整体翼型稳定器
The integral blade stabilizer has a single piece body made of 4145 H modified alloy steel, fully heat treated to 285-341 Brinell hardness and 40 ft x lb minimum impact strength. Integral stabilizers are available in either open design or tight design, near bit or string type. Connections are gauged to API standards. And their Stress relief grooves are cold rolled. Connections are phosphatized or plated copper, coated and equip­ped with thread protectors.