Improved Paraffin-Deposition-Profile Estimation in Hydrocarbon Pipelines and Effective Mitigation Review
Flow of paraffinic hydrocarbon liquids within extended pipeline networks or wells, where the environment/bulk temperature is below the cloud point or wax-appearance temperature (WAT), could result in precipitation of wax from the bulk fluid. Precipitated wax crystals from crudes deposits on the inner pipe wall could lead to reduced flow area or even complete blockage and could present a costly problem in the production and transportation of petroleum products. Timely removal of such deposits is extremely important to avoid associated problems.
This paper illustrates a numerical approach to estimate the deposition profile and its effect on flow-related parameters. Later, the procedure is validated with field data from a North Sea offshore production facility. This paper also seeks to propose a feasible solution to avoid such flow-assurance issues; in doing so, current commonly practiced reduction and preventive methods are reviewed. Previously, providing thermal insulation with aerogel foam had proved to be the most effective option in preventing wax from precipitating. A relatively new approach is discussed in this paper, which allows for minimizing the usage of insulation material in an attempt to reduce the implementation cost of the proposed precaution. Theoretical implementation of the procedure was also conducted to identify its effectiveness, which was later found to be elimination of the deposition completely.
Phillips 66 Forms JVs To Boost Takeaway Capacity from Bakken and Permian
Phillips 66 and partners in two separate joint ventures are building the Red Oak and the Liberty pipeline systems to deliver a total of approximately 750,000 BOPD to the US Gulf Coast with startup of service in early 2021.
Cactus II Pipeline To Start Partial Service in the Permian by Year End
Approximately 90% of construction work has been completed on the pipeline, which is expected to transport up to 670,000 BOPD from the Permian Basin to the US Gulf Coast. Cactus II is one of several pipelines aimed at alleviating takeaway concerns in the Permian.
Can Robots Improve Above-Water Riser Inspections?
The criticality of above-water riser hull piping requires frequent inspections. Traditional manual inspection methods present safety and efficiency concerns, but work is being done to see if robotic technologies—such as drones and crawlers—can do the job as good as, or even better, than humans.
Don't miss out on the latest technology delivered to your email every two weeks. Sign up for the OGF newsletter. If you are not logged in, you will receive a confirmation email that you will need to click on to confirm you want to receive the newsletter.
18 June 2019
19 June 2019