Freepoint indicator

Details Freepoint indicator Freepoint indicator

1981-11-18

1984-04-24

Ciarlante, Anthony V.

Measuring and testing

Borehole or drilling

Downhole test

E01B 4709

Patent

active

044440502

ABSTRACT:
A system and apparatus for determining the free point location in a well bore upon determinable criteria. The free point tool, is disposed in a stuck point and actuated at a plurality of locations along the length of the string of pipe. At each location, the free point indicator is fixed in position and the string of pipe is subjected to a motivating force which produces either an elongation of the pipe string or a twisting of the pipe string. The elongation or the twisting is recorded at the surface as a function of time. The downhole indication of elongation or twisting at the location of the free point indicator is also recorded as a function of time. The time delay and the character of the elongation or twisting is indication of the character of the sticking of the pipe.

REFERENCES:
patent: 2716890 (1955-09-01), Martin
patent: 3585857 (1971-06-01), Moore
patent: 4207765 (1980-06-01), Kiff
patent: 4351186 (1982-09-01), Moulin

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