NATIONAL OILWELL VARCO

Fabricated structures used in the production of oil and gas from wells and for the drilling of oil and gas wells, namely, rig structures comprising derricks, drilling masts being parts of machines, drilling rigs, drill floors, power rig jacks, spiders, namely, power machines for use in handling well tubulars, and substructures, namely, foundations for drilling rigs, all for use with drilling rigs, workover rigs used for the repair or stimulation of production wells, off shore and on shore drilling rigs, self-propelled drilling rigs, trailerized drilling rigs, and platform-mounted drilling rigs, operator cabins for use with drilling rigs, machines to remove solids from drilling fluids, and hoisting machinery, namely, cranes and drawworks, namely, machines for reeling out and reeling in the drilling line; oil and gas well drilling machines; oil and gas well pumping machines

electronic instrumentation and controls for monitoring and displaying data associated with the drilling of oil and gas wells and the production of oil and gas from wells