Cementing in deep water offshore wells
AssigneeHalliburton Energy Services, Inc.
InventorsLance E. Brothers, Anthony V. Palmer
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Abstract
An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of preparing a foamed cement composition comprised of calcium aluminate cement, a set accelerating additive, a thickening time increasing additive, water, a gas, and a mixture of foam forming and foam stabilizing surfactants; placing the cement composition in the annulus between the casing and well bore; and allowing the cement composition to set into a hard impermeable mass therein.
Claims20
An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of:
- (a) preparing a foamed cement composition comprised of calcium aluminate cement, a set accelerating additive, a thickening time increasing additive, water in an amount sufficient to form a slurry, a gas in an amount sufficient to form a foam and a mixture of cement composition foam forming and foam stabilizing surfactants present in an amount sufficient to facilitate the formation of and stabilize said foam;
- (b) placing said cement composition in the annulus between said casing and said well bore;
- and
- (c) allowing said cement composition to set into a hard impermeable mass therein.
An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of:
- (a) preparing a foamed cement composition comprised of high alumina content calcium aluminate cement, a set accelerating additive comprised of lithium chloride, a thickening time increasing additive comprised of citric acid, water in an amount sufficient to form a slurry, a gas in an amount sufficient to form a foam and a mixture of cement composition foam forming and foam stabilizing surfactants present in an amount sufficient to facilitate the formation of and stabilize said foam;
- (b) pumping said cement composition into the annulus between said casing and said well bore;
- and
- (c) allowing said cement composition to set into a hard impermeable mass therein.
Dependencies are inferred from the claim text.