Well tools

Claim 2

A tool for retrieving a device from a well bore comprising: a locking collet for releasably coupling said tool with said device; a collet locking sleeve for moving said locking collet between release and locking positions within said well bore when said locking collet is engaged with said device and for freeing said locking collet for return to said release position; a nonresilient first operator sleeve connected with a head end of said tool and adapted to engage said collet locking sleeve for applying a force from said head end of said tool directly to said collet locking sleeve in a direction toward said device for moving said locking collet from said release to said locking position; and a nonresilient second operator sleeve engageable with said first operator sleeve and with said collet locking sleeve responsive to a force applied directly thereto from said head end of said tool in a direction away from said device to move said collet locking sleeve for releasing said locking collet from said device in said well bore.

Claim 3

A well tool in accordance with claim 1 wherein said locking collet comprises a collet having a plurality of locking fingers disposed normally at expanded nonlocking positions and adapted to be contracted radially inwardly to locking relationship around a fishing neck on said well device.

Claim 4

A well tool in accordance with claim 2 wherein said collet locking sleeve for moving said locking collet between release and locking positions comprises a sleeve adapted to be telescoped over said locking collet between first collet release and second collet locking positions for contracting said locking fingers from normally radially expanded release positions to radially contracted locking positions on said well device.

Claim 5

A well tool as defined in claim 3 including means associated with said locking sleeve for holding said sleeve at said first collet release position until a force of predetermined value is applied to said sleeve to release said sleeve for movement to said second collet locking position.

Claim 6

A tool as defined in claim 4 including holding means operatively associated with said locking sleeve and said locking collet whereby said locking sleeve remains at said second locking position over said locking collet until a predetermined force is applied to said tool away from said well device.

Claim 7

A tool in accordance with claim 5 including a shear pin holding said locking sleeve at said first collet release position and a shear pin holding said second operator sleeve at a position whereby said locking sleeve remains in locked relationship around said collet until a predetermined force is applied away from said well device.

Claim 8

A pulling tool for retrieving a well device from a well bore comprising: a body having a head end; an elongated rod slidably supported in said body; a pulling collet supported from an end of said rod, said collet having a plurality of circumferentially spaced radially movable locking fingers normally sprung outwardly to release positions and compressible radially inwardly to locking positions for couplinG over the fishing neck of said well device; a pulling sleeve slidable along said rod; a collet locking sleeve slidably disposed on said pulling sleeve and movable from a first collet release position to a second collet locking position telescopically disposed over said locking collet responsive to a force applied directly from said head end of said said first release position to said second collet locking position, and said operator sleeve collet locking sleeve for compressing said collet fingers radially inwardly around said fishing neck of said well device; a shear pin secured between said pulling sleeve and said collet locking sleeve holding said collet locking sleeve at said first position and severable responsive to a force applied to said head end of said pulling tool toward said well device for releasing said collet locking sleeve for movement to said second locking position along said pulling sleeve and telescopically over said collet fingers; a shear pin secured between said rod and said pulling sleeve holding said pulling sleeve against movement and severable responsive to a predetermined force away from said well device for releasing said pulling sleeve to permit said pulling sleeve to move collet locking sleeve from said second collet locking position back to said first collet release position; and a nonresilient operator sleeve included with said body and slidably engaged on said pulling sleeve, said operator sleeve having a first operator surface engageable with said collet locking sleeve for applying a force from said head end of said pulling tool body directly to said collet locking sleeve for moving said collet locking sleeve from said operator sleeve having a second operator surface engageable with said pulling sleeve for applying a force from said head end of said pulling tool directly to said pulling sleeve in a direction away from said pulling collet for moving said collet locking sleeve from said second collet locking position back to said first collet release position.

Claim 9

A pulling tool for retrieving a well device from a well bore comprising: a body having a head end; an elongated rod slidably supported in said body; a pulling collet supported from an end of said rod, said collet having a plurality of circumferentially spaced radially movable locking fingers normally sprung outwardly to release positions and compressible radially inwardly to locking positions for couplinG over the fishing neck of said well device; a pulling sleeve slidable along said rod; a collet locking sleeve slidably disposed on said pulling sleeve and movable from a first collet release position to a second collet locking position telescopically disposed over said locking collet responsive to a force applied directly from said head end of said said first release position to said second collet locking position, and said operator sleeve collet locking sleeve for compressing said collet fingers radially inwardly around said fishing neck of said well device; a shear pin secured between said pulling sleeve and said collet locking sleeve holding said collet locking sleeve at said first position and severable responsive to a force applied to said head end of said pulling tool toward said well device for releasing said collet locking sleeve for movement to said second locking position along said pulling sleeve and telescopically over said collet fingers; a shear pin secured between said rod and said pulling sleeve holding said pulling sleeve against movement and severable responsive to a predetermined force away from said well device for releasing said pulling sleeve to permit said pulling sleeve to move collet locking sleeve from said second collet locking position back to said first collet release position; and a nonresilient operator sleeve included with said body and slidably engaged on said pulling sleeve, said operator sleeve having a first operator surface engageable with said collet locking sleeve for applying a force from said head end of said pulling tool body directly to said collet locking sleeve for moving said collet locking sleeve from said operator sleeve having a second operator surface engageable with said pulling sleeve for applying a force from said head end of said pulling tool directly to said pulling sleeve in a direction away from said pulling collet for moving said collet locking sleeve from said second collet locking position back to said first collet release position.

Claim 10

A Well tool as defined in claim 7 wherein said locking collet fingers provide a substantially continuous pulling surface to encompass substantially 360* of said fishing neck of said well device when compressed inwardly around said fishing neck.

Claim 11

A well tool for retrieving a well device in a well bore comprising: a tool housing having a first head end portion adapted to be connected in a tool train for supporting and moving said well tool along said well bore, said housing having a second end portion comprising an open-ended cylinder; an annular retainer ring connected at said open end of said cylinder; a pulling sleeve slidably disposed through said retainer ring, said pulling sleeve being engageable at a first end thereof with a first end of said retainer ring within said cylinder; a pulling collet slidably supported from said housing and including a rod portion disposed through said pulling sleeve and having an end portion within said cylinder engageable with said first end of said pulling sleeve for lifting said rod and collet responsive to engagement by said pulling sleeve when said pulling sleeve is engaged by said first end of said retainer ring; means releasably interconnecting said pulling sleeve and said rod of said collet; a collet locking sleeve slidably disposed on said pulling sleeve for movement between a first collet release position and a second collet lock position telescopically over said collet wherein the fingers of said locking collet are compressed radially inwardly to locking position by said collet locking sleeve, said collet locking sleeve having a first operator surface engageable by a second opposite end of said retainer ring for moving said collet locking sleeve to said second collet lock position responsive to a force applied to said head end of said tool housing toward said collet locking sleeve, and said collet locking sleeve having a second surface engageable by said pulling sleeve for retracting said collet locking sleeve from said second positioN back to said first position directly responsive to a force applied to said head end of said tool housing in a direction away from said locking sleeve collet; releasable means between said collet locking sleeve and said pulling sleeve for holding said collet locking sleeve at said first collet release position and releasable responsive to force applied from said head end of said housing through said retainer ring to said first operator surface of said collet locking sleeve toward said locking collet for movement of said collet locking sleeve to said second collet lock position; and said pulling sleeve being adapted to raise said collet locking sleeve from said second position back to said first collet lock release position and to lift said locking collet from said fishing head of said well device responsive to a predetermined force away from said locking collet.

Claim 12

A well tool for retrieving a well device in a well bore comprising: a tool housing having a first head end portion adapted to be connected in a tool train for supporting and moving said well tool along said well bore, said housing having a second end portion comprising an open-ended cylinder; an annular retainer ring connected at said open end of said cylinder; a pulling sleeve slidably disposed through said retainer ring, said pulling sleeve being engageable at a first end thereof with a first end of said retainer ring within said cylinder; a pulling collet slidably supported from said housing and including a rod portion disposed through said pulling sleeve and having an end portion within said cylinder engageable with said first end of said pulling sleeve for lifting said rod and collet responsive to engagement by said pulling sleeve when said pulling sleeve is engaged by said first end of said retainer ring; means releasably interconnecting said pulling sleeve and said rod of said collet; a collet locking sleeve slidably disposed on said pulling sleeve for movement between a first collet release position and a second collet lock position telescopically over said collet wherein the fingers of said locking collet are compressed radially inwardly to locking position by said collet locking sleeve, said collet locking sleeve having a first operator surface engageable by a second opposite end of said retainer ring for moving said collet locking sleeve to said second collet lock position responsive to a force applied to said head end of said tool housing toward said collet locking sleeve, and said collet locking sleeve having a second surface engageable by said pulling sleeve for retracting said collet locking sleeve from said second positioN back to said first position directly responsive to a force applied to said head end of said tool housing in a direction away from said locking sleeve collet; releasable means between said collet locking sleeve and said pulling sleeve for holding said collet locking sleeve at said first collet release position and releasable responsive to force applied from said head end of said housing through said retainer ring to said first operator surface of said collet locking sleeve toward said locking collet for movement of said collet locking sleeve to said second collet lock position; and said pulling sleeve being adapted to raise said collet locking sleeve from said second position back to said first collet lock release position and to lift said locking collet from said fishing head of said well device responsive to a predetermined force away from said locking collet.

Claim 13

A well tool as defined in claim 9 wherein said pulling sleeve includes a pulling flange and said locking sleeve includes a head ring engageable by said pulling flange for lifting said locking sleeve relative to said collet.

Claim 14

A well tool as defined in claim 10 wherein said pulling sleeve and said collet rod are each provided with stop ring members disposed along end portions of said sleeve and said rod within said cylinder for holding said sleeve and said rod in operative relationship in said cylinder and for lifting said sleeve and said rod in manipulating said well tool with said well device.

Claim 15

A well tool as defined in claim 10 wherein said locking collet comprises a plurality of radially flexible circumferentially spaced collet fingers providing shoulder faces comprising a substantially continuous pulling surface encompassing substantially 360* of the fishing neck of said well device at the contracted locking positions of said fingers on said fishing neck minimizing the unit pressure between said locking collet fingers and said fishing neck when pulling said well device from a well bore with said well tool.

Claim 16

The well tool of claim 11 wherein the upper end portion of said pulling sleeve is engaged and lifted by said retainer ring after said collet locking sleeve is moved to said second collet locking position for retrieving said well device and said pulling sleeve is released from said collet rod responsive to a predetermined force away from said well device when said well device is stuck in said well for releasing said well tool from said device whereby said pulling sleeve is first lifted by said retainer ring moving said collet locking sleeve back to said first collet release position and said collet rod is subsequently lifted by said retainer ring and said pulling sleeve lifting and releasing said collet from the fishing neck of said well tool.

Claim 17

A well tool for retrieving a device from a well bore comprising: radially expandable and compressible locking fingers for releasably coupling said tool with said device; a locking sleeve for moving said locking fingers between release and locking positions within said well bore when said tool is engaged with said device and for freeing said locking fingers for return to said release positions; a first nonresilient operator sleeve connected with the head end of said tool and adapted to engage said locking sleeve for applying a force directly from said head end of said tool to said locking sleeve toward said device for moving said locking sleeve along said locking fingers for compressing said locking fingers inwardly to locking positions; and a nonresilient second operator sleeve engageable with said first operator sleeve and with said locking sleeve responsive to a force applied directly from said head end of said tool away from said device for moving said locking sleeve from over said locking fingers for releasing said locking fingers for radial expansion for release from said device in said well bore.

Claim 18

A well tool for retrieving a device from a well bore comprising: radially expandable and compressible locking fingers for releasably coupling said tool with said device; a locking sleeve for moving said locking fingers between release and locking positions within said well bore when said tool is engaged with said device and for freeing said locking fingers for return to said release positions; a first nonresilient operator sleeve connected with the head end of said tool and adapted to engage said locking sleeve for applying a force directly from said head end of said tool to said locking sleeve toward said device for moving said locking sleeve along said locking fingers for compressing said locking fingers inwardly to locking positions; and a nonresilient second operator sleeve engageable with said first operator sleeve and with said locking sleeve responsive to a force applied directly from said head end of said tool away from said device for moving said locking sleeve from over said locking fingers for releasing said locking fingers for radial expansion for release from said device in said well bore.

Claim 19

A well tool for releasably engaging and retrieving a device from a well bore comprising: a collet having a pluralitY of radially compressible and expandable collet fingers for releasable engagement with said device in said well bore; a rod secured to a head end of said collet for supporting said collet; a ring secured on the upper end of said rod providing a lifting surface for raising said tool from locked relationship with said device when said collet is released from said device; a pulling sleeve secured on said rod and slidable along said rod, said pulling sleeve having a flange around a lower end thereof providing an upwardly facing pulling shoulder surface and having a ring around an upper end thereof providing a downwardly facing shoulder surface for lifting said tool and said well device when said device is engaged by said collet; a first shear pin engaged through said rod and said pulling sleeve locking said pulling sleeve on said rod; a collet locking sleeve disposed on said pulling sleeve for movement between an upper collet release position and a lower collet locking position at which said collet locking sleeve compresses said collet fingers radially inwardly around said well device for locking said tool on said well device, said collet locking sleeve having an upper shoulder surface for driving said sleeve downwardly from said upper release position to said lower collet locking position, and said collet locking sleeve having a downwardly facing shoulder surface engageable by said upwardly facing shoulder surface on said pulling sleeve flange for lifting said collet locking sleeve from said lower collet locking position to said upper collet release position; a second shear pin connecting said collet locking sleeve with said pulling sleeve and holding said locking sleeve at an upper collet release position on said pulling sleeve; said second shear pin being weaker than said first shear pin; a tubular tool body disposed over said rod and said pulling sleeve and having a lower retainer ring portion providing an upwardly facing shoulder engageable with said downwardly facing shoulder on said pulling sleeve and having a downwardly facing shoulder engageable with said upwardly facing shoulder on said collet locking sleeve whereby a downward force on said housing applies to force directly to said collet locking sleeve for moving said locking sleeve to a lower collet locking position and an upward force on said housing applies a force directly upwardly from said housing to said pulling sleeve for lifting said pulling sleeve to release said collet from said well device in said well bore; and a tool head connected with said housing body for supporting said tool in a tool string in a well bore and for applying forces upwardly and downwardly to said housing body from said tool head for engaging said tool with said well device and for releasing said tool from said well device in said well bore.

Claim 20

A well tool for releasably engaging and retrieving a device from a well bore comprising: a collet having a pluralitY of radially compressible and expandable collet fingers for releasable engagement with said device in said well bore; a rod secured to a head end of said collet for supporting said collet; a ring secured on the upper end of said rod providing a lifting surface for raising said tool from locked relationship with said device when said collet is released from said device; a pulling sleeve secured on said rod and slidable along said rod, said pulling sleeve having a flange around a lower end thereof providing an upwardly facing pulling shoulder surface and having a ring around an upper end thereof providing a downwardly facing shoulder surface for lifting said tool and said well device when said device is engaged by said collet; a first shear pin engaged through said rod and said pulling sleeve locking said pulling sleeve on said rod; a collet locking sleeve disposed on said pulling sleeve for movement between an upper collet release position and a lower collet locking position at which said collet locking sleeve compresses said collet fingers radially inwardly around said well device for locking said tool on said well device, said collet locking sleeve having an upper shoulder surface for driving said sleeve downwardly from said upper release position to said lower collet locking position, and said collet locking sleeve having a downwardly facing shoulder surface engageable by said upwardly facing shoulder surface on said pulling sleeve flange for lifting said collet locking sleeve from said lower collet locking position to said upper collet release position; a second shear pin connecting said collet locking sleeve with said pulling sleeve and holding said locking sleeve at an upper collet release position on said pulling sleeve; said second shear pin being weaker than said first shear pin; a tubular tool body disposed over said rod and said pulling sleeve and having a lower retainer ring portion providing an upwardly facing shoulder engageable with said downwardly facing shoulder on said pulling sleeve and having a downwardly facing shoulder engageable with said upwardly facing shoulder on said collet locking sleeve whereby a downward force on said housing applies to force directly to said collet locking sleeve for moving said locking sleeve to a lower collet locking position and an upward force on said housing applies a force directly upwardly from said housing to said pulling sleeve for lifting said pulling sleeve to release said collet from said well device in said well bore; and a tool head connected with said housing body for supporting said tool in a tool string in a well bore and for applying forces upwardly and downwardly to said housing body from said tool head for engaging said tool with said well device and for releasing said tool from said well device in said well bore.