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New Recommendations to avoid jacking system failure

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Oil Rig at sunrise Scotland

Oil Rig at sunrise Scotland

A joint industry project on jacking system maintenance and inspection has resulted in a new DNV GL Recommended Practice. This provides guidance to ensure the correct and safe functioning of rack and pinion style jacking systems. The objective is to reduce the risk of gear failure, resulting in lower costs and higher availability throughout the asset’s life time.

The consequences of jacking gear failure can be severe and, while the problem is acknowledged by the industry, the correct maintenance and inspection of the jacking systems have proven to be challenging due to the high turnover of people with specific knowledge on board, the evolving nature of the systems and the intermittent use of the systems.

To address this industry challenge, DNV GL has during the past year collaborated in a Joint Industry Project (JIP) with the owners Rowan Drilling, Seadrill, Prospector Drilling, Noble Drilling and UAE’s National Drilling Company, the recently merged service suppliers Energy Service International and WillTeco and vendor Cameron Letourneau to come up with practical guidance for the jack-up industry.

Michael van der Geest

Michael van der Geest

“In bringing together key industry players, the JIP format provided the opportunity to openly discuss issues and challenges related to jacking gears. The recommendations from this collaboration will help to reduce the risk of jacking gear failure, downtime and the overall life cycle cost, ” says Michiel van der Geest, Project Manager, DNV GL – Oil & Gas.

DNV GL will issue a recommended practice (RP) in October proposing the following measures:

Clear definitions of competency levels supporting the organisation of and knowledge transfer between the different roles involved in jacking system inspection and maintenance. This will also help the crew determine when to call for assistance and what they can do on their own.
Clear definitions of the inspections that can be executed by the onboard crew and what should be covered in periodical surveys by experts. Specific recommendations are given for inspections after operations close to or exceeding jacking system design limitations to (re-) gain confidence in the system and detect possible limitations.
Best practices for an effective maintenance organisation.
Clear guidance on what information the operators and original equipment manufacturers (OEMs) need to provide in the form of user and maintenance records. Very specific information is needed for correct system assessment and maintenance throughout the asset’s lifetime.
A detailed overview of specific components, including a short description of their functionality and consequence of failure, typical observations and recommended follow-up actions.

Oil drilling platform in the Mediterranean

Oil drilling platform in the Mediterranean

Best practice for the selection of spares, with a specific focus on obsolescence issues to avoid unnecessary delays caused by logistics.
Based on Reliability, Availability and Maintainability (RAM) and Reliability Centered Maintenance (RCM) analyses, there are recommendations for further improvements related to maintenance and inspection. The possible improvements are demonstrated in a case study.

Following the publication of the RP, DNV GL, in cooperation with the other JIP partners, will arrange experience-exchange sessions and presentations of the RP in the major oil and gas industry hubs worldwide, starting at ADIPEC in Abu Dhabi in November. In addition, DNV GL is actively seeking input for the further development of the recommended practice in cooperation with other industry bodies.

Jacking gear corroded

Jacking gear corroded

Interested parties can register here to receive a copy of the RP when it is available:http://www.dnvgl.com/news-events/news/new-recommendations-to-avoid-jacking-system-failure.aspx

About DNV GL
DNV GL is the world’s largest ship and offshore classification society, the leading technical advisor to the global oil and gas industry, and a leading expert for the energy value chain, including renewables and energy efficiency. We are also one of the top three certification bodies in the world. In the oil and gas industry, DNV GL enables safe, reliable and enhanced performance in projects and operations. We provide integrated services in technical and marine assurance and advisory, risk management advisory and offshore classification. Our 5, 500 people combine industry expertise, multi-disciplinary skills and innovation to solve complex challenges for our customers. Together with our partners, we drive the industry forward by developing best practice and standards across the asset lifecycle. Find out more at www.dnvgl.com

About DNV GL Offshore Classification
DNV GL helps customers to ensure adequate safety and reliability through offshore classification during all phases of the asset’s lifetime, i.e. design, construction and operation.

We have deep and complete understanding of the risks and opportunities in the offshore area, with over 40 years of experience in providing classification services for offshore units and floating production installations built and operated worldwide.

Last year’s merger has brought together DNV’s premium classification services with the renowned self-elevating unit related consultancy services of GL Noble Denton. This unique set of value added services makes DNV GL a leading technical expert in jack-ups.

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