Formation grouting method and composition useful therefor
First Claim
Patent Images
1. A method of grouting porous gas--and petroleum--bearing formations, which comprises injecting into said formation a composition comprising:
- (a) water(b) particulate slag, having a specific surface area greater than about 9,500 cm2 /g, with less than 3 wt. percent of the particles of said slag being larger than 7.8 micrometers in diameter;
the proportions of water and slag being within a water to slag weight ratio range of between 0.5;
1 and 10;
1;
(c) at least one dispersant in an amount effective to disperse the particles of said particulate slag; and
(d) an accelerator in an amount effective to provide hydraulic reactivity to said slag.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of grouting porous gas--and petroleum--bearing formations with a cementitious material comprising ultrafine ground slag is useful for primary and remedial cementing of a wellbore. A composition is provided which comprises water, a dispersant, slag and an accelerator to activate the slag.
114 Citations
27 Claims
-
1. A method of grouting porous gas--and petroleum--bearing formations, which comprises injecting into said formation a composition comprising:
-
(a) water (b) particulate slag, having a specific surface area greater than about 9,500 cm2 /g, with less than 3 wt. percent of the particles of said slag being larger than 7.8 micrometers in diameter;
the proportions of water and slag being within a water to slag weight ratio range of between 0.5;
1 and 10;
1;(c) at least one dispersant in an amount effective to disperse the particles of said particulate slag; and (d) an accelerator in an amount effective to provide hydraulic reactivity to said slag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 25)
-
-
18. A grouting composition comprising:
-
(a) water; (b) a particulate slag comprising a microfine slag having a specific surface area greater than about 9,500 cm2 /g, with less than 3wt. percent of the particles of said slag being larger than 7.8 micrometers in diameter;
the proportions of water and slag being within a water to slag weight ratio of between 0.5;
1 and 1;
1;(c) at least one dispersant in an amount effective to disperse the particles of said particulate slag; and (d) an accelerator in an amount to provide hydraulic reactivity to the slag. - View Dependent Claims (19, 20, 21)
-
-
22. A grouting composition comprising:
-
(a) water; (b) a particulate slag comprising a microfine slag having a specific surface area greater than about 9,500 cm2 /g, with less than 3 wt. percent of the particles of said slag being larger than 7.8 micrometers in diameter;
the proportions of water and slag being within a water to slag weight ratio of between 0.5;
1 and 10;
1;(c) at least one dispersant in an amount effective to disperse the particles of said particulate slag; and (d) an accelerator in an amount effective to provide hydraulic reactivity to said slag;
said composition having been prepared by mixing in sequence (a) with (c) to form a first mixture, then adding (b) to form a second mixture, then adding (d) to said second mixture, and subjecting the resulting composition to strong agitation. - View Dependent Claims (23, 24)
-
-
26. A method of grouting porous gas--and petroleum--bearing formations, which comprises injecting into said formation a composition comprising:
-
(a) water (b) particulate slag, having a specific surface area greater than about 9,500 cm2 /g, with less than 3 wt. percent of the particles of said slag being larger than 7.8 micrometers in diameter;
the proportions of water and slag being within a water to slag weight ratio range of between 0.3;
1 and 10;
1;(c) at least one dispersant in an amount effective to disperse the particles of said particulate slag; and (d) an accelerator in an amount effective to provide hydraulic reactivity to said slag. - View Dependent Claims (27)
-
Specification