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Drilling
ZJS JAR INTENSIFIER
- Type:Drilling
- CAS No:
- Qty in 20' FCL:
- Min. Order:
- Packaging:
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Parameter Model
ZJS31B
ZJS36B
ZJS42B
ZJS44B
ZJS46B
ZJS62B
ZJS64B
ZJS70B
ZJS76B
ZJS80B
ZJS90B
O.D.(mm)
79
95
108
114
121
160
165
178
197
203
229
I.D.(mm)
25.4
28
38
38
38
57
57
57
71.4
71.4
76
Overall length of pull down (mm)
2991
3110
3240
3340
3340
4500
4500
4000
4010
4010
4070
Strock(mm)
215
215
250
Connection
2 3/8REG
NC26
NC31
NC31
NC38
NC50
NC50
NC50
6 5/8REG
6 5/8REG
7 5/8REG
Max. tensile load downhole (KN)
300
550
700
800
900
1500
1500
1800
2100
2200
2500
Max. work torque
(kN.m)
3
4
6
7
8
15
15
17
20
20
22
Sealing pressure
20
20
20
20
20
20
20
20
20
20
20
Pull down Full stroke force(tf)
13-15
17-20
25-30
25-30
30-35
60-65
60-65
75-85
62-67
62-67
75-85
Weight
120kg
170kg
185kg
200kg
230kg
530kg
560kg
600kg
860kg
900kg
1030kg
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The ZJS type jar intensifier is a kind of down hole fishing jar designed to increase jarring energy to top jar .Therefore ,it must be run in conjunction with YSJ type hydraulic top jar or CSJ type super jar. Its main function is to supply acceleration to the upper end of the jar during the free jarring stroke. With a special function , the intensifier is essentially a fluid spring which not only can accelerate the top jarring action but also make the jarring action directly to strike on the fish and reduce damages to the drill tool and fishing tool.
Working principle
When it is used, the jar intensifier is connected on the top of drill collar and on the lower end of drill stem. When the fishing tool engage the fish and the drill tool is lifted up, the silicone oil in the top chamber of piston is compressed and a large number of energy in the jar intensifier will suddenly release, the energy suddenly released will provide a very large acceleration for frill collar and top jar to move upward . When the top jar reaches up to max. stroke, a strong top jarring action will impact directly on the fish, as a result, one time jarring is produced, and more times jarring will be effected by repeating this course.
