User-Friendly Drilling Rig Tool High Strength Hydraulic Drilling Jar for Well Repair. Dual Cylinder Bidirectional Design: Integrates upper and lower strikes with stable delay and reliable performance. Continuous Bumper Force Adjustment: Allows free adjustment of shock force magnitude within the allowable range. High Reliability and Safety: One cylinder failure does not affect the operation of the other cylinder. Optimized Slip Design: Significantly improves working life and ensures downwards jarring reliability. Wide Application Scope: Suitable for drilling, coring, salvage, and well repair operations. Simple Operation: Requires only lifting or lowering without torque or external adjustment. Advanced Technology: Designed with advanced foreign technology for stuck tool release. ISO and API Certified: Meets strict quality standards with ISO and API certifications.