Experimental research on integrative treatment of PDC drill bit with cryogenic nitrogen and magnetization

Abstract:

In petroleum and geological exploration drilling, PDC bits have been widely used with good technical and economical results. But in deep drilling, particularly in complicated formations, such as softhard alternate formation, fractured formation, abrasive formation, the penetration rate of PDC bits is slow and the bit life is reduced; thus hindering its further promotion and use. How to increase the performance of the bit, i.e. its strength (hardness) and abrasiveness to resolve above mentioned problems is a very important issue. The integrative treatment of PDC bit with cryogenic nitrogen and magnetization is a simple and effective method to increase the performance of the bit. Results of theoretic study and field practices done by Russian specialists show that the bit performance can be increased effectively with the above treatment method.