We manufacture 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

01 Design and working procedure Conform to the requirement of API Spec 7 -1 02 Non-API standard type of drill collars are also available as per client`request 03 Cold-rolled thread roots 04 Thread connections are performed with stress relief grooves 05 phosphate threads applied 06 option: