Case cementing method and system

Details Case cementing method and system Case cementing method and system

1992-11-18

1994-06-28

Neuder, William P.

Wells

Processes

Cementing, plugging or consolidating

166153, E21B 3316

Patent

active

053238583

ABSTRACT:
A system for cementing well casing in a bore hole utilizes only top and bottom cementing plugs. The well casing has on its lower end, an inwardly extending lip to engage a latch on the lower portion of the bottom cementing plug. The bottom cementing plug has a through passage that is covered on the top by a diaphragm and on the bottom by another diaphragm.

REFERENCES:
patent: 2743779 (1956-05-01), Brown
patent: 3183971 (1965-05-01), McEver et al.
patent: 4589495 (1986-05-01), Langer et al.
patent: 4836279 (1989-06-01), Freeman
patent: 4880058 (1989-11-01), Lindsey et al.

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