Cementing apparatus

Details Cementing apparatus Cementing apparatus

1992-05-01

1993-08-10

Britts, Ramon S.

Wells

Pistons, fluid driven into well

With downflow past piston

166156, 166192, 166242, E21B 3316

Patent

active

052340520

ABSTRACT:
There is disclosed an assembly of parts for use in cementing a casing string in a well bore comprising a float collar connectible as part of the string, a cement plug lowerable onto the collar, and a wiper plug lowerable onto the cement plug, the lower end of the cement plug having threads for limited make-up with threads on the upper end of the collar and the lower end of the wiper plug having threads for limited make-up with the cement plug, so as to limit rotation between them.

REFERENCES:
patent: 3550683 (1970-12-01), Comeaux
patent: 4190111 (1980-02-01), Davis
patent: 4711300 (1987-12-01), Wardlaw, III et al.
patent: 4836279 (1989-06-01), Freeman
patent: 4858687 (1989-08-01), Watson
patent: 4979562 (1990-12-01), Langer
patent: 5025858 (1991-06-01), Glaser
patent: 5095980 (1992-03-01), Watson
patent: 5113940 (1992-05-01), Glaser

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