Horizontal drilling method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 8, 1998
Grant Date -
N/A
app pub date -
Dec 19, 1996
filing date -
Dec 19, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A bore hole support system is formed from a flexible liner that is readily everted within and inverted from a bore hole and forms a bore hole support system during installation of a casing for the bore hole. After a pilot hole is drilled, the pilot hole is traversed with a reamer to form the pilot hole diameter to a larger diameter for the final bore hole. The flexible liner is everted and pressurized behind the reamer as the reamer traverses the pilot hole to support walls defining the bore hole. The flexible liner may also be used to assist in installation of the casing and well screen. The liner is further extended beyond an entrance location from the bore hole a distance approximating the horizontal bore hole length. A casing is then fixed within the flexible liner, and the flexible liner is inverted back through the bore hole to draw the casing through the bore hole while the casing is enclosed within the flexible liner. The flexible liner is further inverted to remove the flexible liner from about the casing and from within the bore hole.
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