Method and apparatus for cementing wells

Details Method and apparatus for cementing wells Method and apparatus for cementing wells

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) E21B 33/16 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2420979

Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20) spaced from the lower end of the tubing. The lower end of the tubing is selectively closed, and swab cups (22) are provided externally of the lower end of the tubing below the cement outlets (20) for restricting passage of cement.

L'invention concerne un appareil (10) permettant de faciliter le couplage et la cimentation de systèmes tubulaires de pompage (12, 28) et comprenant une partie tiges de production (12, 10) destinée à chemiser un trou. La partie tiges de production comprend une extrémité supérieure et une extrémité inférieure et définit une paroi de tubage pourvue d'orifices d'évacuation du ciment (20) situés à distance de l'extrémité inférieure des tiges de production. Cette extrémité inférieure des tiges de production est sélectivement fermée et des coupelles de pistonnage (22) sont disposées à l'extérieur de l'extrémité inférieure du tubage, sous des orifices d'évacuation du ciment (20), afin de limiter le passage du ciment.

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