Description:

The earth surface jars belongs to the jolt unfreezing tool and it is an effective tool canceling the pipe-sticking accident inside the drill hole. It is connected with the ground segment of drill string, the adjusting tonnage organization is shown the disc. While the earth surface jars working, it should be observed that give the stuck fish an intensive free fall. The strength of this tool jolt force could be adjusted only by using simple methods. The earth surface jars has a convenient operation and well designed and can be free fall continuously. It not only can stand heavy load and strong torque but also has a good sealing property to resist the mud circulation of high pumping pressure. This model could demonstrate the operating principle and the structure of earth surface jars, and it also train the actual functional capability of students.

Details: