Given that there is variable diameter in the shale gas plunger lift wellhead, which causes cannot run up and down well affects effect of drainage production, paper carries out research on liner tube without wellhead installation methods, makes consistent with oil pipe, ensure can be open Christmas tree, facilitate periodic inspection replacement operation plunger, reduces cost salvage operation...

ii ACKNOWLEDGMENTS I would like to acknowledge the following for completion of this thesis: God for giving me the patience, guidance and strength to succeed in this research. I am so grateful for everything I have been given and everything I was able to do. Without God I can do nothing. Dr. Nandita Basu for challenging and guiding me throughout graduate school and this research. I have grown an...

Drainage pipe blockage resulting from crystals is one of the causes for cracking and leakage tunnel lining. Therefore, effective prevention drainage caused by crucial to ensure safety stability lining structures during operation system. Based on a large number indoor model tests numerical simulation analyses, binding energy between four materials calcium carbonate aqueous solution (“solid + liq...

A wide variety of desirable antenna beam patterns can be synthesized by optimal excitation and phasing the HE11 HE12 modes in scalar corrugated feedhorns. However, bandwidth such two-mode horns is often limited modal dispersion. In this paper we introduce a class low dispersion, feedhorns that operate, some cases, over operating bandwidths 40-50%. We provide example designs include with high co...

Turbulent heat transfer in Helically Corrugated Tubes (HCT) was numerically investigated for pure water and SiO2 nanofluid using Computational Fluid Dynamics (CFD). This study was carried out for different corrugating pitches (5, 7, 8 mm) and heights (0.5, 0.75, 1.25 mm) at various Reynolds numbers ranging from 5000 to 13300. The effect of nanoparticles on heat transfer augmentation for plain t...

Spatially regulated transcription of the pipe gene in ventral cells of the Drosophila ovary follicle cell epithelium is a key event that specifies progeny embryo dorsal-ventral (DV) polarity. pipe encodes ten putative protein isoforms, all of which exhibit similarity to vertebrate glycosaminoglycan-modifying enzymes. Expression of one of the isoforms, Pipe-ST2, in follicle cells has previously ...

Through the implementation of high standard farmland construction project, original other grasslands in project area have been developed, irregular land has leveled, excavation irrigation pipe trench and matching fittings improved shortage drainage facilities area, greatly improving conditions farmland, effectively preventing loss soil fertility, promoting development potential production, comp...

The geological resources of salt cavern gas storage in China are mostly complex layered beds with many thin inter-layers and high insoluble matter content. In the process cavity-building by water-solution method, matters layers peeled off deposited at bottom cavern, occupying more than one-third whole cavity volume. These sediments have a large pore volume strong compressibility, they filled br...

Subsea pipelines buried in the seabed may undergo large lateral displacement under environmental, operational, and accidental loads at different interaction rates hence drainage conditions. The undrained shear strength is commonly used practice to assess pipe-soil assuming a sufficiently high rate. This approach neglects consolidation effects rate-dependent response of soil significantly undere...

Currently, most of the studies using optimization algorithms to mitigate urban flooding problem have no more than three objectives, and few them take operation status traditional drainage system as one which is not conducive overall design city. This study proposes by a sponge-type comprehensive pipe corridor rainwater chamber. A four-objective model established coupling Storm Water Management ...