Choke Valve

A method of flowing a fluid through a choke valve, the method comprising:

• flowing the fluid into a valve body of the choke valve;
• focusing the fluid to flow into an orifice plate aperture of an orifice plate disposed in the valve body, the orifice plate defining a face, the orifice plate aperture extending through the face;
• flowing the fluid out of the valve body downstream of the at least one orifice plate aperture;
• and
• rotating the orifice plate to adjust opening and closing of the orifice plate to control a rate of flow of the fluid, rotation of the orifice plate in a first direction effecting an equal increment opening of the orifice plate aperture and rotation of the orifice plate in a second direction that is opposite the first direction effecting an equal increment closing the orifice plate aperture;
• wherein
• the valve body defines an internal cavity;
• and
• the orifice plate controls a flow of fluid through the choke valve, the orifice plate being disposed within the internal cavity of the valve body;
• wherein:
• the orifice plate includes:
• a center point and being rotatable about a center axis extending longitudinally through the center point;
• and
• a first aperture extending through a face of the orifice plate, the first aperture defining a first equi-incremental phase region, the first aperture being spaced away from the center point of the orifice plate;
• and wherein the first aperture further includes a semi-circular section extending from the first equi-incremental phase region and defining a second equi-incremental phase region.

An orifice plate for a choke valve including a valve body having an internal cavity, the orifice plate comprising:

• a center point and being rotatable about a center axis extending longitudinally through the center point when the orifice plate is disposed within the internal cavity of the valve body;
• and
• a first aperture extending through a face of the orifice plate, the first aperture defining at least a first equi-incremental phase region, the first aperture being spaced away from the center point of the orifice plate,
• wherein:
• rotation of the orifice plate with respect to the center point effects transitioning of the orifice plate among a first plurality of open states, including:
• rotation of the orifice plate in a first direction with respect to the center point effects an equal incremental increase in fluid flow per degree of rotation in an open area of the first equi-incremental phase region and
• an equal incremental decrease in fluid flow per degree of rotation in the open area of the first equi-incremental phase region during rotation of the orifice plate in a second direction opposite the first direction;
• wherein:
• the first aperture further includes a semi-circular section extending from the first equi-incremental phase region and defining a second equi-incremental phase region.