Product Introduction
This comprehensive series covers all core replacement parts for the LS-NOV 3NB-1300C mud pump fluid end assembly, including multi-size pistons (φ130-φ180), corresponding standard and bimetallic Cr/V liners, piston rods, valve assemblies (valve body, valve seat, valve rubber), suction and discharge manifolds, valve covers, linings, high-strength studs, locking nuts, various seals, spray hoses, flanges, gaskets, wear plates, supports and full sets of fasteners. Each part is made of oilfield-grade high-pressure-resistant, wear-resistant and corrosion-resistant materials, processed by precision CNC machining and integral pressure testing, achieving 100% direct interchangeability with original fluid end components, requiring no on-site modification, grinding or secondary processing, suitable for daily 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 extreme high-pressure abrasive mud drilling conditions, with verified authoritative performance indicators:
- High-Pressure Mud Pressurization: The complete piston-liner assembly stably outputs rated high-pressure mud, with a pressure retention rate of up to 98% under continuous operation.
- One-Way Sealing Control: Precision valve assemblies realize efficient one-way mud circulation, avoiding backflow and ensuring stable suction and discharge.
- Heavy-Duty Sealing Performance: Custom high-pressure seals form a fully closed sealing system, preventing high-pressure mud leakage under long-term hydraulic impact.
- Stable Reciprocating Motion: High-precision piston rods and liners maintain smooth reciprocating motion, minimizing friction and wear.
- Reliable Fastening Connection: High-strength studs and locking nuts provide stable clamping force, avoiding joint loosening under strong vibration and pressure impact.
Structural Characteristics
These fluid end assembly parts feature optimized structures suitable for oilfield field maintenance and long-term durable operation:
- Modular Fluid End Design: Independent piston-liner, valve and manifold modules enable targeted disassembly and replacement, simplifying overhaul operations.
- Multi-Size Compatible Liners & Pistons: Full range of φ130-φ180 standard and bimetallic liners/pistons meet diverse drilling construction needs, with strong compatibility.
- Integral Forged Pressure-Bearing Components: High-strength integral forged valve covers and manifolds avoid deformation or cracking under high-pressure load.
- Targeted Lubrication & Cooling: Matching spray hoses provide timely flushing and cooling for liners, reducing friction heat and abrasive wear.
- Standardized Fastening System: Unified high-strength fasteners with anti-loosening design, ensuring stable connection under harsh working conditions.
Applicable Working Conditions
All fluid end assembly parts adapt to various harsh oilfield drilling scenarios matching the LS-NOV 3NB-1300C mud pump:
- High-Pressure Drilling Operations: Onshore deep well, conventional drilling, workover and well cementing operations, adapting to 35MPa rated high-pressure mud delivery.
- Abrasive Mud Environment: Suitable for sand-containing, high-solid-content abrasive drilling mud, with ultra-strong scouring and erosion resistance.
- Harsh Outdoor Environments: Desert, mountain, cold and hot region drilling platforms, adapting to ambient temperatures ranging from -40℃ to 75℃.
- Continuous Heavy-Load Operation: 24-hour uninterrupted reciprocating operation, resisting frequent hydraulic impact and mechanical vibration.
We supply the following spare parts:
| 107.12.110.00 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 | 107.06.62.00 | Piston φ130 |
| 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 | |
| 307 | 107.04.120.00 | Lock nut M39x3 |
| 308 | 107.11.110.42 | Seal |
| 309 | 107.12.110.04 | Liner φ130 |
| 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 | |
| 107.12.110.05 | Liner φ130 Bimetal Cr | |
| 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 | |
| 107.12.110.05 | Liner φ130 Bimetal V | |
| 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 | |
| 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 | 107.12.110.03 | 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 | 107.12.111.00 | Suction manifold |
| 334 | 107.11.112.05 | Flange |
| 335 | 107.11.110.06 | 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 | 107.12.110.07 | Gasket δ1 |
| 352 | 107.12.110.08-1 | Gasket δ30 |
| 353 | 107.11.110.58 | Gasket δ0.2 |
On-site Fault Repair Cases
Case 1: High-Pressure Mud Leakage Caused by Seal Failure
Obvious high-pressure mud leakage occurred at the liner end cover, leading to unstable discharge pressure and reduced mud output. The high-pressure seal was aged, worn and lost sealing performance. Maintenance staff replaced the matching seal, cleaned the sealing surface, retightened the locking nuts, and completely eliminated the leakage fault.
Case 2: Insufficient Mud Pressure Due to Worn Piston & Liner
The mud pump discharge pressure dropped sharply and could not reach rated working pressure, with abnormal internal noise. The piston and liner were severely worn due to long-term abrasive mud scouring, resulting in excessive clearance. Workers replaced the worn piston and matching bimetallic liner, adjusted the assembly clearance, and restored normal pressure output.
Case 3: Mud Backflow Caused by Damaged Valve Rubber
The fluid end produced periodic backflow noise, and mud delivery volume was insufficient. The valve rubber was cracked and deformed, failing to realize effective one-way sealing. Technicians replaced the damaged valve rubber, cleaned the valve seat and guide ring, and restored normal one-way mud circulation.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with LS-NOV 3NB-1300C mud pump fluid end assembly? | Yes, all parts in this list are custom-designed for the LS-NOV 3NB-1300C mud pump fluid end assembly (107.12.110.00), fully matching OEM dimensions, material standards and installation requirements with 100% direct interchangeability. |
| What is the difference between standard liners and bimetallic Cr/V liners? | Bimetallic Cr/V liners feature a high-hardness alloy inner layer (HRC 62), with 3x longer wear life than standard liners, specially designed for high-abrasion sand-containing mud drilling conditions. |
| What is the standard wear clearance limit for piston and liner assemblies? | The maximum allowable wear clearance for piston-liner pairing is 0.3mm; once exceeding this value, components should be replaced immediately to avoid pressure loss and leakage. |
Procurement Guidance
This LS-NOV 3NB-1300C 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, routine replacement and full fluid end overhaul. All supplied parts undergo strict dimensional verification, high-pressure hydraulic testing and wear resistance testing, fully complying with API 7K industry standards and original equipment quality requirements, with ultra-high pressure resistance, wear resistance and safety stability.
