This paper describes the response time properties of the direct hydraulic control system for the subsea Christmas trees installed in the Cadlao Field, offshore Philippines. Experimental testing simulated 29 different operating conditions to verify analytical predictions, to demonstrate the effectiveness of applying a common boost pressure to the spring chambers of the gate valve actuators, and to collect data for future applications. Actual data are presented and various relationships defined. With the use of boost, direct, closed hydraulic circuits with ganged functions offer a viable control method for distances up to 3 miles.

Keywords:
subsea system, gate valve, valve, prediction, signal time, response time, upstream oil & gas, steel, valve actuator, volumetric expansion
Subjects:
Offshore Facilities and Subsea Systems, Controls and umbilicals
Copyright 1983, Society of Petroleum Engineers of AIME
You can access this article if you purchase or spend a download.