Permission to copy is restricted to an abstract of not more than 300 words. Illustrations may not be copied. The abstract should contain conspicuous acknowledgment of where and by whom the paper is presented. Publication elsewhere is usually granted upon request provided proper credit is made.
At the present tine there are around 400 subsea completions worldwide and even the most conservative surveys predict a doubling of this number within the next decade.
This paper discusses the evolution and operation of a flexible, self-contained system which makes optimum use of existing technology hereby offering a safe, reliable and economical system for riserless re-entry into any subsea well.
The traditional method of re-entering a subsea well with wireline involves the use of a drilling rig and a hard riser. The method discussed in this paper enables operators to adopt a flexible approach towards well design in the knowledge that wireline re-entry, whether to change the status of the well or for data acquisition purposes, can now be readily and safely achieved at a reasonable cost since neither a drilling rig nor a hard riser are required.
Me system provides the capability of ruining a comprehensive range of slickline and conductor line equipment using proven components and a design philosophy which centres on maximum flexibility thereby allowing deployment from a wide range of vessels.
The current subsea wireline system has been developed from the prototype system used by a major North Sea operator on a live North Sea well during June, 1986.
The system maximises the use of readily available existing equipment and standard, tried and proven practice. It allows a complete range of slickline and electric line downhole operations on subsea wells, including fishing to be carried out from relatively small monohull vessels as well as from semi-submersibles of any size.