Method of servicing a subterranean well

摘要

A method of servicing a subterranean well which comprises the steps of providing a wellhead 6, installing a tubing hanger 4 comprising a bore concentric with the wellhead and a plurality of channels bored longitudinally partially therethrough being spaced around the circumference of the hanger, installing a christmas tree 2 with an internal crossover assembly 10 mounted onto the wellhead comprising an extendable/retractable stab 50, 36 between one of radial production bore or annulus bore in the crossover assembly and the christmas tree.