TANK FOR LUBRICATION SYSTEM OF ROLLING CUTTER DRILLING BIT Russian patent published in 2013 - IPC E21B10/24 

FIELD: mining.

SUBSTANCE: tank for lubrication system of a rolling cutter drilling bit includes a housing tightly installed in the hole of a leg, an elastic diaphragm with radial and end steel frame, an annular centring washer, an end pressing element, a taper threaded plug, a side groove on the wall with through holes for the lubricant to leave the cavity of the tank to the lubrication system, as well as a system of channels and holes for supply inside the elastic diaphragm of drilling agent. On the side of the diaphragm, inside the tank there installed is a disc with side thread and a retaining pin mating the hole at the bottom of the tank seat, which allows threading the latter on the disc and regulating the pressing force of the diaphragm seal, end pressing element by means of a torque wrench on the side of an outer end face already after installation of the assembled tank into the seat.

EFFECT: higher operating reliability of the tank, possibility of controlling the actuation threshold of drop of excess pressure with regard to depth of supposed drilling interval.

13 dwg