Drilling component

A drilling component configured to interconnect a first section and a second section of a drill string, the drilling component comprising:

• a first end portion configured to be arranged to face the first section, wherein the first end portion includes a first interconnecting portion configured to engage a corresponding interconnecting portion of the first section of the drill string;
• a hollow interior configured to extend along a length direction of the drill string and to form a part of a passage through the drill string;
• and
• a wall defining the hollow interior, wherein a part of the passage is formed by a first region having a first cross-section and a second region having a second cross-section, wherein the first region is arranged at the first end portion and extends at least partially along the first interconnecting portion, wherein the second region extends between the first region and a second end portion of the drilling component, wherein the wall in the first region has a cylindrical profile, wherein the wall in the first region is parallel to the wall in the second region, wherein the area of a first cross-section of the wall is smaller than the area of a second cross-section of the wall, and wherein the first cross-section is arranged between the second cross-section and the first end portion.