Drill rod retrieval device

Handling: hand and hoist-line implements – Grapple – Well type

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

294 861, 294 8613, E21B 3120

Patent

active

051412756

ABSTRACT:
A drill rod retrieval device for recovering hollow drill rods that are connectable end to end by coupling means from a drill shaft. The device comprises an internally threaded female section formed within the hollow interior of each of the drill rods and a retrieval member comprising a threaded male member adapted to be inserted down the drill shaft and engaged in the internally theaded female section of an uppermost drill rod. The rod and the retrieval member are threadably engaged one with the other whereupon the retrieval member is removed from the drill shaft with the uppermost drill rod and any additional drill rods connected to the uppermost drill rod.

REFERENCES:
patent: 2305709 (1942-12-01), Johnson
patent: 2912273 (1959-11-01), Chadderdon et al.
patent: 2955655 (1960-10-01), Ware
patent: 3737189 (1973-06-01), Darby
patent: 4681175 (1987-07-01), Bocking et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Drill rod retrieval device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-380297

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.