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SJ Type Double -Way Bumper (shock absorber)
The SJ type double way bumper is a kind of double-way shock absorbing tool which is used to simultaneously slow down or eliminate the vertically or horizontally shock from drill string.It can reduce the damage due to shocking to drill bit, drilling tool and surface drilling tool so that the purpose of raising drilling speed and of reducing drilling cost shall be reached.
Thechnical specifications and parameters:
Type |
O.D. |
I.D. |
Max.stroke |
Ambient |
Max. |
Max.bit |
Tensile load |
Pull-down |
Thread |
SJ121B |
121 |
38 |
120 |
-40~150 |
10 |
200 |
1000 |
5300 |
3 1/2"REG |
SJ160B |
160 |
45 |
120 |
-40~150 |
15 |
340 |
1500 |
5252 |
NC46 |
SJ178B |
178 |
57 |
120 |
-40~150 |
15 |
400 |
1500 |
5350 |
NC50 |
SJ203B |
203 |
64 |
120 |
-40~150 |
20 |
480 |
1960 |
5853 |
6 5/8"REG |
SJ229B |
229 |
71 |
120 |
-40~150 |
20 |
540 |
1960 |
5900 |
7 5/8"REG |
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