I'm a project engineer currently working on a project designing an SSIV (subsea isolation valve) system. The umbilical size is 4-inch, and the pulling head is about 6-inch but the pipeline/subsea consultant has proposed that the umbilical J-tube diameter to be 16". To me this seems to be an...
I'm a subsea engineer with mechanical background. Recently I was assigned to a project which require design of a subsea umbilical, which will comprise bundle of hydraulic and chemical tubes as well as power and signal cable. Being a mechanical guy, I really need some basic idea on the power...
I have a subsea gas well with reasonable amount of water content. Tieback distance to the host platform is about 5 miles, and it is an 8" pipeline. Initial calculations show that there'll be slugging. So my flow assurance engineer advises periodical pigging operation.
My question is, is there...
Thanks DrillerNic.
Another option that I'm considering is to have automated subsea launcher, where you slot in couple of pigs into the launcher (you need longer traps, and some sort of valves or barrier between each pig, of course,and release one at each desirable time, using timer, or remote...
BigInch,
Apology for not being clear enough. It is a gas field with high condensate ratio, also with potentially corrosive fluid.
Apart from slugging (which is not that bad actually), the client wanted some means to assess the pipeline integrity from time to time- e.g. wall thickness losses...
Really appreciate all the responses.
Indeed, the keyword here is "marginal", i.e. how to deliver the most optimized two-well subsea project from life cycle cost point of view. Obviously when talking about life-cycle-cost, critirea such as operability, maintainability, reliability etc are...
I'm currently working on an oil and gas subsea project whereby the client plans to tie-back a two-well marginal field (to a common manifold, and then) to their host facility, which is some 8 miles away.
As part of the given operating philosophy, they'd like to have the pipeline piggable. The...
I'm a facilities engineer who has just started to venture into subsea production system. My question, is it technically possible to drill shallow water subsea well (say around 300ft water depth) from a jack-up rig or a tender-assist barge? If not, why?
I'm just curious because in this part...
In most pig trap design that I've encountered, there a 2 pig trap barrels, a major barrel and a minor barrel, connected with a reducer.
Why do we need two barrels? Can't it be just long single size barrel?
Is there any rules/codes or formula to determine minimum length of bolts for flange, both RF and RTJ? What are major parameters required to decide the length?
Hi,
I'm working on a detail design for an ofshore platform vent snuffing system. The vent system, in the first place is not meant for continuous venting; it is thre only for upset cases. Max venting rate will be 40mmscf. And this platform is unmanned.
The client is asking us to design a CO2...
Hi all,
Can someone help me on CO2 snuffing for offshore platform vent stack. I mean, does anyone know any guidelines or standards that could guide in calculations of number of CO2 bottles required for the snuffing operations.
I know B31.4 is meant for liquid pipeline transportation, whereas B31.8 is for gas transmission.
Apart from this distiction, I would really appreciate if someone can tell me what are the major differences between these codes.
Is there any standard/best practices/rule of thumb exist on how to obtain a pipeline age derating factor?
I'm currently working on an old (15 yrs) subsea 18" crude oil pipeline which need to be revived.
I understand that the best way is to do physical inspections, which might include...
