Handling of tube sections in a rig for subsoil drilling
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United States of America Patent
Stats
-
Mar 4, 2003
Grant Date -
N/A
app pub date -
Jan 8, 2001
filing date -
Dec 5, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A drive unit (1) for a subsoil drilling rig comprises a drive unit (5), an engagement unit (12) for releasably engaging a tube section (13) extending therefrom in a drilling direction and a gripper (15) movable relative to the engagement unit (12) between a first position for gripping a tube engaged by the engagement unit (12) and a second position for gripping a tube section (13) in a transfer position. Supplied tube sections (13) can be handled reliably and movements of supplied tube section (13) can be controlled accurately. Co-ordination of positions and movements between the supplied tube sections (13) and the drive unit (1) is simplified. A drilling rig incorporating such a drive unit (1) and a method employing such a drive unit (1) are described as well.
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