Patent ID: 11897738
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B  E | IPC B  E

Claim 0:
1. A hoisting system comprising:
a crown block;
a traveling block;
a rotatable drive coupled to the traveling block;
a cable assembly that couples the crown block to the traveling block; and
at least one sheave assembly comprising a plurality of sheaves mounted on a common yoke, the at least one sheave assembly being separate from the crown block and the traveling block, and the at least one sheave assembly being moveable between and alternately connectable to the crown and traveling blocks,
wherein connection of the at least one sheave assembly to the crown block or to the traveling block is accomplished remotely,
the traveling block further comprising a sheave cluster including a gap sized to accommodate the plurality of sheaves mounted on the common yoke of the at least one sheave assembly, the gap extending in a direction between sheaves of the sheave cluster of the traveling block, and the direction of the gap being parallel to a rotational axis of the sheaves of the sheave cluster,
wherein, within the gap, the cable assembly runs from the crown block to the at least one sheave assembly;
the hoisting system having:
a first load capacity when the at least one sheave assembly is connected to the crown block in a first configuration; and
a second higher load capacity when the at least one sheave assembly is connected to the traveling block in a second configuration,
wherein the at least one sheave assembly is connected to the crown block and disconnected from the traveling block in the first configuration, and the at least one sheave assembly is disconnected from the crown block and connected to the traveling block in the second configuration,
wherein the hoisting system is configured to raise and lower the traveling block, the rotatable drive, and a component coupled to and extending below the rotatable drive, wherein the rotatable drive is configured to rotate the component.