Casing strings and methods of using such strings in subterranean cementing operations
First Claim
Patent Images
1. A method of cementing a pipe string in a subterranean formation, comprising:
- providing a well bore having a first fluid disposed therein;
placing a second fluid into the well bore so as to displace at least a portion of the first fluid therefrom, the second fluid comprising a hydraulic settable component;
placing in the well bore a pipe string having at least one activator disposed adjacent an outer surface thereof;
permitting the second fluid and the activator to contact each other;
permitting the second fluid to set in the well bore; and
placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom, wherein placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom is performed before permitting the second fluid to set in the well bore.
1 Assignment
0 Petitions
Accused Products
Abstract
Improved casing strings, and methods of using improved casing strings in subterranean operations, are provided. An example of a method is a method of cementing a pipe string in a subterranean formation. Another example of a method is a method of cementing a pipe string in a well bore. An example of an apparatus is an improved pipe string comprising at least one pipe section; and a delivery system of an activator; wherein the delivery system of an activator is disposed adjacent an outer surface of the at least one pipe section.
134 Citations
75 Claims
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1. A method of cementing a pipe string in a subterranean formation, comprising:
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providing a well bore having a first fluid disposed therein; placing a second fluid into the well bore so as to displace at least a portion of the first fluid therefrom, the second fluid comprising a hydraulic settable component; placing in the well bore a pipe string having at least one activator disposed adjacent an outer surface thereof; permitting the second fluid and the activator to contact each other; permitting the second fluid to set in the well bore; and placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom, wherein placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom is performed before permitting the second fluid to set in the well bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of cementing a pipe string in a subterranean formation, comprising:
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providing a well bore having a first fluid disposed therein; placing a second fluid into the well bore so as to displace at least a portion of the first fluid therefrom, the second fluid comprising a hydraulic settable component; placing in the well bore a pipe string having at least one activator encapsulated in an activator-encapsulant and disposed adjacent an outer surface thereof; permitting the second fluid and the activator to contact each other; and permitting the second fluid to set in the well bore; wherein providing a pipe string comprising an activator on an outer surface of the pipe string further comprises affixing the activator to a first side of a substrate having two sides, and affixing the second side of the substrate to the outer surface of the pipe string; and wherein the activator-encapsulant comprises a thermoplastic material. - View Dependent Claims (38, 39)
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40. A method of cementing a pipe string in a subterranean formation, comprising:
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providing a well bore having a first fluid disposed therein; placing a second fluid into the well bore so as to displace at least a portion of the first fluid therefrom, wherein the second fluid is a fluid comprising a hydraulic cement, a set retarder, and an invert emulsion comprising oil, water, and an emulsifying agent or a fluid comprising hydraulic settable component, a gel strength inhibiting agent, a set retarder, and a water source; providing a pipe string having at least one activator disposed adjacent an outer surface thereof; placing the pipe string in the well bore; permitting the second fluid and the activator to contact each other; permitting the second fluid to set in the well bore; and placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom, wherein placing a cement composition into the well bore to displace at least a portion of the second fluid therefrom is performed before permitting the second fluid to set in the well bore. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A method of cementing a pipe string in a well bore, comprising:
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placing a well fluid comprising a hydraulic settable component into the well bore; placing in the well bore a pipe string having a cement-composition-activator and a well-fluid-activator disposed on an outer surface thereof; placing a cement composition in the well bore; permitting the cement composition and the cement-composition-activator to contact each other; permitting the well fluid and the well-fluid-activator to contact each other; permitting the cement composition to set in the well bore; and permitting the well fluid to set in the well bore. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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Specification