Wireline (WL) intervention is a light well intervention method that does not require the application of a drilling BOP or heavy equipment. It is easier to assemble and move, more lightweight and improves the frequency of interventions.
WL intervention can be performed on offshore platforms or subsea wells. A WL intervention unit comprises a wireline BOP, a notable riser, and a tool string.
The Well
Well intervention uses technology tools and techniques to improve production from a well. It is a long-term project that requires planning and often involves mobilizing an offshore drilling rig.
Today, most subsea well intervention work is done using riser-based workover systems. However, game-changing advancements in the deepwater intervention are emerging with light-duty intervention risers and riserless light well intervention (RLWI) technologies.
On the other hand, an offshore wireline intervention uses a continuous-length, small-diameter solid or braided wire mounted on a powered reel at the surface to run tools and equipment into the wellbore. Typical wireline operations include perforating, logging, cleaning wells, and dumping cement. When finishing, testing, or carrying out live well intervention operations, the flowhead supports the test string and offers a method of surface well control.
Well intervention is a significant part of the oil and gas industry and vital to maintaining production. As a result, the sector seeks to reduce the cost of well intervention with new techniques and tools.
The Basics
Well intervention is a remedial operation on oil or gas-producing wells to increase production. It may be carried out on land or sea-based offshore oil and gas rigs.
One type of well intervention is wireline intervention. This involves running a cable from a platform deck or vessel into the well.
Another is coil hose intervention, where a coil of tubing is used to extend into the well. Finally, hydraulic workover intervention involves using a system to provide a flexible riser without being inside a conventional riser package.
Wireline, coil hose and coiled tubing interventions have their advantages and disadvantages.
Nonetheless, it is an attractive alternative for light intervention operations because it does not require heavy equipment or drilling BOPs. It also is easy to assemble and move and improves the frequency of interventions.
The Equipment
Wireline field operators lower cables and wires into oil well holes or natural gas reservoirs to conduct various operations during drilling and production activities. This includes performing downhole directional surveys, firing perforated charges, acquiring well logs, and relocating equipment in the borehole.
Wireline equipment comprises logging tools, wireline casings and other hardware rigged to a cable lowered into the hole by a powered reel. These tools provide data that can be used to evaluate and improve product performance and assess the condition of the well bore.
Wireline intervention is an alternative to traditional heavy or riserless equipment, requiring less complex rig uptime and equipment. It is lighter, easier to assemble and move and improves the frequency of interventions.
The Vessel
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The vessel is designed to perform wireline intervention work on offshore platforms without a drilling rig. It has the advantage of being a monohull, making it less expensive to operate than larger, more complex vessels. It also has the advantage of handling motions better. It can be used for slickline, wireline and coiled tubing operations on subsea wellheads.