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Keywords: anchor
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31980-MS
... and serves as input data for the anchor design. Suction piles were chosen as an anchoring solution due to its successful use in similar applications in the past. However, larger piles were required to achieve the purpose of this application in enabling the use of DP rigs in shallow water. Figure 3 shows...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31859-MS
... or suggested for future opportunities. During the operations, many opportunities for improvement were identified, such as: the ideal drilling schedule to launch the anchors with the Anchor Handling Tug Supply Vessel (AHTS); the imprisonment of the cables by the cement of the surface casing in the mud line...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31744-MS
... semisubmersible platforms of WFA pilot farm are moored at a water depth of around 93-98 meters about 20 km offshore Viana do Castelo in Northern Portugal. The mooring system supply and anchor design for the WFA project are elaborated in this paper. The challenges related to anchoring and mooring scope...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31877-MS
... system in hole can lead to distractions and complacency resulting in injuries due to lack of focus. The system can prevent failed runs and reduced trips with its combination of redundant activated anchor and mill to whipstock interface, the anchor being configurable in either hydraulic or annular...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31129-MS
...Overview of SEPLA Design and Installation – Current Practice As shown in Figure 1 (a) , the design of a typical SEPLA consists of a main plate (termed "fluke") with a width of B , a shank with a length e that extends perpendicularly to the anchor fluke, and a keying flap that is connected...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31318-MS
... installation cost plate anchor economic mooring system mooring system wind energy configuration 1 anchor configuration upstream oil & gas foundation turbine configuration 3 offshore technology conference suction pile configuration 2 installation vessel requirement commercial scale...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30729-MS
..., shut down and ramp up operations Several mitigation measures for pipeline walking as a results of these mechanisms have been developed and studied over the years with the most common being the use of hold-back anchors installed either at the middle or the end of a pipeline, the latter being...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30901-MS
...Abstract Abstract An anchor penetration model is an important aspect of a cable burial risk assessment as the model is there to predict the depth a given anchor will penetrate to, once deployed. There are a number of variables that influence the penetration depth of anchor, which are as follows...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30543-MS
...) of both substation platforms for a 200 MW farm is estimated by including the electrical substation, platform hull, mooring lines, anchors, integration, installation and commissioning costs. Installed CAPEX costs of the platforms show that the semi-type substation platform cost is lower than the TLP-type...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29350-MS
... suction anchors, PLETs and PLRs. Figure 1 Aasta Hansteen Field Location The field is located in an area of the Norwegian Sea with particularly harsh environmental conditions. This is illustrated in the figure below, which shows that while some fields on the Norwegian Continental Shelf are exposed...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29605-MS
...Abstract Abstract As development concepts for the Johan Castberg Field matured, new locations required soil data. A harder layer has been identified from previous soil data and mapped on seismic profiles as Seismic Unit II. This layer may cause refusal of suction anchor penetration and should...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29640-MS
... anchoring, the paper also attempts at showing this concept could be used more extensively in full field developments. Indeed, the novel approach proposed in this paper opens the door to a completely novel collaboration model between contractors and operators, establishing continuity of construction during...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28721-MS
...Abstract Abstract An analytical methodology for estimating walking anchor force is presented. Currently, anchor force calculation requires substantial FEA which is not compatible with early phase design schedules. At such stage, anchor force is typically assumed to correspond to full pipeline...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28901-MS
...Abstract Abstract This paper proposes a novel dynamically installed ‘fish’ anchor, adopting a geometry taken from nature, for economic and safer tethering of floating facilities in deep water. Every cross section of the fish anchor shaft is elliptical, leading to very low drag resistance during...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29034-MS
... It is now recognized that seabed trenching in taut deep water moorings can reach the suction anchor and the chain padeye depth, with the safety of the mooring system becoming a concern. However, the actual formation of such trenches and their development with time are still largely unknown...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29068-MS
...Abstract Abstract Recently there has been significant interest in the development of seabed trenches associated with anchor chains in front of suction anchors. The issue was first highlighted by Bhattacharjee et al . (2014 ) in relation to the Serpentina FPSO located offshore Equatorial...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27870-MS
... or conservatism as the renewable industry moves forward with the installation of offshore energy converters. anchor mec consequence class ocean energy tidal current offshore technology conference oil and gas renewable energy selection return period application installation requirement anchor...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27618-MS
... differential to anchor into the casing above the section to be removed while pulling as much as 1.8 million pounds through a casing spear that is engaged in the cut section. The pulling force is focused between two downhole anchor points, isolating the high loads from the derrick. This isolation protects...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27644-MS
... Dahlberg , R. ( 1998 ), " Design procedures for deepwater anchors in clay ", Proceedings of Offshore Technology Conference , Paper OTC 8837, Houston , 1998 . Evans , I ( 1965 ), " The force required to cut coalwith blunt wedges ", International Journal of Rock Mechanics...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27295-MS
...OTC-27295-MS Pipeline Walking Mitigation by Anchor In-Line Structures with the Use of a Hybrid Subsea Foundation Jasmina Demel, Regis Wallerand, Nicolas Rebours, Mersina Cafi, Florent Grelon, and Guy Mencarelli, Subsea 7; Paulo Gioielli, and Olanrewaju Olayera, ExxonMobil Copyright 2016, Offshore...

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