The deepwater pipe-in-pipe steel catenary riser is comprised of concentric inner and outer pipe,the inner pipe carries the production fluids and is thermal insulated,whilst the outer pipe provides mechanical protection,and the centralizers are spaced at certain intervals over the full length of the riser to prevent the thermal insulation material in the annulus from being crushed.

Brief introduction of casing project at Ganhe reservoir water release tunnel;

Value of improved pipe in pipe method to treat obstructed drainage tube after operation

To discuss feasibility of life-support machines’centralized management;

The centralized management and development and using of city underground pipelines.;

Consideration of centralized management and unified accounting for basic construction;