Patent ID: 11920411
Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 8:
9. A drive unit of a top drive system comprising:
a drive stem having an internal recess;
a plurality of ports in the drive stem connected to the internal recess;
a plurality of sliding coupling members movable between a retracted position and an extended position in the ports;
a vector transmission unit operationally coupled to the sliding coupling members to move the sliding coupling members between the retracted position and the extended position;
a tool stem, wherein the tool stem has a polygonal head which is configured to engage a mating polygonal recess within the internal recess of the drive stem, and
wherein engagement between the polygonal head and the polygonal recess provides a torque coupling between the drive stem and the tool stem; and
wherein the vector transmission unit includes one or more actuators coupled to one or more transmission members, wherein each transmission member includes an angled rod engaged with a respective sliding coupling member such that linear force produced by each actuator in a first vertical direction is converted to linear force in a second horizontal direction.