Well tree hub and interface for retrievable processing modules

A wellhead system comprising:

• a wellhead valve tree;
• a hub connected into the wellhead valve tree by a fluid conduit;
• and
• an interface including the hub and a support structure;
• wherein the interface support structure is configured to receive a fluid processing module;
• wherein the fluid conduit and the hub are configured to fluidly couple the fluid processing module to the wellhead valve tree across the interface;
• wherein the fluid processing module is configured to engage the interface support structure to resist movement of the fluid processing module before engaging the hub for a fluid connection.

A method of connecting a fluid processing module to a wellhead valve tree, the method comprising:

• engaging the fluid processing module with an interface support structure having a support structure and a hub connected into the wellhead valve tree by a fluid conduit;
• resisting movement of the fluid processing module toward the hub;
• and
• engaging the fluid processing module with the hub to fluidly connect the fluid processing module with the wellhead valve tree;
• whereby the fluid processing module is in direct contact with the interface support structure at the hub.