CASE CEMENTING METHOD AND SYSTEM

摘要

A system for cementing well casing (16) in a bore hole (12) utilizes only to p (22) and bottom (20) cementing plugs. The well casing (16) has on its lower end an inwardly extending lip (18) to engage a latch (30) on the lower portion of the bottom cementing plug (20). The bottom cementing plug (20) has a through passage (26) that is covered on the top by a diaph- ragm (32) and on the bottom by another diaphragm (34).