| Customization: | Available |
|---|---|
| After-sales Service: | 2 Year |
| Warranty: | 2 Year |
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The hydraulic drilling jar is a downhole tool is used if a packer or guns become stuck to provide an upward shock to help pull them loose-without tripping. To deliver repeated jarring as needed, the jar tool automatically resets through the application of string weight on the packer.
Hydraulic drilling jars consist of two pistons separated by a valve, When tension or compression is applied to the armed hydraulic jar fluid in one piston is compressed and flows to the other piston against high flow resistance. The flow rate controls the time required to arm the tool - higher puling/pushing forces result in shorter arming times. The moving distance is called the stroke. When the stroke reaches a certain position, the compressed fluid suddenly fully releases through a bypass valve, shooting the fluid toward the second piston and instantly equalizing pressure between the pistons. The greater the force applied,the higher the compression of the fluid, the shorter the arming time, and the stronger the jarring force generated.
Should the drill string get stuck on the bottom while drilling, or if twist offs happen, then a jar may deliver its releasing effort in an upwards motion. If the pipe becomes stuck off-bottom in key seats, or if it is stuck because of other reasons, it can be released by jarring downwards. The upward reaming methods can then be used in order to recover the whole drill string.
Should differential sticking be encountered, it may be necessary to move the stuck pipe to regain rotation and circulation, so that, for instance, jars can move up and down as normal. A jar actuation won't disturb the directional orientation of the drillstring, so they are useful neutral tools for downhole motor directional drilling and directional jetting.
Jars are also of use in fishing and cutting jobs, as well as for drilling and production tools, cementing, coring operations, and multiple downhole operations.
Full Hydraulic Drilling Jar Type QY adapts the needle valve type structure, the up and down impact are both hydraulic, can realize the up and down tonnage stepless adjustment. It can effectively protect the drill string and improve the service life. The hydraulic energy storage mechanism adopts patent design and has good stability. Delay time range: 30s ~ 240s, Working temperature range: -40ºC ~ 180ºC. Adopt new special materials, with higher performance and safety. Widely used in drilling, coring, workover, fishing and so on.
| 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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