Radiation-induced thickening for set-on-command sealant compositions
AssigneeHalliburton Energy Services, Inc.
InventorsSamuel J. Lewis, David F. Myers, James L. Davis, Vikram Rao, Vijay Gupta, Lynn Soby, Andrew K. Dummer
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Abstract
The present invention includes compositions relating to the setting of fluids or slurries in a wellbore. In one embodiment, a sealant composition having a fluid component and a polymeric additive component can be subjected to ionizing radiation. The ionizing radiation can cause bonding between polymeric additive components and create a polymer matrix within the sealant composition that increases the mechanical strength of the sealant composition.
Claims22
A wellbore sealant composition comprising:
- a wellbore treatment fluid;
- a scintillator material;
- cement;
- and
- a comb polymer having anchoring groups and ionizable dispersing groups;
- wherein the scintillator material is capable of emitting secondary radiation upon exposure to the ionizing radiation and selected from the group consisting of LiF/ZnS:Ag, LiI:Eu, NaI:Tl+, Bi4Ge3O12(GSO), Gd2SiO5:Ce3+, ZnS:Ag, CsI, CaF2:Eu, GSO:Ce, YAl:CaTiO3:Ce, and combinations thereof;
- wherein the comb polymer is a polymer that crosslinks when exposed to ionizing radiation;
- and
- wherein the sealant composition is capable of thickening upon exposure to the ionizing radiation.
A cement composition for use in a subterranean formation, comprising:
- hydraulic cement;
- water;
- a chemical retarder;
- a scintillator material;
- and
- a polymeric additive capable of thickening the cement composition upon exposure to ionizing radiation;
- wherein the chemical retarder is used to inhibit setting of the cement composition and wherein the chemical retarder is at least partially destroyed by the ionizing radiation;
- wherein the scintillator material is capable of emitting secondary radiation upon exposure to the ionizing radiation and selected from the group consisting of LiF/ZnS:Ag, LiI:Eu, NaI:Tl+, Bi4Ge3O12(GSO), Gd2SiO5:Ce3+, ZnS:Ag, CsI, CaF2:Eu, GSO:Ce, YAl:CaTiO3:Ce, and combinations thereof;
- and
- wherein the polymeric additive is a polymer that crosslinks when exposed to the ionizing radiation ranging from 1 to 100 KiloGray.
Dependencies are inferred from the claim text.