Quick-Detachable Casing Protector Quick-detachable casing protector is a manual device to protect external threads of casing. This protector is designed with simple configuration for easy operation. It consists of solid and durable synthetic rubber and high quality steel plate. Steel plate is fixed with bulge wheel lock assembly. The bulge wheel assembly can be locked or opened with the pulling handle. Quick-detachable casing protector is applicable for casing with BTC, LTC, STC, and VAM threads.