Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit
Patent
1998-12-15
2000-11-21
Neuder, William
Boring or penetrating the earth
Bit or bit element
Nonsymmetrical bit
175 19, 1662426, 285330, 4033595, E21B 1000
Patent
active
061489352
ABSTRACT:
A joint is provided for coupling a pair of elongated members such as a sonde housing and starter rod end to end. Such a joint includes a projection extending in a lengthwise direction from one end of one of the elongated members and a socket in an end of the other of the elongated members, which socket is sized to slidingly receive the projection. A set of alignable transverse openings are provided in the projection and in a wall defining the socket, which openings are configured to receive a removable retainer for mechanically interlocking the projection in the socket. An interlock mechanism, such as a spline and groove connection, prevents relative rotation between the elongated member (e.g., housing and starter rod) when the projection is fully inserted into the socket. To maximize the strength of the joint, the interlock mechanism is preferably located outside of the projection and socket connection, most preferably as an annular formation of splines and grooves coaxial with the socket and projection and located either on the outside of the projection and the inside of the socket wall, or at a location outside of the socket and groove connection.
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Spirol Coiled Pins brochure, Spirol International Corporation, Feb. 1997, 14 pages.
Crane Robert F.
Wentworth Steven W.
Earth Tool Company L.L.C.
Meyers Philip G.
Neuder William
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