Wells – Pistons – fluid driven into well – Surrounding conduit valve or closure opened by piston
Patent
1993-08-17
1994-09-20
Novosad, Stephen J.
Wells
Pistons, fluid driven into well
Surrounding conduit valve or closure opened by piston
166317, 166318, 166289, 166291, E21B 3314, E21B 3414
Patent
active
053480899
ABSTRACT:
The present invention provides a cementing tool for cementing multiple stages within a well. The assembly includes a housing assembly which defines one or more cementing ports. A first sleeve assembly is retained within the housing and is movable from a first position, where the sleeve covers the port, and thereby precludes fluid flow therethrough, to a second position wherein the sleeve opens the cementing port. The apparatus also includes a second sleeve assembly which is movable from a first position away from the cementing port to a second position wherein the sleeve assembly covers the port. The first sleeve is cooperatively configured with the housing assembly to provide engaging surfaces which resist rotation of the first sleeve relative to the housing. Additionally, the first sleeve and the second sleeve assembly are configured to limit relative rotation when the two pieces are longitudinally adjacent one another.
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Brandell John T.
Duell Alan B.
Stepp Lee W.
Christian Stephen R.
Duzan James R.
Halliburton Company
Lynch Michael L.
Novosad Stephen J.
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