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A well tool adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs. The well tool includes a tubular mandrel. The tubular ma

A well tool adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs. The well tool includes a tubular mandrel. The tubular mandrel has a maximum mandrel diameter which is no greater than the maximum clearance diameter. The tubular mandrel includes a first mandrel connector which is adapted for connecting the tubular mandrel with a first well tubing in order to provide a first connection. The tubular mandrel is configured so that when the power tong device grips a tong gripping surface on the tubular mandrel and the first well tubing in order to connect the tubular mandrel and the first well tubing, the first connection is located within the gripping span.

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1. A tubing hanger adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs, the tubing hanger comprising: a tubular mandrel h

1. A tubing hanger adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs, the tubing hanger comprising: a tubular mandrel having a first mandrel end, a second mandrel end, an external mandrel surface, a maximum mandrel diameter less than said maximum clearance diameter, and defining a mandrel bore, wherein the tubular mandrel comprises a first mandrel connector and a second mandrel connector, the first mandrel connector located at the first mandrel end which is adapted for connecting the tubular mandrel with a well tubing in order to provide a first connection between the tubular mandrel and the well tubing, wherein the external mandrel surface defines a tong gripping surface having a gripping surface length and the tong gripping surface is located between the first mandrel end and the second mandrel end, wherein the tubular mandrel is configured so that when the tong gripping surface and the well tubing are gripped by the power tong device in order to connect the tubular mandrel with the well tubing the first connection is located within the gripping span, wherein the tong gripping surface is clear of external and internal treading along the length of the tong gripping surface;a tubular shell having a first shell end, a second shell end, and defining a shell bore for receiving the tubular mandrel therein, wherein the tubular shell has an external shell surface, wherein the external shell surface defines a tubing head engagement surface which is adapted to engage a tubing head, wherein the tubular shell comprises a shell connector for connecting with the second mandrel connector in order to provide a second connection between the tubular mandrel and the tubular shell, and wherein the first mandrel end and the tong gripping surface extend from the first shell end when the tubular mandrel is received in the shell bore and the tubular mandrel is connected with the tubular shell; anda recess associated with the tubular mandrel and a lug associated with the tubular shell, wherein the lug is movable into engagement with the recess when the tubular mandrel and the tubular shell are connected with each other at a desired relative position in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 2. The tubing hanger as claimed in claim 1, wherein the lug comprises a set screw threadably associated with the tubular shell, and wherein the set screw is movable into engagement with the recess in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 3. The tubing hanger as claimed in claim 1, wherein the first mandrel connector is a threaded connector so that the first connection is a first threaded connection, wherein the second connection is a second threaded connection, and wherein the first threaded connection and the second threaded connection are threaded in opposite directions. 4. The tubing hanger as claimed in claim 1, wherein each of the tongs in the pair of tongs has a tong length, and wherein the gripping surface length is greater than the tong length. 5. The tubing hanger as claimed in claim 1, further comprising a shell seal device associated with the external shell surface, for providing a seal between the tubular shell and the tubing head. 6. The tubing hanger as claimed in claim 5, further comprising a mandrel seal device associated with at least one of the external mandrel surface and the shell bore, for providing a seal between the tubular mandrel and the tubular shell. 7. The tubing hanger as claimed in claim 1, wherein the first mandrel connector comprises a threaded connector. 8. The tubing hanger as claimed in claim 7, wherein the first mandrel connector comprises an external upset end (EUE) pin connector. 9. The tubing hanger as claimed in claim 7, wherein the second connection comprises a second threaded connection. 10. The tubing hanger as claimed in claim 9, wherein the second mandrel connector comprises a pin connector defined by the external mandrel surface and wherein the shell connector comprises a box connector defined by the shell bore. 11. The tubing hanger as claimed in claim 1, wherein the tubular mandrel is further comprised of a third mandrel connector located at the second mandrel end which is adapted for connecting the tubular mandrel with a lifting member in order to connect the tubular mandrel and the lifting member. 12. The tubing hanger as claimed in claim 11, wherein the third mandrel connector comprises a threaded connector. 13. The tubing hanger as claimed in claim 12, wherein the third mandrel connector comprises an external upset end (EUE) box connector. 14. The tubing hanger as claimed in claim 1, wherein the maximum clearance diameter is 6 inches and the maximum mandrel diameter is less than 6 inches. 15. The tubing hanger as claimed in claim 1, wherein the maximum clearance diameter is 5 inches and the maximum mandrel diameter is less than 5 inches. 16. The tubing hanger as claimed in claim 1, wherein the gripping span is 11 inches. 17. The tubing hanger as claimed in claim 1, wherein the tong gripping surface has a first gripping surface end and a second gripping surface end, wherein the first gripping surface end is between the first mandrel end and the second gripping surface end, wherein the tubular mandrel has a first span length between the first gripping surface end and the first mandrel end, and wherein the first span length is no greater than 8 inches. 18. The tubing hanger as claimed in claim 1, in which the gripping surface length is 6 inches. 19. A tubing hanger adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs, the tubing hanger comprising: a tubular mandrel having a first connector end, a second connector end, an external mandrel surface, a maximum mandrel diameter less than said maximum clearance diameter, and defining a mandrel bore, wherein the tubular mandrel comprises a first mandrel connector located at the first mandrel end which is adapted for connecting the tubular mandrel with a well tubing in order to provide a first connection between the tubular mandrel and the well tubing, wherein the external mandrel surface defines a tong gripping surface located between the first mandrel end and the second mandrel end, wherein the tubular mandrel is configured so that when the tong gripping surface and the well tubing are gripped by the power tong device in order to connect the tubular mandrel with the well tubing the first connection is located within the gripping span, and wherein the tubular mandrel has a second mandrel connector;a tubular shell having a first shell end, a second shell end, and defining a shell bore extending through said tubular shell between said first shell end and said second shell end, said shell bore being sized and shaped to receive said first connector end of said tubular mandrel within said bore, wherein the tubular shell has an external shell surface, wherein the external shell surface defines a tubing head engagement surface which is adapted to engage a tubing head, wherein the tubular shell comprises a shell connector for connecting with the second mandrel connector in order to provide a second connection between the tubular mandrel and the tubular shell, and wherein the first mandrel end and the tong gripping surface extend from the first shell end when the tubular mandrel is received in the shell bore and the tubular mandrel is connected with the tubular shell; anda recess positioned in the tubular mandrel and and a movable lug positioned in, and movable relative to, the tubular shell, wherein the lug is movable into engagement with the recess when the tubular mandrel and the tubular shell are connected with each other at a desired relative position in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 20. The tubing hanger as claimed in claim 19, wherein the lug comprises a set screw threadably associated with the tubular shell, and wherein the set screw is movable into engagement with the recess in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 21. The tubing hanger as claimed in claim 19, wherein the first mandrel connector is a threaded connector so that the first connection is a first threaded connection, wherein the second connection is a second threaded connection, and wherein the first threaded connection and the second threaded connection are threaded in opposite directions. 22. The tubing hanger as claimed in claim 19, wherein each of the tongs in the pair of tongs has a tong length, wherein the tong gripping surface has a gripping suffice length, and wherein the gripping surface length is greater than the tong length. 23. The tubing hanger as claimed in claim 19, further comprising a shell seal device associated with the external shell surface, for providing a seal between the tubular shell and the tubing head. 24. The tubing hanger as claimed in claim 23, further comprising a mandrel seal device associated with at least one of the external mandrel surface and the shell bore, for providing a seal between the tubular mandrel and the tubular shell. 25. The tubing hanger as claimed in claim 19, wherein the first mandrel connector comprises a threaded connector. 26. The tubing hanger as claimed in claim 25, wherein the first mandrel connector comprises an external upset end (EUE) pin connector. 27. The tubing hanger as claimed claim 25, wherein the second connection comprises a second threaded connection. 28. The tubing hanger as claimed in claim 27, wherein the second mandrel connector comprises a pin connector defined by the external mandrel surface and wherein the shell connector comprises a box connector defined by the shell bore. 29. The tubing hanger as claimed in claim 19, wherein the tubular mandrel is further comprised of a third mandrel connector located at the second mandrel end which is adapted for connecting the tubular mandrel with a lifting member in order to provide a third connection between the tubular mandrel and the lifting member. 30. The tubing hanger as claimed in claim 29, wherein the third mandrel connector comprises a threaded connector. 31. The tubing hanger as claimed in claim 30, wherein the third mandrel connector comprises an external upset end (EUE) box connector. 32. The tubing hanger as claimed in claim 19, wherein the maximum clearance diameter is 6 inches and the maximum mandrel diameter is less than 6 inches. 33. The tubing hanger as claimed in claim 32, wherein the maximum clearance diameter is 5 inches and the maximum mandrel diameter is less than 5 inches. 34. The tubing hanger as claimed in claim 19, wherein the gripping span is 11 inches. 35. The tubing hanger as claimed in claim 19, wherein the tong gripping surface has a gripping surface length, and the gripping surface length is greater than 4 inches and no greater than 15 inches. 36. The tubing hanger as claimed in claim 35, wherein the gripping surface length is 6 inches. 37. The tubing hanger as claimed in claim 19, wherein the tong gripping surface has a first gripping surface end and a second gripping surface end, wherein the first gripping surface end is between the first mandrel end and the second gripping surface end, wherein the tubular mandrel has a first span length between the first gripping surface end and the first mandrel end, and wherein the first span length is no greater than 8 inches. 38. A tubing hanger adapted to be connected with and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs, the tubing hanger comprising: a tubular mandrel having a first mandrel end, a second mandrel end, an external mandrel surface, a maximum mandrel diameter less than said maximum clearance diameter, and defining a mandrel bore, wherein the tubular mandrel comprises a first mandrel connector and a second mandrel connector, the first mandrel connector located at the first mandrel end which is adapted for connecting the tubular mandrel with a well tubing in order to provide a first connection between the tubular mandrel and the well tubing, wherein the external mandrel surface defines a tong gripping surface located between the first mandrel end and the second mandrel end, wherein the tubular mandrel is configured so that when the tong gripping surface and the well tubing are gripped by the power tong device in order to connect the tubular mandrel with the well tubing the first connection is located within the gripping span, wherein the tong gripping surface includes at least a portion which extends towards the other of said connector ends across a midpoint between said mandrel ends;a tubular shell having a first shell end, a second shell end, and defining a shell bore for receiving the tubular mandrel therein, wherein the tubular shell has an external shell surface, wherein the external shell surface defines a tubing head engagement surface which is adapted to engage a tubing head, wherein the tubular shell comprises a shell connector for connecting with the second mandrel connector in order to provide a second connection between the tubular mandrel and the tubular shell, and wherein the first mandrel end and the tong gripping surface extend from the first shell end when the tubular mandrel is received in the shell bore and the tubular mandrel is connected with the tubular shell; anda recess associated with the tubular mandrel and a lug associated with the tubular shell, wherein the lug is movable into engagement with the recess when the tubular mandrel and the tubular shell are connected with each other at a desired relative position in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 39. The tubing hanger as claimed in claim 38, wherein the lug comprises a set screw threadably associated with the tubular shell, and wherein the set screw is movable into engagement with the recess in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 40. The tubing hanger as claimed in claim 38, wherein the first mandrel connector is a threaded connector so that the first connection is a first threaded connection, wherein the second connection is a second threaded connection, and wherein the first threaded connection and the second threaded connection are threaded in opposite directions. 41. The tubing hanger as claimed in claim 38, wherein each of the tongs in the pair of tongs has a tong length, wherein the tong gripping surface has a gripping surface length, and wherein the gripping surface length is greater than the tong length. 42. The tubing hanger as claimed in claim 38, further comprising a shell seal device associated with the external shell surface, for providing a seal between the tubular shell and the tubing head. 43. The tubing hanger as claimed in claim 42, further comprising a mandrel seal device associated with at least one of the external mandrel surface and the shell bore, for providing a seal between the tubular mandrel and the tubular shell. 44. The tubing hanger as claimed in claim 38, wherein the first mandrel connector comprises a threaded connector. 45. The tubing hanger as claimed in claim 44, wherein the first mandrel connector comprises an external upset end (EUE) pin connector. 46. The tubing hanger as claimed claim 44, wherein the second connection comprises a second threaded connection. 47. The tubing hanger as claimed in claim 46, wherein the second mandrel connector comprises a pin connector defined by the external mandrel surface and wherein the shell connector comprises a box connector defined by the shell bore. 48. The tubing hanger as claimed in claim 38, wherein the tubular mandrel is further comprised of a third mandrel connector located at the second mandrel end which is adapted for connecting the tubular mandrel with a lifting member in order to provide a third connection between the tubular mandrel and the lifting member. 49. The tubing hanger as claimed in claim 48, wherein the third mandrel connector comprises a threaded connector. 50. The tubing hanger as claimed in claim 49, wherein the third mandrel connector comprises an external upset end (EUE) box connector. 51. The tubing hanger as claimed in claim 38, wherein the maximum clearance diameter is 6 inches and the maximum mandrel diameter is less than 6 inches. 52. The tubing hanger as claimed in claim 51, wherein the maximum clearance diameter is 5 inches and the maximum mandrel diameter is less than 5 inches. 53. The tubing hanger as claimed in claim 38, wherein the gripping span is 11 inches. 54. The tubing hanger as claimed in claim 38, in which the tong gripping surface has a gripping surface length, and the gripping surface length is more than 4 inches and no greater than 15 inches. 55. The tubing hanger as claimed in claim 54, in which the gripping surface length is 6 inches. 56. The tubing hanger as claimed in claim 38, wherein the tong gripping surface has a first gripping surface end and a second gripping surface end, wherein the first gripping surface end is between the first mandrel end and the second gripping surface end, wherein the tubular mandrel has a first span length between the first gripping surface end and the first mandrel end, and wherein the first span length is no greater than 8 inches. 57. A method of connecting or disconnecting a tubing hanger to or from a well tubing using a power tong device having a pair of tongs, a gripping span between the upper and lower tongs and a maximum clearance distance for an object passing vertically through the tongs, the method comprising the steps of: providing a tubing hanger having a tubular mandrel, a recess associated with the tubular mandrel, and a tubular shell, the tubular mandrel having a first connection end, a second connection end, a mandrel bore and an external mandrel surface, the external mandrel surface defining a tong gripping surface having a gripping surface length, the tong gripping surface being located between said first and second connection ends;connecting the tubular shell to the second connection end of the tubular mandrel, a lug being associated with the tubular shell;moving the lug into engagement with the recess with the tubular shell connected to the tubular mandrel;providing well tubing adjacent to said tubing hanger;gripping said tubing hanger on said gripping surface with one tong of said pair of tongs while gripping said well tubing with the other tong of said pair of tongs whereby the first connection end is located within said gripping span; andactuating said tongs to rotate said tubing hanger and well tubing relative to one another to connect or disconnect said tubing hanger and well tubing. 58. The method as claimed in claim 57, wherein said well tubing comprises a box connector and said step of gripping said well tubing with the other tong of said pair of tongs comprises gripping said box connector with the other of said pair of tongs. 59. The method as claimed in claim 57, further including the step of positioning one of said tongs on said gripping surface clear of any threaded portion of said connection ends. 60. The method as claimed in claim 57, wherein the tong gripping surface has a first gripping surface end and a second gripping surface end further including the step of gripping said tong gripping surface at said first gripping surface end with said first connection end located in said gripping span. 61. The method as claimed in claim 57, wherein said tubular shell has a first shell end, a second shell end, a shell bore comprising a shell connector adapted to engage the second connection end to provide a connection between said tubular mandrel and said tubular shell, and an external shell surface defining a tubing head engagement surface adapted to engage a tubing head to be supported thereby. 62. The method as claimed in claim 57, wherein the lug comprises a set screw threadably associated with the tubular shell. 63. A two part tubing hanger adapted to be connected to and disconnected from a well tubing using a power tong device having a pair of tongs, a gripping span between the pair of tongs, and a maximum clearance diameter for an object passing through the tongs, the tubing hanger comprising: a first part comprising a tubular mandrel defining a first mandrel end, a second mandrel end, an external mandrel surface between the first and second mandrel ends, a maximum mandrel diameter less than said maximum clearance diameter, and a mandrel bore, the tubular mandrel comprising: a first mandrel connector located at the first mandrel end;a second mandrel connector located between the first mandrel end and the second mandrel end, the first mandrel connector being adapted to engage a matching connector on a well tubing to provide a connection between the tubular mandrel and the well tubing; anda tong gripping surface, defined by the external mandrel surface, that is clear of external and internal threading;wherein the tubular mandrel is configured to permit the power tong device to grip the tong gripping surface and the well tubing within the gripping span and provide the connection between the tubular mandrel and the well tubing;a second part comprising a tubular shell having a first shell end, a second shell end, a shell bore comprising a shell connector adapted to engage the second mandrel connector to provide a connection between the tubular mandrel and the tubular shell, and an external shell surface defining a tubing head engagement surface adapted to engage a tubing head to be supported thereby; anda recess positioned in the tubular mandrel and a movable lug positioned in, and movable relative to, the tubular shell, wherein the lug is movable into engagement with the recess when the tubular mandrel and the tubular shell are connected with each other at a desired relative position in order to maintain the tubular mandrel and the tubular shell at the desired relative position,wherein when the tubular mandrel is connected to the tubular shell the tong gripping surface extends from the first shell end toward the first mandrel end. 64. The two part tubing hanger as claimed in claim 63, wherein said tong gripping surface has a tong gripping length which is greater than 4 inches and no greater than 15 inches. 65. A method of supporting a tubing string comprised of one or more lengths of well tubing within a well bore at a tubing head, said method comprising the steps of: providing a tubular mandrel having a first connection end, a second connection end, a mandrel bore, a recess, and an external mandrel surface, the external mandrel surface defining a tong gripping surface, the tong gripping surface being located between said first and second connection ends;providing a well tubing adjacent to said first connection end of said tubular mandrel;gripping said tubular mandrel on said tong gripping surface with one of a pair of tongs of a power tong device while gripping said well tubing with the other of said pair of tongs, said pair of tongs defining a gripping span therebetween, whereby the first connection end is located within said gripping span;actuating said power tong device to rotate said tubular mandrel and said well tubing relative to one another to connect said tubular mandrel and said well tubing;releasing said pair of tongs from said tubular mandrel and said well tubing;providing a tubular shell having (a) a first shell end, (b) a second shell end, (c) a shell bore extending through said tubular shell between said first shell end and said second shell end, said shell bore being sized and shaped to receive said second connection end of said tubular mandrel within said bore, said bore comprising a shell connector adapted to engage the second connection end to provide a connection between said tubular mandrel and said tubular shell, (d) an external shell surface defining a tubing head engagement surface adapted to engage said tubing head and (e) a lug associated therewith;connecting said tubular shell to said tubular mandrel;moving said lug into engagement with said recess with said tubular shell connected to said tubular mandrel; andallowing a weight of said well tubing to draw said tubing head engagement surface of said tubular shell into engagement with said tubing head to be supported thereby. 66. A two part tubing hanger adapted to support a tubing string comprised of one or more lengths of well tubing within a well bore at a tubing head, the two part tubing hanger comprising: a first part comprising a tubular mandrel defining a first mandrel end, a second mandrel end, an external mandrel surface between the first and second mandrel ends, a maximum mandrel diameter less than a maximum clearance diameter, and a mandrel bore, the tubular mandrel comprising: a first mandrel connector located at the first mandrel end; anda second mandrel connector located between the first mandrel end and the second mandrel end, the first mandrel connector being adapted to engage a matching connector on a well tubing to provide a connection between the tubular mandrel and the well tubing;a second part comprising a tubular shell having (a) a first shell end, (b) a second shell end, (c) a shell bore extending through said tubular shell between said first shell end and said second shell end, said shell bore defining a shell connector adapted to receive said second mandrel connector of said tubular mandrel within said bore and engage said second mandrel connector to provide a connection between the tubular mandrel and the tubular shell, and (d) an external shell surface defining a tubing head engagement surface adapted to engage a tubing head to be supported thereby; anda recess associated with the tubular mandrel and a lug associated with the tubular shell, wherein the lug is movable into engagement with the recess when the tubular mandrel and the tubular shell are connected with each other at a desired relative position in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 67. The two part tubing hanger as claimed in claim 66, wherein the lug comprises a set screw threadably associated with the tubular shell, and wherein the set screw is movable into engagement with the recess in order to maintain the tubular mandrel and the tubular shell at the desired relative position. 68. The two part tubing hanger as claimed in claim 66, further comprising a tong gripping surface, defined by the external mandrel surface, that is clear of external and internal threading; wherein the tubular mandrel is configured to permit a power tong device of the type having a pair of tongs, to grip the tong gripping surface and the well tubing within a gripping span between the pair of tongs, and provide the connection between the tubular mandrel and the well tubing; andwherein when the tubular mandrel is connected to the tubular shell the tong gripping surface extends from the first shell end toward the first mandrel end. 69. A method of using said two part tubing hanger defined in claim 66 to access an annulus between said tubular mandrel and said tubing string, and a wall of the well bore when the two part tubing hanger is connected to said tubing string and supported by said tubing head, said method comprising the steps of: lifting said two part tubing hanger from said tubing head a sufficient height to expose said lug;moving said lug out of engagement with said recess;disconnecting said tubular shell from said tubular mandrel; andlifting said disconnected tubular shell from said tubing head to allow access to said annulus. 70. A method of using said two part tubing hanger defined in claim 66, to release a tubing string stuck in a well bore when the two part tubing hanger is connected to said tubing string and supported by said tubing head, said method comprising the steps of: lifting said two part tubing hanger from said tubing head a sufficient height to expose said lug;moving said lug out of engagement with said recess;disconnecting said tubular shell from said tubular mandrel; andreciprocating said tubular mandrel and said tubing string within said well bore to release said tubing string. 71. The method as claimed in claim 70, further comprising the step of mounting a blowout preventer to said tubing head before said reciprocating step.