Orifice:

It is drilled into an orifice plate held by an orifice fitting.

Terms Related to Orifice

• Positive choke

  A choke in which the orifice size must be changed to change the rate of flow through the choke.

• Diameter

  The distance across a circle, measured through its center. In the measure of pipe diameters, the inside diameter is that of the interior circle and ...

• Wash over

  To release pipe that is stuck in the hole by running washover pipe. The washover pipe must have an outside diameter small enough to fit ...

• Tapered string

  Drill pipe, tubing, sucker rods, and so forth with the diameter near the top of the well larger than the diameter below.

• Chain tongs

  A hand tool consisting of a handle and chain that resembles the chain on a bicycle. In general, chain tongs are used for turning pipe ...

• Caliper log

  1. A record showing variations in wellbore diameter by depth, indicating undue enlargement due to caving in, washing, or other causes. The caliper log also ...

• Lower kelly valve

  An essentially full-opening valve installed immediately below the kelly, with outside diameter equal to the tool joint outside diameter.