Electrical Submersible Pumps (ESP's) are being utilised on production platforms as a method of artificial lift for enhanced recovery of oil. With more subsea fields being developed, it is apparent that there will be a demand for this technology in subsea completions. This paper presents the technical issues involved with the installation of ESP's in a subsea completion and describes a system for low cost installation and recovery of the ESP without the requirement to recover the tree. The system utilises existing workover equipment and techniques to provide a safe environment for a tUbing orcable suspended pump application.
Electrical Submersible Pumps (ES.P.'s) have for many years been used to maintain and increase production from oil wells. One of the major contributors to ES.P. failures is recognized as the electrical system. These problems compound when this technology is applied to a subsea developed well. This paper describes a system by which, when used with a subsea tree designed for ease of pump replacement, these problems are reduced.The aim of the Subsea Submersible Pumping (S.S.P.) Project was to develop a system where ES.P.'s could be safely and economically replaced from a floating vessel. The electrical feed-through of the high power for the ES.P. was a key element in the design process. A novel design of subsea tree evolved which permits the recovery of the E.S.P. without the need to retrieve the tree. An integral part of this design required the use of high power, wet mateable electrical connectors. As these connectors were identified as requiring development, a prototype "design, build, and test" program was commissioned.
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