Products
JYSZ DOUBLE ACTING HYDRAULIC-MECHANICAL DRILLING JAR 02
- Type:Drilling
- CAS No:
- Qty in 20' FCL:
- Min. Order:
- Packaging:
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Model
JYSZ121
JYSZ165
JYSZ203
O.D.(mm)
121
165
203
I.D.(mm)
51.4
57
71.4
Closed length(mm)
4500
5175
5770
Upper Stroke(mm)
228
224
240
Lower Stroke(mm)
150
150
176
Connection
NC38
NC50
6 5/8REG
Max. tensile load (MN)
1.4
2.2
3.6
Max. work torque (kN.M)
13
15
20
Max. jarring lifting tons (tf)
38
72
109
Pumping area (cm2)
60
100
176
Weight
286kg
638kg
1139kg
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The drilling jar is consists of drilling up jar and drilling down jar in one body, which has stable working performance and strong jarring force both up and. When in down hole, it can release the struck; it is a desire tool for directional well and deep well
Working principle
l Up jarring
Lowering drill string to make drilling jar closed completely(in locking position), elevating drill string by the order of small tonnage to larger tonnage, which make spring and hydraulic cylinder delay, when mandrel move to a position and become release resistance, the spring force stored in drill string will transfer to upforward energy and up jarring. Repeating the above several times can force tool to produce continues up jarring.
l Down jarring
Move up and down the drill string to make drilling jar closed completely(in locking position), lowering drill string to make spring compressed and stored energy. When pressure of jar is larger than the desired lower unlocking force, grapple will slide out from mandrel to release the locking and make down jarring. Repeating the above several times can force tool to produce continues down jarring.