05413175 is referenced by 26 patents and cites 8 patents.

A method is provided for the stabilization and control of the two-phase flow of hot fluid containing water issuing from the top of an upwardly rising conduit or riser of a horizontal oil-production well. The fluid enters the bottom of the riser at a temperature higher than the saturation temperature of water at the conditions prevailing at the top of the riser. A first mass rate flow controller is coupled to a mass rate flow detector at the top of the well for controlling mass flow at a substantially constant rate over a short time interval. Signals indicative of the optimal flow rate for the process are input to a second controller. The second controller adjusts the mass flow rate setpoint of the first controller. The second controller has a time constant significantly longer than that of the first controller. Thus, the mass rate of hot fluid is controlled at a substantially constant mass rate over the short term, thereby stabilizing two-phase flow, and is adjusted over the longer term to control the flow of fluid at an optimal rate.

Title
Stabilization and control of hot two phase flow in a well
Application Number
8/227116
Publication Number
5413175
Application Date
April 13, 1994
Publication Date
May 9, 1995
Inventor
Neil Edmunds
Calgary
CA
Agent
Rothgerber Appel Powers & Johnson
Assignee
Alberta Oil Sands Technology and Research Authority
CA
IPC
E21B 47/06
E21B 43/12
E21B 43/24
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