Pressure balanced drilling system and method using the same

A method of controlling a pressure kick, the method comprising:

• directing a first fluid through a first check valve to a first chamber of a hydraulic cylinder;
• directing a second fluid from the first chamber of the hydraulic cylinder to a chamber of a transfer unit;
• actuating a piston of the transfer unit with the second fluid;
• directing a third fluid with the piston of the transfer unit through a second check valve;
• engaging an annular valve with at least one of the first fluid or the third fluid;
• and
• directing the third fluid into a well bore to control the pressure kick.

A well drilling system comprising:

• an annular valve including a reaction chamber;
• an annular packer disposed in the reaction chamber;
• a well casing in fluid communication with the annular valve;
• a first check valve in fluid communication with the annular valve;
• a hydraulic cylinder including
• a first chamber having an inlet and an outlet, wherein the inlet of the first chamber is in fluid communication with an outlet of the first check valve,
• a first piston disposed in the first chamber, and
• a second piston, which is coupled to the first piston and is disposed in a second chamber of the hydraulic cylinder, and which directs a fluid which energizes a blow-out-preventer, a generator, a valve, a sensor, or a combination including at least one of the foregoing, wherein a cross-sectional area of the first piston is greater than a cross-sectional area of the second piston;
• and
• a transfer unit including an inlet, an outlet, and a third piston disposed in the transfer unit,
• wherein the inlet of the transfer unit is in fluid communication with the outlet of the first chamber, the outlet of the transfer unit is in fluid communication with an inlet of a second check valve, and an outlet of the second check valve is in fluid communication with the annular valve, and
• wherein the transfer unit includes a heavy fluid, which has a density greater than a drilling fluid, which is disposed in the well casing.