FR376753A -
Device applicable to pipe puller "shuttles" for loosening the latter when they are blocked in the pipes or casings of boreholes
- Google Patents
Device applicable to pipe puller "shuttles" for loosening the latter when they are blocked in the pipes or casings of boreholes
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E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B31/00—Fishing for or freeing objects in boreholes or wells
E21B31/12—Grappling tools, e.g. tongs or grabs
E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
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FR376753D1907-04-131907-04-13
Device applicable to pipe puller "shuttles" for loosening the latter when they are blocked in the pipes or casings of boreholes
ExpiredFR376753A
(en)