Based on the installation place, this stabilizer can be divided into two types: String type and Near-bit type. Built with inserted round carbide in spiral ribs，the product is outstanding by its high hardness, good toughness and powerful wear resistance, as well as its long service life.

Changeable sleeve stabilizer has the same functions as whole sleeve stabilizer. The difference is that it can be used in various well diameters by changing different bearing sleeves. By changing a same bearing sleeve can also extend the using life of stabilizer.

 

The body (or mandrel) of stabilizer is made of modified alloy steel, and fully heat treated for prospective hardness, strength and impact strength.

The connections are up to API standard，which have stress relief grooves and are cold rolled. The flank of thread is phosphatized or plated copper, coated with thread dope and equipped with thread protectors.

It is mainly the spiral blades (usually three blades, also can be four blades under the customers’ require) , which rub against the borehole wall. The working surface of the blades is hard faced. It is preferred operation that tungsten carbide inserts are cold inserted into the working surface of blades including its bevels. Braze welding tungsten carbide grains are also adopted according to customers’ require.

The mechanical performances of the stabilizer are complied with API Spec.7.