초록 ▼

Aluminum silicate-containing cement slurries for cementing wellbores in deepwater and cold environments, or in wellbores susceptible to fluid intrusion. The aluminum silicate-containing slurries may also be used as high strength, low density cements for wellbore cementing applications under a variet

Aluminum silicate-containing cement slurries for cementing wellbores in deepwater and cold environments, or in wellbores susceptible to fluid intrusion. The aluminum silicate-containing slurries may also be used as high strength, low density cements for wellbore cementing applications under a variety of conditions. The cement slurries typically comprise a mixture of a reactive aluminum silicate and hydraulic cement, and may include one or more other additives. The cement slurries may optionally be foamed using a foaming agent and energizing phase.

대표청구항 ▼

[ What is claimed is:] [1.] A method of cementing within a wellbore, comprising:introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore; andallowing said cement slurry to set within said wellbore;wherein said wellbore is located in a seafloor at a water depth

[ What is claimed is:] [1.] A method of cementing within a wellbore, comprising:introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore; andallowing said cement slurry to set within said wellbore;wherein said wellbore is located in a seafloor at a water depth greater than about 1000 feet; andwherein said aluminum silicate comprises at least one of kaolin, metakaolin, halloysite, dickite, nacrite, or a mixture thereof. [36.] A method of cementing within a wellbore, comprising:introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore; andallowing said cement slurry to set within said wellbore;wherein said aluminum silicate comprises at least one of kaolin, metakaolin, halloysite, dickite, nacrite, or a mixture thereof; andwherein said introduction of said cement slurry is preceded by introduction of a spacer fluid into said wellbore which serves to displace and substantially remove any drilling mud present in said wellbore.