Percussion drill string assembly

Details Percussion drill string assembly Percussion drill string assembly

1986-11-26

1988-03-01

Novosad, Stephen J.

Boring or penetrating the earth

Below-ground impact members

175299, E21B 1036

Patent

active

047279443

ABSTRACT:
A percussion drill apparatus is provided which isolates the surfaces that pound on one another from borehole cuttings, while also sealing in grease, all in a compact assembly. The percussion sub which holds the drill bit and which has an anvil surface which can be repeatedly struck, includes a cylindrical outer surface extending down from the anvil surface. The outer barrel, which has a hammer surface that hammers the anvil surface, carries a cage which surrounds the cylindrical surface, and which holds a seal assembly which seals to the cylindrical surface. Thus, percussion occurs in a sealed area.

REFERENCES:
patent: 2815930 (1957-12-01), Storm
patent: 2996131 (1961-08-01), Greenwood
patent: 3599735 (1971-08-01), Slator et al.
patent: 4635728 (1987-01-01), Harrington

Affiliated with

Also associated with

Rating

Percussion drill string assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Percussion drill string assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Percussion drill string assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-992972