Earth drill rig

Details Earth drill rig Earth drill rig

1985-02-21

1987-01-27

Yost, Frank T.

Tool driving or impacting

With vehicle support for drive

Vehicle motor mechanically coupled to drive tool

173 41, 173 42, E21B 1504

Patent

active

046388710

ABSTRACT:
In an earth drill rig wherein an upwardly and downwardly moving drill-string-turning rotary table is rotated by a kelly bar connected at its lower end to a vertical drive shaft, the kelly bar being journaled for rotation in and the rotary table being mounted for axial movement on a drill frame assembly, the drill frame assembly being mounted on a vehicle for pivoting between an upright position and a substantially horizontal position for transportation, a frame assembly pivot is positioned below the lower end of the kelly bar and a universal coupling connects the lower end of the kelly bar and the vertical drive shaft.

REFERENCES:
patent: 2461373 (1949-02-01), Cox
patent: 3012619 (1961-12-01), Farque
patent: 3139944 (1964-07-01), Smith
patent: 3252527 (1966-05-01), Alexander et al.
patent: 3500938 (1970-03-01), Watson
patent: 3942336 (1976-03-01), Schultenkamper

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-853274