When drilling conditions turn harsh, your equipment needs to keep up. Our API 7K Kelly Hose is engineered specifically for those high-pressure, high-stakes environments. We build it with premium materials, precision machinery, and a quality-first approach that has earned us a clean track record over the past five years.
Material and Performance Advantages
The Kelly Hose’s performance starts with its components. We don’t compromise on raw materials or design specifications.
- 316L Stainless Steel Armored Jacket – This outer layer provides excellent corrosion resistance and mechanical protection. It holds up well against impact, abrasion, and the corrosive atmosphere found on most drilling rigs.
- German-Engineered HNBR (Lanxess) – We use HNBR from Lanxess, a premium synthetic rubber known for its high tensile strength and resistance to heat, ozone, and petroleum-based fluids. It keeps the tube flexible and intact even under sustained pressure.
- Withstands 20% H₂S and 80% Oil-Based Mud – Sour service and oil-based drilling fluids are tough on standard hoses. This Kelly Hose handles both without degrading, making it a reliable choice for deep and unconventional wells.
- Zero Quality Complaints in Five Years – This isn’t just a claim; it is the result of consistent material selection, process control, and thorough testing. We track every batch, and our failure rate has remained negligible year after year.
Manufacturing Equipment and Precision Control
We back our material advantages with modern, precision-controlled production equipment.
- Mitsubishi Electronically Controlled Braiding Machines – These machines apply reinforcement layers with consistent tension and spacing. The system monitors braiding angles in real time and makes automatic corrections, so each layer meets design specifications.
- SEJIN Machinery (South Korea) – Our SEJIN braiders maintain a suspension difference of under 70 mm, well within the international standard of 120 mm. That tighter tolerance translates into better concentricity and more uniform pressure distribution across the hose wall.
- Real-Time Data Collection – Every braiding and spiraling step generates high-accuracy data. We track machine performance and product dimensions continuously, catching deviations early and preventing defects downstream.
Quality Control and Testing Protocols
Our quality control system covers incoming raw materials, work-in-progress, and finished goods.
- Advanced In-House Laboratory – We operate a fully equipped lab where we test rubber compounds, steel wire adhesion, and finished samples. Our team continuously works on new formulas to improve processing efficiency and end-product performance.
- Batch-Level Material Testing – Every shipment of raw rubber, steel wire, and textile reinforcement is sampled and tested before we release it to production. This step ensures that every hose starts with materials that meet our strict acceptance criteria.
- 100% Finished Product Inspection – No hose leaves our factory without a full visual, dimensional, and coupling integrity check. We verify the marking, length, end connections, and overall workmanship on every single unit.
- Hydrostatic Pressure Testing at 1.5× Working Pressure – Each Kelly Hose is pressure-tested to one and a half times its maximum working pressure. We retain the test graph and issue a test certificate for every hose, so you have clear documentation of its pressure integrity.
Why This Kelly Hose Belongs on Your Rig
We design this hose for long service life, predictable performance, and safety. The combination of 316L armor, Lanxess HNBR, high H₂S tolerance, and precision manufacturing makes it a dependable choice for rotary drilling, vibrator service, and mud delivery applications.
Our five-year quality record is not a coincidence. It comes from consistent investment in better machines, tighter process controls, and a quality team that treats every hose as if it were going to their own rig.
If you need a Kelly Hose that delivers documented performance and holds up under real-world drilling conditions, this is it. Contact us for a quote, detailed specifications, or a facility tour.
