Boring or penetrating the earth – Means carried by housing insertable in inaccessible hole to...
Patent
1981-04-02
1983-01-18
Novosad, Stephen J.
Boring or penetrating the earth
Means carried by housing insertable in inaccessible hole to...
175 61, 175320, 464 19, E21B 404, E21B 414, E21B 17046
Patent
active
043687865
ABSTRACT:
A downhole drilling apparatus for drilling holes at right angles to a vertical well hole which includes a tubular housing capable of being inserted in the well hole and containing at least one elbow tube or guide, and multiple tapered and splined, interlocking drilling segments which are rotatably stacked and nested as a segment string in the guide tube with the bottom one of the drilling segments designed for drilling through the well casing, the concrete sheathing and into the production interval, and the top one of the segments cooperating with a drive means to effect rotation of the nested segments inside the guide. The guide tube extends from the tubular housing wall upwardly and telescopes at the top of the segment string to permit slidable movement of the drive means inside the tubular housing and slidable and rotatable movement of the nested segments inside the guide tube and into the production interval. In a preferred embodiment of the invention a pair of guide tubes and cooperating segment strings are provided in the tubular housing for drilling two transverse drain holes simultaneously.
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Harrison John M.
Novosad Stephen J.
Suchfield George A.
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