The heavy steel member, three-, four-, six-, or eight- sided, suspended from the swivel through the rotary table and connected to the topmost joint of drill […]

Special device that, when fitted into the master bushing, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make hole. It […]

A pneumatically operated device mounted on top of the kelly that, when actuated, causes the kelly to turn or spin. It is useful when the kelly […]

In drilling a well, a channel or groove cut in the side of the hole, parallel to the axis of the hole. Key seating takes place […]

A short joint on which are fixed either spiral or straight blades that are approximately 1/2 inch larger in diam than the largest drill collar in […]

An entry of water, gas, oil, or other formation fluid into the wellbore during drilling. It occurs because the pressure exerted by the column of drilling […]

Kick tolerance is the maximum influx to equal MAASP. It can be expressed as either the maximum intensity or, more commonly, the maximum influx volume that […]

A high-pressure line, connecting the mud pump and the well, through which drilling fluid can be pumped into the well to control a threatened blowout.

A form used to record information and conduct calculations about killing a kick or impending uncontrolled release of hydrocarbons.

The mudweight that will balance formation pressure.

Same as Kill Weight Drilling Fluid.