Overall Working Characteristics and Operational Attributes of Workover Equipment
The workover rig is a truck-mounted mobile special-purpose service rig. Compared with drilling rigs, it features greater mobility, faster rig relocation, quicker installation, suitability for scattered well sites, more complex operating procedures, frequent start-stop, and variable operating conditions.
1. It is mainly aimed at repair operations on old wells, production wells, and problem wells, without requiring a long-term fixed well location;
2. It involves many operating procedures and frequent process switching: running/pulling tubing, well flushing, sand washing, well killing, fishing, milling, plugging, and unplugging operations alternate in sequence;
3. The equipment withstands severe impact loads, many alternating loads, low-speed heavy-load operation, and frequent braking;
4. The delivered media are complex: sewage, sand-bearing formation water, crude oil, heavy oil, chemical agents, kill fluid, and lost-circulation plugging fluid — with strong corrosiveness and sand-induced abrasiveness;
5. It operates in the open field around the clock in all weather conditions, requiring extremely high resistance to corrosion, dust, water, and both low and high temperatures.
| Workover rig model |
Working calipers (set) |
Safety calipers (set) |
Maximum Hook Load (kN) |
Working brake torque (kN·m) |
Safety braking torque (kN·m) |
| XJ250 |
2 |
1 |
675 |
61 |
28 |
| XJ350 |
2 |
1(2) |
900 |
61 |
28/56 |
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API Compliant Workover Rig Components For Reliable Well Servicing Images
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