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| Brand Name: | JK |
| Model Number: | JK850 |
| MOQ: | 1 Set |
| Price: | Negotiable |
| Delivery Time: | 35-55 working days after deposit |
| Payment Terms: | T/T,L/C |
The JK850 is a heavy-duty rotary drilling rig designed for water well construction, geothermal drilling, and deep borehole engineering. Built around an 850mm through-hole rotary table, it handles drilling diameters from 105mm to 600mm with a rated depth of 850 meters.
The rig can run on either a 110KW Y315S-4 electric motor or a 1513BZLD diesel engine, depending on site power availability. Both options drive the rotary table through a four-speed gearbox delivering 40, 80, 160, and 320 r/min in forward and reverse.
Main hoist provides 80KN single-rope pull, auxiliary hoist delivers 50KN. The 47-meter mast clears 6-meter drill pipes with room for tool handling. Feed stroke is 4.5 meters.
| Model | JK850 / JKA-5-4 850/22 |
| Drilling Depth | 850 m |
| Drilling Diameter | 105 - 600 mm |
| Rotary Table Through Hole | 850 mm |
| Rotary Table Torque | 34 KN.m |
| Rotary Table Speed (Forward) | 40 / 80 / 160 / 320 r/min |
| Rotary Table Speed (Reverse) | 40 / 80 / 160 / 320 r/min |
| Main Hoist Capacity | 80 KN (single rope) |
| Auxiliary Hoist Capacity | 50 KN (single rope) |
| Mast Height | 47 m |
| Feeding Stroke | 4.5 m |
| Power - Electric Motor | Y315S-4, 110 KW |
| Power - Diesel Engine | 1513BZLD |
| Mud Pump Flow Rate | 850 L/min |
| Drill Pipe (Round) | 219 / 245 / 273 / 325 mm |
| Drill Pipe (Kelly) | 141 mm square / 89 mm hex |
| Drill Pipe Length | 3 m / 6 m |
| Base Type | Skid-mounted (crawler optional) |
| Machine Weight | 35,000 kg |
The rig ships as main components on a flatbed or in a container. Assembly on site typically takes 3-5 days with a small crew and basic lifting equipment. All critical connections use bolted joints — no site welding required. Spare wear parts (brake bands, seals, mast sheave bearings) are included in standard shipment.
