Aromatic copolyester thermoset downhole tools
AssigneeHalliburton Energy Services, Inc.
InventorsSomen Kumar Bhudolia, Michael Linley Fripp, Sandeep Thatathil, Arpana Singh
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Abstract
A variety of methods and apparatus are disclosed, including, in one embodiment, a downhole tool for use in a borehole, wherein the downhole tool comprises a composite of an aromatic copolyester thermoset (ACT) and a reinforcement material, wherein the ACT has a glass transition temperature of at least 150° C., wherein the ACT is configured to degrade in a water-based fluid having high pH, and wherein the method can include providing the water-based fluid having the pH, such as a pH of at least 11, at least 12, at least 13, or at least 14 in the wellbore, thereby degrading or dissolving the ACT of the downhole tool in the wellbore.
Claims22
A downhole tool for use in a borehole, wherein the downhole tool comprises a composite of an aromatic copolyester thermoset (ACT) and 1 to 80 weight percent of a reinforcement material comprising fibers, wherein the ACT:
- has a glass transition temperature in a range of 150° C. to 350° C.;
- is configured to dissolve in a water-based fluid having a pH of 13 or greater;
- and
- comprises an aromatic polyester backbone interconnected by one or more covalent bonds to form a crosslinked network of oligomers having one or more ester bonds to form an ACT vitrimer capable of dynamic transesterification.
A method of applying downhole tool, comprising:
- deploying the downhole tool into a wellbore, wherein the downhole tool comprises a composite of an aromatic copolyester thermoset (ACT) and 1 to 80 weight percent of a reinforcement material comprising fibers, wherein the ACT:
- has a glass transition temperature in a range of 150° C. to 350° C.;
- and
- comprises an aromatic polyester backbone interconnected by one or more covalent bonds to form a crosslinked network of oligomers having one or more ester bonds to form an ACT vitrimer capable of dynamic transesterification;
- and
- providing a water-based fluid having a pH of 13 or greater in the wellbore, thereby dissolving the ACT of the downhole tool in the wellbore with the water-based fluid having the pH of 13 or greater.
Dependencies are inferred from the claim text.