Shifting apparatus

Apparatus for at least partial insertion within a longitudinally shiftable element comprising:

• a longitudinally extending housing;
• hydraulically releasable means within said housing;
• means communicable with said hydraulically releasable means for manipulation of said hydraulically releasable means;
• control elements within said housing selectively operational to expanded and retracted positions in response to manipulation of said hydraulically releasable means;
• and means on said housing for locking said control elements into expanded position, at least part of said elements when in the expanded position engaging said shiftable element and governing longitudinal movement thereof, said elements when in the retracted position disengaging said shiftable element.

Apparatus for at least partial insertion within a longitudinally shiftable element comprising:

• a longitudinally extending housing;
• hydraulically releasable means within said housing;
• means communicable with said hydraulically releasable means for manipulation of said hydraulically releasable means;
• control elements within said housing selectively operational to expanded and retracted positions in response to manipulation of said hydraulically releasable means;
• means on said housing for locking said control elements into expanded position;
• and means within said housing for urging said control elements out of locking and expanded position, at least part of said elements when in the expanded position engaging said shiftable element and governing longitudinal movement thereof, said elements when in the retracted position disengaging said shiftable element.

Apparatus for at least partial insertion within a longitudinally shiftable element, comprising:

• a longitudinally extending housing;
• an inflatable device within said housing;
• means communicable with said inflatable device for selective control of fluid pressure within and manipulation of said inflatable device;
• control elements within said housing selectively operational to expanded and retracted positions in response to manipulation of said inflatable device, means on said housing for locking said control elements into expanded position;
• and means within said housing for urging said control elements out of locking and expanded position, at least part of said elements when in the expanded position extending out of and away from said housing, said elements when in the expanded position engaging said shiftable elements and governing longitudinal movement thereof, said elements when in the retracted position disengaging said shiftable element.

Apparatus for the setting of a longitudinally extendable piling unit for anchoring an offshore platform for subsequent use in drilling, production, completion and workover of a subterranean well, said apparatus comprising:

• a longitudinally extending housing;
• an inflatable device within said housing;
• means communicable with said inflatable device for selective control of fluid pressure within and manipulation of said inflatable device;
• control elements within said housing selectively operational to expanded and retracted positions in response to manipulation of said inflatable device;
• and means on said housing for locking said control elements into expanded position, at least part of said elements when in the expanded position extending out of and away from said housing, said elements when in the expanded position engaging said piling and governing the longitudinal movement thereof, said elements when in the retracted position disengaging said shiftable element from said piling.

Apparatus in conjunction with the setting of a longitudinally extendable piling unit for anchoring an offshore platform for subsequent use in drilling, production, completion and workover of a subterranean well, said apparatus comprising:

• a longitudinally extending housing;
• an inflatable device within said housing;
• means communicable with said inflatable device for selective control of fluid pressure within and manipulation of said inflatable device;
• control elements within said housing selectively operational to expanded and retracted positions in response to manipulation of said inflatable device;
• means on said housing for locking said control elements into expanded position;
• and means within said housing for urging said control elements out of locking and expanded position, at least part of said elements when in the expanded position extending out of and away from said housing, said elements when in the expanded position engaging said piling unit and governing longitudinal movement thereof, said elements when in the retracted position disengaging said piling unit.