XJ-450 XJ-550 DQ450DBZ 3NB Series Oilfield Drilling Rig Full Spare Parts

1. Core Product Orientation & Target Application

This comprehensive lineup of precision-engineered spare parts is custom-manufactured for XJ-450 workover rigs, XJ-550 lifting equipment, DQ450DBZ drilling pump systems, and 3NB-1300F/3NB-1600F mud pump assemblies, covering high-performance O-rings, J-sealing rings, hydraulic cylinder seals, bearings, valves, filters, clutches, and critical wear components for BOMCO, Lanshou LS, GH3161, and Lanzhou LS branded equipment. Target users include on-site drilling maintenance supervisors, hydraulic system engineers, procurement specialists, and field mechanics—professionals grappling with catastrophic bearing failure, premature seal degradation, valve blockage, pneumatic control malfunctions, and unplanned downtime in extreme oilfield environments.

Core Purpose: Every part is engineered as a direct, drop-in replacement built to exacting GB/T3452.1, JB/ZQ42, ZQ203-100, and Q/JC14009 standards. The product line resolves core pain points such as pressure-induced fluid leakage, premature wear of large rollers, unstable braking performance, and compromised air control, while serving as a single-source procurement benchmark and technical troubleshooting guide for on-site maintenance teams.

1.1 Product Introduction

This catalog covers all critical components for heavy-duty oilfield equipment, including standard and custom O-rings (94.62×5.33, 136×5.3, 120×3), J-sealing rings (40 JBHG4-332), high-performance R01-FG double-lipped oil seals, bimetallic bushings (GH3161-05.21), large rollers (30155438), RNA bearings (RNAV4004) per JB/T3588, BOMCO wear-resistant plates, Lanshou LS modules, and specialized mechanical seals. Sealing parts are fabricated from high-grade nitrile rubber and Teflon composites, engineered to resist mud erosion and extreme heat. Structural components utilize hardened alloy steel and precision forging. All parts are manufactured to match original equipment installation dimensions and performance parameters, ensuring zero modification on-site.

Exclusive field validation data confirms: O-rings maintain zero-leak sealing for 3600 consecutive hours under 38MPa pressure; 61964 spherical roller bearings sustain 230 tons of radial load with a service life of 4800 operating hours; R01-FG double-lipped oil seals resist mud erosion and high-temperature corrosion for 3200 hours; and bimetallic bushings reach 62 HRC surface hardness, with a service life of 3500 operating hours under continuous friction. Backed by decades of OEM supply experience and third-party ISO certification, each unit undergoes 100% dimensional verification and pressure testing before dispatch.

1.2 Function Description

High-pressure sealing assemblies (O-rings, J-sealing rings, V-rings) form a critical barrier to prevent hydraulic oil, mud, and air leakage, maintaining system pressure integrity in dynamic hydraulic circuits. Precision bearings (RNAV4004, 61964) support high-torque rotation of shafts and moving components, reducing friction and absorbing impact loads. Valves and diaphragms (GH3161-27.03.00) regulate fluid flow, enabling precise actuation of drilling mechanisms. Clutches and air control cylinders ensure safe power transmission and system shutdown. Piston rods, bushings, and clamp plates provide structural stability for hydraulic lifting equipment.

1.3 Structural Features

Sealing components feature precision-molded profiles with uniform wall thickness, ensuring high resilience and a tight seal in grooved surfaces. Bearings utilize an optimized roller-and-cage design with enhanced raceway hardness to combat fatigue. Valve bodies and connecting bolts adopt precision grinding processes for minimal clearance. Fiberglass brake linings and pressure plates provide stable friction coefficients without glazing. All parts are treated with anti-corrosion coatings to withstand salt spray and chemical erosion, maintaining performance in harsh offshore and desert environments.

2. Applicable Operating Conditions

These spare parts are designed for the most demanding oilfield drilling and workover environments, including onshore desert rigs, offshore platforms, and arctic well sites. They operate reliably in ambient temperatures ranging from -35°C to 160°C. The product line withstands continuous high-pressure hydraulic cycling (up to 40MPa), heavy mechanical vibration, mud contamination, and corrosive atmosphere, fully meeting the operational specs of XJ-450, XJ-550, DQ450DBZ, and 3NB series equipment.

We supply the following spare parts:

3. Maintenance & On-Site Engineer Practical Suggestions

3.1 Routine Maintenance Tips

Inspect all O-rings and gaskets every 60 drilling hours, replacing any that show signs of hardening or cracking to prevent catastrophic leaks. Service bearing assemblies every 1800 hours by purging old grease and replenishing with high-temperature lithium complex grease. Clean air filters monthly to prevent pressure drop in pneumatic control systems. Inspect connecting bolts for torque retention monthly, as equipment vibration can loosen fasteners.

3.2 On-Site Maintenance Avoidance Guidance

Never reuse disassembled O-rings or seals, as permanent deformation destroys their sealing performance. Always relieve system pressure before working on hydraulic cylinders or valves to avoid fluid ejection hazards. When replacing bearings, ensure perfect axial and radial alignment to prevent premature failure. Do not substitute non-standard parts; always verify part numbers against the original equipment manufacturer (OEM) specifications to maintain safety certification validity.

4. On-Site Oilfield Fault Repair Cases

4.1 Permian Basin XJ-450 Workover Rig

Equipment Model: XJ-450 Lifting Hydraulic Cylinder (E3023000054)

Operating Load: 240-ton static load

Fault Issue: Hydraulic cylinder seal (E3023000054) failure, resulting in rapid pressure drop and inability to hold the load.

Post-Repair: Installed new hydraulic cylinder seal and matching pressure ring.

Indicators: Cylinder maintains full pressure under 40MPa load for 24 hours, no pressure decay detected.

Customer Feedback: Resolved the dangerous load drop issue, eliminating the need for emergency repairs during critical well intervention operations.

4.2 Bohai Offshore Mud Pump Station

Equipment Model: 3NB-1300F Mud Pump

Operating Load: 35MPa continuous circulating pressure

Fault Issue: O-ring (136×5.3, GB3452.1) wear, causing severe mud leakage into the pump lube system.

Post-Repair: Replaced standard O-ring and installed a new mechanical seal assembly.

Indicators: Zero leakage observed, pump bearing temperature stabilized at 54°C, operational efficiency restored.

Customer Feedback: The high-quality seal eliminated contamination risks, extending the pump's maintenance interval by over 1200 hours.

4.3 Siberian Winter Drilling Site

Equipment Model: XJ-550 Main Winch

Operating Load: 200-ton dynamic load, -32°C ambient temperature

Fault Issue: Large roller (30155438) tooth breakage, causing winch jitter.

Post-Repair: Replaced the large roller and inspected the gear set.

Indicators: Winch rotation smooth, no tooth chatter detected, torque transmission stable.

Customer Feedback: The replacement roller performed flawlessly in the extreme cold, maintaining reliability during permafrost drilling operations.

5. Frequently Asked Questions (FAQ)

6. Customer Procurement Guidance

For oilfield drilling and workover operations requiring uncompromising reliability to minimize downtime and control maintenance costs, this full range of XJ-450, XJ-550, and DQ450DBZ spare parts represents the most dependable solution. With an extensive model portfolio, strict adherence to global industry standards, and field-proven durability in the harshest environments, these parts eliminate the uncertainty of mismatched or sub-standard components.

We invite you to share your specific part numbers, equipment models, and on-site operating parameters. Our team of hydraulic and mechanical engineers will provide a customized, accurate quotation, comprehensive technical documentation, and expert selection guidance. Backed by rigorous quality control and a legacy of servicing major oil and gas operators, we are committed to delivering high-performance, long-lasting spare parts that ensure the safe and efficient operation of your oilfield equipment.

contact us ：

Emeil: [email protected]  

whatsapp: +86 15275658619