Overview
The XJ250 Workover Rig is a heavy-duty mobile unit engineered for servicing and repairing oil wells. It combines a telescopic derrick, hydraulic power system, and integrated controls to perform tasks like pulling tubing, replacing downhole equipment, and wellbore cleaning. Designed for onshore operations, it meets API and regional safety standards. Its modular design allows customization for specific well conditions, making it a versatile asset for oilfield service companies.
Structure and Working Principle
The rig comprises a carrier truck, derrick (typically 18–25m), drawworks, hydraulic power pack, and control cabin. The derrick’s telescopic design enables compact transport and quick setup. During operation, the drawworks spool manipulates drill pipes or tools via a traveling block system. Hydraulic cylinders provide precise positioning, while the control system monitors load and pressure in real time. The rig’s 250-ton hook load capacity handles most workover scenarios in medium-depth wells.
Key Features
1. **High Load Capacity**: Handles strings up to 7,000m in wells with ≤250-ton workloads. 2. **Mobility**: Mounted on a heavy-duty truck chassis for rapid deployment between sites. 3. **Safety Systems**: Includes anti-drop mechanisms, overload alarms, and emergency brakes. Automated pipe handling reduces manual labor, while corrosion-resistant materials extend service life in saline or H2S environments. Optional features like winterization kits adapt to Arctic conditions.
Application Areas
Primarily used in: - **Workover Operations**: Replacing pumps, repairing casings, or clearing obstructions. - **Well Stimulation**: Facilitating acidizing or fracturing jobs. - **Abandonment**: Plugging depleted wells. The XJ250 suits onshore fields with well depths of 3,000–5,000m. Its compact footprint is ideal for congested oilfields or environmentally sensitive areas where larger rigs are impractical.
Maintenance and Precautions
**Daily Checks**: Inspect wire ropes, hydraulic leaks, and structural integrity. Lubricate moving parts per manufacturer guidelines. **Major Maintenance**: Overhaul the drawworks and hydraulic system every 2–3 years. Replace critical load-bearing components after 5 years or 10,000 operating hours. Operators must undergo API-approved training to prevent accidents. Avoid exceeding rated loads or operating in winds >45 km/h. Store the rig with the derrick lowered to minimize weather exposure.
B2B Procurement Guide
1. **Supplier Evaluation**: Prioritize manufacturers with ISO 9001/API Q1 certification and field-proven designs. 2. **Configuration**: Specify well depth, climate requirements, and ancillary tools (e.g., blowout preventers). 3. **Logistics**: Verify road transport permits for oversized loads. Lead times typically range 3–6 months. Consider bundled service contracts for maintenance. Used units (3–5 years old) may cost 40–60% less but require thorough inspection.
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