LOW SURFACE FRICTION DRILL BIT BODY FOR USE IN WELLBORE FORMATION

摘要

A low surface friction body for a drill bit includes a matrix drill bit body. The body includes a particulate phase having a friction-reducing additive, and a binding material that bonds the particulate phase using a suitable manufacturing process such as selective laser sintering. The particulate phase may include tungsten carbide, the friction-reducing additive may be polytetrafluoroethylene, and the binder material may be copper or cobalt. The friction-reducing additive is distributed throughout at least a portion of the drill bit body that includes the surface that will come into contact with drill cuttings and drilling fluid during operation. The molecular properties of the friction-reducing additive result in a drill bit body having a surface that is resistant to sticking even after enduring chipping and other types of wear.

主权项

1. A drill bit including:
a molded matrix drill bit body comprising a particulate phase and a binder material; and
at least one cutting element;wherein the particulate phase comprises a tungsten carbide component and a friction-reducing additive component, the friction-reducing additive component having a lower coefficient of friction than the tungsten carbide component; andwherein the friction-reducing additive component comprises polytetrafluoroethylene and is dispersed within at least a portion of the matrix drill bit body.