Method and compositions for use in cementing
AssigneeBJ Services Company
InventorsVirgilio G. Boncan, Dan T. Mueller, Murray J. Rogers, Windall S. Bray
Life of this patent
Estimating the term…
Abstract
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.
Claims37
A method of cementing within a wellbore, comprising:
- introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore;
- and
- allowing 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;
- and
- wherein said aluminum silicate comprises at least one of kaolin, metakaolin, halloysite, dickite, nacrite, or a mixture thereof.
A method of cementing within a wellbore, comprising:
- introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore;
- and
- allowing said cement slurry to set within said wellbore at a temperature of less than about 60.degree. F.;
- wherein said aluminum silicate comprises at least one of kaolin, metakaolin, halloysite, dickite, nacrite, or a mixture thereof.
A method of cementing within a wellbore, comprising:
- introducing a cement slurry comprising a hydraulic cement into an annulus existing between a pipe and said wellbore;
- and
- allowing 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, and wherein said cement slurry substantially prevents intrusion of fluids into said wellbore prior to and after setting of said cement slurry;
- and
- wherein said cement slurry comprises between about 1% and about 25% metakaolin by weight of cement;
- and
- wherein said cement slurry further comprises a foaming agent, and an energizing phase.
A method of cementing within a wellbore, comprising:
- introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore;
- and
- allowing said cement slurry to set within said wellbore;
- wherein said wellbore penetrates at least one formation having a pore pressure and being at least partially productive of a fluid;
- wherein said cement slurry substantially prevents intrusion of said fluid into said into said wellbore prior to and after setting of said cement slurry;
- and
- wherein said aluminum silicate comprises at least one of kaolin, metakaolin, halloysite, dickite, nacrite, or a mixture thereof.
A method of cementing within a wellbore, consisting essentially of:
- introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore;
- and
- allowing 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.
A method of cementing within a wellbore, comprising:
- introducing a cement slurry comprising a hydraulic cement and aluminum silicate into a wellbore;
- and
- allowing 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;
- and
- wherein 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.
Dependencies are inferred from the claim text.