K

Kelly.: A heavy square or hexagonal pipe that passes through rollers in a bushing on the drill floor to transmit rotational torque to the drill string.
Key seat.: A section of a hole, usually of abnormal deviation and relatively soft formation, that has been eroded or worn by drill pipe to a size smaller than the tool joints or collars of the drill string. This keyhole-type configuration resists passage of the shoulders of these pipe upset (box) configurations when pulling out of the hole.
Kick.: Situation caused when the annular hydrostatic pressure in a drilling well temporarily (and usually relatively suddenly) becomes less than the formation, or pore, pressure in a permeable downhole section. A kick occurs before control of the fluid intrusion is totally lost. A blowout is an uncontrolled influx of formation fluid into the well bore. See: blowout, kill fluid.
Kill fluid.: A fluid built with a specific density aimed at controlling a kick or blowout. See: galena.
Kill line.: A line connected to the annulus below the blowout preventers for the purpose of pumping into the annulus while the preventers are closed.
Killing a well.: (1) Bringing a well kick under control. (2) The procedure of circulating a fluid into a well to overbalance formation fluid pressure after the bottom-hole pressure has been less than formation fluid pressure. See: kick, blowout, kill fluid.
Kilowatt-hour.: Horsepower-hour (hp-hr) and kilowatt-hour (kW-hr) are units of work.
Kinematic viscosity.: The kinematic...

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Drilling Fluids Processing Handbook

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