Brighton Marina
Brighton
East Sussex
BN2 5UP
UK
Phone : 01273 818711
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Company No. 01556272
North America
In our last exciting episode , I talked about how us lovable wackadoos at T H Hill have dealt with fatigue for years: we use a “comparative design approach” to choose the lowest-risk options for our design. This entails giving up on the idea that you can figure out the actual life of your tool, and instead just playing the best odds you can manage. Whilst it might not give you that warm, fuzzy feeling we all want, it actually does work. Just logically, choosing the best option available to you for any given operation really should be the best path forward, and we’ve watched our customers’ failure rates plummet when they use things like Curvature Index to decide what to do. What this comparative thingy does not do—actively refuses to do—is tell you exactly when your crap will break. Since preventing fatigue failure is all about inspecting properly at the right intervals to catch those cracks before they wash out or twist off, that’s … disappointing. But! We can do more! (I think?) Here’s how I see it: you’re all wrong. (My winning personality shines through again.) We usually set our inspection intervals based on time, somehow or other—hours rotating, footage drilled, wells, months, presidential terms, whatever. I would argue that we don’t actually care how much time has elapsed, since the reason to inspect our pipe is to catch damage before it becomes a failure. Thus, we need to know how much damage has elapsed, not how much time. The trick, of course, is that “damage” is a pretty abstract thing to measure, while “time” is quite clear (as long as we’re not in a sci-fi movie ). So we measure time, hoping that we’re making a reasonable guess at the amount of damage that has occurred. I have my doubts.
What would be better is to give up on time, since it’s inaccurate at best, and misleading at worst. What I need is something that can help me estimate real-life damage. It helps to split the world into two main failure types—overload and fatigue—since the type of failure will determine the type of damage we’re looking for. If I go searching for a way to estimate damage to my overload capacity, I reach a pretty clear conclusion: measure it. Overload capacity is defined by the material strength, which doesn’t change (except in extreme circumstances), and the cross-sectional area at the critical spots, which only changes due to wear and is easily measurable. So do this:
The box OD measurement tells you if abrasive wear has reduced the critical load-carrying capacity of the box (which is usually the source of your drilling torque limit). The wall thickness measurement tells you if wear has reduced the load-carrying capacity of the tube (usually the tension limit). These measurements can be taken quickly, even on the rig floor (no that’s not a terribly precise way to do an inspection, this is just for the general idea) as described in the Rig Floor Trip Inspection in DS-1 Volume 3 . Now instead of saying “I’m going to inspect my pipe every 3 wells,” you say “I’m going to inspect my pipe when either the box OD I measure wears down by 1/8 inch, or the tube wall wears by 0.040 inch” (or whatever numbers you want to set). This means that you are, in fact, setting your inspection interval not by time, but by the damage that we’re actually concerned about. I think it’s a better idea. (Hardly anyone does this. I don’t care. I still think it’s a good idea, and you’re used to me being something of a left-handed monkey wrench at this point, right?)
| Fatigue represents a trickier problem (as usual). There’s nothing that we can measure that will determine the life that’s been used up, so whatever “damage” measurement we end up with will be an estimate. My stress-life curve (you remember those, ?) tells me that the two things that define the overall life of a given specimen are the stress applied and the number of cycles ( and , doncha know). Now, honestly, those SN curves need to be adjusted when the stress amplitude isn’t fully reversed (i.e. the max/min stresses aren’t just positive and negative of the same number), so by “stress” I mean a combination of bending and tension that will lead to a certain level of fatigue-damage “severity.” |
I can count cycles; I can estimate it without too much work using ROP & RPM averages. But “severity”? What do I know about that will combine both the tension applied and the amount of curvature into some indication , some index that might communicate the speed at which cracks grow in drill pipe? I hope you’re catching on here, people, I’m laying it on thick. Curvature Index! That’s its whole purpose in life, to tell you (in a relative way) how hard you’re being on your drill pipe, and what your fatigue-failure risk might be!
(In DS-1 we divide that by a million to make the numbers more manageable. You do you.) Now, armed with Damage Points, we can calculate an inspection interval that no longer depends on time, but represents an estimate of damage. How many Damage Points to an inspection? Dunno; it still depends on what you’re doing. I’d start with about 600 and adjust—brand new pipe could probably go to 900 or 1,000 points before you inspect it; older pipe and/or corrosive environments might drive that down to 500 or so. Each time the pipe passes a good crack-detection inspection, you reset the count for that joint to zero. The particular damage-point interval is not the point, though; the number just a number that you can (and should) change to match your operations. The point of damage, uh, points, is that it’s a better way to measure. It’s still a guess at the amount of damage done, but it’s a more intelligent guess based on the things that actually matter, rather than something which doesn’t matter at all. I’m clearly a big fan of this idea, despite the fact that not many people use it. When I bring it up, though, I usually get something like this: “Wait, don’t you have a different tension / bending combination at every joint of pipe? So a different Curvature Index at every joint?” “Yes.” “So every joint has a different number of damage points to track?” “Um, yes.” “Yeah, we’re not gonna do that—it’s impossible.” I, of course, have done as many as six impossible things before breakfast , and I have two different answers for such talk. Answer #1: It’s not impossible; I’ve seen it. We’ve had customers that commit to tracking where their pipe goes—in the well, in the hole, as it’s racked back, as it’s picked up, as it’s transported around—all with the goal of knowing just when they should inspect the string (and how to rotate pipe so they can safely put off inspecting the string). It’s work, to be sure. The trick seems to be getting everybody at the rig on board; once everyone knows that we’re going to follow certain patterns racking back and laying down, and to ask the right people which section goes where (lay down section A, B, and C; pick up B, then C, then A), things go swimmingly. There’s also got to be someone driving the calculation, of course. If you are, in fact, tracking damage points on every joint of pipe, I recommend writing a software program to help you out. (We call ours CFat™ ; this is not a shameless plug. Nope.) That way you can process the information that comes from your digital drilling-data platform and figure out what’s happening now, and make some decisions about what you should do in the future.
Answer #2: Doesn’t every joint of pipe in your well accumulate a different number of rotating hours? Do you track that? Hm? (Doubtful.) In the same way that you can do broad sweeping estimates with rotating hours (or footage, or whatever), you can also calculate your Damage Points on the back of an envelope. Just pick the worst spot you expect in your well, work through your typical operations, and add up the damage done. Inspect at that calculated interval. Even in this simplistic state, it’s still better than time because, again, it’s looking at real damage. It allows you to change something in your typical drilling process and make immediate changes to your inspection plan with less trial and error. You can use it to rotate your pipe in some reasonable way to lessen the inspection burden you’ll have. It’s just plain better. To land this plane: if you ask me how often you need to inspect your pipe, you’re going to get some weird answers (measure some dimensions regularly and calculate damage points). I know I’m abnormal (in multiple ways), but I really think our industry can do a lot better by using our noggins a little bit. And, if history is any indication … you’ll probably ignore me. (Pouty face.)
Grant has been at BVNA for 15 years, doing failure analysis, drill stem and casing design, standards writing, and teaching others to do it, too.
Grant Pettit Director Of Operations - Standards, Training, & Accreditation
February 16-18, 2024 • Hosted by the St. Petersburg Yacht Club
February 16-18, 2024
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Enjoy snack and drinks nightly, the launch of Mount Gay Rum’s special edition, SPYC’s Famous Saturday Supper, music, games and more. Complimentary Social Passes for SWRS Race Officials and Junior Sailors. Advance offer – Buy 4 and the 5th pass free.
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ST. PETERSBURG — From a distance, the landmark on Third Street S doesn’t look like much: a steep lump in the road south of 15th Avenue, marked by a blinking amber light and the letters S L O W . It’s no roller coaster, but the incline of the hill is enough to cause the same flipping feeling in your stomach.
Thrill Hill is a favorite landmark for those in St. Petersburg’s Old Southeast neighborhood. Mentions grace bumper stickers and T-shirts around town. Stop by Pinellas Ale Works and you can order a brew named after the bulge.
When I’m feeling stressed, or bored, or I want to surprise friends visiting from out of town, I head for the hill for a quick hit of joy. Needless to say, I’ve been zipping over the hill a lot lately.
After yet another evening punctuated by a stress drive to Thrill Hill, I wondered: Why is this here? And where did it get its name, anyway?
Turns out, the thrill goes back over 100 years.
Thrill Hill, a humpback bridge over Salt Creek, was first created when a trolley line was introduced at the turn of the 20th century.
F. A. Davis, the man who introduced electricity to St. Pete, established the St. Petersburg and Gulf Railway Company in 1901. Davis brought trolleys to the city when there were fewer than 2,000 residents, said Will Michaels, author of Making of St. Petersburg and Hidden History of St. Petersburg .
His company’s Big Bayou trolley line debuted in 1911 as a way to transport passengers between downtown and the southern parts of the city. The route was designed to pass by Bayboro Harbor, where the University of South Florida St. Petersburg is today. Many didn’t have cars and were dependent on the streetcar line to get downtown.
“We had a light rail before the term was invented,” Michaels said.
By 1913, there were 1.3 million individual passenger trips reported on the streetcars, Michaels said. As early as 1915, St. Petersburg had the third largest trolley system in the state, with 25 miles of track. Ridership increased to 4.2 million trips in the late 1920s.
Each stop had informal nicknames, Michaels said. The Thrill Hill bridge, built steep enough to allow for high tides and stormwater surges, was referred to as “the hump.”
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Even then, a ride over it elicited a stomach-dropping sensation. Times archive clips mention some riders liked to hang on the back of the cart for an extra bit of fun. Other times, smaller trolleys on this line would get stuck on the way up, requiring the conductor to get out and push it himself.
“The best story I ever heard about Thrill Hill was kids would grease the lines there and the trolley line would be chugging along and it wouldn’t be able to get up the hill,” Michaels said. “It just kept sliding back.”
Bus transportation superseded the trolley in the late 1940s, and the last trolley car line ended in 1949. As the rail was phased out, the bump remained a popular spot for thrill seekers traveling by car or bike.
A 1987 St. Petersburg Times article said the bridge got its name “because its humpbacked design can cause speeding cars to become airborne.” St. Petersburg gastroenterologist Dr. Nicholas Kozlov explained a theory behind the roller coaster-like sensation it has to a reporter in 1998:
“I would speculate that primarily it has an effect on your balance center in your middle ear … but then again there is going to be an effect on your entire body because you will sense the fall in many different ways. Your clothing will shift just a little bit, what’s in the bottom of your stomach may fly to the top of your stomach, and other little movements … but it’s not directly an effect on the stomach but an effect on your balance centers that produce the sensation.”
But the same steep incline that causes a fluttering sensation in the stomach also makes it hard for motorists to see what is coming. Numerous clips in the Tampa Bay Times archives outline crashes there. Four people were injured and one man died in two different head-on crashes in 1987. In hazards unrelated to traffic, an alligator was removed from the crest of the hill in 1998.
Over the years, measures were put in place to make the hill safer. A 25 mph speed limit was introduced, as well as a blinking caution light.
Today, the crest of the hill is a popular place to fish for mullet, snook and trout that live in the brackish water below. It’s also still a draw for daredevils.
“I’ve seen carloads of kids, some of them sitting with their butts sticking out of the window when they’re gunning it,” said Frank Tsang, a manager at Old Southeast Market, located just down the road from the hill.
“You hear them screaming sometimes, and then it’s like, ‘Okay, someone just went over Thrill Hill again.‘”
Tsang remembers the tradition of driving over the hill that was around when he was a high school student. Now 43, he doesn’t want to encourage kids to do anything unsafe.
“Sometimes there’s jaywalkers, just kind of strolling across the thing, so you can’t see them until the last second. You have to be a little bit careful about that,” he said.
The market’s bestselling sticker pays homage to Thrill Hill. Old Southeast resident Brian Ottoson, 40, designed the green and yellow “I Climbed Thrill Hill” decal after he and his wife saw an “I climbed Mount Washington” bumper sticker on vacation.
View this post on Instagram Looking for a special stocking stuffer? We carry a very unique selection of local-centric items that would be perfect for someone who loves the Burg! #oldsoutheastmarket #stpete #shoplocal #stockingstuffers #christmas #gifts #kspl #dtsp #thrillhill #widesky #skyway #pier A post shared by Old Southeast Market (@oldsoutheastmarket) on Dec 18, 2019 at 12:49pm PST
About 600 stickers have been sold in the past four years at Old Southeast Market, which has also stocked a Thrill Hill T-shirt from local print company Wide Sky.
“I think I get a kick out of it more than anything,” Ottoson said. “I love driving around town and seeing one of the bumper stickers on the back of cars.”
“It’s kind of a little hidden fun thing in St. Pete, but it’s nice to bring some light to it.”
Information from Times archives was used in this report.
Culture, music and nostalgia reporter
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Yacht Name | Tilting at Windmills |
Sail Number | SM117 |
Owner | Thorry Gunnersen |
Skipper | Thorry Gunnersen (12) |
Crew | J Alexander (3), P Briggs (5), M Grant (1), R Lindberg (7), S O'Leary (1), A Roberts (1), J Cain |
State | VIC |
Club | Sandringham Yacht Club |
Type | Joubert Modified 42 |
Designer | Peter Joubert |
Builder | N. Wright & Sons |
Construction | Timber Composite |
LOA | 12.83 |
Beam | 3.75 |
Draft | 2.47 |
Shop the official clothing range of the Rolex Sydney Hobart Yacht Race and the Cruising Yacht Club of Australia in person at the Club in New South Head Road, Darling Point or online below.
From casual to technical clothing, there is something for all occasions. Be quick as stock is limited!
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Tilting at Windmills is a John Dory sloop built by Norman R Wright and Sons in 1994 that has been raced and cruised extensively in Australia, the South Pacific and Europe by the late Thorry Gunnersen, and his daughter Sarah Gunnersen-Dempsey. Sarah will take the boat south with a tight knit crew who have sailed together for many years both ...
Yacht Name: Tilting At Windmills: Sail Number: Sm 117: Owner: T.Gunnersen: Skipper: T.Gunnersen: CYCA SHOP. OFFICIAL ROLEX SYDNEY HOBART MERCHANDISE. Shop the official clothing range of the Rolex Sydney Hobart Yacht Race and the Cruising Yacht Club of Australia in person at the Club in New South Head Road, Darling Point or online below. ...
Tilting at Windmills is a timber yacht designed by Professor Peter Joubert and was built in 1994 by Norman Wright and Sons. She was launched in time for the anniversary 50th Hobart race where she finished 12th in IMS Division E. Her best result in the Hobart was in 2003 when she finished second overall in IMS for second in division, and seventh ...
When the modified Joubert 42, Tilting at Windmills, docked in Hobart sunday afternoon, crew member Vanessa Dudley became just the third woman to achieve the milestone 25 Sydney Hobarts in the Cruising Yacht Club of Australia's race. The respected sailor would have got there sooner, but COVID stopped her in 2020 and then a sailing injury weeks ...
The expression 'tilting at windmills' derives from Cervantes' Don Quixote - first published in 1604, under the title The Ingenious Knight of La Mancha. The novel recounts the exploits of would-be knight 'Don Quixote' and his loyal servant Sancho Panza. who propose to fight injustice through chivalry.
Description. Tilting at Windmills is a composite timber yacht designed by Joubert, built in 1994 by Norman Wright and Sons. LOD feet. 40. Hull Timber. Balsa core. Type of Boat. John Dory Sloop. State.
Don Quixote is considered heroic for "tilting at windmills" because he embodies noble ideals of chivalry, justice, and honor, striving to right the world's wrongs despite insurmountable odds. His ...
Tilting at Windmills (2010) Yacht: Tilting at Windmills. Race: Melbourne to Hobart. Year: 2010. See more from this race. A beautiful boat designed by Peter Joubert. The Prof! ... Owner, Thorry Gunnersen, has been a regular visitor to our yacht race stand at Constitution Dock for many years. Choose your print size:
BMYC Crusining will take a trip from BRighton Marina to the North east edge of thge windfarm and back. A super shakedown sail and a chance for us to sail as a group. We can take phots and share these - a great opportunity to get a cool photo of your boat ! 11:00 depart brighton 15:00 return. 15:00 Meet at BMYC for drinks.
Tilting at Windmills with Cruising enthusiasts of BMYC... What a day!!! What a life!!! www.bmyc.uk. Brighton Marina Yacht Club · Original audio
Vessel TILTING AT WINDMILLS is a Sailing Vessel, Registered in Australia. Discover the vessel's particulars, including capacity, machinery, photos and ownership. Get the details of the current Voyage of TILTING AT WINDMILLS including Position, Port Calls, Destination, ETA and Distance travelled - IMO 0, MMSI 503155900, Call sign VLV2465
Tilting at Windmills. 67 likes. Product/service
The meaning and origin of the expression: Tilting at windmills. Tilting at windmills. Houses and buildings; What's the meaning of the phrase 'Tilting at windmills'? To 'tilt at wi
Tilting at Windmills. Jul. 18 2024 - Grant Pettit. DS-1. LinkedIn. Facebook share. In our last exciting episode, I talked about how us lovable wackadoos at T H Hill have dealt with fatigue for years: we use a "comparative design approach" to choose the lowest-risk options for our design. This entails giving up on the idea that you can ...
*Read description first*Triggers: After clearing Ophilia's Path.Location: In front of the windmill, next to the jail. Talk to the Slender Farmer.Path Actions...
Tilting at Windmills is a timber yacht designed by Professor Peter Joubert and was built in 1994 by Norman Wright and Sons. She was launched in time for the anniversary 50th Hobart race where she finished 12 th in IMS Division E. Her best result in the Hobart was in 2003 when she finished second overall in IMS for second in division, and seventh overall under IRC.
Tilting at Windmills is a regular competitor in long offshore events including the Melbourne - Hobart Race and has recently returned from circumnavigating New Zealand's south island. Competitor Details. Yacht Name: Tilting at Windmills: Sail Number: SM117: Owner: Thorry Gunnersen: Skipper:
Helly Hansen Sailing World Regatta Series - St. Petersburg. February 16-18, 2024 • Hosted by the St. Petersburg Yacht Club. Official Race Program. Schedule of Events. Regatta Series Shop.
Turns out, the thrill goes back over 100 years. Thrill Hill, a humpback bridge over Salt Creek, was first created when a trolley line was introduced at the turn of the 20th century. F. A. Davis ...
The Yachts; 2005; Tilting at Windmills; Tilting at Windmills . Tilting at Windmills, designed as a comfortable cruiser/racer and built in timber, achieved remarkable success in the 2003 Rolex Sydney Hobart Yacht Race when she finished 2nd overall in the IMS division.
View Address. Contact. Call Now. 200 Beach Drive NE, St. Petersburg, Florida, 33701, United States. Tampa Bay's premier yacht brokerage and charter business for over 30 years offering services including yacht and boat sales, yacht charters, and marine service. Save Search. Clear Filter Owner: broker-st-petersburg-yacht-sales-service-30654.
Yacht History. The Vessel was purchsed new in 1995 from Sailing and Boating in Flowery Branch, Ga and is hull #41. ... She was kept on Lake Lanier for several years then moved to South Carolina and kept at Windmill Harbor for about a year. Then, sailed from Hilton Head to Panama City. ... ENO Marine (3) burner Propane Stove Adler Barbour 12v ...
Tilting at Windmills celebrated extraordinary success in last year's Rolex Sydney Hobart finishing second Overall on IMS. She is a regular competitor in long offshore events including the Melbourne-Hobart Race and has also spent time cruising including circumnavigating New Zealand's south island.