Roller bit pressure balance and oil storage compensating system

The utility model discloses a roller bit pressure balance and oil storage compensating system, it includes oil storage hole, oil through and the oil filler point of going up the setting at the drill bit bit leg body, its characterized in that the oil storage hole is the cylindrical hole, is equipped with the oil storage ring at the downthehole seal cover of oil storage, and from interior to exterior has installed oily bag in proper order and has kept off ring, oil storage bag, protection cup, gland in the oil storage ring, all be provided with to pass on gland and protection cup to be linked together outside pressing hole and oil storage bag, the oil through is gone up the centre bore through oil storage ring and oily bag fender ring and is linked together with oil storage bag inboard. The utility model discloses done ultimate change to the oil storage system structure, the oil storage hole that will set up on the bit body sets up the cylinder pore structure into simple structure and handling ease, and the space between cylinder oil storage hole and the oil storage bag hole forms the oil storage chamber and is used for storing lubricating grease to satisfy lubrication of jumbo size drill bit and pressure compensation's needs, reinforcing drill bit reliability reaches the purpose that prolongs roller bit life.