Wellbore percussion adapter and tubular connection

摘要

A percussion adapter that is driven to generate a percussive axial motion on a wellbore structure. One percussion adapter includes a drive connection to mechanically convert rotational drive to axially directed percussive motion. Another percussion adapter employs a valve that creates back pressure causing axially directed percussive motion. A wellbore tubular connection that transitions torque to resist back off when left hand or right hand torque is applied.

主权项

1. A drilling accelerator having a longitudinal axis and comprising:
a housing including an upper end and a lower end; an upper drive shaft rotatably disposed within the housing and configured to receive an input of rotational motion; a rotational to axial mechanical drive converter disposed within the housing and coupled to the upper drive shaft, wherein the rotational to axial mechanical drive converter is configured to convert the rotational motion of the upper drive shaft to an axial sliding motion; a lower drive shaft rotatably disposed within the housing and coupled to the rotational to axial mechanical drive converter, wherein the lower drive shaft is configured to receive the axial sliding motion from the rotational to axial mechanical drive converter and move axially relative the upper drive shaft and the housing; and a lower drill bit installation site coupled to the lower drive shaft and configured to move axially with the lower drive shaft relative to the upper drive shaft and the housing, wherein the lower drill bit installation site is telescopically mounted adjacent the lower end of the housing and slidably moveable relative thereto.