Method of placing pipe into deviated boreholes

Details Method of placing pipe into deviated boreholes Method of placing pipe into deviated boreholes

1980-11-28

1983-05-24

Novosad, Stephen J.

Wells

Processes

Destroying or dissolving well part

166381, 166386, E21B 3314, E21B 4100, E21B 4300

Patent

active

043846165

ABSTRACT:
A method of pushing pipe (e.g., casing) into a highly deviated borehole. The lower end of the pipe is plugged and the lower portion of the pipe string is filled with fluids (e.g., compressed gases, petroleum products, water, etc.) which have a lower density than that of the borehole fluid. This creates a buoyancy effect for the pipe in the deviated portion of the borehole which aids in keeping the pipe from contacting the lower side of the deviated hole. The pipe can be plugged or capped above the lightened section and filled with heavier fluid to aid in forcing the pipe downward into position. The plugs and caps are then removed, e.g., drilled out, when the pipe is ready for use. The fluids are thereby released into the mud slurry.

REFERENCES:
patent: 2107327 (1938-02-01), Creighton
patent: 2698054 (1954-12-01), Brown et al.
patent: 2935129 (1960-05-01), Allen et al.
patent: 3398794 (1968-08-01), Fox, Jr.
patent: 3526280 (1970-09-01), Aulick

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