| Rotary Drilling Hose | API Specification 7K | Flexible connection between the standpipe and swivel or top drive for circulating drilling fluid. | 5,000; 7,500; 10,000; 15,000; and 20,000 psi | Approximately 2 in to 6 in | Oil-resistant synthetic-rubber tube, multiple textile or steel-wire reinforcement layers, and abrasion-resistant cover. | Flanged, union, or other drilling-service connections specified by the equipment design. | Confirm mud composition, bend radius, hose length, motion, temperature, and the required API 7K product qualification. |
| Choke and Kill Hose | API Specification 16C | High-pressure well-control lines connecting the blowout preventer system with the choke manifold or kill manifold. | 5,000; 10,000; 15,000; and 20,000 psi | Commonly about 2 in to 4 in; project requirements may differ. | Pressure-resistant elastomeric tube with high-strength wire reinforcement and an external protective cover. | API-rated flanges, hubs, or other approved well-control connections matched to the system. | Verify sour-service suitability, fluid compatibility, minimum bend radius, dynamic movement, and complete well-control-system ratings. |
| Flexible Mud-Transfer Hose | API 7K may apply when the hose is used as drilling equipment; project specification remains controlling. | Transfer of drilling mud between mud pumps, standpipe manifolds, mud tanks, and other circulation equipment. | Typically selected from 5,000 to 10,000 psi; higher ratings are available for specific systems. | Approximately 2 in to 6 in | Abrasion-resistant inner tube, textile or wire reinforcement, and heavy-duty outer cover. | Flanged or union-style ends selected for the pump and manifold layout. | Select according to fluid density, solids content, pulsation, pressure surges, and installation movement. |
| Cementing and Fracturing High-Pressure Hose | Application-specific; API 7K or API 16C applies only when the hose design and service fall within the relevant scope. | Temporary high-pressure transfer of cement slurry, fracturing fluid, or other well-service fluids. | Common project ratings include 5,000; 10,000; 15,000; and 20,000 psi. | Often about 2 in to 4 in, depending on flow-rate requirements. | Heavy-duty rubber tube with multiple reinforcement layers and a cover designed for abrasion and weather exposure. | High-pressure flanges, hammer unions, or proprietary project-approved connections. | Check slurry or chemical compatibility, erosion resistance, pressure pulsation, temperature, and service-life requirements. |
| Flexible Well-Control Jumper | API Specification 16C when designed for choke-and-kill or other covered well-control applications. | Flexible routing around subsea or surface well-control equipment where rigid piping cannot accommodate movement. | 5,000 to 20,000 psi, subject to the pressure class of the connected equipment. | Frequently about 2 in to 4 in | Reinforced elastomeric hose with high-pressure end fittings and protective external layers. | Flanged or hub-type connections compatible with the BOP, choke manifold, or riser system. | Account for cyclic bending, torsion, tension, buoyancy, installation orientation, and inspection intervals. |