Specifications

Surface Bumper Jar:
1.application:oil and water well
2.drilling jar

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)