Well casing float shoe or collar

Details Well casing float shoe or collar Well casing float shoe or collar

1983-08-17

1985-08-06

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166328, E21B 3406

Patent

active

045329958

ABSTRACT:
A well casing float shoe which is adapted for a variety of well installations consists of a tubular metal shoe member filled with cementitious material having a longitudinal bore surrounding and securing in place a tubular metal sleeve. The metal sleeve is threaded at the top and bottom ends to receive a variety of sizes and types of check valves. A well casing float collar has the same construction, but the tubular shoe member is replaced with a tubular metal collar with threaded connections both above and below the cementitious filler material.

REFERENCES:
patent: 196904 (1877-11-01), Ingersoll
patent: 1659478 (1928-02-01), Black
patent: 1685307 (1928-09-01), Baker
patent: 1776613 (1930-09-01), Baker
patent: 1842897 (1932-01-01), Culp
patent: 2075293 (1937-03-01), Larkin
patent: 2091428 (1937-08-01), Burt
patent: 2572299 (1951-10-01), Antolch
patent: 2896726 (1959-07-01), Bobo
patent: 3481397 (1969-12-01), Baker
patent: 3525394 (1970-08-01), Pitts et al.

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