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US 9,528,066 B2Granted
High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations
AssigneeHalliburton Energy Services, Inc.
InventorsPing Sui, David Duckworth
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Abstract
An embodiment disclosed herein provides a high-temperature lubricant comprising an oil-soluble lubricating base fluid or a water-soluble lubricating base fluid; and elongated carbon nanoparticles that align in flow. In some embodiments, the lubricating composition may be selected from the group consisting of graphene nanoribbons; carbon nanotubes; carbon nanohorns; and any combination thereof.
Claims12
A drill bit comprising:
- a rotary joint defining a sealed segment and an unsealed segment,
- wherein the sealed segment comprises a high-temperature lubricant comprising an oil-soluble lubricating base fluid or a water-soluble lubricating base fluid and elongated carbon nanoparticles that align in flow in response to frictional forces in the oil-soluble lubricating base fluid or the water-soluble lubricating base fluid, the elongated carbon nanoparticles comprising an oxygen-containing functional group that serve as a chemical handle for functionalization so as to at least partially solubilize the elongated carbon nanoparticles into the oil-soluble lubricating base fluid or the water-soluble lubricating base fluid, the functionalization comprising a water-solubilizing group, an oil-solubilizing group, or a combination of a water-solubilizing group and an oil-solubilizing group.
A method of drilling a subterranean formation comprising:
- providing a drill bit comprising a rotary joint defining a sealed segment and an unsealed segment,
- wherein the sealed segment comprises a high-temperature lubricant comprising an oil-soluble lubricating base fluid or a water-soluble lubricating base fluid and elongated carbon nanoparticles that align in flow in response to frictional forces in the oil-soluble lubricating base fluid or the water-soluble lubricating base fluid, the elongated carbon nanoparticles comprising an oxygen-containing functional group that serve as a chemical handle for functionalization so as to at least partially solubilize the elongated carbon nanoparticles into the oil-soluble lubricating base fluid or the water-soluble lubricating base fluid, the functionalization comprising a water-solubilizing group, an oil-solubilizing group, or a combination of a water-solubilizing group and an oil-solubilizing group;
- and
- drilling a well bore in the subterranean formation with the drill bit.
1 more element
Dependencies are inferred from the claim text.