Patent ID: 9272340
Filing Date: 2016-03-01
CPC Classification: B23C,B23P,B23Q,E21B,Y10T

Claim Text:
1. A blowout preventer milling assembly for milling a gasket surface in a blowout preventer, the blowout preventer milling assembly comprising: a. a first leg and a second leg, wherein each leg is removably connected in a first groove and a second groove of the blowout preventer, wherein each groove is on an opposite side of the gasket surface; b. a support frame; c. a first support frame rail and a second support frame rail, with the first support frame rail parallel to the second support frame rail; d. a support frame actuator mounted to the support frame; e. a bridge frame; f. a first bridge rail and a second bridge rail, the first bridge rail parallel to the second bridge rail, with the first bridge rail and the second bridge rail mounted on a first side of the bridge frame; g. a spindle holder mounted to the bridge frame; h. a bridge frame actuator mounted to the bridge frame, wherein the bridge frame actuator moves the spindle holder along the first and second bridge rails at a 90 degree angle to the first and second support frame rails; i. a pneumatic spindle comprising a calibration head and a cutting head, wherein the pneumatic spindle is removably mounted in the spindle holder and is connected to a pneumatic air supply providing operational air pressure; and j. a portable controller in communication with the support frame actuator, the bridge frame actuator, a network, and a power supply, wherein the portable controller comprises: