US 11,952,856 B2
Electric blowout preventer bonnet using linear actuated roller screws
Suman Katanguri, Houston, TX (US); Todor K. Sheiretov, Houston, TX (US); and Bruce Boulanger, Sugar Land, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Jun. 2, 2022, as Appl. No. 17/805,146.
Claims priority of provisional application 63/363,727, filed on Apr. 28, 2022.
Claims priority of provisional application 63/196,919, filed on Jun. 4, 2021.
Prior Publication US 2022/0389784 A1, Dec. 8, 2022
Int. Cl. E21B 33/06 (2006.01); E21B 47/00 (2012.01)
CPC E21B 33/061 (2013.01) [E21B 47/00 (2013.01)] 31 Claims
OG exemplary drawing
 
25. A method, comprising:
monitoring a well condition of a wellbore;
actuating an electric blowout preventer (“BOP”) in response to the well condition being indicative of blowout conditions,
wherein the electric BOP comprises:
a main body;
a bore extending axially through the main body;
a ram cavity in communication with the bore, the ram cavity extending laterally on either side of the bore;
a pair of opposing ram blocks disposed in the ram cavity; and
a pair of electric bonnets secured to the main body,
wherein the pair of electric bonnets is correspondingly connected to the pair of opposing ram blocks, each electric bonnet of the pair of electric bonnets comprising:
a housing;
a guide piston disposed in the housing, the guide piston comprising: a piston head; and a connecting rod connected to the piston head, wherein the connecting rod is connected to a corresponding ram block of the pair of opposing ram blocks,
wherein the housing in which the guide piston is disposed is void of any hydraulic fluid;
an electric motor having a motor shaft;
a rear housing connected to the housing;
a gearbox assembly disposed in the rear housing, the gearbox assembly being coupled to the motor shaft of the electric motor;
a roller screw assembly disposed in the rear housing, the roller screw assembly having a first end and a second end,
 wherein the first end of the roller screw assembly is connected to the gearbox assembly, and
 wherein the second end of the roller screw assembly is connected to the guide piston; and
directing the pair of opposing ram blocks toward one another to seal off the bore or shear a tubular string extending through the bore.