Product Introduction
This series covers all critical replacement parts for the LSNOI 3NB-1600 mud pump fluid end assembly, including multi-specification pistons, liners (ordinary, bimetallic Cr, bimetallic V), piston rods, spray hoses, valve bodies, valve seats, valve rubbers, studs, nuts, sealing rings, locking clips, suction and discharge manifolds, wear plates, bushes, gaskets and various fasteners. Each part is made of oilfield-grade high-pressure resistant, wear-resistant and corrosion-resistant materials, processed by precision CNC machining, requiring no on-site modification, grinding or secondary processing, suitable for daily fluid end inspection, routine maintenance, seasonal preventive replacement and full fluid end overhaul.
Core Function Specifications
Every component in this fluid end parts lineup is engineered to withstand harsh high-pressure drilling conditions, with verified authoritative performance indicators:
- High-Pressure Pressure Holding Capacity: The whole fluid end system supports a rated working pressure of 35MPa, stably bearing instantaneous hydraulic impact without pressure leakage or component deformation.
- Long-Lasting Wear Resistance: Multi-material liners and pistons adapt to high-abrasion drilling mud, with a continuous service life of up to 4500 working hours under standard working conditions.
- Reliable Sealing Performance: Custom-sized sealing pieces and valve rubbers form a fully closed sealing system, realizing zero leakage of high-pressure mud under long-term vibration and temperature fluctuations.
- Stable Mud Circulation: Precision valve assemblies and manifolds ensure smooth suction and discharge of mud, avoiding cavitation and flow fluctuation.
- Anti-Loosening Fastening: High-strength studs and locking nuts maintain stable clamping force under long-term hydraulic impact and mechanical vibration, preventing joint loosening.
Structural Characteristics
These fluid end parts feature optimized structures suitable for oilfield field maintenance and long-term durable operation:
- Modular Valve Assembly Design: Independent valve body, valve seat and valve rubber components facilitate quick disassembly and replacement, simplifying emergency repair operations.
- Multi-Specification Liner Matching: Complete sizes from Φ140 to Φ190, with three material options, meet different mud pressure and flow requirements of drilling operations.
- Integrated Manifold Structure: Suction and discharge manifolds realize centralized mud circulation, with smooth inner walls to reduce mud scouring and resistance.
- Wear-Resistant Guide & Positioning Structure: Wear plates and bushes reduce friction between components, compensating for wear and prolonging assembly service life.
- Standardized Fastener Configuration: Unified thread specifications and stud sizes ensure interchangeability, simplifying spare parts preparation and inventory management.
Applicable Working Conditions
All fluid end parts adapt to various harsh oilfield drilling scenarios matching the LSNOI 3NB-1600 mud pump:
- Onshore Deep Well & Conventional Drilling: Desert, mountain, plain and remote drilling platforms, adapting to high-abrasion sand-containing mud.
- High-Pressure Mud Circulation Operations: Well drilling, workover and well cementing operations, adapting to long-term full-load continuous operation.
- Wide Ambient Temperature Range: Suitable for extreme temperatures from -40°C to 70°C, keeping material sealing and mechanical properties stable.
- Various Drilling Mud Systems: Compatible with ordinary water-based mud, weighted mud and slightly corrosive drilling fluid, with strong erosion 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 Φ 140 |
| 107.06.66.00 | Piston Φ 150 | |
| 107.06.68.00 | Piston Φ 160 | |
| 107.06.70.00 | Piston Φ 170 | |
| 107.11.130.00 | Piston Φ 180 | |
| 107.11.135.00 | Piston Φ 190 | |
| 307 | 107.04.120.00 | Lock nut M39x3 |
| 308 | 107.11.110.42 | Seal |
| 309 | 107.11.110.21 | Liner Φ 140 |
| 107.11.110.22 | Liner Φ 150 | |
| 107.11.110.23 | Liner Φ 160 | |
| 107.11.110.24 | Liner Φ 170 | |
| 107.11.110.25 | Liner Φ 180 | |
| 107.11.110.26 | Liner Φ 190 | |
| 107.11.110.27 | Liner Φ 140 Bimetal Cr | |
| 107.11.110.28 | Liner Φ 150 Bimetal Cr | |
| 107.11.110.29 | Liner Φ 160 Bimetal Cr | |
| 107.11.110.30 | Liner Φ 170 Bimetal Cr | |
| 107.11.110.31 | Liner Φ 180 Bimetal Cr | |
| 107.11.110.32 | Liner Φ 190 Bimetal Cr | |
| 107.11.110.33 | Liner Φ 140 Bimetal V | |
| 107.11.110.34 | Liner Φ 150 Bimetal V | |
| 107.11.110.35 | Liner Φ 160 Bimetal V | |
| 107.11.110.36 | Liner Φ 170 Bimetal V | |
| 107.11.110.37 | Liner Φ 180 Bimetal V | |
| 107.11.110.37 | Liner Φ 190 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 δ 30 |
| 352 | 107.11.110.57 | Gasket δ 0.5 |
| 353 | 107.11.110.58 | Gasket δ 0.2 |
On-site Fault Repair Cases
Case 1: Pressure Loss Caused by Liner Wear
A drilling rig’s 3NB-1600 mud pump suffered sudden discharge pressure drop and unstable mud flow. After inspection, the Φ160 bimetallic V liner was severely worn by abrasive mud, leading to internal pressure leakage. Maintenance staff replaced the worn liner and matched piston, and the mud pump quickly restored rated working pressure after debugging.
Case 2: High-Pressure Mud Leakage Due to Valve Seal Failure
Obvious high-pressure mud leakage appeared at the valve cover of the mud pump fluid end, affecting on-site construction safety. The valve rubber and valve cover seal were aged and damaged, losing sealing performance. Workers replaced the damaged valve rubber and corresponding seals, retightened the locking studs, and completely eliminated the leakage.
Case 3: Mud Circulation Blockage Triggered by Valve Body Damage
The mud pump suction and discharge were abnormal, with frequent cavitation and noise. The valve body and valve seat were worn and deformed, resulting in poor closing and unsmooth mud circulation. The maintenance team replaced the complete valve assembly, cleaned the manifold, and restored normal mud circulation quickly.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with LSNOI 3NB-1600 mud pump fluid end assembly? | Yes, all parts in this list are custom-designed for the LSNOI Lanzhou LS 3NB-1600 mud pump fluid end assembly (107.11.110.00), fully matching OEM dimensions, material standards and installation requirements with 100% direct interchangeability. |
| How to choose the right liner material and size? | Select liner size (Φ140-Φ190) according to required mud flow and pressure; choose bimetallic Cr/V liners for high-abrasion mud, and ordinary liners for conventional low-abrasion mud systems. |
| What is the standard tightening torque for fluid end studs? | Follow API 7K standards: M30x2 studs torque to 680N·m, M36x3 studs torque to 1100N·m, use a calibrated torque wrench and cross-tightening sequence to ensure uniform stress. |
Procurement Guidance
This LSNOI 3NB-1600 mud pump fluid 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, seasonal replacement and full fluid end overhaul. All supplied parts undergo strict dimensional verification, pressure resistance testing and wear resistance testing, fully complying with API 7K industry standards and original equipment quality requirements, with ultra-high stability and durability.
