Title:
APPARATUS FOR AND METHOD OF FORMING EXCAVATED HOLE
Document Type and Number:
Japanese Patent JPS5751390
Kind Code:
A
Abstract:
A system for the formation and use of a bore hole, particularly for the recovery of oil from an oil-bearing underground formation. An eversible elongate permeable tube (100), preferably formed of woven cloth, including outer and inner walls, (102, 104), connected at a rollover area (106), is urged into the formation by a driving fluid. Drilling fluid is pumped through a central passageway (120) in the tube and carries a central pipe forward (122). The drilling fluid assists break-up of the formation to form a cuttings slurry which passes back along the outside of the eversible tube (100). Means is provided for turning the tube, as from the vertical to the horizontal, by use of a turning segment in the eversible tube. Such pipe preferably includes a flexible helical segment (122b) capable of turning and of serving as the ultimate support casing. Also, gravel packing techniques.
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Inventors:
BEN UEIDO OOKUSU DEITSUKINSON
ROBAATO UEIN DEITSUKINSON
ROBAATO UEIN DEITSUKINSON
Application Number:
JP11290881A
Publication Date:
March 26, 1982
Filing Date:
July 17, 1981
Export Citation:
Assignee:
DICKINSON BEN WADE O
ROBAATO UEIN DEITSUKINSON
ROBAATO UEIN DEITSUKINSON
International Classes:
E21B7/04; E21B7/06; E21B7/08; E21B7/18; E21B17/18; E21B17/20; E21B19/22; E21B21/00; E21B21/12; E21B23/08; E21B36/02; E21B43/04; (IPC1-7): E21B7/18