The invention discloses a tool used in the technical field of
petroleum drilling, and particularly relates to a
top drive self-adaptive intelligent
shock absorber which comprises a transmission shaft, a spline shell, a lower shell, a transmission shaft sleeve, a cylinder body,
magnetorheological fluid, a spring, a
piston, a coil, a cylinder cover, a
piston rod, an acceleration sensor, a
control unit and a
battery pack. According to the technical scheme, a spring and
magnetorheological fluid are used in cooperation to conduct vibration reduction, the spring provides main elastic supporting and basic buffering, the
magnetorheological fluid can conduct active damping force infinite adjustment of
millisecond response, the spring and the magnetorheological fluid work cooperatively,
broadband vibration and large
impact can be efficiently restrained at the same time, and the vibration reduction effect is good. And the excellent damping effect of combining rigidity and softness and self-adapting to complex working conditions is achieved. The
top drive damping device is connected between a
top drive and a
drill rod, is mainly used for protecting the top drive when a drilling tool jumps in shallow
well drilling operation, and can remarkably improve the damping performance of the top drive, achieve efficient and stable work of the top drive, guarantee smooth drilling operation and avoid accident risks.