Saver sub for a steering tool

Details Saver sub for a steering tool Saver sub for a steering tool

2005-01-25

2005-01-25

Neuder, William (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

C285S148190, C285S331000, C285S357000

Reexamination Certificate

active

06845826

ABSTRACT:
According to one embodiment of the invention, a saver sub for a steering tool includes a main body having an external thread portion adapted to threadably couple to a box end of the steering tool and an internal thread portion adapted to threadably couple a drill bit thereto and a thread shoulder having an outside perimeter and an inside perimeter disposed around a perimeter of the main body. The thread shoulder includes a curved portion associated with the inside perimeter and a tapered portion extending from the curved portion to the outside perimeter and tapering toward the external thread portion.

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Pending U.S. Appl. No. 10/367,535; filed Feb. 14, 2003; entitled: “System and Method for Coupling a Steering Rib to a Rotary Steerable Directional Drilling Tool”, Inventors: Dagobert Feld, et al.
Pending U.S. Appl. No. 10/367,526: filed Feb. 14, 2003; entitled: “Steering Tool Power Generating System and Method”, Inventors: Martin Helms, et al.

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