Drilling component coupler for reinforcement

A drill tool usable in drilling a wellbore, the drill tool comprising:

• a pin component having:
• a threaded portion;
• an extended portion extending axially from an end of the threaded portion;
• a recess extending axially from the threaded portion on an opposite end than the extended portion, wherein a first outer surface of the recess comprises a first diameter that is greater than a second diameter of a second outer surface of the extended portion, and wherein the first outer surface of the recess is parallel with the second outer surface of the extended portion;
• and
• a body extending axially from the recess, wherein a third outer surface of the body comprises a third diameter that is greater than the first diameter of the first outer surface of the recess;
• and
• a box component that is part of a stator of a downhole drilling motor, the box component being threadedly coupled to the pin component such that the extended portion of the pin component is positioned in an inner area defined by the box component to absorb stress from the threaded portion during a bend for a wellbore drilling operation.

A wellbore drilling assembly comprising:

• a drill pipe controllable from a surface of a wellbore;
• a top sub-assembly comprising a first end and a second end, the top sub-assembly being coupled to the drill pipe at the first end and having a pin component at the second end, the pin component including:
• a threaded portion;
• an extended portion extending axially from the threaded portion;
• a recess extending axially from the threaded portion on an opposite end than the extended portion, wherein a first outer surface of the recess comprises a first diameter that is greater than a second diameter of a second outer surface of the extended portion, and wherein the first outer surface of the recess is parallel with the second outer surface of the extended portion;
• and
• a body extending axially from the recess, wherein a third outer surface of the body comprises a third diameter that is greater than the first diameter of the first outer surface of the recess
• a drilling motor coupled to the second end of the top sub-assembly, the drilling motor comprising:
• a rotor to generate and transfer torque to a drill bit;
• and
• a stator couplable to the pin component of the top sub-assembly as a box component in a pin-and-box coupling that includes the pin component positioned in an inner area defined by part of the stator.