1. A liner hanger for supporting a liner in a well, comprising:
an expandable tubular hanger having initial run-in diameter and an expanded diameter for supporting the liner in the well;
a running tool supported on a work string and having an internal bore within a tool mandrel for passing fluid through the running tool;
a tubular expander supported on the running tool, the tubular expander having an expander outermost diameter greater than the initial run-in diameter of the tubular hanger;
an actuator for forcibly moving the tubular expander axially from a position substantially axially spaced from the tubular hanger to a position substantially within the tubular hanger, thereby radially expanding the tubular hanger;
a retainer secured to the tool mandrel, such that downward movement of the work string and the retainer releases collet fingers connecting the tool mandrel to the tubular hanger, thereby releasing the collet fingers from the tubular hanger so that the tool may be retrieved to the surface by a first release mechanism;
a hydraulic piston responsive to fluid pressure within the mandrel to selectively engage and disengage a clutch rotatably interconnecting the tool mandrel and a housing supporting latching members, the latching members rotatably interconnecting the tubular hanger and the housing, such that when the clutch is disengaged, rotation of the mandrel will unthread the retainer from the tubular hanger, thereby providing a second release mechanism to retrieve the tool to the surface; and
a safety joint threadably connecting the tool mandrel and the upper collet retainer, such that left-hand rotation of the mandrel axially lowers the retainer relative to the collet fingers, thereby providing a third release mechanism to retrieve a substantial portion of the tool to the surface.
2. A liner hanger as defined in claim 1, wherein rotation of a work string and the mandrel to the right rotates the liner to the right when the clutch is engaged, and rotation of the mandrel to the right unthreads the retainer when the clutch is disengaged.
3. A liner hanger as defined in claim 1, wherein the tubular expander remains downhole with the expanded tubular hanger to support the liner in the well.
4. A liner hanger as defined in claim 1, wherein the actuator comprises a plurality of axially stacked pistons powered by fluid pressure within the mandrel.
5. A liner hanger as defined in claim 1, wherein the safety joint is provided above the retainer.
6. A liner hanger as defined in claim 1, wherein the clutch is provided below the retainer.
7. A liner hanger as defined in claim 1, wherein the latching members are outwardly biased.
8. A liner hanger as defined in claim 1, wherein the liner supports a bit at a lower end thereof.
9. A liner hanger for supporting a liner in a well, comprising:
an expandable tubular hanger having initial run-in diameter and an expanded diameter for supporting the liner in the well;
a running tool supported on a work string and having an internal bore within a tool mandrel for passing fluid through the running tool;
a tubular expander supported on the running tool, the tubular expander having an expander outermost diameter greater than the initial run-in diameter of the tubular hanger;
an actuator for forcibly moving the tubular expander axially from a position substantially axially spaced from the tubular hanger to a position substantially within the tubular hanger, thereby radially expanding the tubular hanger;
a retainer secured to the tool mandrel, such that downward movement of the work string and the retainer releases the tool mandrel from the tubular hanger so that the tool may be retrieved to the surface by a first release mechanism;
a hydraulic piston responsive to fluid pressure within the mandrel to selectively engage and disengage a clutch rotatably interconnecting the tool mandrel and a housing supporting latching members, the latching members rotatably interconnecting the tubular hanger and the housing, such that when the clutch is disengaged, rotation of the mandrel will unthread the mandrel from the tubular hanger, thereby providing a second release mechanism to retrieve the tool to the surface; and
a safety joint threadably connecting the tool mandrel and the tubular hanger, such that left-hand rotation of the mandrel axially lowers the retainer relative to the collet fingers, thereby providing a third release mechanism to retrieve the tool to the surface.
10. A liner hanger as defined in claim 9, wherein rotation of the work string and the mandrel to the right rotates the liner to the right when the clutch is engaged, and rotation of the mandrel to the right unthreads the retainer when the clutch is disengaged.
11. A liner hanger as defined in claim 9, wherein the liner supports a bit at a lower end thereof.
12. A liner hanger as defined in claim 9, wherein the latching members are outwardly biased.
13. A liner hanger as defined in claim 9, wherein the tubular expander remains downhole with the expanded tubular hanger to support the liner in the well.
14. A liner hanger as defined in claim 9, wherein the actuator comprises a plurality of axially stacked pistons powered by fluid pressure within the mandrel.
15. A liner hanger for supporting a liner in a well, comprising:
an expandable tubular hanger having initial run-in diameter and an expanded diameter for supporting the liner in the well;
a running tool supported on a work string and having an internal bore within a tool mandrel for passing fluid through the running tool;
a tubular expander supported on the running tool, the tubular expander having an expander outermost diameter greater than the initial run-in diameter of the tubular hanger, the tubular hanger remaining downhole with the expanded tubular hanger to support the liner in the well;
an actuator including a plurality of axially stacked pistons for forcibly moving the tubular expander axially from a position substantially axially spaced from the tubular hanger to a position substantially within the tubular hanger, thereby radially expanding the tubular hanger;
a retainer secured to the tool mandrel, such that downward movement of the work string and the retainer releases collet fingers connecting the tool mandrel to the tubular hanger, thereby releasing the collet fingers from the tubular hanger so that the tool may be retrieved to the surface by a first release mechanism;
a hydraulic piston responsive to fluid pressure within the mandrel to selectively engage and disengage a clutch rotatably interconnecting the tool mandrel and a housing supporting latching members, the latching members rotatably interconnecting the tubular hanger and the housing, such that when the clutch is disengaged, rotation of the mandrel will unthread the retainer from the tubular hanger, thereby providing a second release mechanism to retrieve the tool to the surface; and
a safety joint threadably connecting the tool mandrel and the upper collet retainer, such that left-hand rotation of the mandrel axially moves the retainer relative to the collet fingers, thereby providing a third release mechanism to retrieve the tool to the surface.
16. A liner hanger as defined in claim 15, wherein rotation of the work string and the mandrel to the right rotates the liner to the right when the clutch is engaged, and rotates the mandrel to the right and unthreads the retainer when the clutch is disengaged.
17. A liner hanger as defined in claim 16, wherein the liner supports a bit at the lower end thereof.
18. A liner hanger as defined in claim 15, wherein the third release mechanism is provided above the first release mechanism.
19. A liner hanger as defined in claim 15, wherein the clutch is provided below the first release mechanism.
20. A liner hanger as defined in claim 15, wherein the latching members are outwardly biased.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A refrigerator comprising:
a door;
a cabinet; and
a latching arrangement, the latching arrangement including:
a striker unit carried by the cabinet, the striker unit having first and second strikers;
a first latch arm comprising a handle portion and carried by the door and pivotable about a first axis, the first latch arm biased to a latched position into engagement with the first striker upon closing the door, and the handle portion manually accessible for releasing the first latch arm to an unlatched position for opening the door; and
a second latch arm coupled to the door and pivotable about a second axis substantially perpendicular to the first axis, the second latch arm moveable between a closed-door unlatched position and a latched ajar-door position, wherein the second latch arm engages the second striker in the latched ajar-door position.
2. The refrigerator of claim 1, wherein the latching arrangement further comprising a break-away attachment between the second latch arm and the second striker when the second latch arm is in the latched position.
3. The refrigerator of claim 1, wherein the first latch arm includes an undercut portion which engages the first striker.
4. The refrigerator of claim 1, further comprising a cap coupled to the door, the cap defining an access for accessing the handle portion.
5. The refrigerator of claim 1, wherein the first and second strikers are integral portions of a single striker.
6. The refrigerator of claim 5, wherein the first striker is substantially C-shaped and defines an opening for receiving a distal end of the first latch arm.
7. The refrigerator of claim 6, wherein the second striker extends from the first striker and is substantially L-shaped.
8. The refrigerator of claim 1, further comprising a flange extending from the first striker, the flange coupled to the second striker.
9. The refrigerator of claim 8, wherein the second striker comprises a pair of cylindrical portions extending from opposite sides of the flange.
10. The refrigerator of claim 1, further comprising a cap coupled to the door, the cap defining an access for accessing the handle portion, wherein the access is symmetrical for left-hand or right-hand mounting of the door to the cabinet.
11. A refrigerator comprising:
a cabinet;
a door selectively mounted to the cabinet for right-hand or left-hand mounting to the cabinet; and
a latching arrangement comprising a first latch arm carried by the door for automatically latching the door to the cabinet upon closing the door, and a second latch arm coupled to the door for latching the door in an ajar position for ventilation;
wherein the first and second arms are pivotable about substantially orthogonal first and second axes.
12. The refrigerator of claim 11, further comprising:
a striker unit carried by the cabinet, the striker unit having first and second strikers, wherein the first latch arm is biased to engage the first striker for latching the door closed, and wherein the second latch arm engages the second striker in the ajar position.