Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent
1993-10-01
1995-08-29
Melius, Terry Lee
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Sectional guide or shaft having means to lock sections in...
175322, E21B 708
Patent
active
054452309
ABSTRACT:
A downhole drilling subassembly for use with a pressurized fluid carrying drill string extending from a well head down to a bottom of a bore hole. The drill string includes upper and lower sections disposed at an angle relative to each other and having respective upper and lower longitudinal axes. An upper subassembly portion is adapted to couple to the upper section of the drill string. A lower subassembly portion is rotatably carried by the upper subassembly portion and is adapted to couple to the lower section of the drill string. The upper and lower subassembly portions are hollow so as to permit the pressurized fluid to pass therethrough. An assembly responsive to raising the drill string off the bottom of the bore hole and lowering the drill string back onto the bottom of the bore hole is provided for rotating the upper and lower subassembly portions with respect to one another between first and second relative angular positions.
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Wattenburg Eric J.
Wattenburg Willard H.
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