Hardrock ST350 truck mounted service rig is mobile platform mounted with high quality oil and gas repairing equipment.
ST350 work-over rig has the lifting load capacity 900KN and mast length 31.7m. It is most popular service rig for medium well.
It is most compact design among all the work-over rig, ST350 can be mounted in 6×4 truck chassis and Cat C11 engine to get the best driving and operation flexibility.
8×4 and 8×8 chassis with different brand engine like Cummins, Weicha are available as options.
Hardrock ST350 service rig cover most of application for medium size oil and gas well work-over activity.
| Main Spec.|| Value|
| Model|| ST350|
| Nominal minor repair depth (27/8″EUE tubing)|| m|| 4000|
| Nominal heavy repair depth (27/8″ Drill Pipe)|| m|| 3200|
| Max. hook load|| Kn|| 900|
| Rated hook load|| Kn|| 600|
| Engine model|| C11|
| Engine power|| HP|| 385|
| Hydraulic transmission case model|| Customized|
| Transmission type of hydraulic workover rig|| Hydraulic + Mechanical|
| Qty. of traveling system ropes|| 4×3|
| Mast|| m|| 31.7|
| Main rope diameter|| mm|| 26|
| Single line pull force|| T|
| Hook speed|| m/s|| 1.4|
| Approach / departure angle|| 23°/16°|
| Sand Winch Rope|| mm|| 16/22|
| Single line pull force|| T|| 13.5/16|
| Min. ground clearance|| mm|| 311|
| Max. Gradeability of truck mounted workover unit|| 0.26|
| Min. turning diameter|| m|| 28|
| Hook block model|| YG90|
| Swivel model|| TC90|
| Overall dimension|| m|| 16.7 × 2.8 × 4.1|
| Chassis drive form|| 6 x 4/8 x 4|
| Main unit mass|| kg|| 44000|