Specifications

hydraulic drilling jar:
It integrates the up jarring with the down jarring

 hydraulic drilling jar

 

1.It belongs to the integral drilling jar. Up jar is designed on hydromechanical principle and has different tonnages by changing the raising speed.

2.The action of down jarring is just as a free falling body and the jarring impact is based on the drilling tool’s weight above the drilling jar.

 

Model	O.D. mm	I.D.mm	Connection api	Closed overall length mm	Working torque kn·m	Max.tensile load MN	Max. jar load MN
JSZ121	121	50	NC38	5757	13	1400	300
JSZ159	159	57	NC50	6435	15	2000	700
JSZ178	178	60	NC50	6425	15	2000	700
JSZ203	203	70	6 5/8REG	6646	18	2300	800