Design of a Cyclonic-Jetting and Slurry-Transport System for Separators
Sand and solids are removed from production separators either off line (shut down for physical removal) or on line by use of jetting systems. Traditional jetting designs use spray nozzles to fluidize and push the sand toward a covered outlet to evacuate the solids from the vessel. Cyclonic-jetting technology combines the fluidi- zation and evacuation functions into a single, compact device. On the basis of a hydrocyclonic platform, this technology converts jet- ting spray water into shielded vortex flow that fluidizes sand in a circular zone without disturbing the oil/water interface.
Total solids removal is primarily a function of set height, spray flow, and spacing. A single unit was optimized at a set height of 10 cm (4 in.) with spray pressure of 0.7 barg (11 psig) to provide an area of influence of 1.1 m² (12.0 ft²) with 28 cm (11 in.) of sand- bed depth. Placing two units in parallel with overlap of their af- fected zones reduces the “egg-carton” effect associated with this technology; however, optimum operation, in terms of total sand re- moved, occurs when the units do not overlap. Slurry at up to 60 wt% solids is transported from the jetting system to the handling equipment. The boundary design conditions for slurry transport are erosion velocity (upper limit) and particle-transport velocity (lower limit). By use of published models, the piping design for a four- unit cluster of cyclonic-jetting devices was validated at 5.0-cm (2- in.) nominal size. Integration and operation of a jetting system with transport, dewatering, and disposal stages of facilities sand man- agement are presented as guidelines for system design.
Greedy Pursuit: Algorithms Show Promise in Measuring Multiphase Flow
“Greedy pursuit” in the realm of algorithms is a good thing. Saudi Aramco studied such algorithms to produce images simulating the flow inside a pipe’s cross section, possibly reducing the need for separator-based multiphase flowmeters.
Savvy Separator: 5 Lessons To Simplify Separator Troubleshooting
Troubleshooting and solving separation problems takes a combination of analytical tools, experience, and a knack for investigation. These 5 lessons provide a starting point for assessment.
Savvy Separator: Oversizing Separators—Too Much of a Good Thing?
Oversizing a separator ensures meeting the life cycle needs of a facility, but are we setting ourselves up for failure in the long run? With peak rates typically being short-lived at best, or at worse, well beyond actual production rates, more weight needs to be given to the tail-end of production.
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.
24 October 2018
06 November 2018
07 November 2018
24 October 2018