API 7K Certified Rotary Drilling Hose with 35-75 Mpa Working Pressure and High Tensile Steel Wire Reinforcement
The Drilling Rotary Hose is a specialized high-pressure flexible connection engineered to support continuous fluid circulation within rotary drilling systems operating under severe mechanical and hydraulic conditions. Constructed using a multi-component design with wear-resistant inner tube, multiple layers of high-strength steel wire reinforcement, and protective outer cover, this hose achieves optimal balance between flexibility and structural rigidity while maintaining pressure integrity throughout extended operational cycles.
A drilling contractor engaged in an oilfield expansion program in Saudi Arabia required high-pressure rotary hose assemblies capable of supporting intensive drilling schedules across multiple land-based rigs. The operating environment presented technical challenges including elevated ambient temperatures, continuous equipment vibration, prolonged drilling cycles, and frequent pressure fluctuations.
Following implementation, the hoses demonstrated stable hydraulic performance throughout extended drilling campaigns. The reinforced structure effectively absorbed vibration-related stress while maintaining reliable sealing integrity under fluctuating pressure conditions, resulting in measurable reductions in maintenance-related downtime and improved drilling productivity.

| Name | Rotary Drilling Hose |
| Tube | Modified nitrile, black, specifically engineered for handling abrasive, corrosive substances, and oil drilling mud |
| Reinforcement | Composite construction featuring multiple layers of textile fabric and steel cable, with rubber between cable layers for enhanced performance |
| Cover | Black modified nitrile with specially engineered ultra-abrasion cover for exceptional resistance to abrasion, corrosion, cutting, gouging, oil, and weather conditions |
| Coupling | Swaged couplings, full range available including hammer union, flanges, hubs, male thread etc. |
| Certification | API 7K-0376/ISO14693 |
| Temperature | -40°C to +82°C (-104°F to +180°F) |
| Options | Accessories such as safety clamps and hose lift eyes available upon request |
| Test | Each hose tested at 22500psi for 15 minutes. Pressure test graph, test certificate and letter of conformance issued for each hose |
| Model | I.D. (inch) | I.D. (mm) | O.D. (mm) | W.P. mpa(psi) | T.P. mpa(psi) | Weight (kg/m) | B.R. (mm) |
|---|---|---|---|---|---|---|---|
| HMRDH-Grade A | 1 1/2 | 38 | 51 | 11(1500) | 22(3000) | 2.19 | 560 |
| HMRDH-Grade A | 2 | 51 | 65 | 11(1500) | 22(3000) | 3.03 | 900 |
| HMRDH-Grade A | 2 1/2 | 64 | 78 | 11(1500) | 22(3000) | 3.95 | 1200 |
| HMRDH-Grade B | 1 1/2 | 38 | 52 | 14(2000) | 28(4000) | 2.39 | 560 |
| HMRDH-Grade B | 2 | 51 | 66 | 14(2000) | 28(4000) | 3.25 | 900 |
| HMRDH-Grade B | 2 1/2 | 64 | 79 | 14(2000) | 28(4000) | 4.37 | 1200 |
| HMRDH-Grade B | 3 | 76 | 98 | 14(2000) | 28(4000) | 7.76 | 1200 |
| HMRDH-Grade B | 3 1/2 | 89 | 113 | 14(2000) | 28(4000) | 9.95 | 1300 |
| HMRDH-Grade B | 4 | 102 | 127 | 14(2000) | 28(4000) | 12.43 | 1400 |
| HMRDH-Grade B | 5 | 127 | 153 | 14(2000) | 28(4000) | 15.25 | 1500 |
| HMRDH-Grade B | 6 | 152 | 178 | 14(2000) | 28(4000) | 18.71 | 1600 |
| HMRDH-Grade C | 1 1/2 | 38 | 55 | 28(4000) | 56(8000) | 3.65 | 560 |
| HMRDH-Grade C | 2 | 51 | 69 | 28(4000) | 56(8000) | 5.15 | 900 |
| HMRDH-Grade C | 2 1/2 | 64 | 88 | 28(4000) | 56(8000) | 7.86 | 1200 |
| HMRDH-Grade C | 3 | 76 | 105 | 28(4000) | 56(8000) | 13.12 | 1200 |
| HMRDH-Grade C | 3 1/2 | 89 | 121 | 28(4000) | 56(8000) | 16.79 | 1300 |
| HMRDH-Grade C | 4 | 102 | 137 | 28(4000) | 56(8000) | 21.7 | 1400 |
| HMRDH-Grade C | 5 | 127 | 164 | 28(4000) | 56(8000) | 28.46 | 1500 |
| HMRDH-Grade C | 6 | 152 | 197 | 28(4000) | 56(8000) | 44.64 | 1600 |
| HMRDH-Grade D | 2 | 51 | 73 | 35(5000) | 70(10000) | 6.46 | 900 |
| HMRDH-Grade D | 2 1/2 | 64 | 91 | 35(5000) | 70(10000) | 10.75 | 1200 |
| HMRDH-Grade D | 3 | 76 | 107 | 35(5000) | 70(10000) | 14.35 | 1200 |
| HMRDH-Grade D | 3 1/2 | 89 | 123 | 35(5000) | 70(10000) | 18.77 | 1300 |
| HMRDH-Grade D | 4 | 102 | 139 | 35(5000) | 70(10000) | 23.16 | 1400 |
| HMRDH-Grade D | 5 | 127 | 171 | 35(5000) | 70(10000) | 38 | 1500 |
| HMRDH-Grade D | 6 | 152 | 200 | 35(5000) | 70(10000) | 48.43 | 1600 |
| HMRDH-Grade E | 2 | 51 | 80 | 52(7500) | 104(15000) | 10.37 | 1000 |
| HMRDH-Grade E | 2 1/2 | 64 | 101 | 52(7500) | 104(15000) | 17.88 | 1200 |
| HMRDH-Grade E | 3 | 76 | 120 | 52(7500) | 104(15000) | 24.45 | 1200 |
| HMRDH-Grade E | 3 1/2 | 89 | 135 | 52(7500) | 104(15000) | 29.33 | 1300 |
| HMRDH-Grade E | 4 | 102 | 148 | 52(7500) | 104(15000) | 34.24 | 1400 |
| HMRDH-Grade E | 5 | 127 | 189 | 52(7500) | 104(15000) | 55.39 | 1500 |
| HMRDH-Grade F | 2 | 51 | 82 | 70(10000) | 105(15000) | 11.81 | 1000 |
| HMRDH-Grade F | 2 1/2 | 64 | 104 | 70(10000) | 105(15000) | 20.46 | 1300 |
| HMRDH-Grade F | 3 | 76 | 129 | 70(10000) | 105(15000) | 32.74 | 1300 |
| HMRDH-Grade F | 3 1/2 | 89 | 144 | 70(10000) | 105(15000) | 39.43 | 1400 |
| HMRDH-Grade F | 4 | 102 | 158 | 70(10000) | 105(15000) | 45.73 | 1500 |
| HMRDH-Grade G | 2 | 51 | 92 | 105(15000) | 157(22500) | 17.37 | 1000 |
- Advanced Vibration Absorption Capability - Flexible elastomeric layers and strategically configured reinforcement systems dissipate vibration energy, reducing stress transfer and improving component longevity
- Optimized Internal Flow Stability - Precision-engineered inner tube maintains consistent flow passage, minimizing turbulence and pressure variation during fluid transmission
- Enhanced Sealing Reliability - Structural configuration maintains dimensional consistency under pressure loading, improving sealing performance and reducing leakage likelihood
- Broad Fluid Compatibility - Internal rubber formulation accommodates various drilling fluids commonly used in industrial drilling operations
- Oil and Gas Drilling Fluid Circulation Systems - Critical connection within drilling fluid circulation networks requiring reliable pressure management and continuous fluid transfer
- High-Dynamic Industrial Pumping Systems - Suitable for applications involving repetitive pressure fluctuation, vibration exposure, and continuous fluid movement
- Energy Infrastructure Development Projects - Supports drilling and fluid handling operations where operational reliability and hydraulic stability are critical
- Specialized Hose Engineering Knowledge - Industry experience combined with engineering-based product development for demanding industrial environments
- Customization-Oriented Manufacturing - Custom solutions covering dimensions, reinforcement configurations, pressure classes, end fittings, and material selections
- Comprehensive Quality Verification - Systematic inspection procedures, pressure verification testing, dimensional control, and finished-product performance evaluation
- Responsive Technical Support Capability - Engineering personnel provide technical consultation throughout project planning, product selection, and after-sales support
- What drilling fluids are compatible with the Drilling Rotary Hose?
The hose is compatible with a wide range of drilling fluids, including water-based mud systems and many commonly utilized industrial drilling media. Fluid compatibility should be verified for specific chemical formulations. - How does the hose perform under continuous vibration conditions?
The hose is engineered with vibration-absorbing structural elements that help reduce stress concentration and maintain operational stability during prolonged exposure to equipment-generated vibration. - Can customized connection types be supplied?
Yes. Various connection configurations, flange arrangements, and fitting specifications can be provided to ensure compatibility with existing drilling equipment. - What inspections should be performed during service?
Routine inspections should include examination of the outer cover, coupling areas, pressure performance, and any visible signs of wear, deformation, or mechanical damage. - Does the hose require special transportation procedures?
The hose should be transported using methods that prevent excessive bending, impact damage, and contamination. Proper handling helps preserve structural integrity before installation.

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