Handling: hand and hoist-line implements – Grapple – Well type
Patent
1976-06-16
1977-06-21
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
294 8628, 294 863, E21B 3112
Patent
active
040307450
ABSTRACT:
An outer tubular body member has a plurality of circumferentially spaced outwardly bowed spring fingers on its inner surface projecting downwardly to near the lower end of the body member and normally spaced apart. An inner tubular member is longitudinally movable in the body member and has a ring portion at its lower end surrounding the upper portions of the spring fingers and movable downwardly to cam the fingers inwardly to grasp a loose article in the well. Latching tongues on the spring fingers engage the ring when the fingers are cammed inwardly. In one form the body member is attachable to a drill string and the upper end of the inner member functions as a piston to be pushed downwardly by drilling mud from the drill string. In another form the inner member can be attached to the drill string and held in an upper position relative to the body member by shear pins which are severable by the weight of the drill string.
REFERENCES:
patent: 784055 (1905-03-01), Kroening
patent: 1526412 (1925-02-01), Brown
patent: 1570065 (1926-01-01), Jones
patent: 1680596 (1928-08-01), Davis
patent: 1742767 (1930-01-01), Hughes
patent: 1761463 (1930-06-01), Beckett
patent: 2352453 (1944-06-01), Salverda
patent: 2709617 (1955-05-01), Lang
Schoeffler Romona B.
Schoeffler William N.
LandOfFree
Tool retriever for wells 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 retriever for wells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tool retriever for wells will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-732417