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| After-sales Service: | 2 Year |
| Warranty: | 2 Year |
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Hydraulic drilling jars are masterpieces of mechanical design, with two pistons ingeniously separated by a valve. When you apply tension or compression to the armed hydraulic jar, the fluid within one piston is expertly compressed and directed to the other piston, overcoming high flow resistance. This mechanism controls the arming time - higher pulling or pushing forces lead to shorter arming durations. The distance traversed is known as the stroke; when this stroke reaches a critical point, the compressed fluid is rapidly released via a bypass valve, propelling the fluid to the second piston and equalizing pressure almost instantaneously. The greater the applied force, the more compressed the fluid, resulting in a shorter arming time and a more potent jarring force.
In scenarios where the drill string becomes lodged at the bottom during drilling or if unexpected twist-offs occur, our jar provides a powerful upward motion to release it. Should the pipe become ensnared off-bottom in key seats or due to other impediments, you can rely on downward jarring to free it. Post-release, upward reaming methods can be employed to safely recover the entire drill string, ensuring operational continuity.
Encountering differential sticking can pose a significant challenge, necessitating the movement of the jammed pipe to resume rotation and circulation. Our jars are adept at performing their task without disturbing the drillstring's directional orientation, proving to be invaluable, neutral tools for downhole motor directional drilling and precision directional jetting.
Beyond traditional applications, jars are indispensable in fishing and cutting jobs, as well as in drilling and production tools, cementing, and coring operations. They rise to the occasion across multiple downhole operations, delivering versatile functionality and unmatched performance.
The Full Hydraulic Drilling Jar Type QY is a marvel of modern engineering, showcasing a needle valve type structure that allows for both upward and downward impacts to be executed hydraulically. This advanced system facilitates stepless adjustment of up and down tonnage, effectively safeguarding the drill string and extending its service life. With a patented hydraulic energy storage mechanism, it offers outstanding stability, a delay time range from 30 seconds to 240 seconds, and operates efficiently across temperatures from -40ºC to 180ºC. Crafted from innovative special materials, this high-performance and safety-conscientious tool is extensively utilized in drilling, coring, workover, fishing, and more.
| Model | Tool OD mm (in) |
ID of Bore mm (in) |
Connection API |
Allowable Working Tensile kN(Ib) |
Allowable Working Torque kN· m(lb· ft) |
Max. Up Jarring kN(Ib) |
Max. Down Jarring kN(Ib) |
Up Stroke mm |
Down Stroke mm |
Open Length mm |
| QY108 | 108 (4 1/4) |
38 (1 1/2) |
NC31 | 800 (180000) |
10 (7000) |
250 (55000) |
120 (26000) |
152 | 152 | 5835 |
| QY121 | 121 (4 3/4) |
50 (2) |
NC38 | 1100 (250000) |
15 (11000) |
350 (78000) |
180 (40000) |
152 | 152 | 5768 |
| QY127 | 127 (5) |
50 (2) |
NC38 | 1100 (250000) |
15 (11000) |
350 (78000) |
180 (40000) |
152 | 152 | 5768 |
| QY140 | 140 (5 1/2) |
50 (2) |
NC38 | 1100 (250000) |
15 (11000) |
350 (78000) |
180 (40000) |
152 | 152 | 5768 |
| QY159 | 159 (6 1/4) |
57 (2 1/4) |
NC46 | 2000 (450000) |
30 (22000) |
700 (160000) |
350 (78000) |
152 | 152 | 5939 |
| QY165 | 165 (6 1/2) |
57 (2 1/4) |
NC50 | 2000 (450000) |
30 (22000) |
700 (160000) |
350 (78000) |
152 | 152 | 5939 |
| QY172 | 172 (6 3/4) |
57 (2 1/4) |
NC50 | 2000 (450000) |
30 (22000) |
700 (160000) |
350 (78000) |
152 | 152 | 5939 |
| QY178 | 178 (7) |
70 (2 3/4) |
NC50 | 2400 (540000) |
35 (25800) |
800 (180000) |
400 (90000) |
152 | 152 | 6000 |
| QY203 | 203 (8) |
76.2 (3) |
6 5/8REG | 2800 (630000) |
45 (33000) |
1000 (225000) |
500 (110000) |
152 | 152 | 6000 |
| QY216 | 216 (8 1/2) |
76.2 (3) |
6 5/8REG | 2800 (630000) |
45 (33000) |
1000 (225000) |
500 (110000) |
152 | 152 | 6000 |
| QY229 | 229 (9) |
76.2 (3) |
7 5/8REG | 3000 (630000) |
65 (26000) |
1200 (270000) |
600 (132000) |
152 | 152 | 6106 |
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