US4046405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Run-in and tie back apparatus
Assignee: Cooper Industries LLC
•
Filing: 1975-01-22
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Granted: 1977-09-06
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Expires: 1995-01-22
Abstract
Abstract The described invention includes method and apparatus for the installation of a casing hanger supporting a string of casing down hole in an oil or gas well, for removal of the installation equipment, and for tying back the hanger to an insulated production riser extending to the surface. The casing hanger is lowered into the well on drilling casing, having a smaller outside diameter than the insulated production riser casing, to permit a sufficiently large annulus for the passage of fluid between the drilling riser and the previously installed drilling riser. The drilling riser is removed by disconnecting it from the hanger by clockwise rotation of the drilling riser. The insulated production riser casing, or other special riser pipe, having a larger outside diameter than the drilling riser casing, is used to tie back with the hanger where standard riser casing is not suitable for the production of oil or gas, e.g. in the case of production through permafrost, by a clockwise rotation of the drilling riser. Clockwise rotation is used both to disconnect the drilling riser and to connect the production riser. To perform these operations three preferred embodiments of the invention are described: one having two threaded connections, a second having a threaded connection and a latching mechanism, and a third having a latching mechanism for both operations. All threaded connections and latching mechanisms include an axially sliding nut.
Inventors
- 👤 James Vaull Bonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:56
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/10; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043; E21B36/00; E21B36/003
Claims Analysis
Total Claims: 80
Claim 1
Independent Claim
145 words
A casing hanger in combination with a second tool for supporting conduit and for connecting such conduit to a riser having righthand rotated engageable connections, comprising: a tubular body; means for supporting such conduit from said tubular body; fastening means for unfastening a first tool attached to such riser from said tubular body; said fastening means permitting the unfastening of said first tool from said tubular body upon a righthand rotation of such riser; connecting means for connecting a second tool attached to such riser to said tubular body; said connecting means permitting the connecting of said second tool to said tubular body upon a righthand rotation of such riser, and said second tool including means for disconnecting said second tool from said connecting means upon a downward force on a portion of said second tool and then an upward lift on said second tool.
Claim 2
Dependent Claim
145 words
A casing hanger in combination with a second tool for supporting conduit and for connecting such conduit to a riser having righthand rotated engageable connections, comprising: a tubular body; means for supporting such conduit from said tubular body; fastening means for unfastening a first tool attached to such riser from said tubular body; said fastening means permitting the unfastening of said first tool from said tubular body upon a righthand rotation of such riser; connecting means for connecting a second tool attached to such riser to said tubular body; said connecting means permitting the connecting of said second tool to said tubular body upon a righthand rotation of such riser, and said second tool including means for disconnecting said second tool from said connecting means upon a downward force on a portion of said second tool and then an upward lift on said second tool.
Claim 3
Independent Claim
172 words
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.
Claim 4
Independent Claim
172 words
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.
Claim 5
Independent Claim
142 words
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.
Claim 6
Independent Claim
142 words
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.
Claim 7
Dependent Claim
218 words
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.
Claim 8
Dependent Claim
218 words
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.
Claim 9
Dependent Claim
23 words
A well tool according to claim 4 wherein said sealing means includes means for rotatably mounting said sealing means to said tubular portion.
Claim 10
Dependent Claim
36 words
A well tool according to claim 5 further comprising: means for sealing the connection between said tubular portion and such handling pipe; and means for releasing any fluid pressure caused by the reciprocation of said nut.
Claim 11
Dependent Claim
123 words
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.
Claim 12
Dependent Claim
123 words
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.
Claim 13
Dependent Claim
70 words
A well tool according to claim 7 wherein said sealing means includes: an upper ring; a lower ring; said lower ring being reciprocably mounted relative to said upper ring; a seal for sealingly engaging such casing hanger; said seal being positioned between said upper ring and said lower ring and being compressed into sealing engagement with such casing hanger upon the connection of the casing head and such casing hanger.
Claim 14
Dependent Claim
22 words
A well tool according to claim 8 wherein said upper ring is rotatably mounted on said tubular portion by thrust bearing means.
Claim 15
Dependent Claim
37 words
A well tool according to claim 9 wherein said lower ring reciprocates against said seal upon the connecting of the casing head and such casing hanger thereby compressing said seal into sealing engagement with such casing hanger.
Claim 16
Dependent Claim
119 words
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.
Claim 17
Dependent Claim
119 words
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.
Claim 18
Dependent Claim
40 words
A well tool according to claim 11 further including means affixed to said tubular portion for camming said expandable latch into an expanded position as said nut rises and forces said latch upward upon the righthand rotation of such riser.
Claim 19
Dependent Claim
43 words
A well tool according to claim 12 wherein said nut has internal lefthand threads engageable with external threads on said tubular portion and said nut has means for preventing its rotation as said tubular portion rotates with the righthand rotation of such riser.
Claim 20
Dependent Claim
23 words
A well tool according to claim 13 further including means rotatably mounted on said tubular portion for sealing engagement with such casing hanger.
Claim 21
Dependent Claim
26 words
A well tool according to claim 14 further including means for permitting said expanded latch to retract thereby disconnecting said well tool from such casing hanger.
Claim 22
Dependent Claim
70 words
A well tool according to claim 15 wherein said sealing means includes: an upper ring; a lower ring; said lower ring being reciprocably mounted relative to said upper ring; a seal for sealingly engaging such casing hanger; said seal being positioned between said upper ring and said lower ring and being compressed into sealing engagement with such casing hanger upon the connecting of the well head and such casing hanger.
Claim 23
Dependent Claim
33 words
A well tool according to claim 16 wherein said upper ring and said nut are provided with means forming releasable clutch which when engaged prevents said nut from rotating with said tubular portion.
Claim 24
Dependent Claim
115 words
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.
Claim 25
Dependent Claim
115 words
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.
Claim 26
Dependent Claim
150 words
A well tool according to claim 18 wherein said tubular portion further includes: a mandrel reciprocably mounted within said supporting sleeve; said mandrel having a retractable latch for supporting said mandrel in an upper position with respect to said supporting sleeve; a releasing sleeve reciprocably mounted within said supporting sleeve and said mandrel; said releasing sleeve having a shear pin supporting said releasing sleeve in an upper position with respect to said mandrel; said releasing sleeve biasing said retractable latch into its supporting position with respect to said mandrel so long as said releasing sleeve remains in its upper position; and means for shearing said shear pin whereby upon shearing said pin, said releasing sleeve moves downward retracting said retractable latch thereby permitting said supporting sleeve to move upward with respect to said mandrel and remove the support from said expandable latch to release its engagement with such casing hanger.
Claim 27
Dependent Claim
172 words
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.
Claim 28
Dependent Claim
172 words
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.
Claim 29
Dependent Claim
43 words
A well tool according to claim 20 wherein there is further included a special tool stabbed into said well tool and having engaging means for engaging said shearing means whereby said special tool forces said releasing means downwardly to shear said shear pin.
Claim 30
Dependent Claim
38 words
A well tool according to claim 21 wherein said engaging means includes spring biased dogs reciprocably mounted in recesses in the outer surface of said special tool; said releasing sleeve having recesses for receiving said spring biased dogs.
Claim 31
Dependent Claim
46 words
A well tool according to claim 22 wherein said dogs have beveled upper surfaces for camming said dogs inwardly upon an upward movement of said special tool thereby disconnecting said special tool from said well tool whereby said well tool may be removed from the well.
Claim 32
Dependent Claim
104 words
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.
Claim 33
Dependent Claim
104 words
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.
Claim 34
Dependent Claim
88 words
A well tool according to claim 24 for use with such handling pipe that has connections engageable upon righthand rotation of such handling pipe, wherein said first nut has lefthand threads engageable with other threads mounted on said tubular portion; said first nut biasing said latch against a cam surface mounted on said tubular portion such that upon the righthand rotation of the handling pipe said first nut rises and cams said latch onto said cam surface thereby expanding said latch into the recess of such casing hanger.
Claim 35
Dependent Claim
85 words
A well tool according to claim 25 wherein said other threads are mounted on said tubular portion by means of a second nut; said second nut forming a clutch connection with said tubular portion to translate the rotation of said tubular portion to said second nut and said other threads; said cam surface being on an end of said second nut for expanding said latch as said first nut biases said latch against said cam surface and for supporting said latch in its expanded position.
Claim 36
Dependent Claim
53 words
A well tool according to claim 26 further including means biasing said first nut into engagement with said second nut thereby causing said first nut to rise with respect to said tubular portion as said lefthand threads engage said other threads of said second nut upon the righthand rotation of such handling pipe.
Claim 37
Dependent Claim
16 words
A well tool according to claim 27 further including means for sealingly engaging such casing hanger.
Claim 38
Dependent Claim
70 words
A well tool according to claim 28 wherein said sealing means includes a ring splined to the outer surface of said tubular portion and a seal sandwiched between a lower shoulder on said tubular portion and said ring whereby upon lifting such handling pipe said ring engages said first nut thereby compressing said seal between said ring and said shoulder thereby causing said seal to sealingly engage such casing hanger.
Claim 39
Dependent Claim
64 words
A well tool according to claim 29 wherein said ring and said first nut are provided with means that forms a clutch connection with said first nut upon lifting such handling pipe and wherein said second nut disengages the clutch connection with said tubular portion thus adapting said first nut to rotate with said tubular portion and permitting said second nut to remain stationary.
Claim 40
Dependent Claim
36 words
A well tool according to claim 30 wherein said second nut includes an anti-rotation means to prevent said second nut from rotating with said tubular portion upon disengagement of the clutch connection with said tubular portion.
Claim 41
Dependent Claim
38 words
A well tool according to claim 31 wherein said anti-rotation means includes a drag plug reciprocably mounted in a recess in said second nut; said drag plug being biased outwardly against such casing hanger by a biasing means.
Claim 42
Dependent Claim
39 words
A well tool according to claim 32 wherein said well tool is disconnected by a righthand rotation of such handling pipe causing said second nut to rise thereby removing the support for said latch causing said latch to retract.
Claim 43
Dependent Claim
187 words
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.
Claim 44
Dependent Claim
187 words
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.
Claim 45
Dependent Claim
28 words
A casing hanger according to claim 34 further including vent means for discharging any fluid in said attaching means while disconnecting the first riser from said tubular body.
Claim 46
Dependent Claim
159 words
A casing hanger according to claim 35 wherein said vent means comprises: hole means through said tubular body for venting liquids from the interior of said tubular body to the outside of said tubular body, said hole means being located above said attaching means; sealing means for fluid tight connection with said hole means when the pressure on the outside of said tubular body is greater than the pressure on the interior of said tubular body; and annulus means on the outer surface of said tubular body for holding said sealing means in fluid tight connection with said hole means when the pressure on the outside of said tubular body is greater than the pressure on the interior of said tubular body, said annulus means being located approximately in the same plane as said hole means so as to permit complete coverage of said hole means by said sealing means, and said sealing means fitting into said annulus means.
Claim 47
Dependent Claim
168 words
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.
Claim 48
Dependent Claim
168 words
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.
Claim 49
Dependent Claim
39 words
A casing hanger according to claim 34 wherein said attaching means includes means for disconnecting said first riser from said tubular body and connecting said second riser to said tubular body by threaded connection to engage said attaching means.
Claim 50
Dependent Claim
44 words
A casing hanger according to claim 34 in combination with said second riser including means for disconnecting said second riser from said attaching means upon a downward force on a portion of said second riser and then an upward lift on said second riser.
Claim 51
Independent Claim
164 words
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.
Claim 52
Independent Claim
164 words
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.
Claim 53
Dependent Claim
133 words
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.
Claim 54
Dependent Claim
133 words
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.
Claim 55
Dependent Claim
85 words
A well tool according to claim 41 wherein: the handling pipe has external threads; said means for sealing the connection between said tubular portion and the handling pipe includes- thread connection means for sealing the connection between the handling pipe and said tubular portion, said thread connection means being connected on the outside of said tubular portion; and O-ring means for sealing the connection between the handling pipe and said tubular portion from the casing hanger, said O-ring means sealingly connected to the casing hanger.
Claim 56
Dependent Claim
98 words
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.
Claim 57
Dependent Claim
98 words
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.
Claim 58
Dependent Claim
67 words
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.
Claim 59
Dependent Claim
67 words
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.
Claim 60
Dependent Claim
104 words
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.
Claim 61
Dependent Claim
104 words
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.
Claim 62
Dependent Claim
113 words
A well apparatus for supporting conduit on an outer casing head and for connecting the conduit to a production riser comprising: a casing hanger having means for supporting the conduit; a first well tool having landing means for landing said first well tool within said casing hanger, connecting means independent of said landing means for connecting said first well tool to said casing hanger means upon rotation of said well tool for lowering said casing hanger onto the casing head and for disconnection of said well tool upon opposite rotation, and prevention means for preventing the exposure of said connecting means to any material flowing between said casing hanger and the casing head.
Claim 63
Dependent Claim
113 words
A well apparatus for supporting conduit on an outer casing head and for connecting the conduit to a production riser comprising: a casing hanger having means for supporting the conduit; a first well tool having landing means for landing said first well tool within said casing hanger, connecting means independent of said landing means for connecting said first well tool to said casing hanger means upon rotation of said well tool for lowering said casing hanger onto the casing head and for disconnection of said well tool upon opposite rotation, and prevention means for preventing the exposure of said connecting means to any material flowing between said casing hanger and the casing head.
Claim 64
Dependent Claim
38 words
A well apparatus according to claim 46 wherein said casing hanger and first well tool form an annual chamber between said casing hanger and first well tool after said first well tool is inserted into said casing hanger.
Claim 65
Dependent Claim
65 words
A well apparatus according to claim 47 wherein said casing hanger includes first internal threads within said annular chamber and said connecting means includes a first nut reciprocably mounted on said first well tool within said annular chamber and having external threads engageable with said first internal threads upon rotation of said first well tool and disengageable upon opposite rotation of said first well tool.
Claim 66
Dependent Claim
28 words
A well apparatus according to claim 48 wherein said casing hanger includes vent means for venting any fluid within said annular chamber upon the reciprocation of said nut.
Claim 67
Dependent Claim
48 words
A well apparatus according to claim 47 wherein said first well tool further includes sealing means rotatably mounted on said first well tool for sealing engagement with said casing hanger to seal one end of said annular chamber upon landing said first well tool within said casing hanger.
Claim 68
Dependent Claim
26 words
A well apparatus according to claim 47 wherein said first well tool further includes plug means for plugging and sealing one end of said annular chamber.
Claim 69
Dependent Claim
37 words
A well apparatus according to claim 46 wherein said first well tool further includes washout means for transmitting fluid from the interior of said first well tool to the annulus between the casing hanger and casing head.
Claim 70
Dependent Claim
96 words
A well apparatus according to claim 46 further including a second well tool attached to a production riser and having support means for landing said second well tool within said casing hanger, attaching means independent of said support means for connecting said second well tool to said casing hanger upon rotation of said second well tool in the same direction as said first well tool was rotated for disconnection from said casing hanger, and prevention means for preventing the exposure of said attaching means to any material flowing between said casing hanger and the casing head.
Claim 71
Dependent Claim
38 words
A well apparatus according to claim 53 wherein said casing hanger and second well tool form an annular chamber between said casing hanger and second well tool after said second well tool is inserted into said casing hanger.
Claim 72
Dependent Claim
69 words
A well apparatus according to claim 54 wherein said casing hanger includes second internal threads within said annular chamber and said attaching means includes a second nut reciprocably mounted on said second well tool within said annular chamber and having external threads engageable with said second internal threads upon rotation of said second well tool in the direction used to disengage said first well tool from said casing hanger.
Claim 73
Dependent Claim
24 words
A well apparatus according to claim 55 wherein said second internal threads have a diameter greater than the diameter of said first internal threads.
Claim 74
Dependent Claim
48 words
A well apparatus according to claim 54 wherein said second well tool further includes sealing means rotatably mounted on said second well tool for sealing engagement with said casing hanger to seal one end of said annular chamber upon landing said second well tool within said casing hanger.
Claim 75
Dependent Claim
26 words
A well apparatus according to claim 54 wherein said second well tool further includes plug means for plugging and sealing one end of said annular chamber.
Claim 76
Dependent Claim
124 words
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.
Claim 77
Dependent Claim
124 words
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.
Claim 78
Dependent Claim
13 words
A well tool according to claim 7 also including a wash out port.
Claim 79
Dependent Claim
202 words
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.
Claim 80
Dependent Claim
202 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |