| 摘要 |
<p>A torque shock absorber apparatus (39) comprised of a mandrel (2) and cylinder (8) with torque absorbing means (8-12, 27) to absorb excessive torque while permitting the transmission of rotational energy to the drill string is connected in the drill string or as the drive mechanism in a jar or accelerator (40) to prevent excessive torque loading of the drill string.</p> |
