Percussion drilling assembly with annular locking member

Details Percussion drilling assembly with annular locking member Percussion drilling assembly with annular locking member

2011-08-16

2011-08-16

Neuder, William P (Department: 3672)

Wells

Processes

Assembling well part

C175S293000, C175S306000

Reexamination Certificate

active

07997346

ABSTRACT:
A percussion drilling assembly for boring into the earth. In an embodiment, the assembly comprises a tubular case having a central axis and a lower end. In addition, the assembly comprises a driver sub having an upper end threadingly engaged with the lower end of the case. Further, the assembly comprises a annular locking member disposed about the driver sub. The annular locking member engages the case and the driver sub and restricts the rotation of the driver sub relative to the case about the central axis.

REFERENCES:
patent: 2252912 (1941-08-01), Armentrout
patent: 2887891 (1959-05-01), Perez

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