Stabilizer is made firom AISI 4145H alloy steel. acc. to API Spec.7. All threads are phosphated,copperized or coldworked.
Dimensions and Types of Connection Thread

Stabilizers, also known as drilling stabilizers or drill string stabilizers, are tools used in the drilling of oil and gas wells. They are cylindrical devices that are attached to the drill string above the drill bit. Stabilizers are typically made of high-strength steel and feature a series of blades or fins along their outer surface.
The primary function of a stabilizer is to provide stability and control to the drill string during drilling operations. As the drill bit rotates, the stabilizer helps to keep the drill string centered within the wellbore. This prevents the drill string from deviating off course or becoming unstable, which could lead to inefficient drilling, hole deviation, or even equipment damage.
Stabilizers come in various sizes and configurations to suit different drilling applications. They can be either integral (built into the drill collar) or non-integral (attached separately to the drill string). Integral stabilizers are more commonly used as they provide a more robust and streamlined design.
Besides maintaining stability, stabilizers also serve other purposes. They can help to control the trajectory of the wellbore, ensuring that it follows the desired path. Stabilizers can also assist in preventing differential sticking, a phenomenon where the drill string becomes stuck to the formation due to differential pressure. The blades or fins on the stabilizer create a scraping action against the wellbore, reducing the risk of sticking.
In summary, stabilizers play a crucial role in the drilling process by providing stability, control, and trajectory management to the drill string. By keeping the drill string centered and preventing deviation, stabilizers contribute to efficient drilling operations and help mitigate risks associated with drilling challenges.