Needle tip and seat for a choke valve

A method, comprising:

• coupling a first plurality of segments to one another to form a needle of a choke valve, wherein a first segment of the first plurality of segments comprises a superhard material, a second segment of the first plurality of segments is disposed at a different axial position of the needle than the first segment, the first segment and the second segment are annular and are configured to receive a base of a third segment of the first plurality of segments to couple the first segment and the second segment to a stem of a choke trim of the choke valve, the third segment comprises a tip, the first segment and the second segment are configured to be positioned between the tip and the stem of the choke trim, the second segment comprises a second material different than the superhard material, the tip of the third segment comprises a third material different than the superhard material and the second material, the superhard material is harder than the second material, and the second material is harder than the third material;
• coupling a second plurality of segments to one another to form a seat of the choke valve, wherein the needle and the seat form the choke trim of the choke valve;
• coupling the third segment of the first plurality of segments to the stem to enable movement of the needle relative to the seat;
• and
• disposing the choke trim in a choke body of the choke valve, such that the choke trim is configured to adjust a cross-sectional area of a flow path of a fluid flowing through the choke valve.

A choke valve, comprising:

• a choke body;
• a choke trim disposed in the choke body, wherein the choke trim is configured to adjust a cross-sectional area of a flow path in the choke body to adjust a fluid flow through the choke valve;
• a needle of the choke trim disposed in the flow path of the fluid flow, wherein the needle comprises a first annular portion having a superhard material and a second annular portion, the first annular portion and the second annular portion are disposed at different axial positions of the needle, the first annular portion and the second annular portion are configured to receive a base of a third portion of the needle to couple the first annular portion and the second annular portion to a stem of the choke trim, the third portion comprises a tip, the first annular portion and the second annular portion are configured to be positioned between the tip and the stem of the choke trim, the second annular portion comprises a second material different than the superhard material, the tip of the third portion comprises a third material different than the superhard material and the second material, the superhard material is harder than the second material, and the second material is harder than the third material;
• and
• a seat of the choke trim, wherein the needle is configured to move along an axis extending through an opening of the seat to adjust the fluid flow through the choke valve.