Abstract: A tubing hanger assembly for suspending a tubing string into a wellbore comprises a hanger body having a radially outer surface including external threads having a first thread handedness. In addition, the assembly comprises a load ring coaxially disposed about the hanger body. The load ring has a radially inner surface including a first set of internal threads that matingly engage with the external threads of the hanger body and a second set of internal threads having a second thread handedness that is opposite the first thread handedness. The load ring also has a radially outer surface including a frustoconical cam surface. Further, the assembly comprises an expandable ring disposed about the hanger body adjacent the lower end of the load ring. The expandable ring has a radially inner surface including a frustoconical surface that slidingly engages the cam surface.

Abstract: A fluid pressure operated actuator assembly comprising a tubular body (110) having a wall, with an interior surface and an exterior surface and enclosing a main passage (112) which extends generally parallel to a longitudinal axis of the tubular body, an actuator (118) located in and movable along the main passage, a first direction chamber (138a) formed between the wall of the tubular body and the actuator, and at least one second direction chamber (138b, c) formed between the tubular body and the actuator, wherein the assembly is configured such that when the pressure of fluid in the first direction chamber exceeds the pressure of fluid in the or each second direction chamber by a predetermined amount, the pressure of fluid in the first direction chamber exerts a force on the actuator which acts to push the actuator in a first direction relative to the tubular body, and when the pressure of fluid in the or at least one of the second direction chamber(s) exceeds the pressure of fluid in the first direction c

Abstract: A tubing hanger assembly for suspending a tubing string into a wellbore comprises a hanger body having a radially outer surface including external threads having a first thread handedness. In addition, the assembly comprises a load ring coaxially disposed about the hanger body. The load ring has a radially inner surface including a first set of internal threads that matingly engage with the external threads of the hanger body and a second set of internal threads having a second thread handedness that is opposite the first thread handedness. The load ring also has a radially outer surface including a frustoconical cam surface. Further, the assembly comprises an expandable ring disposed about the hanger body adjacent the lower end of the load ring. The expandable ring has a radially inner surface including a frustoconical surface that slidingly engages the cam surface.

Abstract: A tubing hanger assembly for suspending a tubing string into a wellbore comprises a hanger body having a radially outer surface including external threads having a first thread handedness. In addition, the assembly comprises a load ring coaxially disposed about the hanger body. The load ring has a radially inner surface including a first set of internal threads that matingly engage with the external threads of the hanger body and a second set of internal threads having a second thread handedness that is opposite the first thread handedness. The load ring also has a radially outer surface including a frustoconical cam surface. Further, the assembly comprises an expandable ring disposed about the hanger body adjacent the lower end of the load ring. The expandable ring has a radially inner surface including a frustoconical surface that slidingly engages the cam surface.

Abstract: A tubing hanger assembly for suspending a tubing string into a wellbore comprises a hanger body having a radially outer surface including external threads having a first thread handedness. In addition, the assembly comprises a load ring coaxially disposed about the hanger body. The load ring has a radially inner surface including a first set of internal threads that matingly engage with the external threads of the hanger body and a second set of internal threads having a second thread handedness that is opposite the first thread handedness. The load ring also has a radially outer surface including a frustoconical cam surface. Further, the assembly comprises an expandable ring disposed about the hanger body adjacent the lower end of the load ring. The expandable ring has a radially inner surface including a frustoconical surface that slidingly engages the cam surface.