The CSJ type super fishing jar is an upward jarring tool adopting the combination of machinery and hydraulic pressure, through alternating motion generated by cone piston within hydraulic pressure. It is far stronger than those with same specifications in oil, geological drilling, and exploration assignments. It is compact in structure, stable in performance, easy to use.
Construction
The CSJ type super fishing jar is made of three parts. The first part consists of top sub, mandrel, flushing. The second part includes mandrel body, spline body, connect body, pressure body and flushing body. The third part consists of cone piston, by-pass body, sealing body. The thread of the Jar's upper and lower sub can connect with relative drill tools designed and produced based on the special drill pipe thread in the oil. The connection between the mandrel and spline body will pass on rotating torque, and have the jar connected with not only the fish or the thread of other subs, but also another fishing tool so as to retrieve the fish without thread.


