Energy delivery system for supplying hydraulic pressure for severing an intervention medium

An energy delivery system for supplying hydraulic pressure, comprising:

• a tubular comprising a first step and a second step;
• a first isolation piston abutting the first step;
• a second isolation piston abutting the second step;
• an elongated piston concentrically disposed about the tubular, mechanically coupled to a ball valve, and comprising a third step and a fourth step;
• a first actuation piston abutting the third step;
• and
• a second actuation piston abutting the fourth step,
• wherein the elongated piston is configured to be urged by gas pressure between the second isolation piston and the first actuation piston and against the second actuation piston, and
• wherein the first actuation piston and the second actuation piston are configured to transmit force to the elongated piston to actuate the ball valve.

An energy delivery system for supplying hydraulic pressure, comprising:

• a tubular;
• a housing disposed concentrically about the tubular;
• isolation pistons disposed between the tubular and the housing;
• actuation pistons disposed between the tubular and the housing;
• and
• a compression piston disposed between the tubular and the housing,
• wherein a first chamber is formed between the tubular and the housing,
• wherein one or more second chambers are formed between one or more first pairs of the isolation pistons and the actuation pistons,
• wherein one or more third chambers are formed between one or more second pairs of the isolation pistons and the actuation pistons,
• wherein the isolation pistons each comprise a first segment comprising a first axial end and a second axial end, a second segment comprising a first axial end and a second axial end, and a third segment extending radially inward from the first axial end of the first segment to the first axial end of the second segment,
• wherein the second segment is shorter than the first segment,
• wherein the actuation pistons each comprise a fourth segment comprising a first axial end and a second axial end, a fifth segment comprising a first axial end and a second axial end, and a sixth segment extending radially outward from the second axial end of the fourth segment to the second axial end of the fifth segment,
• wherein the fifth segment is shorter than the fourth segment, and
• wherein the actuation pistons are configured to transmit force to the compression piston to reduce a volume of the first chamber to pressurize a control fluid to actuate a ball valve.

An energy delivery system for supplying hydraulic pressure, comprising:

• a tubular;
• a housing disposed concentrically about the tubular;
• isolation pistons disposed between the tubular and the housing;
• actuation pistons disposed between the tubular and the housing;
• and
• a compression piston disposed between the tubular and the housing,
• wherein a first chamber is formed between the tubular and the housing,
• wherein one or more second chambers are formed between one or more first pairs of the isolation pistons and the actuation pistons,
• wherein one or more third chambers are formed between one or more second pairs of the isolation pistons and the actuation pistons,
• wherein a balance chamber is formed between the tubular and the housing,
• wherein the actuation pistons are disposed between the first chamber and the balance chamber,
• wherein a ball valve is disposed in a subsea tree coupled to the energy delivery system by a slick joint,
• wherein the subsea tree comprises a first actuation chamber and a second actuation chamber,
• wherein the ball valve is disposed between the first actuation chamber and the second actuation chamber,
• wherein the slick joint comprises a slick joint line fluidly coupling the first chamber and the second actuation chamber, and
• wherein the actuation pistons are configured to transmit force to the compression piston to reduce a volume of the first chamber to pressurize a control fluid to actuate the ball valve.