| Customization: | Available |
|---|---|
| After-sales Service: | 1 Year |
| Warranty: | 1 Year |
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(The drilling jar is a double acting jar) This drilling jar is designed to deliver hydraulic delay when jarring in the up direction, and mechanical release when jarring in the down direction. It provides excellent functional stability and strong jarring forces in both jarring direction. It is used to free stuck drill string components and is recommended for directional/deep wells drilling application.
Working principle
Up Jarring
Lower the drill stem to ensure that drilling jar is closed completely (in locking position). Up jarring is achieved by slowly increasing the lifting force on the drill stem, until there is sufficient pull force to overcome the spring resistance and initial hydraulic time delay. During the time delay, the overpull at surface can be adjusted to vary the desired impact force. When the mandrel reaches the trigger position, there is a sudden release in resistance, the elastic potential energy stored within the drill string will be transmitted to forward up jarring impact energy. After impact, apply a downward force sufficient to close jar in locking position, then repeat the jarring cycle as required.
Down Jarring
Lift and lower the drill stem to ensure that the drilling jar is closed completely (in locking position). Down Jarring is achieved by applying sufficient downward force to compress the spring and store elastic potential energy. When the pressure of the jar is greater than the desired unlocking force, the grapple will slide away from the mandrel to release the locking, performing down jarring action. Repeat the procedures to produce continuous down jarring action.
| Model | JYSZ121 | JYSZ159 | JYSZ165 | JYSZ178 | JYSZ203 | JYSZ241 |
| Product Code | 1708000 | 1710000 | 1711000 | 1713000 | 1715000 | 1717000 |
| 0.D. (mm) | 121 | 159 | 165 | 178 | 203 | 241 |
| 1.D. (mm) | 51 | 57.2 | 57.2 | 64 | 71.4 | 76.2 |
| API Connection | NC38 | NC46 | NC50 | NC50 | 65/8 REG | 75/8 REG |
| Over all Length(mm) | 4670 | 5300 | 5300 | 5880 | 5830 | 6250 |
| Total Woight (kg) | 295 | 620 | 665 | 850 | 1120 | 1770 |
| UpJarring Free Stroke(mm) | 152 | 152 | 152 | 152 | 152 | 152 |
| Down Jarring Froe Stroke (mm) | 152 | 152 | 152 | 152 | 152 | 152 |
| Max.Up Jarring Force(kN) | 350 | 700 | 700 | 800 | 1000 | 1250 |
| Max.Rated Release Force forUp Jarring (kN) | 180 | 400 | 400 | 400 | 420 | 440 |
| Rated Release Force for Down Jarring (kN) | 80 | 180 | 180 | 180 | 190 | 200 |
| Max.Tensile Load (kN) | 1600 | 3400 | 3400 | 3700 | 4400 | 5400 |
| Working Pull Force (kN) | 1100 | 2000 | 2000 | 2400 | 2800 | 3500 |
| Max Torque Load (kN ·m) | 20 | 51 | 51 | 60 | 100 | 129 |
| Working Torquo(kN-m) | 15 | 25 | 25 | 30 | 35 | 40 |
| Pump Area(cm²) | 55 | 100 | 100 | 110 | 176 | 238 |
| Length of FlexibleJoint(mm) | 3555 | 4265 | 4265 | 3710 | 3510 | 3410 |
| Total Length(mm) | 8120 | 9450 | 9450 | 9460 | 9210 | 9530 |
1. How can I place order?
A: You can contact us by email about your order details, or place order on line.
2.How do I pay?
A: After you confirm our PI, we will ask you to pay. T/T (HSBC) and PayPal, Western Union is our most commonly
used method.
3. Do you accept small orders?
A:Yes, don't be too small business. If you're a small retailer or starting a business, we'd definitely love to grow with you. We
look forward to building a long-term relationship with you.
4. Do you have any product inspection procedures?
A: 100% self-test before packaging.
5. What about the price? Can you get cheaper?
A: We always put the interests of our customers at the forefront. Prices are negotiable under different conditions and we assure you of the most competitive price.
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