Subsea completion with crossover passage

A system for producing or injecting well fluids with a tubing hanger supporting a tubing string and an annulus surrounding the tubing string, and a subsea tree, the system comprising:

• a spool assembly comprising:
• a longitudinal passage configured to receive and support the tubing hanger;
• and
• a lateral passage extending laterally from the longitudinal passage and configured to transfer the fluids to the subsea tree;
• an annulus flow passage in fluid communication with the annulus;
• and
• a mating hub connection between the spool assembly and the subsea tree comprising:
• a flow connection configured to fluidly connect the lateral passage with a first passage in the subsea tree;
• and
• an annulus flow connection configured to fluidly connect the annulus flow passage with a second passage in the subsea tree.

A system for producing or injecting fluids into a well using a tubing string with an annulus surrounding the tubing string, comprising:

• a subsea tree comprising a tree flow passage and a tree annulus flow passage;
• a spool assembly separate from the subsea tree and comprising:
• a body comprising a spool longitudinal passage;
• a spool lateral flow passage extending laterally from the spool longitudinal passage and configured to transfer the fluids to the tree production flow passage;
• and
• a spool annulus flow passage in fluid communication with the annulus;
• a tubing hanger landable within the spool longitudinal passage and comprising:
• a hanger longitudinal passage;
• and
• a hanger lateral flow passage in fluid communication with the hanger longitudinal passage and the spool lateral flow passage;
• and
• a mating hub connection between the spool assembly and the subsea tree comprising:
• a flow connection configured to fluidly connect the spool lateral flow passage and the tree flow passage;
• and
• an annulus flow connection configured to fluidly connect the spool annulus flow passage with the tree annulus flow passage.

A method for retrieving a subsea system, comprising:

• disconnecting a flow connection configured to fluidly connect a passage of a spool assembly with a first passage of a subsea tree, the spool assembly comprising a longitudinal passage configured to receive a first component of the subsea system;
• disconnecting an annulus flow connection configured to fluidly connect an annulus flow passage of the spool assembly with a second passage of the subsea tree;
• and
• retrieving independently the first component of the subsea system from a second component of the subsea system.

A method for producing fluids through a tubing hanger connected with a tubing string, comprising:

• directing the fluids from the tubing string into a first flow passage of the tubing hanger;
• directing the fluids through a second flow passage of the tubing hanger and into a flow passage of a spool assembly;
• and
• directing the fluids from the flow passage of the spool assembly into a subsea tree via a mating hub connection between the spool assembly and the subsea tree.