Annular barrier with axial force mechanism

An annular barrier (1) to be expanded in an annulus (2) between a well tubular structure (3) and an inside wall (4) of a borehole (5) downhole for providing zone isolation between a first zone (221) and a second zone (222) of the borehole, the annular barrier comprising:

• a tubular part (6) extending in a longitudinal direction for mounting as part of the well tubular structure (3),
• an expandable sleeve (7) surrounding the tubular part and defining a space (30) being in fluid communication with an inside (64) of the tubular part,
• a first fluid passage (11, 61) for letting fluid into the space to expand the sleeve, and
• a connection unit (120) comprising:
• a connection part (12) slidably connected with the tubular part, a first end (9) of the expandable sleeve being connected with the connection part,
• a stationary part (16) fixedly connected with the tubular part, and
• an actuation mechanism (20) adapted to induce an axial force on the first end of the expandable sleeve, whereby the connection part is displaced in the longitudinal direction towards a second end (10) of the expandable sleeve connected with the tubular part,
• wherein the actuation mechanism further comprises a pressure chamber (21) at least partly defined between a face (121) of the connection part and a face (161) of the stationary part, and a hydraulic pump (152) fluidly connected with the pressure chamber, the hydraulic pump being adapted to push the connection part in the longitudinal direction by pumping a hydraulic fluid into the pressure chamber.

An annular barrier (1) for being expanded in an annulus (2) between a well tubular structure (3) and an inside wall (4) of a borehole (5) downhole for providing zone isolation between a first zone (221) and a second zone (222) of the borehole, the annular barrier comprising:

• a tubular part (6) extending in a longitudinal direction for mounting as part of the well tubular structure (3),
• an expandable sleeve (7) surrounding the tubular part and defining a space (30) being in fluid communication with an inside (64) of the tubular part,
• a first fluid passage (11, 61) for letting fluid into the space to expand the sleeve, and
• a connection unit (120) comprising:
• a connection part (12) slidably connected with the tubular part, a first end (9) of the expandable sleeve being connected with the connection part,
• a stationary part (16) fixedly connected with the tubular part, and
• an actuation mechanism (20) adapted to induce an axial force on the first end of the expandable sleeve, whereby the connection part is displaced in the longitudinal direction towards a second end (10) of the expandable sleeve connected with the tubular part,
• wherein the actuation mechanism further comprises a pressure chamber (21) at least partly defined between a face (121) of the connection part and a face (161) of the stationary part, and a pressure-intensifying means (70) comprising an inlet (72a) being in fluid communication with the inside of the tubular part and an outlet (72c) being in fluid communication with the pressure chamber, whereby a hydraulic fluid is supplied to the pressure chamber to push the connection part in the longitudinal direction.

An annular barrier (1) to be expanded in an annulus (2) between a well tubular structure (3) and an inside wall (4) of a borehole (5) downhole for providing zone isolation between a first zone (221) and a second zone (222) of the borehole, the annular barrier comprising:

• a tubular part (6) extending in a longitudinal direction for mounting as part of the well tubular structure (3),
• an expandable sleeve (7) surrounding the tubular part and defining a space (30) being in fluid communication with an inside (64) of the tubular part,
• a first fluid passage (11, 61) for letting fluid into the space to expand the sleeve, and
• a connection unit (120) comprising:
• a connection part (12) slidably connected with the tubular part, a first end (9) of the expandable sleeve being connected with the connection part,
• a stationary part (16) fixedly connected with the tubular part, and
• an actuation mechanism (20) adapted to induce an axial force on the first end of the expandable sleeve, whereby the connection part is displaced in the longitudinal direction towards a second end (10) of the expandable sleeve connected with the tubular part,
• wherein the actuation mechanism further comprises a pressure chamber (21) at least partly defined between a face (121) of the connection part and a face (161) of the stationary part, and a pressure vessel (80) containing a compressed propellant adapted to push the connection part in the longitudinal direction by providing an excess pressure in the pressure chamber upon activation.

An annular barrier (1) to be expanded in an annulus (2) between a well tubular structure (3) and an inside wall (4) of a borehole (5) downhole for providing zone isolation between a first zone (221) and a second zone (222) of the borehole, the annular barrier comprising:

• a tubular part (6) extending in a longitudinal direction for mounting as part of the well tubular structure (3),
• an expandable sleeve (7) surrounding the tubular part and defining a space (30) being in fluid communication with an inside (64) of the tubular part,
• a first fluid passage (11, 61) for letting fluid into the space to expand the sleeve, and
• a connection unit (120) comprising:
• a connection part (12) slidably connected with the tubular part, a first end (9) of the expandable sleeve being connected with the connection part,
• a stationary part (16) fixedly connected with the tubular part, and
• an actuation mechanism (20) adapted to induce an axial force on the first end of the expandable sleeve, whereby the connection part is displaced in the longitudinal direction towards a second end (10) of the expandable sleeve connected with the tubular part,
• wherein the actuation mechanism comprises a rod (23) connected with the connection part to push the connection part in the longitudinal direction.

An annular barrier (1) to be expanded in an annulus (2) between a well tubular structure (3) and an inside wall (4) of a borehole (5) downhole for providing zone isolation between a first zone (221) and a second zone (222) of the borehole, the annular barrier comprising:

• a tubular part (6) extending in a longitudinal direction for mounting as part of the well tubular structure (3),
• an expandable sleeve (7) surrounding the tubular part and defining a space (30) being in fluid communication with an inside (64) of the tubular part,
• a first fluid passage (11, 61) for letting fluid into the space to expand the sleeve, and
• a connection unit (120) comprising:
• a connection part (12) slidably connected with the tubular part, a first end (9) of the expandable sleeve being connected with the connection part,
• a stationary part (16) fixedly connected with the tubular part, and
• an actuation mechanism (20) adapted to induce an axial force on the first end of the expandable sleeve, whereby the connection part is displaced in the longitudinal direction towards a second end (10) of the expandable sleeve connected with the tubular part,
• wherein the connection unit further comprises a piston part (14) slidably connected with the tubular part, the piston part being arranged between the connection part and the stationary part, the pressure chamber being at least partly defined between a face (141) of the piston part and the face of the stationary part, whereby the piston part is adapted to push the connection part in the longitudinal direction.