Tool string and means for supporting and rotating the same

Details Tool string and means for supporting and rotating the same Tool string and means for supporting and rotating the same

1977-04-06

1978-08-15

Purser, Ernest R.

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

173 22, 173 57, 173164, 175 85, 175215, E21C 4500

Patent

active

041065751

ABSTRACT:
Method and apparatus for subterranean slurry drilling and mining of granular ore, such as phosphates, with a combined drilling and mining apparatus. The apparatus includes a tool string having a drilling head and mining head that are selectively interchangeable on its upper end for drilling into one or more ore strata to be mined and thereafter to remove ore from the strata as a slurry. The drill string includes a plurality of inner and outer pipe sections connected to a drill bit at its lower end. A drilling/mining liquid is directed through the tool string during both the drilling and mining modes of operation. During drilling, liquid is directed through a foot valve into the rotating bit to wash cuttings to the surface externally of the tool.

REFERENCES:
patent: 3005504 (1959-05-01), Mayhew
patent: 3312294 (1967-04-01), Wilson
patent: 3623558 (1971-11-01), Brown
patent: 3666026 (1972-05-01), Allard
patent: 3747696 (1973-07-01), Wenneborg et al.

Affiliated with

Also associated with

Rating

Tool string and means for supporting and rotating the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tool string and means for supporting and rotating the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tool string and means for supporting and rotating the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1429898