We provide various types of bushing,mainly including roller kelly bushing,rotary table bushing,casing bushing,etc.Our products are according to API Spec 7K standard.
  Roller kelly bushing is a necessary tool for drilling. It is to drive kelly spinner by matching with master bushing. Through rotating of four rollers, the friction between rollers and kelly pipe is reduced and service life is extended. For different sizes of kelly pipe and hexagonal pipe only need to change corresponding rollers. To connect with rotary table, there are two transmission styles (square and pin). The product is designed and manufactured according to API Spec 7K “Specification for Drill Equipment”.
  Our company provide the master bushings and insert bowls with the size from 17-1/2 to 37-1/2 inch. They are cast with high-quality alloy steel and the sizes conform to API Spec 7K. There are two kinds of type. pin drive and square drive.
  Casing bushing is combined by bushing body and insert bowls. It is suitable for handling casing less than 30 in. There are two types: solid and split. CU and CUL are solid bushing, and CB is split bushing.