Line Type Optimization of the Flexible Jumper for New Generation Subsea Suspended Manifold Production System

2021 ◽  
Author(s):  
Yingying Wang ◽  
Weizheng An ◽  
Zhigang Li ◽  
Wentao luo ◽  
Menglan Duan
Keyword(s):  
Production System ◽  
Flexible Jumper ◽  
New Generation ◽  
Line Type

Line Type Optimization of the Flexible Jumper for New Generation Subsea Suspended Manifold Production System

2021 ◽  
Author(s):  
Yingying Wang ◽  
Weizheng An ◽  
Zhigang Li ◽  
Wentao luo ◽  
Menglan Duan
Keyword(s):  
Production System ◽  
Flexible Jumper ◽  
New Generation ◽  
Line Type

Line Type Optimization of the Flexible Jumper for New Generation Subsea Suspended Manifold Production System

2020 ◽  
Author(s):  
Weizheng An ◽  
Zhigang Li ◽  
Wentao Luo ◽  
Yingying Wang ◽  
Menglan Duan
Keyword(s):  
Production System ◽  
Oil And Gas ◽  
Tensile Force ◽  
Great Influence ◽  
Hydrodynamic Performance ◽  
Bending Radius ◽  
Subsea Production System ◽  
Flexible Jumper ◽  
New Generation ◽  
Line Type

Abstract A new generation of subsea production system with the suspended manifold as the major characteristic was proposed to solve the disadvantages for hard to be discarded and recovered for the traditional subsea manifold fixed in seabed. Here, the flexible jumpers connecting the dry trees in the subsea functional chamber to the suspended manifold, can not only provide enough mooring forces as the mooring system, but also transport oil and gas from dry trees, which is an indispensable part of a complete new generation of subsea production system. So how to optimize the flexible jumpers to guarantee a good hydrodynamic performance is quite essential. In this paper, a steep wave type of flexible jumper is optimized by changing the suspended height, connection width, and position and diameter of the buoyancy block. The result shows that the location and the size of the buoyancy block both have a great influence on the distribution of the mechanical property and the line type of the flexible jumper while the influence of suspended height and connection width is very small. Calculations and analysis demonstrated that changing the position of the buoyancy block has no effect on the maximum tensile force of the flexible jumper, but the farther the buoyancy block is from the seabed, the larger the minimum bending radius of the flexible jumper is. Meanwhile, the larger the diameters of buoyancy block becomes, the larger the maximum tensile force is, and the smaller the minimum bending radius will be.

SPALAX new generation: New process design for a more efficient xenon production system for the CTBT noble gas network

2015 ◽  
Vol 149 ◽  
pp. 43-50 ◽  
Author(s):  
Sylvain Topin ◽  
Claire Greau ◽  
Ludovic Deliere ◽  
Alexandre Hovesepian ◽  
Thomas Taffary ◽  
...  
Keyword(s):  
Process Design ◽  
Production System ◽  
Noble Gas ◽  
Gas Network ◽  
New Process ◽  
New Generation

Free Standing Risers for Extended Ultra Deepwater Tests

2004 ◽  
Author(s):  
Roberto Rodrigues ◽  
Renato Branda˜o Mansano ◽  
Cesar Del Luchesse Junior ◽  
Francisco Edward Roveri ◽  
Mauricio Barbosa
Keyword(s):  
Production System ◽  
Net Present Value ◽  
Drill Pipe ◽  
Christmas Tree ◽  
Production Flow ◽  
Free Standing ◽  
Sea Bed ◽  
Implementation Costs ◽  
Early Production ◽  
Flexible Jumper

Petrobras presently has a significant part of its reserves located in deep and ultra deep waters. To produce this oil economically Petrobras created the well-known research program PROCAP 3000. This paper presents one project being developed under such program, the Extended Test for Deep and Ultra Deepwater. Petrobras has been using early production system and extended test for some years. Since 1998 Petrobras has been testing wells (extended test) with the Seillean FPSO (Floating Production Storage and Offloading). One challenge in this concept is the use of a dynamically positioned (DP) tanker with a rig and a threaded pipe (drill pipe riser) to produce and test wells in deep and ultra deep water. Another challenge is the frequency of changes of location of the FPSO, since the objective of an extended test is to produce for periods of three to twelve months. Therefore the system must have enough flexibility to make the installation and recovery easier. The proposed Itinerant Production and Evaluation Pilot System concept is easy to deploy and demobilize for extended trials. Under certain circumstances, it may even work as an Early Production System. It consists of a free-standing drill pipe riser system connected directly to the Christmas tree at the sea bed and to an air can at the top, which is located around 100 metes below sea surface. A flexible jumper links the air can to an FPSO. To improve production flow rate, an electric submersible pump (ESP) is installed at either downhole or at the top of Christmas tree. The main purpose of the extended test is to collect data, enhancing knowledge of the reservoir through more reliable information. Although attempting to minimize implementation costs, it may present a negative Net Present Value for shorter periods, especially if the value of the information obtained is not included in the calculation. Most of these ideas and concepts are still under study, and some of them will certainly be reassessed, reviewed and possibly improved. Petrobras has been working with some partner companies to develop the conceptual study and assess the system feasibility. This paper presents the main issues involved in this project. The objective of this paper is to summarize a preliminary conceptual design to conduct a feasibility analysis for Petrobras’ Free Standing Drill Pipe Riser (FSDPR).

Finding the Right Problems: Some HREM Applications to Interfaces

1984 ◽  
Vol 42 ◽  
pp. 376-379
Author(s):  
D. Cherns
Keyword(s):  
Grain Boundaries ◽  
High Resolution Electron Microscopy ◽  
Boundary Structure ◽  
Atomic Structures ◽  
Grain Boundary Structure ◽  
Resolution Electron ◽  
Point To Point ◽  
The Right ◽  
New Generation ◽  
Better Than

The use of high resolution electron microscopy (HREM) to determine the atomic structure of grain boundaries and interfaces is a topic of great current interest. Grain boundary structure has been considered for many years as central to an understanding of the mechanical and transport properties of materials. Some more recent attention has focussed on the atomic structures of metalsemiconductor interfaces which are believed to control electrical properties of contacts. The atomic structures of interfaces in semiconductor or metal multilayers is an area of growing interest for understanding the unusual electrical or mechanical properties which these new materials possess. However, although the point-to-point resolutions of currently available HREMs, ∼2-3Å, appear sufficient to solve many of these problems, few atomic models of grain boundaries and interfaces have been derived. Moreover, with a new generation of 300-400kV instruments promising resolutions in the 1.6-2.0 Å range, and resolutions better than 1.5Å expected from specialist instruments, it is an appropriate time to consider the usefulness of HREM for interface studies.

Total etch dentin bonding systems: scanning electron microscopy of the resin-dentin hybrid layer

1992 ◽  
Vol 50 (2) ◽  
pp. 1092-1093
Author(s):  
Jorge Perdigao
Keyword(s):  
Composite Resin ◽  
Mechanical Interlocking ◽  
Hybrid Layer ◽  
Agent Based ◽  
Dentin Bonding ◽  
Acid Agent ◽  
Bond Strengths ◽  
Main Component ◽  
Bonding Systems ◽  
New Generation

In 1955, Buonocore introduced the etching of enamel with phosphoric acid. Bonding to enamel was created by mechanical interlocking of resin tags with enamel prisms. Enamel is an inert tissue whose main component is hydroxyapatite (98% by weight). Conversely, dentin is a wet living tissue crossed by tubules containing cellular extensions of the dental pulp. Dentin consists of 18% of organic material, primarily collagen. Several generations of dentin bonding systems (DBS) have been studied in the last 20 years. The dentin bond strengths associated with these DBS have been constantly lower than the enamel bond strengths. Recently, a new generation of DBS has been described. They are applied in three steps: an acid agent on enamel and dentin (total etch technique), two mixed primers and a bonding agent based on a methacrylate resin. They are supposed to bond composite resin to wet dentin through dentin organic component, forming a peculiar blended structure that is part tooth and part resin: the hybrid layer.

Low-voltage, high-resolution scanning electron microscopy of polymers

1987 ◽  
Vol 45 ◽  
pp. 466-467 ◽  
Author(s):  
S. J. Krause ◽  
W.W. Adams ◽  
S. Kumar ◽  
T. Reilly ◽  
T. Suziki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Low Voltage ◽  
Chromatic Aberration ◽  
Image Resolution ◽  
Resolution Limit ◽  
Crossover Point ◽  
New Generation ◽  
Beam Damage ◽  
Scanning Electron

Scanning electron microscopy (SEM) of polymers at routine operating voltages of 15 to 25 keV can lead to beam damage and sample image distortion due to charging. Imaging polymer samples with low accelerating voltages (0.1 to 2.0 keV), at or near the “crossover point”, can reduce beam damage, eliminate charging, and improve contrast of surface detail. However, at low voltage, beam brightness is reduced and image resolution is degraded due to chromatic aberration. A new generation of instruments has improved brightness at low voltages, but a typical SEM with a tungsten hairpin filament will have a resolution limit of about 100nm at 1keV. Recently, a new field emission gun (FEG) SEM, the Hitachi S900, was introduced with a reported resolution of 0.8nm at 30keV and 5nm at 1keV. In this research we are reporting the results of imaging coated and uncoated polymer samples at accelerating voltages between 1keV and 30keV in a tungsten hairpin SEM and in the Hitachi S900 FEG SEM.

3-Dimensional immunolabeling and in situ hybridization detection using fluorescence photooxidation and intermediate-voltage Electron Microscopy

1994 ◽  
Vol 52 ◽  
pp. 164-165
Author(s):  
Thomas J. Deerinck ◽  
Maryann E. Martone ◽  
Varda Lev-Ram ◽  
David P. L. Green ◽  
Roger Y. Tsien ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Reactive Oxygen ◽  
Confocal Laser Scanning Microscope ◽  
Fluorescent Dye ◽  
Confocal Laser ◽  
3 Dimensional ◽  
Voltage Electron ◽  
Dimensional Distribution ◽  
Electron Microscopes ◽  
New Generation

The confocal laser scanning microscope has become a powerful tool in the study of the 3-dimensional distribution of proteins and specific nucleic acid sequences in cells and tissues. This is also proving to be true for a new generation of high contrast intermediate voltage electron microscopes (IVEM). Until recently, the number of labeling techniques that could be employed to allow examination of the same sample with both confocal and IVEM was rather limited. One method that can be used to take full advantage of these two technologies is fluorescence photooxidation. Specimens are labeled by a fluorescent dye and viewed with confocal microscopy followed by fluorescence photooxidation of diaminobenzidine (DAB). In this technique, a fluorescent dye is used to photooxidize DAB into an osmiophilic reaction product that can be subsequently visualized with the electron microscope. The precise reaction mechanism by which the photooxidation occurs is not known but evidence suggests that the radiationless transfer of energy from the excited-state dye molecule undergoing the phenomenon of intersystem crossing leads to the formation of reactive oxygen species such as singlet oxygen. It is this reactive oxygen that is likely crucial in the photooxidation of DAB.

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