Portable earth drilling apparatus

Details Portable earth drilling apparatus Portable earth drilling apparatus

1975-11-26

1977-05-03

Purser, Ernest R.

Tool driving or impacting

Advance causing or controlling means

Driven flexible member causes advance

173 28, 173 57, E21C 1102

Patent

active

040209091

ABSTRACT:
Earth drilling apparatus comprising an extensible mast constituted by a fixed lower ramp and an upper slide mounted with capability of longitudinal sliding on the fixed ramp. A rotation head for driving a drill string is movable on and guided over the length of the slide and the movements of extension and retraction of the slide are synchronized with ascending and descending displacements respectively of the rotation head. For this purpose two double-acting jacks connect the lower portion of the fixed ramp to the upper portion of the movable slide and each of a first pair of chains is wound on one pulley mounted on the upper extremity of each of the posts of the movable slide and is fixed at one of its extremities to the rotation head and at the other of its extremities to a cross-brace rigidly connecting the upper extremity of the posts of the fixed ramp. Each of a second pair of chains is wound on a pulley mounted at the lower extremity of each of the posts of the movable slide and is fixed at one of its extremities to the rotation head and at the other of its extremities to the cross brace. The axes of said jacks and the axes of said pulleys are disposed in a common plane.

REFERENCES:
patent: 2508835 (1950-05-01), Moon et al.
patent: 3162253 (1964-12-01), Curtis
patent: 3756670 (1973-09-01), Harris

Affiliated with

Also associated with

Rating

Portable earth drilling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-340696