Cementing head apparatus and method of operation

Details Cementing head apparatus and method of operation Cementing head apparatus and method of operation

1980-03-10

1982-03-02

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 70, 166 95, 166113, 166291, E21B 3305

Patent

active

043174868

ABSTRACT:
A cementing head is disclosed, which is particularly designed for injecting an omega-type cementing plug into a well casing. Prior to cementing, the plug is retained in a housing. Located above the plug is a movable plunger, actuated by an operating fluid, such as hydraulic fluid. Below the plug is a control valve. When the valve is closed, it prevents any accidental downward movement of the plug into the well casing. Following injection of the cement slurry into the casing, the valve is opened, and the plunger is moved down to push the plug through the valve and beyond the cement inlet. A fluid such as water is passed through the cement inlet, under pressure, to push the plug down the casing behind the cement slurry.

REFERENCES:
patent: 2481422 (1949-09-01), Haynes et al.
patent: 2662602 (1953-12-01), Schnitter
patent: 3076509 (1963-02-01), Burns et al.
patent: 3175240 (1965-03-01), Hillard
patent: 3216500 (1965-11-01), Diehl
patent: 3322197 (1967-05-01), Baker et al.
patent: 3412798 (1968-11-01), Gregston
patent: 3444928 (1969-05-01), Pitts
patent: 3828852 (1974-08-01), Delano

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