Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
offshore installation vs onshore installation
- Thread starter liamlucas
- Start date
- Thread starter
- #3
LittleInch
Petroleum
About 5 times the cost...
That's a very vague question. Can you elaborate a bit please.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
That's a very vague question. Can you elaborate a bit please.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
TugboatEng
Marine/Ocean
No grouting for offshore, chocking is used instead.
BEMPE16524
Mechanical
Cost, team, regulations, plannings... Etc.
R.Efendy
R.Efendy
Pretty much everything aside form the basic physics.
The environments are very different, corrosion is usually more of a factor offshore.
The safety factors are very different, offshore workers usually dont have the luxury of evacuating the site as easily.
The training required to simply visit/observe sites is very different bc of the aforementioned safety factors.
The cost of getting equipment onsite is very different bc shipping methods are different.
Etc.
The environments are very different, corrosion is usually more of a factor offshore.
The safety factors are very different, offshore workers usually dont have the luxury of evacuating the site as easily.
The training required to simply visit/observe sites is very different bc of the aforementioned safety factors.
The cost of getting equipment onsite is very different bc shipping methods are different.
Etc.
The word "installation" in the OP Title could have two meanings; final location or where the rotating equipment is moved into final location in plat/vessel. Ship machinery are typically installed for new construction or major repairs or at a dock with direct shore access. No experience with offshore platforms. Ship machinery can have more difficult acces space for installation and repairs.
Walt
Walt
BrianPetersen
Mechanical
Those of us who are being called upon as mind-readers (i.e. everyone except the original poster) has absolutely no clue what sort of "rotating equipment" the original poster is wishing to install "offshore" (?) versus "onshore".
The 9.9 horsepower Evinrude outboard motor - which contains "rotating equipment" in the form of the crankshaft and the propeller! - on my buddy's fishing boat is currently installed "onshore", on the boat, which is currently on a trailer in his driveway. Unfortunately, although this particular motor is capable of momentarily running when it is installed "onshore", it serves no purpose when running "onshore" other than confirming that the motor runs prior to hauling the boat to the dock, and it can be seriously damaged by doing so for more than a few seconds. The installation "offshore" in a nearby lake, works just fine.
Original poster needs to provide a MAJOR clarification, because my mind-reading capability is currently inoperative, and is expected to remain so for the foreseeable future. Dunno about anyone else's.
The 9.9 horsepower Evinrude outboard motor - which contains "rotating equipment" in the form of the crankshaft and the propeller! - on my buddy's fishing boat is currently installed "onshore", on the boat, which is currently on a trailer in his driveway. Unfortunately, although this particular motor is capable of momentarily running when it is installed "onshore", it serves no purpose when running "onshore" other than confirming that the motor runs prior to hauling the boat to the dock, and it can be seriously damaged by doing so for more than a few seconds. The installation "offshore" in a nearby lake, works just fine.
Original poster needs to provide a MAJOR clarification, because my mind-reading capability is currently inoperative, and is expected to remain so for the foreseeable future. Dunno about anyone else's.
BrianPeterson: what, isn't your crystal ball functioning?
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
- Thread starter
- #11
Rotating equipment that can typically be found in an offshore platform environment includes ALL the following: pump, fan, compressor, (search)light, crankshaft, propulsion shaft, anchor windlass, radar array, electric motor, electric generator, drill (bit) and drill (pipe), crane (drum). Depending on the platform, there may well be others that don't fall into these general categories.
Rotating equipment located onshore has several other types as well: extruders, rolling stands, ball mills, crushers, drive- and line-shafts, etc.
The biggest differential for rotating electrical equipment (motors and generators) between an onshore application and one located offshore is: environment (corrosion and moisture), cathodic protection, "solidity" of foundation structure, planarity of installation (offshore installations not only get installed at odd angles, they also have to deal with at least some roll and pitch), exposure (sun, rain, wind, etc.), transport (to the offshore facility), availability of repair and/or spares, cooling method(s), and so on.
Converting energy to motion for more than half a century
Rotating equipment located onshore has several other types as well: extruders, rolling stands, ball mills, crushers, drive- and line-shafts, etc.
The biggest differential for rotating electrical equipment (motors and generators) between an onshore application and one located offshore is: environment (corrosion and moisture), cathodic protection, "solidity" of foundation structure, planarity of installation (offshore installations not only get installed at odd angles, they also have to deal with at least some roll and pitch), exposure (sun, rain, wind, etc.), transport (to the offshore facility), availability of repair and/or spares, cooling method(s), and so on.
Converting energy to motion for more than half a century
what sort of "rotating equipment" ? OK "I can't tell you because ..." ...
ok what class of machine ? and what general category?
what sort of "platform" ? oil rig ??
is the same "platform" base used onshore and off ??
man, you've got to sound less like chatGTP and more like a human, and you've got to give us something to go on.
is this work, or a school project ??
if this is work, is this something you should know already ??
if this is school, there's a student forum.
"Wir hoffen, dass dieses Mal alles gut gehen wird!"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.
ok what class of machine ? and what general category?
what sort of "platform" ? oil rig ??
is the same "platform" base used onshore and off ??
man, you've got to sound less like chatGTP and more like a human, and you've got to give us something to go on.
is this work, or a school project ??
if this is work, is this something you should know already ??
if this is school, there's a student forum.
"Wir hoffen, dass dieses Mal alles gut gehen wird!"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.
In my experience offering small machinery, the materials, degree of safety (ATEX rating), and coating/painting requirements are vastly more strict for offshore. Replacing machinery on a platform is understandably disruptive and expensive logistically so it's understandable.
Whether or not machinery can be provided meeting all of those requirements is another question. The offshore design teams don't seem to consider that question until after they've put out their bids.
Whether or not machinery can be provided meeting all of those requirements is another question. The offshore design teams don't seem to consider that question until after they've put out their bids.
- Status
Similar threads
- Locked
- Question
- Locked
- Question
