Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent
1973-11-29
1976-01-06
Abbott, Frank L.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Tool position direction or inclination measuring or...
33312, 175 61, 175 76, 175106, 175107, 175103, 415122, E21B 4702
Patent
active
039305457
ABSTRACT:
A tiltable coupling has one end thereof connected to a down-hole drill and has the other end thereof connected to a section of drill rod. By using that tiltable coupling, it is possible to cause a down-hole drill to drill curved holes in subterranean formations. That tiltable coupling serves to connect the section of drill rod to the down-hole drill, and also serves as a conduit for the compressed air which must be supplied to that down-hole drill.
One preferred embodiment of the tiltable coupling has a fulcrum at one side thereof and has a piston at the opposite side thereof; and that piston will be left inactive whenever a straight section of the hole is to be drilled, but that piston will be actuated whenever a curved section of that hole is to be drilled. Sensors are incorporated into the tiltable coupling to indicate the attitude of the down-hole drill, and some of them lie in a plane at right angles to the plane in which the axis of the piston lies; and hence those sensors can indicate the attitude of the plane in which the curved section of the hole will lie.
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patent: 3407887 (1968-10-01), Vivion
patent: 3561549 (1971-02-01), Garrison
Abbott Frank L.
Favreau Richard E.
St. Joe Minerals Corporation
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