Spare Parts Suite for HNA2500, HT400 and RGF Series Mud Pumps

Spare Parts Suite for HNA2500, HT400 and RGF Series Mud Pumps

1. Product Overview & Core Application Value

This comprehensive fluid end spare parts portfolio is professionally manufactured and supplied to fully match HNA2500, HT400 and RGF series industrial mud pumps, covering complete fluid end assemblies, cylinder liners, piston rods, valve assemblies, sealing kits, fasteners, spring components and gauge connection accessories. Tailored to the actual operation pain points of oilfield drilling and workover equipment, it solves common on-site failures including high-pressure fluid leakage, valve seating failure, liner abrasive wear, spring fatigue failure and inaccurate pressure monitoring. All products are manufactured in strict accordance with API 7K international petroleum equipment specifications and pass 168-hour continuous cyclic fatigue bench tests. Field verified data shows the overall matching assembly can extend the overhaul cycle of pump fluid end by 1900 working hours compared with ordinary accessories. This product set provides standardized procurement basis and professional technical troubleshooting guidelines for oilfield operation teams, equipment maintenance personnel and engineering procurement departments, meeting full-cycle operation and maintenance demands of HNA2500, HT400 and RGF series mud pumps.

2. Product Core Introduction

2.1 Functional Description

Each component undertakes independent and collaborative core functions to ensure stable operation of mud pump fluid end. The integral fluid end assembly and cylinder liner form a closed pressure-bearing cavity to support high-pressure mud conveying. Piston rod, plunger clamp and pressure spring assemblies provide stable power reciprocating drive. Suction and discharge valve assemblies, valve seats and valve springs control one-way fluid circulation and avoid medium backflow. Various O-rings, sealing gaskets and packing sets eliminate high-pressure leakage gaps at assembly joints. Gauge connection accessories and pressure rings ensure real-time accurate monitoring of internal pump pressure. Fasteners including flange bolts, flat washers and circlips maintain structural fastening stability under long-term high-frequency vibration.

2.2 Structural Characteristics

All parts adopt precision forging and CNC finishing process with micron-level tolerance control. Cylinder liners and wear discs adopt high-chrome alloy wear-resistant treatment, with inner wall roundness error controlled within 0.015mm. Sealing components adopt modified HNBR rubber materials, adapting to high-temperature and abrasive mud medium erosion. Spring parts undergo integral tempering treatment to avoid elastic fatigue failure under cyclic load. All positioning and fastening structures adopt field-verified foolproof design, realizing rapid assembly and precise matching. Key pressure-bearing components pass 1.5 times rated working pressure hydrostatic test, fully complying with API 7K pressure-bearing safety standards.

2.3 Applicable Working Conditions

This series of spare parts is exclusively applicable to HNA2500, HT400 and RGF series mud pumps, widely used in onshore deep well drilling, offshore well workover and high-solid mud circulation scenarios. It stably adapts to continuous working pressure up to 7500PSI, high-frequency vibration operation and high-abrasive drilling fluid environment, and maintains stable structural performance in the temperature range of -35℃ to 90℃, suitable for long-duration uninterrupted operation of large drilling rigs.

2.4 Field Maintenance & Engineer Practical Suggestions

Summarized from years of oilfield first-line maintenance experience: Replace O-rings, packing sets and liner seals every 2400 working hours to prevent aging and pressure leakage. Inspect valve spring elasticity and valve seat fitting status every 600 hours, replace failed parts in time to avoid fluid backflow. Check cylinder liner wear every 1200 hours and replace wear discs when inner wall wear exceeds the limit. Synchronously replace fastening washers and flange bolts during fluid end overhaul to eliminate hidden loosening risks. It is forbidden to mix ordinary standard parts with special customized accessories to avoid assembly gaps and structural failure.

We supply the following spare parts:

3. On-Site Field Maintenance Cases

3.1 Case 1: Tarim Oilfield HNA2500 Mud Pump

Working load: Long-term 6800PSI deep well high-pressure operation; Fault phenomenon: Discharge flange O-ring aging leading to mud leakage and pressure drop; Repair scheme: Replace 600S-3”-25 discharge flange O-ring and matching pressure ring; Post-repair index: Zero leakage after 96-hour continuous operation, pump discharge pressure fully restored; Customer feedback: Sealing performance is stable, completely solves long-term pressure loss fault.

3.2 Case 2: Daqing Oilfield HT400 Mud Pump

Working load: High-frequency cyclic mud circulation operation; Fault phenomenon: Valve spring fatigue failure causing unsmooth fluid discharge; Repair scheme: Replace HT-400-4.5-27 pressure spring and 1000S-3”-4 valve seat assembly; Post-repair index: Fluid circulation efficiency increased significantly, no jamming phenomenon; Customer feedback: Parts matching precision is high, equipment operation stability improved obviously.

3.3 Case 3: Shengli Oilfield RGF Series Mud Pump

Working load: High-solid abrasive mud working condition; Fault phenomenon: Cylinder liner severe wear leading to reduced pump efficiency; Repair scheme: Replace P1600125AA cylinder liner and RGF1300-05-16 liner seal; Post-repair index: Pump volumetric efficiency recovered to factory standard value; Customer feedback: Wear resistance is far better than ordinary accessories, adapting to harsh mud working conditions.

3.4 Case 4: Bohai Offshore Oilfield HNA2500 Mud Pump

Working load: 7200PSI limit pressure intermittent operation; Fault phenomenon: Piston rod seal failure causing internal mud channel blockage; Repair scheme: Replace RGF1000-05-21 piston rod and Vail seal assembly; Post-repair index: Pump operation noise reduced, pressure fluctuation controlled within 60PSI; Customer feedback: Effectively adapts to offshore high-corrosion environment, low failure rate.

4. Frequently Asked Questions

5. Procurement Guidance

This complete set of fluid end spare parts covers all core pressure-bearing, transmission and sealing vulnerable components required for daily maintenance and overhaul of HNA2500, HT400 and RGF series mud pumps. With standardized production processes, strict quality inspection standards and excellent field adaptability, it effectively reduces equipment downtime and comprehensive operation and maintenance costs. The complete parameter system and professional maintenance guidelines can serve as unified reference standards for enterprise equipment centralized procurement and on-site technical fault elimination. We support targeted parts matching and bulk procurement according to actual equipment operating conditions, working environment and maintenance plans, with professional technical matching services to ensure all purchased components meet the long-term stable operation requirements of field drilling equipment.