1. Study of single spherical roller bit;Deng R;J Southwest Petrol Univ,1995
2. One‐cone bits improve efficiency of drilling small diameter holes;Langford JW;Petrol Eng Int,1999
3. WitmanG B WilsonP McdonoughS D et al.Single cone rock bit having inserts adapted to maintain hole gage during drilling: US 7100711.
4. MoranDP WitmanGB.One cone bit with interchangeable cutting structures a box‐end connection and integral sensory devices: US 6814162.
5. Custom designed single‐cone bit works for well of Albania;Anonymous;Oil Gas J,2003