API 7-1 drill string stabilizer replaceable sleeve stabilizer for oilfield

API standard oilfield stabilizers are manufactured from one solid bar of AISI 4145H modified steel,usually have 3 blade or 4 blades.Professional heat-treatment process guarantees the mechanical strengths meet the requirements of API SPEC7-1.Hardness of 285-341HB can be assured both 1\'\' beneath the outer surface and 4 quadrant across the neck OD.

Replaceable sleeve stabilizer consists of mandrel and sleeve.The function is the same as spiral integral blade stabilizer.It can suit to different hole size and increase working life by changing the different size sleeve.The sleeve is threaded on the mandrel, so the sleeve can be fasten to the mandrel tightly and changed easily.