Shock Absorbers
Shock Absorber is installed at the place near to bit and can buffer and absorb shock of longitudinal force and circumferential stress to protect bit, downhole tools and other surface equipments and to realize optimum performance of rotary speed and weight on bit.
Main Technical Parameters of Shock Absorbers
|
Model |
SJ Series Bi-directional Shock Absorber |
YJ Series Hydraulic Shock Absorber |
|
SJ121 |
SJ159 ¢ó |
SJ178 ¢ó |
SJ203 ¢ò |
SJ229 ¢ò |
YJ121 |
YJ178 ¢òA |
YJ203 ¢ò |
YJ229 ¢ò |
|
O.D. (mm) |
121 |
159 |
178 |
203 |
229 |
121 |
178 |
203 |
229 |
|
I.D. (mm) |
38 |
47 |
57 |
65 |
71.4 |
38 |
57 |
68 |
70 |
|
Max. Working Stroke (mm) |
100 |
120 |
120 |
120 |
120 |
100 |
125 |
120 |
120 |
|
Max. Piston Stroke (mm) |
203 |
203 |
203 |
220 |
230 |
203 |
203 |
140 |
140 |
|
Working Temperature (¡æ) |
-40 ~ +150 |
|
Working Torque (kN¡¤m) |
10 |
15 |
15 |
20 |
20 |
10 |
14.7 |
19.6 |
19.6 |
|
Max. Weight on Bit (kN) |
300 |
340 |
340 |
440 |
540 |
260 |
390 |
490 |
540 |
|
Allowed Upward Tension (mN) |
1.2 |
1.5 |
1.9 |
1.96 |
2.16 |
980 |
1470 |
1960 |
1960 |
|
Length (mm) |
4208 |
5510 |
6210 |
5641 |
5902 |
4116 |
3745 |
3945 |
3885 |
|
Connection API |
NC35 |
NC46 |
NC50 |
6-5/8 REG |
7-5/8 REG |
3-1/2 REG |
NC50 |
6-5/8 REG |
7-5/8 REG |
|
Average Hardness (kN/cm) |
35 |
35 |
39 |
39 |
35 |
35 |
47 |
43 |
47 |
