Top drive drilling apparatus

Details Top drive drilling apparatus Top drive drilling apparatus

2006-12-04

2010-06-29

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

With above-ground means to feed tool

C175S202000, C175S220000, C166S077510, C166S077520

Reexamination Certificate

active

07743853

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 well 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 (7) 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). At least a number of the above referred components of the well drilling apparatus (10) are designed and arranged as component modules, which by means of quick releasable connecting means connect the individual components/modules together.

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International Search Report for PCT/NO2006/000458, mailed Mar. 14, 2007.
Norway Search Report Norway Application No. 20055709, dated Jun. 12, 2006.
International Preliminary Report on Patentability with Written Opinion issued on Jun. 12, 2008 in International Application No. PCT/NO2006/000458.

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