SHOCK ABSORBERS

General Information

BICO DRILLING TOOLS and TIANHE OIL GROUP shock absorbers dampen vibrations in the drill string, preventing vibration damage to the most important components of the BHA. Shock absorbers can be set under MWD systems in directional drilling to prevent the tools from being damaged by repeated stress.

Type YJ shock absorber (damper) is the special drilling tool. The tool absorbes, i.e. reduces an impact force by means of elastic deformation and anti-coagulation formed by hydraulic oil under the effect of external forces. The advantages of the tool, including its simple design, reliable performance and ease of operation, are used for significant absorption of shock loads and vibration damping while drilling. Thus, the use of our shock absorbers helps to extend lifetime of drill bits and drill string, and raise the rate of penetration.

MODEL
Technical Specifications YJ121C YJ160C YJ178C YJ203C YJ229C YJ241C YJ254C YJ305C
Size/ OD (mm) 121 160 178 203 229 241 254 305
Bore/ ID (mm) 38 47 57 64 70 70 71,4 76
Max Stroke (mm) 100 120 120 150 150 150 150 150
Max Bit Weight kN (tf) 250
(25,5)
343
(35)
392
(40)
450
(46)
540
(55)
539
(55)
600
(61)
650
(66)
Torque Force
kN (tf)
1000
(102)
1500
(153)
1500
(153)
2000
(204)
2000
(204)
2000
(204)
2500
(255)
3000
(306)
Torque Transfer
(kN/m)
10 15 15 19,6 19,6 19,6 25 30
Ambient Temperature, °C -40 ~ +150 -40 ~ +150 -40 ~+150 -40 ~ +150 -40 ~ +150 -40 ~ + 150 -40 ~ +150 -40 ~ +150
Connection Thread (└đ▓) NC38 NC46 NC50 6 5/8"
REG
7 5/8"
REG
7 5/8"
REG
8 5/8"
REG
8 5/8"
REG
Overall Length (mm) 3760 4100 3800 4100 3820 3820 3850 4540
Sealing Pressure
(MPa)
30 30 30 30 30 30 30 30