Multiple stage cementing of well casing in subsea wells

Details Multiple stage cementing of well casing in subsea wells Multiple stage cementing of well casing in subsea wells

1976-05-10

1977-08-16

Purser, Ernest R.

Wells

With below and above ground modification

Eduction pump or plunger in well

166154, 166193, E21B 712

Patent

active

040420140

ABSTRACT:
A method and apparatus for multiple stage cementing of well casing in subsea wells. Also, a subsea stage cementer, plug stack assembly. The combination with a subsea stage cementer, plug stack assembly of a packing and shipping crate therefor. A trip-plug for operating a stage cementing collar to open the ports thereof. A dart adapted to enter the bore of a hollow plug to block the flow of liquid through the bore.

REFERENCES:
patent: 2738011 (1956-03-01), Mabry
patent: 3364996 (1958-01-01), Brown
patent: 3545542 (1970-12-01), Scott
patent: 3605896 (1971-09-01), Perkins
patent: 3616850 (1971-11-01), Scott
patent: 3730267 (1973-05-01), Scott
patent: 3789926 (1974-02-01), Henley
patent: 3811500 (1974-05-01), Morrisett et al.
patent: 3915226 (1975-10-01), Savage
patent: 3948322 (1976-04-01), Baker

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