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Drilling Jar
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 down. When in down hole, it can release the struck; it is a desire tool for directional well and deep well.
Working principle
●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 up forward energy and up jarring. Repeating the above several times can force tool to produce continues up jarring.
●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.
Technical Parameters -- JYSZ Double Acting Hydraulic-Mechanical Drilling Jar
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 5/8 REG |
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 |
Type available:
QYSZ Double Acting Hydraulic Drilling Jar
QJZ Mechanical Drilling Jar
JYSZ Double Acting Hydraulic-Mechanical Drilling Jar
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YJ One-Way Shock Absorber
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YSJ Type Oil Jar
CSJ Super Fishing Jar
ZJS Jar Intensifier
If you have any further requirements, please feel free to contact us by sales@sxgtpm.com
Within those famous China oil and gas drilling jar manufacturers, GAOTON is a professional such supplier, producer and provider, welcome to wholesale petroleum and oilfield API drilling jar from our factory.