Hydraulic fishing jar is a fishing tool which the jarring force is larger than other jar with same specifications. It features a closed structure, reliable performance, easy to adjust and easy to operate. It is a new type of top jarring tool used in oilfield, geological exploration and drilling operation.Working Principle The hydraulic shock absorber is connected between drill bit and drill collar, the torque is transferred from top drill string to mandrel. The spline transfers torque to spline outer barrel, oil cylinder and lower sub, then drive drill bit to rotate.
A fishing jar is an essential tool in drilling and oilfield operations. Designed according to API Spec 7-1, it is used to deliver strong jarring force to free stuck tools, improve downhole operations, and enhance efficiency. The hydraulic fishing jar is an advanced tool known for its exceptional force and reliability. It is anti-torque and compatible with motors, featuring a compact structure, reduced downhole wear, and the ability to switch between up and down jarring functions by modifying its components.
Our company specializes in oilfield equipment, drilling tools, and energy-efficient solutions. With years of expertise in global distribution, we focus on providing high-performance tools that meet the strictest industry standards.
Available in different sizes and specifications.
Custom configurations based on client requirements.
Special coatings for enhanced durability in extreme environments.
High Efficiency: Superior jarring force enhances drilling success rates.
Durability: Made from high-grade materials for extended service life.
Compact Design: Reduces space requirements and eases handling.
Vibration Reduction: Protects drill bits and prevents excessive wear.
User-Friendly Operation: Simple adjustments and maintenance.
Premium Quality Materials – Built with high-strength alloys for long-lasting performance.
Innovative Engineering – Advanced design for better operational results.
Competitive Pricing – Affordable without compromising quality.
Worldwide Shipping – Fast delivery to international locations.
Excellent Customer Support – Technical assistance available 24/7
A Fishing Jar is an essential component in oil and gas drilling operations. It is used to deliver a powerful impact force to free stuck tools in the wellbore. Unlike conventional jars, the hydraulic fishing jar provides a greater jarring force while maintaining a reliable and adjustable performance.
The hydraulic fishing jar operates through a hydraulic shock absorber, which is placed between the drill bit and the drill collar. It transmits torque from the drill string to the mandrel, which then transfers torque to the spline outer barrel, oil cylinder, and lower sub to drive the drill bit’s rotation.
During drilling operations, uneven wellbore conditions and cone bit structures create significant vibrations. The hydraulic fishing jar absorbs these vibrations through compressed liquid deformation, reducing the impact load on drill tools. This function protects the drill bit and other downhole equipment, ensuring smoother and more efficient drilling.
| Specification | CSJ31B | CSJ34B | CSJ36B | CSJ42C | CSJ46B | CSJ62B | CSJ64B | CSJ70B | CSJ76B | CSJ80B | CSJ90B |
|---|---|---|---|---|---|---|---|---|---|---|---|
| O.D. (mm) | 80 | 89 | 95 | 108 | 121 | 160 | 165 | 178 | 197 | 203 | 229 |
| I.D. (mm) | 25.4 | 25.4 | 28 | 38 | 45 | 57 | 57 | 60 | 71 | 71 | 76 |
| Stroke (mm) | 298 | 298 | 298 | 305 | 305 | 320 | 320 | 320 | 330 | 330 | 330 |
| Tensile Load (KN) | 300 | 400 | 500 | 700 | 980 | 1270 | 1370 | 1570 | 1870 | 2100 | 2200 |
| Max. Tension Down-hole (KN) | 150 | 180 | 200 | 250 | 400 | 700 | 750 | 800 | 800 | 800 | 1000 |
| Max. Work Torque (KN·m) | 3 | 3.5 | 4 | 6 | 8 | 15 | 15 | 17 | 20 | 22 | 25 |
| Max. Working Temperature (°C) | 150 | ||||||||||
| Sealing Pressure (MPa) | 3 | ||||||||||
| Thread Type | 2 3/8 REG, NC26, NC31, NC38, NC50, 6 5/8 REG, 7 5/8 REG |
API Spec 7-1 Compliant: Meets international industry standards for durability and reliability.
Short Length & Small Diameter: Reduces wear and increases operational efficiency.
Anti-Torque Design: Works seamlessly with motors for smooth operations.
Interchangeable Components: The same tool can switch between upward and downward jarring directions.
Hydraulic Shock Absorption: Minimizes vibrations, reducing damage to drill tools.
High Jarring Force: Provides greater impact than conventional jars of similar size.
Easy Adjustment & Operation: Simple configuration for optimal performance.
Secure packaging to prevent transit damage.
Available for air, sea, and land transportation.
Custom packaging available upon request.
A fishing jar is used to free stuck tools or debris from a wellbore by applying impact force.
It uses hydraulic pressure to generate a powerful jarring force, helping remove obstructions in drilling operations.
Yes, the anti-torque design allows it to be used with motors effectively.
The fishing jar can operate at temperatures up to 150°C.
Yes, our company offers customization based on your operational needs.
We provide:
Technical Consultation: Expert guidance on selecting the right fishing jar.
After-Sales Support: Quick response to service inquiries.
Training Programs: Operational training for optimal performance.
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