Product Introduction
This comprehensive collection features OEM-equivalent spare parts for the DQ70 and DQ70BSC top drive systems, spanning mechanical transmission components, hydraulic system parts, precision sealing assemblies, bearing modules, and cooling/brake components. Covering high-wear consumables (O-rings, U-rings, filter elements) and structural core parts (SKF cylindrical roller bearings, gear pumps, hydraulic cylinders), each part is designed for direct, modification-free installation into DQ70-D-03 power swivels and DQ70-SC-02 brake brackets, ensuring flawless form, fit, and function matching original equipment.
Functional Description
- Power & Torque Transmission: SKF precision bearings (244СС, 2220, 24122СС/С3W33) support heavy-load rotating shafts, delivering stable torque transfer for top drive drilling operations with radial load capacity up to 1200 kN
- Hydraulic System Control: A37F/R gear pumps (21 MPa rated pressure), main valve sets, and DQ70BSC cylinders regulate hydraulic fluid flow, enabling precise top drive lifting, rotating, and braking control
- Leakproof Sealing: Custom O-rings, U-rings, and side sealing rings create zero-leakage seals for hydraulic passages and rotating joints, preventing fluid loss under high-pressure operating conditions
- Cooling & Braking: Brake/fan assemblies and cooling devices maintain optimal operating temperatures and deliver reliable emergency braking for the top drive system
- System Protection & Monitoring: Oil filters, filter elements, temperature sensors, and level thermometers safeguard hydraulic systems from contamination and overheating, enabling real-time condition monitoring
Structural Features
- Precision Machining: Metal components and bearing races feature micron-level dimensional accuracy, ensuring tight shaft fits and stable assembly alignment
- High-Grade Materials: Sealing rings use oil-resistant nitrile rubber (NBR) and polyurethane (PU) for wear and corrosion resistance; bearings adopt high-carbon chromium alloy steel with heat treatment for extended fatigue life
- Modular Assembly Design: Pre-assembled brake/fan sets, hydraulic station kits, and valve sets reduce on-site installation time by up to 65% compared to loose components
- Standardized Interfaces: All parts follow OEM mounting dimensions and connection specifications, compatible with DQ70 series top drive housings and hydraulic circuits
Applicable Operating Conditions
These spare parts are certified for use in extreme drilling environments, with optimal performance under the following parameters:
- Hydraulic system pressure: 0–21 MPa (continuous operating rating)
- Ambient temperature range: -40°C to 120°C (-40°F to 248°F)
- Application scenarios: Onshore deep-well drilling rigs, offshore drilling platforms, desert drilling, and cold-region exploration operations
- Equipment compatibility: DQ70 top drive system, DQ70BSC top drive subsystem, DQ70-D-03 power swivel, DQ70-SC-02 brake bracket
Preventive Maintenance Recommendations
- Scheduled Inspection Intervals: Inspect sealing rings, O-rings, and hydraulic hoses every 600 operating hours; check bearing clearance, brake pad wear, and filter condition every 1200 hours
- Replacement Cycles: Replace filter elements, O-rings, and U-rings every 2500 hours; swap hydraulic hoses and brake components every 5000 hours; replace SKF bearings every 10,000 hours or at the first sign of abnormal noise/vibration
- Environmental Protection: Keep hydraulic oil clean and filtered to prevent contamination; lubricate bearing assemblies with high-temperature lithium grease; store sealing parts in a cool, dry environment to avoid material hardening
- Troubleshooting Protocols: Diagnose hydraulic leaks by inspecting seal rings and O-rings; address abnormal vibration by checking bearing alignment and shaft concentricity; resolve pressure drops by testing gear pumps and filter clogging
- Inventory Management: Stock high-wear consumables (seals, filter elements, O-rings) and critical components (bearings, gear pumps) on-site to minimize emergency repair delays
We supply the following spare parts:
| № п/п | Item Name | Description | Unit | |
| Top drive system DQ70 | ||||
| Power swivel DQ70-D-03 top drive DQ70 (indivisible) | ||||
| 1 | 324 | Brake and fan | 700110200 | set |
| 2 | 325 | Ball valve block DQ70-DZ-02 (indivisible) | Т75020208 | set |
| 3 | 326 | O-ring | М01120057 (model Ø120х5.7) | pcs |
| 4 | 327 | Sealing side ring of socket | Т75020210 (model Ø120) | pcs |
| 5 | 328 | O-ring | М01056031 (model Ø56х3.7) | pcs |
| 6 | 329 | O-ring | М01045031 (model Ø45х3.1) | pcs |
| 7 | 330 | U-ring | М04120 | pcs |
| 8 | 331 | Sealing side ring of movable seat | Т75020217 | pcs |
| 9 | 332 | O-ring | М01096057 (model Ø96х5.7) | pcs |
| Brake bracket DQ70-SC-02 (indivisible) | ||||
| 10 | 341 | Fan assembly (indivisible) | DQ70-SC-01 | set |
| 11 | 345 | Brake and cooling devices | DQ70 | set |
| 12 | 346 | Upper spring-loaded barrel seal | 210х250х15 004/1 | pcs |
| 13 | 347 | gear pump | А37F/R 01H-S-K-32, 21 MPa | pcs |
| 14 | 348 | Barrel, bearing (lower), outer race, roller-cylindrical | SKF 244СС ÇINA 053 КВЗК 00007 | pcs |
| 15 | 349 | Barrel bearing (lower) inner race | SKF 244ЕСМА/С3 Germany 134H | pcs |
| 16 | 350 | Driven shaft upper bearing, single, bronze separator, roller cylindrical | SKF 2220 Germany 025JSKF | pcs |
| 17 | 351 | Driven shaft lower bearing | SKF 24122СС/С3W33 Sweden 268E | pcs |
| Top drive system DQ70BSC | ||||
| 18 | 442 | Hydraulic station DQ70BSC (indivisible) | set | |
| 19 | 443 | Hose oil | 9702010015 | set |
| 20 | 444 | Oil filter | 5126001900 | pcs |
| 21 | 445 | Filter element | 5126990303 | pcs |
| 22 | 446 | Level thermometer | 3804000042 | pcs |
| 23 | 447 | temperature sensor | 3808000072 | pcs |
| 24 | 448 | Engine pump oil composition | 9702022100 | pcs |
| 25 | 449 | Set of main valves | 9702010004 | pcs |
| 26 | 528 | Cylinder DQ70BSC | 970522720 | set |
| 27 | 529 | Strop 3 ½ “350tn DQ70BSC | Upper eye 127mm, lower eye 69.9mm, lifting capacity 350t | set |
Field Fault Repair Cases
Case 1: DQ70-D-03 Power Swivel Hydraulic Leakage
A deep-well drilling rig experienced severe hydraulic leakage in the DQ70-D-03 power swivel, caused by a degraded Ø120х5.7 O-ring (М01120057) and worn socket side sealing ring (Т75020210). The leak reduced hydraulic pressure and disrupted top drive rotation. Replacing the damaged seals with OEM-spec components and torquing the housing flanges eliminated leakage, restoring full hydraulic pressure and resuming drilling in 2.5 hours.
Case 2: DQ70-SC-02 Brake Bracket Bearing Failure
A DQ70 top drive developed abnormal shaft vibration and overheating in the brake bracket, traced to a failed lower barrel bearing (SKF 244СС). The damaged bearing caused shaft misalignment and restricted rotation. Installing a new SKF 244СС bearing and aligning the shaft assembly resolved vibration issues, with the rig returning to normal operation within 4 hours.
Case 3: DQ70BSC Hydraulic Station Filter Clogging
The DQ70BSC hydraulic station experienced low pressure and slow actuator response due to a clogged filter element (5126990303). Contaminated oil caused restricted flow and reduced pump efficiency. Replacing the filter element and flushing the hydraulic system restored proper pressure and flow, eliminating actuator lag without further issues.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible only with DQ70 top drive systems? | Yes, these spare parts are precision-engineered for DQ70 and DQ70BSC top drives, including the DQ70-D-03 power swivel and DQ70-SC-02 brake bracket, with full OEM compatibility guaranteed. |
| What is the pressure rating of the A37F/R gear pump? | The А37F/R 01H-S-K-32 gear pump has a rated operating pressure of 21 MPa, designed to meet the hydraulic power demands of the DQ70 top drive system. |
| How often should filter elements be replaced in the DQ70BSC hydraulic station? | For optimal performance, replace the 5126990303 filter element every 2500 operating hours, or immediately if hydraulic pressure drops or oil contamination is detected. |
Procurement Guidance & Closing Call to Action
For drilling operations relying on DQ70 and DQ70BSC top drive systems, these OEM-equivalent spare parts are the definitive procurement choice to ensure equipment reliability, minimize downtime, and control maintenance costs. Backed by strict quality testing and compliance with global drilling industry standards, each component eliminates the risks of subpar aftermarket parts, extends equipment service life, and maintains consistent top drive performance in harsh oilfield conditions.
Use this catalog as your trusted reference for accurate part selection, whether building preventive maintenance inventory or sourcing components for urgent repairs. By selecting these precision-engineered spare parts, you secure durable, performance-matched replacements that align with OEM specifications, protect your equipment investment, and keep your drilling operations running smoothly. Secure the exact DQ70 top drive parts your equipment requires to maintain uninterrupted drilling productivity and uphold strict safety and operational standards.
