?
+86(400-900-6129)  +86 0453 5979995

Product proposal
More models, download and view full data


Kelly is on the top of the drill stem.Kelly is main driver of the whole drill string. It transmits drill stem weight and torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. When assembled with down hole motor and Turbodrill tools, Kelly should bare the stem weight and Reverse torque,it will Measure the depth of a well and provide a circulation channel. TIANHE Kelly consists of a driving part (square or hexagonal), upper joint (LH connection) and lower joint (RH connection).


Square Kelly

Ordering Instructions

1. Specify the specification of Square/ Hexagonal Kelly: dimension of drive section
2. Specify the required overall length (If non-standard)
3. Specify the required ID (If non-standard)
4. Specify OD, length, type and rotating direction of thread connection  of sub.
5.  Cold rolling for thread root or stress relief groove, or thread makeup out requirements. 

Square Kelly

Ordering Instructions

1. Specify the specification of Square/ Hexagonal Kelly: dimension of drive section
2. Specify the required overall length (If non-standard)
3. Specify the required ID (If non-standard)
4. Specify OD, length, type and rotating direction of thread connection  of sub.
5.  Cold rolling for thread root or stress relief groove, or thread makeup out requirements. 
Related consultation
Tianhe Oil Group Huifeng Petroleum Equipment CO. ltd.