The drilling jar is a new kind of tool used for block release, it stuck, it is released through a heavy up or down jarring on the right place.

YJ-A Drilling Jar (hydraulic/mechanical) is also an up and down jarring that is desged as an assembly. The jar was developed to overcome the shortmings associated with purely hydraulic or mechanical jars, yet retain the advantages of both concepts. Less restricted jar placement (in tension, neutral or compression ) in the BHA. It characters that the release forces in jarring up or down can be adjusted on the rig on the rig site and its adjusting operation is very simple, exact and stable. It is a new advanced jar.

Copyright © 2002 Changcha Pumps & Systems. All Rights Reserved.

All catalogs are in PDF format, and require Acrobat reader.