Wellhead connection device and method for reducing axial stresses in a pipe run
AssigneeWerner Hartmann GmbH & Co. KG
InventorsChristian Hartmann, Tim Betschinski
Life of this patent
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Abstract
The invention relates to a wellhead connection device (10) for the top-side connection of a pipe run of a deep well. A wellhead connection device (10) according to the invention has a housing (12), which comprises a through opening (14), and a pipe connection element (36) arranged inside the through opening (14) in the housing (12). The pipe connection element (36) is arranged to be axially displaceable in the housing (12) in order to compensate for axial stresses during normal operation. The invention moreover relates to a method for reducing axial stresses in a pipe run which is firmly connected to a pipe connection element (36) of a wellhead connection device (10).
Claims9
A wellhead connection device (10) for the top-side connection of a pipe run of a deep well, having a housing (12), which comprises a through opening (14), and a pipe connection element (36) arranged inside the through opening (14) in the housing (12), wherein the pipe connection element (36) is arranged to be axially displaceable in the housing (12) in order to compensate for axial stresses during normal operation,
- characterized in that
- a fluid space (46) is provided in the housing (12), functionally interacting with the pipe connection element (36), and is arranged such that the axial position of the pipe connection element (36) during normal operation stands in functional connection with the fluid quantity and/or the fluid pressure in the fluid space (46).
The wellhead connection device (10), characterized in that at least one guide section of the pipe connection element (36) is formed as a radially protruding collar (38) along a portion of the axial length of the pipe connection element (36).
Dependencies are inferred from the claim text.