Downcomer:

Terms Related to Downcomer

• Bumper jar

  A device made up in the drill string that, when actuated, delivers a heavy downward blow to the string. A bumper jar has a hollow ...

• Bottleneck

  An area of reduced diameter in pipe caused by excessive longitudinal strain or by a combination of longitudinal string and the swagging action of a ...

• Formation fracturing

  A method of stimulating production by opening new flow channels in the rock surrounding a production well. Often call a frac job. Under extremely high ...

• Reverse circulation

  The course of drilling fluid downward through the annulus and upward through the drill stem, in contrast to normal circulation in which the course is ...

• Rotary drilling

  A drilling method in which a hole is drilled by a rotating bit to which a downward force is applied. The bit is fastened to ...

• Pig

  1. A flow line clearing device, pumped through the line with normal flow. 2. A scraping tool that is forced through a pipeline or flow ...

• Turbulent flow

  The erratic, nonlinear flow of a fluid, caused by high velocity. Characterized by random eddying flow patterns superimposed on the general flow progressing in a ...