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US 10,150,905 B1Granted
Settable, form-filling loss circulation control compositions comprising in situ foamed non-hydraulic sorel cement systems and method of use
AssigneeSaudi Arabian Oil Company
InventorB. Raghava Reddy
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Abstract
This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
Claims4
A foamed cementitious composition, comprising:
- magnesium oxide (MgO);
- a salt selected from the group consisting of magnesium chloride (MgCl2), magnesium sulfate (MgSO4), ammonium hydrogen phosphate (NH4H2PO4), and hydrates thereof;
- a hydrazide or a semi-carbazide;
- an oxidizer;
- and
- a foam surfactant.
3 more elements
Dependencies are inferred from the claim text.