Top drive drilling apparatus

Details Top drive drilling apparatus Top drive drilling apparatus

2011-04-26

2011-04-26

Wright, Giovanna C (Department: 3672)

Wells

Above ground apparatus

With means facilitating connecting or disconnecting...

C175S162000, C175S202000, C175S203000

Reexamination Certificate

active

07931077

ABSTRACT:
A well drilling apparatus (10′) (top drive) designed to be suspended from a travelling block (6′) in a drawworks and laterally supported by a dolly (9′) running together with the well drilling apparatus along tracks or rails fixed to a derrick. The drilling apparatus (10′) comprises at least one driving motor (5′), one power transmission (4′) powered by the at least one driving motor (5′), a drive shaft (70) driven from the power transmission (4′) and designed to be connected to a drill string, load transferring means, and a torque arresting device (3′) fixed to and depending from the power transmission (4′). The load transferring means is in the form of a load frame module (1′) that relieves the drive shaft (70) and the power transmission (4′) at the same time as the load frame module (1′) forms a central component module that the other main components of the well drilling apparatus are releasable connected to.

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International Preliminary Report on Patentability with Written Opinion issued on Jun. 12, 2008 in International Application No. PCT/N02006/000457.

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