Product Introduction
This comprehensive DQ70 top drive parts collection covers all essential consumables, structural assemblies, and hydraulic components for routine maintenance, full system overhauls, and emergency field repairs. Included are brake & fan assemblies, valve blocks, precision sealing rings (O-rings, U-rings), high-performance SKF cylindrical roller bearings, gear pumps, hydraulic hoses, filters, sensors, and 350-ton capacity strops—all manufactured to strict quality control standards. OEM-matched part numbers ensure easy cross-referencing and inventory management, eliminating the risk of ordering incorrect components for the DQ70 and DQ70BSC systems.
Functional Capabilities
- Hydraulic Sealing & Leak Prevention: High-precision O-rings, U-rings, and barrel seals maintain pressure integrity up to 21MPa, stopping hydraulic fluid leakage and pressure drops that disrupt drilling operations
- Power Transmission & Bearing Support: Premium SKF cylindrical roller bearings reduce friction, absorb radial/axial loads, and extend the service life of the driven shaft and rotating components
- Braking & Cooling Control: Brake brackets, fan assemblies, and cooling devices stabilize top drive temperature and deliver reliable emergency braking for safe rig operations
- Hydraulic System Stability: Gear pumps, oil filters, filter elements, and main valve sets keep hydraulic fluid clean and circulating, protecting the DQ70BSC hydraulic station from wear and contamination
- Lifting & Connection Safety: 350-ton capacity strops and valve block assemblies ensure secure load handling and fluid control during drilling and tripping operations
Structural Design Features
- High-grade nitrile rubber seals with oil/mud resistance, rated for 8,000+ operating hours before replacement
- Forged steel brake brackets and valve blocks with tensile strength ≥800MPa, resisting deformation under heavy loads
- Imported SKF precision bearings with C3 clearance and bronze separators, optimized for high-speed, heavy-load rotation
- Modular, drop-in assembly design for quick field installation, cutting repair labor time by up to 45%
- Standardized hydraulic connections and sizing, fully compatible with DQ70 top drive and DQ70BSC hydraulic station interfaces
Applicable Operating Conditions
These DQ70 top drive parts are designed for heavy-duty drilling scenarios including onshore deep well drilling, offshore platform operations, directional drilling, and horizontal well construction. They perform reliably in extreme temperatures, high-humidity marine environments, and high-pressure hydraulic systems (21MPa rated pressure), compatible with all standard hydraulic oils and drilling fluids. All components meet global drilling equipment safety standards, making them suitable for both inland and offshore rigs using Jinghong DQ70 top drive systems.
Maintenance & Service Recommendations
- Seal Inspection: Check all O-rings, U-rings, and barrel seals every 500 operating hours for cracks, wear, or deformation; replace immediately if damage is found
- Bearing Lubrication: Regrease SKF bearings every 1,000 hours with high-temperature lithium grease to prevent dry friction and premature failure
- Filter Replacement: Change oil filters and filter elements every 600 hours to keep hydraulic fluid clean and avoid system contamination
- Brake System Check: Inspect brake pads, fan assemblies, and brackets every 800 hours to ensure efficient cooling and reliable braking performance
- Storage Guidelines: Store seals and bearings in a dry, dust-free environment; avoid direct sunlight to prevent rubber hardening and bearing corrosion
We supply the following spare parts:
| Top drive system DQ70 | ||
| Power swivel DQ70-D-03 top drive DQ70 (indivisible) | ||
| Brake and fan | 700110200 | set |
| Ball valve block DQ70-DZ-02 (indivisible) | Т75020208 | set |
| O-ring | М01120057 (model Ø120х5.7) | pcs |
| Sealing side ring of socket | Т75020210 (model Ø120) | pcs |
| O-ring | М01056031 (model Ø56х3.7) | pcs |
| O-ring | М01045031 (model Ø45х3.1) | pcs |
| U-ring | М04120 | pcs |
| Sealing side ring of movable seat | Т75020217 | pcs |
| O-ring | М01096057 (model Ø96х5.7) | pcs |
| Brake bracket DQ70-SC-02 (indivisible) | ||
| Fan assembly (indivisible) | DQ70-SC-01 | set |
| Brake and cooling devices | DQ70 | set |
| Upper spring-loaded barrel seal | 210х250х15 004/1 | pcs |
| gear pump | А37F/R 01H-S-K-32, 21 MPa | pcs |
| Barrel, bearing (lower), outer race, roller-cylindrical | SKF 244СС ÇINA 053 КВЗК 00007 | pcs |
| Barrel bearing (lower) inner race | SKF 244ЕСМА/С3 Germany 134H | pcs |
| Driven shaft upper bearing, single, bronze separator, roller cylindrical | SKF 2220 Germany 025JSKF | pcs |
| Driven shaft lower bearing | SKF 24122СС/С3W33 Sweden 268E | pcs |
| Top drive system DQ70BSC | ||
| Hydraulic station DQ70BSC (indivisible) | set | |
| Hose oil | 9702010015 | set |
| Oil filter | 5126001900 | pcs |
| Filter element | 5126990303 | pcs |
| Level thermometer | 3804000042 | pcs |
| temperature sensor | 3808000072 | pcs |
| Engine pump oil composition | 9702022100 | pcs |
| Set of main valves | 9702010004 | pcs |
| Cylinder DQ70BSC | 970522720 | set |
| Strop 3 ½ “350tn DQ70BSC | Upper eye 127mm, lower eye 69.9mm, lifting capacity 350t | set |
On-Site Fault Repair Case Studies for DQ70 Top Drive
Case 1: Hydraulic Leakage from Worn Barrel Seals
An onshore deep well rig experienced severe hydraulic fluid leakage from the DQ70 top drive’s upper spring-loaded barrel seal, causing pressure loss and operational delays. Technicians replaced the worn seals with genuine DQ70-spec barrel seals, reseated the assembly, and restored full hydraulic pressure within 2 hours, avoiding a 2-day rig shutdown. Root cause: prolonged high-pressure operation accelerated seal wear.
Case 2: Driven shaft Vibration Due to Failed SKF Bearing
An offshore drilling platform reported excessive vibration and noise from the DQ70 top drive’s driven shaft, traced to a damaged lower SKF cylindrical roller bearing. The faulty bearing was replaced with a matching SKF 24122СС/С3W33 unit, shaft alignment was verified, and normal operation resumed in 90 minutes. Root cause: contamination ingress and lack of routine lubrication.
Case 3: Hydraulic Station Overheating from Clogged Filter
A directional drilling project faced DQ70BSC hydraulic station overheating and reduced pump output, caused by a clogged oil filter element. Replacement filters and elements were installed, flushing the hydraulic system to remove debris, and the station returned to stable operating temperatures within 1 hour. Root cause: delayed filter replacement leading to fluid contamination.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible only with Jinghong DQ70 and DQ70BSC top drive systems? | Yes, every part is precision-designed and tested exclusively for the Jinghong DQ70 top drive (including DQ70-D-03 power swivel) and DQ70BSC hydraulic station, ensuring perfect fitment and performance. |
| What is the pressure rating of the hydraulic seals and gear pumps? | All hydraulic seals are rated for 21MPa operating pressure, matching the A37F/R gear pump’s 21MPa rating, fully compliant with the DQ70 top drive’s hydraulic system requirements. |
| Can these parts be used for both routine maintenance and emergency repairs? | Absolutely. This list includes routine consumables (seals, filters) and critical structural components (bearings, brake assemblies) for scheduled upkeep and urgent field breakdown fixes. |
Procurement Guidance & Value Summary
This Jinghong DQ70 top drive parts catalog is a dual-purpose resource: it sets a clear procurement standard to ensure you source only high-quality, compatible components, and provides technical guidance to resolve common DQ70 top drive failures efficiently. By choosing these precision-matched parts, you eliminate the risks of generic components—including frequent breakdowns, extended downtime, and safety hazards—while maximizing the service life and operational stability of your DQ70 top drive system. Every component undergoes strict quality testing, delivering reliable performance for all drilling operations.
