Patent ID: 11913299
Assignee: ITREC B.V.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 16:
17. A method for drilling a wellbore, wherein use is made of a top drive system of claim 1, and wherein a drilling tubulars string is connected to the assembly of the floating quill shaft and the inner main shaft so that the one or more top drive motors impart rotary torque to the string, and wherein the assembly of the floating quill shaft and the inner main shaft is in a lowered position, whereby the cooperating axial load support faces are engaged, so that a drilling operation load path is established, wherein a load of the drilling tubular string passes via the inner main shaft, the cooperating axial load support faces, the outer main shaft, and the thrust bearing into the thrust bearing housing, and then to the frame structure.