How offshore engineers publish
In September 1985 William T. Bennett, Jr. presented a paper called "Leg Loading and Unloading" to the first International Conference on The Jack-up Platform at City University in London. It heads the list on the restored technical papers page. Eighteen years later three papers co-written by Bennett engineers went to the ninth conference in the same series, all of them on rack phase difference and spudcan footprints. Between those dates sits most of what a newcomer needs to know about how offshore engineering knowledge is shared, argued over and finally written into rules.
Where offshore engineers publish
The ten entries on the restored page name almost every kind of venue in the field.
Specialist conferences. The Jack-up Platform conference at City University London appears five times: Bennett's own paper in 1985, a 1989 paper on preloading at sites with difficult seabed by Jacob Alford with Vladimar Rapaport of Marine Soil Consultants, and the three 2003 papers. A meeting devoted to one type of structure draws the people who design, build, insure and certify that type, which makes it the place for detailed arguments about leg loads and soil.
The big industry conference. Two entries come from the Offshore Technology Conference, held in Houston, usually in early May, since 1969: a 1994 paper on soil-structure interaction during preloading, and the 2000 paper by William Strong and R. P. Michel introducing the Q4000 as a dynamically positioned semi-submersible for 10,000 feet of water. OTC is sponsored by thirteen engineering and scientific societies, SNAME among them. Its attendance reached 108,300 in 2014, and all of its technical papers are available through the OnePetro library.
Drilling and regional meetings. The 2004 paper on jack-up mobilisation in complex soils, including the "Swiss cheese" mitigation method, went to the IADC/SPE Asia Pacific Drilling Technology Conference in Kuala Lumpur, a meeting named for the International Association of Drilling Contractors and the Society of Petroleum Engineers.
Deepwater and regulation. A 2009 paper at the Deep Offshore Conference in Monaco discussed how classification societies and designers can apply existing rules to novel deepwater concepts. Its subject is close to the kind of project described on the MinDOC Titan page, a new type of deepwater hull.
The primer. The odd one out is "Jack Up Units: A Technical Primer for the Offshore Industry Professional", copyright 2005. It is a primer for practitioners rather than a conference paper, yet the jack-up primer page calls it by far the most requested Bennett document, used as required introductory reading for people new to the industry.
Behind those meetings stand the societies. The Society of Petroleum Engineers grew out of an oil and gas committee that the American Institute of Mining Engineers formed in 1913, and became a society of its own in 1957; its first board met on 6 October that year. According to the Wikipedia article on SPE, its OnePetro library holds more than 314,000 technical papers. SNAME, organised in 1893, covers the ship and floating-structure side and publishes peer-reviewed papers of its own. A paper on jack-up soils might go to either, or to a specialist meeting, depending on whether the authors want drilling engineers or naval architects to read it first.
From paper to recommended practice
Conference papers are where ideas are tested. Recommended practices are where the survivors end up. The restored page notes that William Bennett co-chaired the SNAME committee that drafted the original Recommended Practice for the Site-Specific Assessment of Jack-ups, T&R 5-5A. That document set out how to check whether a given jack-up can work at a given site, with its water depth, weather and soil. The general consulting page lists jack-up site specific assessment first among Bennett's services, as did the 2012 version of that page, which adds punch-throughs and RPD problems to the damage situations the firm advised on, and the primer devotes a section to the difference between class approval and site assessment.
The path from one to the other is slow and collective. A paper describes a problem seen in the field, such as the brace loads caused by rack phase difference, which our note on legs, spudcans and preload explains. Others reply with data from their own rigs. A committee of volunteers, the way SNAME's technical and research committees are staffed, weighs the evidence and writes a method. Years later, a junior engineer runs that method without knowing whose argument it settled.
How a typical offshore paper is built
Most papers in this field follow the same broad order, and knowing it makes them quicker to read.
- Abstract. A paragraph that states the problem, the method and the main number. Read it first and decide whether to go on.
- Introduction and background. Why the problem matters, often with a field incident or a gap in the current rules.
- Method. The analysis model, the soil data, the load cases. This is where the assumptions live.
- Results. Tables and plots of loads, penetrations, motions or stresses.
- Discussion and conclusions. What the results mean for designers and operators, and what is still uncertain.
- References. Earlier papers, standards and test reports. In a narrow field the reference list doubles as a map of who works on what.
Reading a paper critically
Engineering papers are written by people with commercial interests, and that is not a scandal; designers publish partly to show what their designs can do. It does mean a careful reader asks a few questions. Is the model calibrated against measurements, or only against another model? The restored going on and off location page, for instance, stresses that its motion simulations were benchmarked against model tests and full-scale data, and its soil models against centrifuge tests. Are the soil properties from the actual site or from a generic profile? Does the conclusion depend on one load case? Would the result change if the jack-up had four legs instead of three? And when a paper reports field experience, how many rigs and how many sites stand behind it? A method drawn from a handful of locations in the Gulf of Mexico may say little about a site in the North Sea or off West Africa, where the seabed soils can be quite different.
Students in engineering and the earth sciences are often asked to put exactly these questions on paper, in the form of a review of a published article. The skills overlap with any critical review: summarise fairly, judge the method and the evidence, then say what the work adds. AllEssay's step-by-step guide to writing an article review walks through that structure, and the 2000 Q4000 paper or one of the 2003 rack phase difference papers would make a good subject for the exercise, because the restored pages here give the context the paper alone does not.
Finding the papers today
The request form that once sat on the Bennett site is gone, and this archive cannot supply copies. OTC and SPE papers are indexed in the OnePetro library, which the Society of Petroleum Engineers manages; SNAME publishes its own papers and recommended practices. When searching, the author names on the restored page are the best key, since titles of the time were long and not always consistent across citations.
Our note on studying naval architecture covers the societies that publish this material and how students join them, and the glossary explains the terms you will meet in the abstracts.
Questions readers ask
Where did Bennett engineers present their papers?
Mostly at the International Conference on The Jack-up Platform at City University London and at the Offshore Technology Conference in Houston, with single papers in Kuala Lumpur and Monaco.
What is SNAME T&R 5-5A?
The SNAME Recommended Practice for the Site-Specific Assessment of Jack-ups. The restored papers page says William Bennett co-chaired the committee that drafted the original version.
Can I get copies of the Bennett papers or the primer here?
No. The old request form no longer exists and this archive cannot supply copies. OTC and SPE papers are indexed in the OnePetro library.
Sources
Next in the archive: Offshore engineering glossary · Jack-up rigs explained · Restored page: ORCA series overview