valve body, valve seat and guide ring adopt precision matching design, ensuring smooth valve opening and closing, avoiding mud jamming and improving sealing performance.
- Multi-Layer Sealing Protection: Double-layer sealing rings and gaskets are arranged at key high-pressure joints, effectively preventing high-pressure mud leakage and external impurity intrusion.
- Reinforced Fixing Structure: Large quantities of high-strength studs and nuts are evenly arranged to ensure uniform stress on the fluid end shell, avoiding local deformation under high pressure.
Applicable Operating Conditions
This series of fluid end parts performs stably in various harsh high-pressure 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 high-abrasion sand-containing mud, 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.
- High-Pressure Continuous Operation: Adapting to 24-hour uninterrupted high-pressure mud delivery, maintaining stable performance under long-term full-load and high-impact conditions.
- Corrosive Mud Environments: Suitable for weakly corrosive drilling mud systems, with bimetallic liners and special seals having excellent corrosion resistance.
We supply the following spare parts:
| 107.11.110.00 Fluid End Assembly | ||
| Item No. | Part No. | Description |
| 301 | 107.11.110.39 | Piston rod |
| 302 | 107.11.110.20 | Nipple |
| 303 | 107.11.114.00 | Piston rod clamp |
| 304 | 107.11.113.00-1 | Spray hose |
| 305 | 107.11.110.19 | Liner end cover |
| 306 | 107.06.64.00 | Piston φ140 |
| 107.06.66.00 | Piston φ150 | |
| 107.06.68.00 | Piston φ160 | |
| 107.06.70.00 | Piston φ170 | |
| 107.11.130.00 | Piston φ180 | |
| 107.11.135.00 | Piston φ190 | |
| 307 | 107.04.120.00 | Lock nut M39x3 |
| 308 | 107.11.110.42 | Seal |
| 309 | 107.11.110.21 | Liner φ140 |
| 107.11.110.22 | Liner φ150 | |
| 107.11.110.23 | Liner φ160 | |
| 107.11.110.24 | Liner φ170 | |
| 107.11.110.25 | Liner φ180 | |
| 107.11.110.26 | Liner φ190 | |
| 107.11.110.27 | Liner φ140 Bimetal Cr | |
| 107.11.110.28 | Liner φ150 Bimetal Cr | |
| 107.11.110.29 | Liner φ160 Bimetal Cr | |
| 107.11.110.30 | Liner φ170 Bimetal Cr | |
| 107.11.110.31 | Liner φ180 Bimetal Cr | |
| 107.11.110.32 | Liner φ190 Bimetal Cr | |
| 107.11.110.33 | Liner φ140 Bimetal V | |
| 107.11.110.34 | Liner φ150 Bimetal V | |
| 107.11.110.35 | Liner φ160 Bimetal V | |
| 107.11.110.36 | Liner φ170 Bimetal V | |
| 107.11.110.37 | Liner φ180 Bimetal V | |
| 107.11.110.37 | Liner φ190 Bimetal V | |
| 310 | 107.11.110.40 | Cover |
| 311 | 107.11.110.41-1 | Stud |
| 312 | C3-9-92 | Nut M30x2 |
| 313 | 107.04.110.29 | Nut M39x3 |
| 314 | 107.11.110.17 | Stud |
| 315 | 107.11.110.03 | Ring threaded |
| 316 | 107.11.110.01 | Cover |
| 317 | 107.11.110.02 | Stud |
| 318 | 107.11.110.67 | Bush |
| 319 | 107.11.110.05 | Seal valve cover |
| 320 | 107.11.340.00 | Valve cover |
| 321 | 107.10.110.03 | Seal |
| 322 | 107.11.110.06 | Stud |
| 323 | C3-9-92 | Nut M36x3 |
| 324 | 107.11.110.15 | Discharge manifold |
| 325 | 107.04.110.21 | Seal φ155xφ140×10 |
| 326 | 107.11.110.14-2 | Module studded |
| 327 | 107.11.110.68 | Seal |
| 328 | 107.11.110.65-1 | Locking plate |
| 329 | 107.11.330.00 | Cage |
| 330 | 107.11.110.52-1 | Locking clip |
| 331 | 107.11.110.12-1 | Stud |
| 332 | 107.04.110.13 | Seal φ210x180x15 |
| 333 | 107.11.112.00 | Suction manifold |
| 334 | 107.11.110.59 | Flange |
| 335 | 107.11.110.60 | Seal |
| 336 | GB5782-86 | Bolt M20x90 |
| 337 | GB6170-86 | Nut M20 |
| 338 | GB93-87 | Washer 20 |
| 339 | 107.11.110.18-1 | Liner bushing |
| 340 | 107.11.110.43 | Wear plate |
| 341 | 107.11.140.01 | Valve body |
| 342 | 107.11.140.02 | Nut |
| 343 | 107.11.140.03 | Valve rubber |
| 344 | 107.11.140.04 | Valve seat |
| 345 | 107.11.140.05-1 | Guide ring |
| 346 | 107.11.110.16 | Spring |
| 347 | GB5783-86 | Bolt M24x60 |
| 348 | GB93-87 | Washer 24 |
| 349 | 107.11.111.54 | Support |
| 350 | 107.11.111.55 | Support |
| 351 | 107.11.110.56-1 | Gasket δ30 |
| 352 | 107.11.110.57 | Gasket δ0.5 |
| 353 | 107.11.110.58 | Gasket δ0.2 |
On-Site Fault Repair Case Studies
Case 1: Worn Liner Causing Insufficient Discharge Pressure
A land deep-well rig’s LSNOI 3NB-1600 mud pump suffered from insufficient discharge pressure and unstable mud flow. On-site inspection revealed that the ordinary single-metal liner was severely worn by high-abrasion mud, resulting in internal pressure leakage. Maintenance personnel replaced it with a bimetallic chromium liner, replaced matching piston seals, and the discharge pressure returned to normal rated value.
Case 2: Damaged Valve Rubber Triggering High-Pressure Leakage
An offshore drilling site’s 3NB-1600 mud pump had high-pressure mud leakage at the valve cover position. Long-term hydraulic impact and mud erosion caused the valve rubber to lose elasticity and wear, leading to sealing failure. Technicians replaced the damaged valve rubber, valve seat and matching guide ring, and completely eliminated the leakage fault.
Case 3: Loose Studs Causing Fluid End Vibration
A drilling team’s 3NB-1600 mud pump showed severe abnormal vibration and slight mud leakage during full-load operation. Inspection found that multiple high-strength studs were loose due to continuous hydraulic impact, leading to uneven stress on the fluid end. Workers re-tightened all studs to rated torque, replaced worn nuts and sealing gaskets, and restored stable operation of the fluid end.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these fluid 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 fluid end assembly (107.11.110.00), with OEM-standard dimensions and perfect high-pressure interface fitting, no on-site modification required for installation. |
| What is the difference between single-metal and bimetallic liners? | Single-metal liners are suitable for conventional low-abrasion mud, with cost-effective performance; Cr/V bimetallic liners have higher surface hardness and wear resistance, suitable for high-abrasion sand-containing mud, with a service life 50%-60% longer than single-metal liners. |
| What is the standard tightening torque for fluid end high-strength studs? | Per API 7K standards, M30×2 studs use 750-800N·m torque, M36×3 studs use 1100-1150N·m torque; tighten evenly in a crosswise sequence to ensure uniform sealing pressure and avoid local deformation. |
Procurement Guidance
This LSNOI 3NB-1600 mud pump fluid end assembly parts list is a professional and reliable reference for oilfield drilling equipment management, high-pressure fluid system maintenance and spare parts procurement teams, providing standardized, high-pressure-resistant and ultra-wear-resistant spare parts solutions for daily routine maintenance, emergency leakage repair and spare parts inventory preparation. Using these OEM-standard replacement parts can effectively avoid the risks of poor fitting, insufficient pressure resistance and short service life caused by non-standard parts, quickly resolve common fluid end faults, and ensure the efficient and stable operation of mud pump equipment.
