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Drilling
DJ SURFACE BUMPER JAR
- Type:Drilling
- CAS No:
- Qty in 20' FCL:
- Min. Order:
- Packaging:
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Parameter/Model
DJ46B(4 3/4”)
DJ70B(7”)
DJ80B
O.D.(mm)
121(4 3/4”)
178(7”)
203
Max. Jarring force(tf)
0.4(41±5)
0.68 (70±5)
0.68 (70±5)
Max. Tension Load(tf)
1.2(122.00)
1.5(153.00)
2.1(214.30)
Sealing Pressure(kgf/cm2)
20(196)
20(196)
20(196)
Stroke(mm)
1500 (≈59″)
1220 (≈48″)
2000 (≈78.75″)
I.D.(mm)
30 (1 3/16”)
47 (1 7/8”)
50
Connection
NC38(3 1/2”IF)
NC50(4 1/2”)
NC50
Closed Length(mm)
3095(121.85)
3090(121.8”)
3890
Orginal releasing force
15
20
20
Weight
170kg
450kg
730kg
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The surface jar is an effective tool for resolving the problem of drill tool stuck in down hole. It is connected with the surface section of drill string, the device to adjust the tonnage shall protrude from the rotary disc face, the violent down jarring to the stuck catch can be clearly seen when the surface jar makes jarring operation. The jarring strength for the tool can be easily adjusted and it is an easy operated, unique designed tool which can make continuous down jarring. The surface jar, which not only can bear heavy load and strong torque but also owns a good sealing property and can withstand the mud circulation with high pump pressure, has proven to be a safe, successfully effective releasing tool through many years using.
