Drilling apparatus
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United States of America Patent
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Mar 15, 2016
Grant Date -
Jul 17, 2014
app pub date -
Jan 15, 2013
filing date -
Aug 19, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A drilling apparatus comprised of a multiplicity of subassemblies for drilling an open-hole extension from within an existing cased borehole located in a geological formation for the production of oil and gas. In one embodiment, one subassembly includes a motor located within a cased section of the borehole that rotates a drill pipe segment attached to a rotary drill bit in the open-hole to drill the open-hole extension of the well. In another embodiment, a shroud encloses the motor located within the cased portion of the well that is used to control the mud flow to and from the bit in the open-hole during the drilling process.
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