NOVELTY - The wellbore tool comprises a body, a superhydrophobic surface disposed over a portion of the body, and a flow line. The superhydrophobic surface comprises a patterned surface of a hydrophobic material (18) exhibiting a higher hydrophobicity than an unpatterned surface of the hydrophobic material. The patterned surface comprises a pattern having a first region at a first elevation and a second region at a second elevation. The first region and/or the second region has a lateral dimension of less than or equal to 50 microns, and comprises pits, mounds, and recesses.    USE - USE -The wellbore tool is useful for extracting oil, gas and geothermal heat from a subterranean formation.    ADVANTAGE - ADVANTAGE -The wellbore tool is easy to properly clean and store, and exhibits long lifespan, high performance, and improved operational characteristics.    DETAILED DESCRIPTION - The wellbore tool comprises a body, a superhydrophobic surface disposed over a portion of the body, and a flow line. The superhydrophobic surface comprises a patterned surface of a hydrophobic material (18) exhibiting a higher hydrophobicity than an unpatterned surface of the hydrophobic material. The patterned surface comprises a pattern having a first region at a first elevation and a second region at a second elevation. The first region and/or the second region has a lateral dimension of less than or equal to 50 microns, and comprises pits, mounds, and recesses. The pits and/or mounds are arranged in an ordered pattern or a random arrangement. The first elevation is 200 nm of the second elevation. The body comprises: a cutting element; a bit body (11) configured to retain the cutting element; a seal; and a sensor. The seal, sensor and flowline have the superhydrophobic surfaces. Each superhydrophobic surface comprise a patterned surface of a material having a higher contact angle with water than an unpatterned surface of the same material. An INDEPENDENT CLAIM is included for a method of forming a wellbore tool.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of an earth-boring tool.    Bit body (11)    Blades (12)    Exterior surface (15)    Nozzles (16)    Hydrophobic material. (18)