BXJ Lubricated Fishing Bumper Sub and KXJ Fishing Bumper Sub

BXJ &KXJ type bumper jar (hereinafter called as bumper jar )is a mechanical jarring tool . It can make jar repeatedly the stuck drill stem to free from stuck point. When stuck drill stem can not be released by lifting and jarring, the bumper jar can be rotated to make releasable fishing tool to release fish. When used with mechanical internal cutter, it can provide an expected feeding force to the internal cutter so as to cutting steadily. When used with reversing unit , it can compensate the rising stroke for threads after reversing.

Common size OD:4-3/4",6-1/2",8".