Bubble pump utilization for vertical flow line liquid unloading

摘要

A method, including: performing dual-side depressurization on a hydrate blockage in a subsea flow line, wherein dual-side depressurization includes, reducing pressure on a topside of the hydrate blockage in the subsea flow line by removing liquid from within a subsea riser with a bubble pump that has a first end in fluid communication with the liquid within the subsea riser, reducing pressure on a backside of the hydrate blockage, and concurrently controlling the reduction in pressure on the topside of the hydrate blockage and the backside of the hydrate blockage.

主权项

1. A method, comprising:
performing dual-side depressurization on a hydrate blockage in a subsea flow line, wherein dual-side depressurization includes, reducing pressure on a topside of the hydrate blockage in the subsea flow line by removing liquid from within a subsea riser with a tube bundle having a plurality of capillary tubes, the tube bundle having a first end in fluid communication with the liquid within the subsea riser, wherein the subsea riser is in fluid communication with the subsea flow line, and wherein the liquid is removed from the subsea riser through the plurality of capillary tubes from the first end to a second end of the tube bundle, reducing pressure on a backside of the hydrate blockage, and concurrently controlling the reduction in pressure on the topside of the hydrate blockage and the backside of the hydrate blockage.