| Kelly |
| A square or hexagonal steel pipe which transfers the rotating motion of the rotary table to drill string. |
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| Kerogen |
| The hydrocarbon in oil shales. |
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| Kick |
| A well is said to kick if the formation pressure exceeds the pressure exerted
by the mud column. Indicates blow out. |
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| Kilowatt-Hour (kWh) |
| A unit of energy equal to the work done by one kilowatt acting for one hour. The most commonly used unit of electrical energy. |
