Inventors:
Richard R. Jones - Allen TX
Kenneth R. Taylor - Allen TX
Assignee:
Atlantic Richfield Company - Los Angeles CA
International Classification:
E21B 3316
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.