JC21D Drilling Rig Pneumatic and Hydraulic System Spare Parts

1. Core Purpose & Target User Demand

This full range of pneumatic and hydraulic system spare parts covers core models including R431003806 sliding valve, VSP-3301-31 spool valve and SD-00E dual guide valve, professionally designed for ZJ-20 drilling rig, XD-60ZJ-20 carrier air system and JC21D drawworks drum assembly. It targets the precise maintenance, system overhaul and fault replacement needs of oilfield drilling teams, rig maintenance contractors and mechanical supporting service providers. All components comply with API 6D fluid control standards and ISO 4413 hydraulic system specification, effectively solving common field pain points such as unstable pneumatic control response, hydraulic pressure deviation, drawworks braking jitter and sensor data failure. Exclusive bench test data verifies the complete matched system maintains constant pressure output and accurate control response for 1150 consecutive working hours under standard drilling load conditions.

2. Product Introduction

The product portfolio includes full-series fluid control components, detection instruments, power units and mechanical accessory parts for ZJ-20 drilling rig pneumatic & hydraulic systems and XD-60ZJ-20 carrier air systems. The lineup integrates pneumatic reversing valves, pressure regulating valves, shuttle valves, quick release valves, temperature and pressure sensors, Parker gear pumps, multi-stage hydraulic valves and JC21D drawworks special bearings and brake sheaves. Every part adopts industrial-grade forging and precision machining technology, with strict sealing, pressure resistance and fatigue testing during production. All parts achieve full dimensional and performance compatibility with original equipment, forming a complete standardized spare parts supply system for daily maintenance and fault repair of medium-duty drilling rig fluid systems.

3. Functional Description

Each component undertakes independent and collaborative control functions to guarantee stable rig operation. Pneumatic control valves, three-position four-way and two-position three-stage reversing valves accurately switch air circuit logic, solving delayed equipment action faults; combined pressure regulators and manual pressure regulating valves stabilize system air pressure to avoid pressure fluctuation-induced operation failure; shuttle valves and anti-track valves prevent air circuit backflow and signal interference; hydraulic gear pumps and multi-stage spool valves provide stable power output and flow control for hydraulic systems; temperature and pressure senders and gauges realize real-time monitoring of equipment operating parameters; SD-00E dual guide valves and brake supporting parts ensure precise and stable braking control for JC21D drawworks drum.

4. Structural Characteristics

All spare parts adopt oilfield working condition-oriented optimized structural design. Pneumatic valve cores adopt integral precision grinding structure with low friction and high sensitivity, adapting to frequent switching operation; hydraulic valve bodies adopt thickened integral casting structure to resist high-pressure impact; stainless steel ball valves feature corrosion-resistant sealing structure suitable for complex field media environments; temperature and pressure sensors adopt integrated probe structure to improve detection accuracy and stability; drawworks bearings adopt high-precision raceway structure to reduce rotational wear and extend service cycle. Modular assembly design supports fast disassembly and single-part replacement, greatly improving on-site maintenance efficiency.

5. Applicable Working Conditions

This series of fluid control spare parts is fully applicable to onshore conventional oil and gas drilling, geological exploration drilling and well repair operation scenarios. It stably adapts to harsh working conditions including field dust pollution, continuous high-frequency switching, long-term high-pressure load and ambient temperature alternation. Field verification shows all parts can operate stably in the temperature range of -30℃ to 80℃, fully matching the long-cycle continuous operation requirements of ZJ-20 series drilling rigs and supporting carrier equipment.

6. On-Site Maintenance & Engineer Practical Suggestions

Summarized from years of oilfield front-line overhaul experience, standardized maintenance can maximize fluid system stability. Inspect pneumatic pressure regulating valves and quick release valves every 500 working hours to prevent air circuit blockage and pressure leakage; calibrate temperature and pressure gauges and senders every 700 working hours to ensure accurate data monitoring; replace hydraulic needle valves and reversing valve seals every 900 working hours to avoid internal leakage; check drawworks brake sheave and bearing wear regularly to eliminate braking hidden dangers. Avoid long-term overpressure operation of hydraulic pumps to prevent early fatigue damage of power components.

We supply the following spare parts:

7. Field Maintenance Cases

Case 1: Changqing Oilfield, ZJ-20 Drilling Rig, 380kN Continuous Drilling Load

Pneumatic control action lag and unstable air pressure occurred during rig operation. Fault cause: aging R431003806 sliding valve and blocked combined pressure regulator. After component replacement and system debugging, air circuit response delay was eliminated, and system pressure remained constant within rated value for 1150 consecutive working hours. Customer feedback: pneumatic control system operates smoothly with no intermittent failure.

Case 2: Jilin Oilfield, ZJ-20 Hydraulic System, Full Load Lifting Operation

Hydraulic power output was insufficient with obvious pressure fluctuation. Fault cause: wear of Parker P365A278GEAB20-07 gear pump and stuck VSP-3301-31 spool valve. After replacing core hydraulic parts, hydraulic system pressure difference is controlled within 0.3MPa, and lifting power output meets factory standards. Customer feedback: hydraulic system stability is significantly improved.

Case 3: Jianghan Oilfield, XD-60ZJ-20 Carrier, Long-Term Auxiliary Operation

Frequent air leakage of carrier air circuit and insensitive brake control. Fault cause: failure of quick release valve and aging brake relay valve. After replacing matching pneumatic components, zero air leakage is realized, and brake response speed returns to standard level. Customer feedback: carrier auxiliary system failure rate is greatly reduced.

Case 4: Zhongyuan Oilfield, JC21D Drawworks Drum, Recurrent Lifting Load

Drawworks braking jitter and abnormal bearing noise during frequent start-stop operation. Fault cause: worn drawworks bearing and aging SD-00E dual guide valve. After parts replacement and maintenance, braking operation is stable and noise-free, with consistent braking force under variable load. Customer feedback: drawworks operating safety is fully guaranteed.

8. FAQ

9. Procurement & Technical Reference Guidance

This comprehensive suite of pneumatic and hydraulic system spare parts covers all core vulnerable and consumable components for ZJ-20 drilling rigs, XD-60ZJ-20 carriers and JC21D drawworks drums. All products are manufactured in strict accordance with international oilfield equipment authority standards, with repeated field verification of durability and compatibility, effectively solving common faults such as fluid pressure instability, control response delay, air and oil leakage, and braking abnormality. It provides unified, reliable procurement benchmark standards for equipment supporting procurement teams, and systematic professional maintenance technical guidelines for on-site drilling and maintenance personnel. Users can select single replacement parts or customized matching combinations according to actual equipment models, field working conditions and regular maintenance cycles, to stabilize equipment operating performance, reduce on-site downtime frequency, and ensure efficient and safe operation of drilling rig systems.