Run-in and tie back apparatus

An apparatus for supporting conduit and for connecting such conduit to handling pipe having righthand rotated engageable connections, comprising:

• a first well tool having means for attaching to such handling pipe;
• a casing hanger having a tubular body;
• said casing hanger having means for supporting such conduit from said tubular body;
• fastening means for unfastening said well tool from said casing hanger;
• said fastening means permitting the unfastening of said first well tool from said tubular body upon a righthand rotation of such handling pipe;
• a second well tool having means for attaching to such handling pipe;
• and connecting means for connecting said second well tool to said casing hanger;
• said connecting means permitting the connecting of said second well tool to said casing hanger upon a righthand rotation of such handling pipe,
• said casing hanger has included an annular recess and said connecting means includes an expandable latch;
• and means for expanding said expandable latch into said annular recess of said casing hanger by the righthand rotation of such handling pipe.

An apparatus for suspending conduit and for connecting the conduit to handling pipe having righthand rotated engageable connections, comprising:

• a well tool having a tubular portion, said well tool having means for attaching the handling pipe to said tubular portion;
• a casing hanger having a tubular body, said well tool and casing hanger being in fluid communication with the conduit and the handling string;
• means on said casing hanger for suspending the conduit from said tubular body;
• means for fastening said well tool to said casing hanger by a righthand rotation of the handling pipe;
• said fastening means including a latch expandable into a recess in said tubular body;
• means for expanding said expandable latch into said recess of said tubular body solely by the righthand rotation of the handling pipe;
• and
• means for unfastening said well tool from said casing hanger.

A well tool for coupling a handling pipe that has connections engageable upon righthand rotation of such handling pipe and a casing hanger which has internal lefthand threads, comprising:

• a tubular portion;
• means for attaching such handling pipe to said tubular portion;
• means for connecting said tubular portion and such casing hanger upon a rotation of such handling pipe;
• said connecting means being reciprocably mounted on said tubular portion, said connecting means disconnecting such casing hanger from said well tool upon a righthand rotation of such handling pipe,
• said connecting means including a nut splined to the outer surface of said tubular portion;
• said nut having external threads engageable with such internal lefthand threads of such casing hanger whereby upon the righthand rotation of such handling pipe said nut rises on said lefthand threads until said well tool disengages from such casing hanger, said connecting means connecting said well tool to such casing hanger upon the lefthand rotation of such handling pipe;
• means for biasing said nut into engagement with such internal lefthand threads whereby upon the lefthand rotation of such handling pipe said nut engages said lefthand threads thereby connecting said well tool to such casing hanger;
• means for sealingly engaging such casing hanger;
• and
• said sealing means being activated by the weight of such handling string.

A well tool for lowering a casing hanger having a support surface onto a mating internal shoulder of a casing head within a well by means of a handling string comprising:

• a tubular portion telescopingly engaging the casing hanger;
• landing means disposed on said tubular portion for landing said well tool within such casing hanger;
• means for attaching such handling string to said tubular portion;
• connecting means independent of said landing means disposed on said tubular portion and connecting said tubular portion and such casing hanger;
• means for preventing the exposure of said connecting means to any material flowing between such casing hanger and such casing head;
• and
• sealing means rotatably mounted on said tubular portion for sealing engagement with such casing hanger.

A well tool for tying back a riser having connections engageable upon righthand rotation with a casing hanger, comprising:

• a tubular portion;
• means for attaching such riser to said tubular portion;
• connecting means for connecting said tubular portion and such casing hanger;
• said connecting means including an expandable latch which is expanded into a recess in such casing hanger by the rotation of such riser;
• said expandable latch expanding into such recess upon a righthand rotation of such riser;
• and
• said connecting means including a nut reciprocably mounted on said tubular portion and means for reciprocating said nut;
• said nut rising upon the righthand rotation of such riser forcing said latch to expand into engagement with such casing hanger.

A well tool for tying back a riser with a casing hanger, comprising:

• a tubular portion having a supporting sleeve;
• means for attaching such riser to said tubular portion;
• and
• connecting means for connecting said tubular portion and such casing hanger;
• said connecting means including-
• an expandable latch expandable into a recess in such casing hanger,
• a nut reciprocably mounted in splined relationship on said tubular portion;
• means for reciprocating said nut, said nut rising upon the righthand rotation of such riser, and
• means actuated by the rising of said nut for forcing said expandable latch to expand by camming said expandable latch onto said supporting sleeve, whereby said expandable latch engages such casing hanger.

A well tool for tying back a riser with a casing hanger comprising:

• a supporting sleeve including means for supporting a first retractable latch into engagement with such casing hanger;
• a mandrel reciprocably mounted within said supporting sleeve;
• said mandrel having a second retractable latch including means for supporting said supporting sleeve in an upper position with respect to said mandrel;
• holding means for holding said second retractable latch in position to support said supporting sleeve;
• a releasing sleeve reciprocably mounted within said supporting sleeve and said mandrel for releasing said holding means;
• said releasing sleeve having a sheer pin supporting said releasing sleeve in an upper position with respect to said mandrel;
• and
• shearing means for shearing said shear pin whereby upon shearing said pin, said releasing sleeve moves downward thereby releasing said holding means and retracting said second retractable latch thereby permitting said supporting sleeve to move upward with respect to said mandrel and remove the support from said first retractable latch to release its engagement with such casing hanger.

A well tool for coupling a handling pipe and a casing hanger, comprising:

• a tubular portion;
• means for attaching such handling pipe to said tubular portion;
• and
• connecting means for connecting said tubular portion and such casing hanger upon a rotation of handling pipe;
• said connecting means including-
• a latch expandable into a recess in such casing hanger, and
• a first nut reciprocably mounted on said tubular portion, and
• means for reciprocating said first nut for expanding said latch upon a rotation of such handling pipe;
• said first nut having an anti-rotation means to prevent said first nut from rotating with said tubular portion.

A casing hanger for suspending conduit from an outer casing head and for releasable attachment to a first riser having first joints and then to a second riser having second joints comprising:

• a tubular body;
• means for suspending the conduit from said tubular body;
• support means for landing and supporting the casing hanger from the casing head;
• attaching means for disconnecting a first riser from said tubular body and for connecting a second riser to said tubular body, said tubular body being in fluid tight flow communication with the first riser and the second riser, said attaching means including means for actuation by a rotation of the risers, said attaching means being located on the interior of said tubular body, and the risers engaging said attaching means telescopically, said attaching means including
• means for disconnecting the first riser from said tubular body upon a rotation of the first riser, in a direction which causes such first joints to tighten;
• and
• means for connecting the second riser to said tubular body upon a rotation of the second riser, in a direction which causes such second joints to tighten.

A casing hanger for suspending conduit from an outer casing head and for releasable attachment to a first riser and then to a second riser comprising:

• a tubular body;
• means for suspending the conduit from said tubular body;
• attaching means for disconnecting a first riser from said tubular body and for connecting a second riser to said tubular body, said tubular body being in fluid tight flow communication with the first riser and the second riser, said attaching means including means for actuation by a rotation of the risers, said attaching means being located on the interior of said tubular body, and the risers engaging said attaching means telescopically, said attaching means being actuated by a rotation of the riser in a particular same direction both to disconnect the first riser from said tubular body and to connect the second riser to said tubular body;
• support means for landing and supporting the casing hanger from the casing head independent of lateral support other than from the casing head.

An apparatus for supporting conduit and for connecting such conduit to handling pipe having righthand rotated engageable connections, comprising:

• a first well tool having means for attaching to such handling pipe;
• a casing hanger having a tubular body;
• said casing hanger having means for supporting such conduit from said tubular body;
• fastening means for unfastening said well tool from said casing hanger;
• said fastening means permitting the unfastening of said first well tool from said tubular body upon a righthand rotation of such handling pipe;
• a second well tool having means for attaching to such handling pipe;
• and connecting means for connecting said second well tool to said casing hanger;
• said connecting means permitting the connecting of said second well tool to said casing hanger upon a righthand rotation of such handling pipe and said connecting means being reciprocably mounted on said tubular portion;
• and
• said second well tool having means for sealingly engaging the casing hanger by the weight of the handling string.

A well tool for coupling a handling pipe and a casing hanger which has internal threads comprising:

• a tubular portion;
• means for attaching such handling pipe to said tubular portion;
• connecting means for connecting said tubular portion and such casing hanger including a reciprocably mounted nut splined to the outer surface of said tubular portion, said nut having external threads threadingly engageable with such internal threads of such casing hanger whereby upon the rotation of said tubular portion said nut rotates with respect to said internal threads causing said external threads and said internal threads to disengage until the well tool disengages from such casing hanger;
• means for releasing any fluid pressure caused by the reciprocation of said nut;
• and
• means for sealing the connection between said tubular portion and such handling pipe.

A well tool for tying back a riser with a casing hanger comprising:

• supporting means for supporting a first retractable latch into engagement with such casing hanger;
• holding means for holding a second retractable latch in position to support said supporting means whereby said supporting means supports said first retractable latch;
• releasing means for releasing said holding means thereby permitting said holding means to release said second retractable latch permitting said supporting means to be released thereby releasing said first retractable latch disengaging said well tool from the casing hanger;
• and
• shearing means for activating said releasing means.

A well tool, for coupling a handling pipe and a casing hanger, comprising:

• a tubular portion;
• means on said tubular portion for attaching the handling pipe to said tubular portion;
• connecting means on said tubular portion for connecting said tubular portion and the casing hanger;
• and
• sealing means on said tubular portion for sealingly engaging the well tool to the casing hanger upon lifting the handling pipe.

A well tool, for coupling a handling pipe with a first casing hanger, the first casing hanger resting on a second casing hanger, comprising:

• a tubular portion;
• means on said tubular portion for attaching the handling pipe to said tubular portion;
• connecting means on said tubular portion for connecting said tubular portion and the first casing hanger;
• sealing means on said tubular portion for sealingly engaging the well tool to the first casing hanger;
• and
• port and seal means on said tubular portion for washing the annulus between the well tool and the second casing hanger without passing any fluid around said sealing means.

A well tool for engaging a casing hanger onto a casing head within a well by means of a handling string comprising:

• a tubular portion telescopingly engaging the casing hanger;
• landing means disposed on said tubular portion for landing said tubular portion within such casing hanger;
• means for attaching such handling string to said tubular portion;
• connecting means independent of said landing means disposed on said tubular portion and connecting said tubular portion and such casing hanger;
• sealing means mounted on said tubular portion for sealing engagement of said tubular portion with such casing hanger;
• and
• means for permitting said tubular portion to rotate about its axis after sealing engagement of said sealing means with such casing hanger without movement of said sealing means.

A casing hanger for suspending conduit from an outer casing head and for releaseable attachment to a first riser having first joints and then to a second riser having second joints comprising:

• a tubular body;
• means for suspending the conduit from said tubular body;
• support means for landing and supporting the casing hanger from the casing head;
• landing means disposed on said tubular body for landing such risers;
• attaching means independent of said landing means for disconnecting a first riser from said tubular body and for connecting a second riser to said tubular body, said tubular body being in fluid tight flow communication with the first riser and the second riser, said attaching means including means for actuation by a rotation of the risers, said attaching means being located on the interior of said tubular body, and the risers engaging said attaching means telescopically, said attaching means including
• means for disconnecting the first riser from said tubular body upon a rotation of the first riser, in a direction which causes such first joints to tighten and for connecting the second riser to said tubular body upon a rotation of the second riser, in a direction which causes such second joints to tighten.