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US 12,767,877 B2Granted
Methods of reducing circulation loss in a wellbore using a using a volcanic ash sealant composition
AssigneeSaudi Arabian Oil Company
InventorsKhawlah Alanqari, Abdullah Saleh Hussain Al-Yami, Abdulaziz Alhelal
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Abstract
This disclosure methods of reducing circulation loss in a using a sealant composition, including volcanic ash, cement, an epoxy resin, and a crosslinker.
Claims22
A method of reducing circulation loss in a wellbore, comprising:
- applying a sealant composition to the wellbore, the sealant composition comprising:
- volcanic ash, wherein the volcanic ash is in particle form and about 80% of the volcanic ash particles have a diameter of less than about 60 μm;
- cement;
- about 85 wt % to about 97 wt % of epoxy resin;
- and
- a crosslinker.
3 more elements
A method of reducing circulation loss in a wellbore, comprising:
- applying a sealant composition to the wellbore, the sealant composition comprising:
- about 1 wt % to about 10 wt % volcanic ash, wherein the volcanic ash is in particle form and about 80% of the volcanic ash particles have a diameter of less than about 60 μm;
- about 1 wt % to about 10 wt % cement;
- about 85 wt % to about 97 wt % bisphenol-A-epichlorohydrin epoxy resin comprising an oxirane mono [(C12-14)-alkyloxy) methyl] derivative;
- and
- about 1 wt % to about 10 wt % diethylenetriamine (DETA).
3 more elements
Dependencies are inferred from the claim text.