... 7-1, SY/T 5051 We supply the integral spiral blade stabilizer, integral straight-rib stabilizer, sleeve replaceable type ... stabilizer, float valve stabilizer, drilling reamer, unbalanced spiral blade stabilizer and variable-diameter stabilizer, all above products comply ... with API Spec.7.Integral 3-Spiral Blade Stabilizer, Integral 4-Spiral Blade Stabilizer (string type ,near bit type ...