CSJ SUPER FISHING JAR
CSJ SUPER JAR
TIANHE-DJ-CSJ
CSJ type super fishing jar is a fishing tool that provides larger jarring force when compared with others of the same specifications. This jar’s structure is compact, performance is reliable and is easy to adjust and operate under different drilling conditions. The CSJ type super jar is a new type of top jarring tool used in oilfield, geological exploration and drilling operation.
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CSJ SUPER FISHING JAR: Product Overview

The CSJ SUPER FISHING JAR is a hydraulic tool that delivers powerful upward jarring forces to free stuck drill strings. This super fishing jar operates through a precise hydraulic mechanism that ensures reliable performance in demanding downhole conditions.

Working Principle
The super fishing jar functions through a three-stage hydraulic process. When tension is applied, the tool's tapered piston creates damping resistance, allowing the drill string to store elastic energy. Once the piston reaches the release point, pressurized hydraulic oil instantly unloads, generating a strong upward impact. The super fishing jar then easily resets for repeated jarring cycles, while its spline design maintains torque transmission and mud circulation throughout the operation.

Key Applications

  • Fishing operations in vertical, directional, and horizontal wells

  • Combined use with accelerators to enhance impact force

  • High-pressure and high-temperature drilling environments

  • Preventive placement in drilling assemblies for stuck pipe incidents

Product Features

  • The super fishing jar provides adjustable jarring force for different well conditions

  • The super fishing jar maintains full torque transmission and mud circulation capability

  • The super fishing jar features robust construction for long service life and reliable performance

  • The super fishing jar offers simple reset functionality for consecutive jarring actions

This super fishing jar represents an essential solution for modern fishing operations, delivering controlled impact forces to effectively resolve stuck pipe situations while ensuring operational safety and efficiency.