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US 11,535,789 B1Granted
Methods of making and using a high temperature cementitious composition
AssigneeHalliburton Energy Services, Inc.
InventorsSandip Prabhakar Patil, Samuel J. Lewis, Ganesh Shriniwas Pangu
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Abstract
A method of servicing a wellbore penetrating a subterranean formation, comprising placing into the wellbore a cementitious composition comprising a crosslinked polymeric microgel, a clay, a cementitious material, and water. By incorporating the crosslinked polymeric microgel and the clay as disclosed herein, the cementitious composition can be used at relatively high temperatures.
Claims20
A method of servicing a wellbore penetrating a subterranean formation, comprising:
- placing a cementitious composition into the wellbore,
- wherein the cementitious composition comprises a crosslinked polymeric microgel, a clay, a cementitious material, and water,
- wherein the crosslinked polymeric microgel comprises monomer units of vinyl pyrrolidone, 2-Acrylamido-2-methyl propane sulfonic acid (AMPS), and acrylamide, and
- wherein the vinyl pyrrolidone monomer units are in the crosslinked polymeric microgel in an amount of from about 5 mol % to about 30 mol % based on the total moles of monomer units in a molecule of the crosslinked polymeric microgel, the AMPS monomer units are in the crosslinked polymeric microgel in an amount of from about 40 mol % to about 90 mol % based on the total moles of monomer units in the molecule of the crosslinked polymeric microgel, and the acrylamide monomer units are in the crosslinked polymeric microgel in an amount of from about 5 mol % to about 50 mol % based on the total moles of monomer units in the molecule of the crosslinked polymeric microgel.
1 more element
A method of servicing a wellbore penetrating a subterranean formation, comprising:
- placing a cementitious composition into the wellbore,
- wherein the cementitious composition comprises a crosslinked polymeric microgel, a clay, a cementitious material, and water,
- wherein the crosslinked polymeric microgel comprises monomer units of vinyl pyrrolidone, 2-Acrylamido-2-methyl propane sulfonic acid (AMPS) and acrylamide, and wherein the clay comprises sepiolite, bentonite, attapulgite, or combinations thereof, and
- wherein the vinyl pyrrolidone monomer units are in the crosslinked polymeric microgel in an amount of from about 5 mol % to about 30 mol % based on the total moles of monomer units in a molecule of the crosslinked polymeric microgel, wherein the AMPS monomer units are in the crosslinked polymeric microgel in an amount of from about 40 mol % to about 90 mol % based on the total moles of monomer units in the molecule of the crosslinked polymeric microgel, and wherein the acrylamide monomer units are in the crosslinked polymeric microgel in an amount of from about 5 mol % to about 50 mol % based on the total moles of monomer units in the molecule of the crosslinked polymeric microgel, and
- allowing at least a portion of the cementitious composition to set.
2 more elements
Dependencies are inferred from the claim text.