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US 7,841,400 B2Granted
Apparatus and system to allow tool passage ahead of a bit
AssigneeThrubit B.V.
InventorsPeter Wells, Jon Macrae
Life of this patent
Estimating the term…
Abstract
Drill bits are enable the use of tools in a wellbore when it is undesirable or impossible to remove the drill bit. Drill bits include a drill bit insert, a latch assembly, a housing, a running tool, and a shaft trigger to operate the latch assembly.
Claims5
A running tool, configured to operate a latch assembly, the running tool including:
- a running tool housing including a circumference and a longitudinal axis;
- a drive shaft extending along the longitudinal axis of the running tool and including an outer circumference;
- a mating assembly enclosed within the running tool housing and configured to lockably engage the latch assembly;
- a shaft trigger assembly enclosed within the running tool housing and configured to substantially prevent rotational movement of the drive shaft;
- and
- a torsion spring mechanically connected to the drive shaft and configured to motivate the drive shaft to rotate.
3 more elements
Dependencies are inferred from the claim text.