Oilfield Terminology & Definitions.
Home Topic

Drilling & Completions

Drilling and completions are core phases of oilfield development that transform a geological target into a functional well. The process includes well planning, bit selection, drilling, casing, cementing, and final preparation for hydrocarbon flow.

  • Mud Circulation
    9

    Mud circulation is the continuous, closed-loop process of pumping drilling fluid (commonly called “mud”) down the drill string, out through the drill bit, and back…

  • Packer
    9

    A packer is a critical downhole isolation device used in oil and gas well construction, completion, and production operations. Its primary function is to create…

  • Production Tubing
    4

    Production Tubing is the primary conduit through which reservoir fluids (oil, gas, and water) are transported from the bottom of a wellbore to the surface.…

  • Rig
    8

    A rig in the oil and gas industry is the complete assembly of machinery, equipment, and structures used to drill a wellbore into the earth’s…

  • Top Drive
    10

    A top drive is a critical piece of drilling equipment mounted at the top of the derrick or mast on a drilling rig. It replaces…

  • Underbalanced Drilling
    7

    Underbalanced drilling (UBD) is a specialized drilling technique in which the hydrostatic pressure of the drilling fluid column is intentionally maintained below the pore pressure…

  • Well Control
    5

    Well Control is the set of principles, procedures, equipment, and personnel actions directed at preventing the uncontrolled flow of formation fluids (oil, gas, or water)…