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Production future applicability and roles of is also contributing to an uptick in rigless vessels. The authors opined that interventions. When this is coupled with future operations that worked the substantially lower day rates associ- “without a central platform” ated with vessels, it furthers the attrac- would require larger vessels tiveness of rigless interventions. than the 70ft and 165ft forward (1)

Works Cited bridge vessels used at Zakum (2) , in order to carry out “? ow 1. Subsea Experienced Gained at Zakum, testing, acidizing, and remedial 1974. Dallas, Texas: SPE.

(1) work” from future vessels . 2. Underwater Engineering, 1977. Tulsa:

Today’s MSVs are in excess of Petroleum Publishing Company.

400ft in length. They complete 3. Advances in Subsea Intervention, the above mentioned functions, 2009. Houston: Gulf Publishing.

fortifying the authors’ foresight. 4. Running Rigless With A Riser, 2012.

Presently, they are also used to Houston: Atlantic Communications.

perform the following: 5. Myths And Misperceptions About

MSV utilized to conduct rigless work

Installation-wise, the cylinders are Plug and abandonment of wells, RLWI, 2013. Houston: Atlantic • secured above the riser to be run while workovers, and well diagnostics Communications.

• remaining directly below the moon- Remediating, ? ushing, and pressure does not commit them to a set of speci? c pool. Furthermore, the cylinders’ ID is testing pipelines functions. Fernando • designed to match the riser of choice, Dewatering ? owlines and ? owbacks Hernandez is the

Conclusion which facilitates, for example, running There is an ongoing trend with the subsea technical coiled tubing through the middle of said build of new vessels. On one hand, Rigless technology has yet to become advisor at Reaching cylinders. Comparatively, the cylinders’ they are increasingly being tailored for fully accepted and adopted technol- Ultra. Hernandez self-compensation design is key, as it rigless activities. On the other hand, ogy. However, the last ? ve years “have speakings three foregoes the need to have a mechanical however, vessels continue to enter the seen advances in vessel and deployment languages and has link, as with rig tensioners. The goal of market with general and non-speci? c technologies,” tripling the depth of rig- extensive ? eld

Deep Ingenuity - Ad 184x130_02.20.14.pdf 1 2/20/2014 9:08:11 AM (5) this system is to unlock and rede? ne intervention templates: Both have their less wireline projects , further validating experience in the ROV tooling, auto- the work that can be conducted from a inherited advantage. However, the lat- rigless technology. In addition, the lack mated controls, subsea and well interven- vessel’s moonpool in deepwater. The ter gives vessels greater ? exibility as it of available rigs, when in high demand, tion sectors. authors believed the soft riser method (1) to be simple , with a forecasted depth (1) applicability of 984ft to 2952ft , a depth that the heave compensated cylinder is being con? gured to exceed.

Further vessel considerations

The commonality shared by the afore- mentioned methods is the use of a vessel, which gave the authors insights into the

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