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US 2019/0316022 A1Published application
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.
Claims8
A method of treating a lost circulation zone, the method comprising:
- a) forming a foamed cementitious composition comprising:
- magnesium oxide (MgO);
- a salt comprising at least one of magnesium chloride (MgCl2), magnesium sulfate (MgSO4), ammonium hydrogen phosphate (NH4H2PO4), or a hydrate thereof;
- a nitrogen gas-generating compound;
- and
- a foam surfactant;
- and
- b) introducing the foamed cementitious composition into the lost circulation zone.
5 more elements
A method of treating a lost circulation zone fluidly connected to a wellbore, the method comprising:
- a) forming a foamed cementitious composition comprising:
- magnesium oxide (MgO);
- a salt comprising at least one of magnesium chloride (MgCl2), magnesium sulfate (MgSO4), ammonium hydrogen phosphate (NH4H2PO4), or a hydrate thereof;
- a hydrazide or a semi-carbazide, or both;
- an oxidizer;
- and
- a foam surfactant;
- and
- b) introducing the foamed cementitious composition into the lost circulation zone.
6 more elements
Dependencies are inferred from the claim text.