Specifications
DJ Surface Bumper Jar:used to free downhole stuck tools by producing downward jarring impact to stuck portion at surface
DJ Surface Bumper Jar
1.Model DJ surface bumper jar is used to free downhole stuck tools by producing downward jarring impact to the stuck portion at the surface of drilling platform, having the advantages of powerful jarring impact,reliable tonnage-adjusting and convenient utilization.
2.It is especially effective for freeing key seat,tight-hole or sticky stuck tools.
O.D. mm (in) | 121(4 3/4) | 178 (7) |
Stroke mm (in) | 1500 (59) | 1220 (48) |
I.D. mm (in) | 32(1 1/4) | 51(2) |
Connection | NC38 (3 1/2 IF) | NC50 (4 1/2 IF) |
Closed Length mm (in) | 3155 (124.2) | 3090 (121.8) |
