Hydraulically set casing hanger apparatus and packing sleeve

Claim 2

In well bore casing apparatus for supporting an inner string of casing in an outer string of casing supported by an outer casing hanger providing a seat: an inner casing hanger body including a body portion engageable with said seat, a mandrel adapted to be connected to a running string of pipe, means releasably connecting said mandrel to said body, seal means shiftably carried by said mandrel for movement longitudinally of said mandrel from a first position to a second position in sealing engagement with said body and said outer casing hanger, and actuator means shiftable longitudinally of said mandrel for moving said seal means to said second position, said seal means including an axially deformable metallic ring of axially undulate form having inner and outer annular portions respectively inwardly and outwardly deformable into sealing relation with said body and said outer casing hanger upon axial deformation of said ring upon movement of said seal means to said second position.

Claim 3

In well bore casing apparatus as defined in claim 1; said seal means further comprising an annular body of elastomeric material in which said ring is embedded.

Claim 4

In well bore casing apparatus as defined in claim 1; and means for shifting said actuator means including piston and cylinder means on said mandrel and said actuator means defining a pressure chamber, and means for applying fluid pressure to said chamber to move said actuator means.

Claim 5

In well bore casing apparatus as defined in claim 1; anchor means movable on said mandrel by said actuator means and engageable with said outer casing hanger.

Claim 6

In well bore casing apparatus as defined in claim 1; anchor means movable on said mandrel by said actuator means and engageable with said outer casing hanger, said anchor means being connected to said seal means and movable therewith.

Claim 7

In well bore casing apparatus as defined in claim 1; anchor means engageable with said outer casing hanger body responsive to movement of said actuator means longitudinally of said mandrel, said anchor means having a plurality of circumferentially spaced longitudinally extended lock fingers, said outer casing hanger having a recess for receiving said fingers, and said inner casing hanger body having means for deforming said fingers outwardly into said recess upon movement of said actuator means.

Claim 8

In well bore casing apparatus as defined in claim 1; anchor means engageable with said outer casing hanger body responsive to movement of said actuator means longitudinally of said mandrel, said anchor means having a plurality of circumferentially spaced longitudinally extended lock fingers, said outer casing hanger having a recess for receiving the ends of said fingers, and said mandrel having means for deforming said fingers outwardly into said recess upon movement of said actuator means, and including means connecting said anchor means to said actuator means and releasable following outward deformation of said lock fingers to disconnect said actuator means from said anchor means, means connecting said mandrel to said body and releasably to disconnect said mandrel from said body.

Claim 9

In well bore casing apparatus as defined in claim 1; anchor means engageable with said outer casing hanger responsive to movement of said actuator means longitudinally of said mandrel, and means releasably connecting said mandrel to said anchor means and releasable following engagement of said anchor means with said outer casing hanger.

Claim 10

In well bore casing apparatus as defined in claim 8; said means releasably connecting said mandrel to said anchor means including shear pins.

Claim 11

In well bore casing apparatus for supporting an inner string of casing in an outer string of casing supported by an outer casing hanger providing a seat: an inner casing hanger body including a body portion engageable with said seat, a mandrel adapted to be connected to a running string of pipe, means releasably connecting said mandrel to said body, anchor means shiftably carried by said mandrel for movement longitudinally of said mandrel from a retracted position to an expanded position locked to the outer casing hanger, said anchor means comprising a plurality of circumferentially spaced longitudinally extending lock fingers, said outer casing hanger having a recess for receiving said fingers, said inner casing hanger body having means engaged by said fingers upon longitudinal movement of said anchor means for expanding said fingers outwardly into said recess, and means for shifting said anchor means longitudinally of said mandrel.

Claim 12

In well bore casing apparatus for supporting an inner string of casing in an outer string of casing supported by an outer casing hanger providing a seat: an inner casing hanger body including a body portion engageable with said seat, a mandrel adapted to be connected to a running string of pipe, means releasably connecting said mandrel to said body, anchor means shiftably carried by said mandrel for movement longitudinally of said mandrel from a retracted position to an expanded position locked to the outer casing hanger, said anchor means comprising a plurality of circumferentially spaced longitudinally extending lock fingers, said outer casing hanger having a recess for receiving said fingers, said inner casing hanger body having means engaged by said fingers upon longitudinal movement of said anchor means for expanding said fingers outwardly into said recess, and means for shifting said anchor means longitudinally of said mandrel.

Claim 13

In apparatus as defined in claim 10; said shifting means including piston and cylinder means on said mandrel defining a pressure chamber, and means for applying fluid pressure to said chamber to longitudinally shift said anchor means.

Claim 14

In well bore casing apparatus for supporting an inner string of casing in an outer string of casing supported by an outer casing hanger providing a seat: an inner casing hanger body including a body portion engageable with said seat, said outer casing hanger and said body having opposing walls forming an annular space, said body portion having passage means leading between said annular space and the space between said outer and inner casings, a mandrel adapted to be connected to a running string of pipe and having a central passage therethrough, a loading sleeve longitudinally shiftable on said mandrel, seal means and anchor means operable by said loading sleeve and respectively movable from first positions to second positions forming a seal in said annular space and anchoring said body in said outer casing hanger, and fluid pressure operated means for moving said loading sleeve longitudinally of said mandrel to move said seal means and said anchor means from said first positions to said second positions.

Claim 15

In well bore casing apparatus for supporting an inner string of casing in an outer string of casing supported by an outer casing hanger providing a seat: an inner casing hanger body including a body portion engageable with said seat, said outer casing hanger and said body having opposing walls forming an annular space, said body portion having passage means leading between said annular space and the space between said outer and inner casings, a mandrel adapted to be connected to a running string of pipe and having a central passage therethrough, a loading sleeve longitudinally shiftable on said mandrel, seal means and anchor means operable by said loading sleeve and respectively movable from first positions to second positions forming a seal in said annular space and anchoring said body in said outer casing hanger, and fluid pressure operated means for moving said loading sleeve longitudinally of said mandrel to move said seal means and said anchor means from said first positions to said second positions.

Claim 16

In well bore casing apparatus as defined in claim 12; means releasably connecting said seal means and said anchor means to said loading sleeve and releasable following movement of said seal means and said anchor means to said second positions, and means releasably connecting said mandrel to said body and releasable following release of said seal means and said anchor means from said loading sleeve.

Claim 17

In well bore casing apparatus as defined in claim 12; said seal means including an axially deformable metallic ring of axially undulate form having inner and outer annular portions respectively inwardly and outwardly deformable into sealing relation with said opposing walls upon axial deformation of said ring.

Claim 18

In well bore casing apparatus as defined in claim 12; said seal means including an axially deformable metallic ring of axially undulate form having inner and outer annular portions respectively inwardly and outwardly deformable into sealing relation with said opposing walls upon axial deformation of said ring, and an annular body of elastomeric material in which said ring is embedded and deformable therewith into sealing engagement with said opposing walls.

Claim 19

In well bore casing apparatus as defined in claim 12; said seal means including an axially deformable metallic ring of axially undulate form having inner and outer annular portions respectively inwardly and outwardly deformable into sealing relation with said opposing walls upon axial deformation of said ring, and said anchor means including a plurality of circumferentiAlly spaced laterally deformable lock fingers depending from said ring, said body having a wedge portion engageable by said fingers upon movement of said anchor means to said second position for deforming said fingers outwardly, and said outer casing hanger having a lock finger receiving recess.

Claim 20

In well bore casing apparatus as defined in claim 12; said fluid pressure operated means including means providing a pressure chamber between said mandrel and said loading sleeve, a port leading between said mandrel passage and said chamber, and means for closing said port.

Claim 21

In well bore casing apparatus as defined in claim 12; said fluid pressure operated means including means providing a pressure chamber between said mandrel and said loading sleeve, a port leading between said mandrel passage and said chamber, and means for closing said port comprising a sleeve removably disposed in said body passage and having means engageable by a fishing tool for effecting removal of said sleeve and opening of said port for admission of pressure from said mandrel passage to said chamber to move said loading sleeve along said mandrel in one direction.

Claim 22

In well bore casing apparatus as defined in claim 12; said fluid pressure operated means including means providing upper and lower pressure chambers between said mandrel and said loading sleeve, upper and lower ports leading between said mandrel passage and said upper and lower pressure chambers, means in said mandrel for closing said ports and removable from said mandrel passage to open said ports, said lower chamber having fluid therein when said lower port is closed to hold said loading sleeve against movement on said mandrel, and means movable in said mandrel passage for forming a seal between said ports and providing an inlet from said mandrel passage to said upper chamber and an outlet from said lower chamber to said mandrel passage, whereby pressure supplied to said upper pressure chamber will effect movement of said loading sleeve along said mandrel.