[[:file:surface-production-equipment_fig1.png|Figure 1]] shows a typical wellhead for a flowing well. Notice that a choke is provided to control the rate of production from the well in addition to the tubing wing valve, which provides for a complete shut-off of the production. The choke can be either fixed or variable in size. The choke is nothing more than a small orifice, usually from 1/8 to 3/4 in. in diameter, that restricts the flow rate. | [[:file:surface-production-equipment_fig1.png|Figure 1]] shows a typical wellhead for a flowing well. Notice that a choke is provided to control the rate of production from the well in addition to the tubing wing valve, which provides for a complete shut-off of the production. The choke can be either fixed or variable in size. The choke is nothing more than a small orifice, usually from 1/8 to 3/4 in. in diameter, that restricts the flow rate. |