Dual subsea production chokes for HPHT well production

摘要

Configurations and methods for subsea hydrocarbon production at high pressure wells are contemplated in which production control is achieved by implementing two choke valves in series between the wellhead and the riser. The first production choke reduces pressure from well pressure to a reduced pressure, while the second production choke further reduces the pressure from the reduced pressure to riser pressure. The first production choke is preferably coupled to the production tree, and the second production choke is coupled to production tree, a subsea pipeline-end device (e.g., PLET or PLEM), a well jumper, or a flowline jumper.

主权项

1. A subsea production assembly comprising:
a first production choke fluidly and in series coupled to a second production choke to control flow of a hydrocarbon production stream from a well, wherein the first and second production chokes are non-downhole production chokes, and wherein the hydrocarbon production stream flows through the first and second production chokes; wherein the first production choke is configured to reduce pressure of the hydrocarbon production stream from a subsea well from a well pressure to a reduced pressure; wherein the second production choke is configured to reduce pressure of the hydrocarbon stream from the reduced pressure to a riser pressure; wherein first and second production chokes are fluidly coupled to a wellhead in a position at or downstream of the wellhead and upstream of a riser base; and wherein the wellhead is configured to produce a high pressure fluid.