ODESSA

About: ODESSA is a based out in . It is known for research contribution in the topics: Population & Stars. The organization has 8058 authors who have published 8092 publications receiving 63228 citations.

Adjustable stuffing boxes for pump rods

Abstract: Stuffing boxes for use with reciprocating or rotating pump rods for downhole pumps include a lower housing adapted to be mounted on a wellhead and provided with internal bores for receiving the pump rod and a packing housing engaged with the lower housing and including a central bore for receiving a packing assembly and a packing gland. The packing gland may include an annular flange for supporting circumferentially spaced bolts engageable with cooperating bores in the packing housing to adjust compression on the packing and to provide for rotatably indexing the gland to minimize uneven wear. An axially slidable bushing mounted in the packing housing or lower housing is engageable with the opposite end of the packing assembly and is provided with a transverse annular shoulder engaged by a bias spring for exerting compression forces on the packing assembly. The bushing includes a transverse end face exposed to pressure fluid to also urge the bushing into engagement with the packing assembly. An annular cavity for the bushing bias spring may be filled with a lubricant at neutral pressure provided by equal diameter portions of the bushing. An annular packoff element may be disposed in the lower housing and engaged by the packing housing to form a temporary seal during repair or replacement of the packing assembly and/or the packing gland.

Gas-disperse synthesis of metal oxide particles

Abstract: The main results of years of research of metal dust flames aimed at the development of the scientific basis for the method of gas-disperse synthesis of metal oxide nanopowders are discussed. Methods of burning metal dust in oxide-containing media, the key problems of gas-disperse synthesis, and possible ways to solve these problems are considered. The ways of controlling the disperse composition of vapor-phase and gas-phase combustion products of metal particles by variation of the macroparameters of the dust flame and ionization of condensed and gaseous phases in the combustion zone with the help of adding easily ionized atoms to the fuel are analyzed. It is shown that an adequate description of condensation in a flame is impossible without consideration for the influence of electrophysical processes on nucleation and coagulation in the flame. It is established that ionization of the condensed phase is the most significant factor during coagulation of nano-oxide particles in a dust flame. This allows expecting that the influence on particle ionization may turn out to be an effective method of controlling the dispersion of the target products of gas-disperse synthesis.

LTE EPS network with self-similar traffic modeling for performance analysis

Abstract: An important task in parametric synthesis of telecommunications network such as EPS network is to determine QoS parameters when traffic processed on EPS network nodes. In this conference paper, presented mathematical models for the calculation of QoS parameters such as delay and loss probability taking into account properties of self-similar traffic. This modeling based on model P/P/1 with Pareto distribution function for between packet intervals and processing time for case then intervals between packets and the duration of processing on servers are limited. Proposed model compared with model with log-normal and Weibull distribution of packet processing time and M/M/1 model.

Methods and apparatuses for reducing emissions of volatile organic compounds from pumps and storage tanks for VOC-containing fluids

Abstract: A method is provided for reducing emissions of a volatile organic compound (“VOC”) from a source of the VOC. The method includes the steps of: (A) operatively positioning a VOC-absorbing material between the source of the VOC and the atmosphere, wherein the VOC from the source of the VOC must pass through the VOC-absorbing material before being vented to the atmosphere, and wherein the VOC-absorbing material comprises: (i) a permeable substrate; and (ii) a stripper for the VOC; and (B) exposing the stripper of the VOC-absorbing material to bacteria, wherein the bacteria is selected for being capable of converting the VOC to another compound. A method for pumping a fluid from a low-pressure fluid source to a high-pressure fluid outlet and a method for storing or transporting a fluid are also provided, wherein the fluid comprises a VOC.

About influence of differential rotation in convection zone of gaseous or fluid giant planet (Uranus) onto the parameters of orbits of satellites

Abstract: Tidal interactions between planet and its satellites are known to be the main phenomena, which are determining the orbital evolution of the satellites. We suggest in the current research to take into consideration the additional well-known effect of differential rotation which obviously takes place in the gaseous or fluid convection zone of primary giant planet (indeed, the aforementioned effect exists even not depending on the orbital evolution of satellites around host planet). Nevertheless, estimations for the contribution of the aforementioned effect of differential rotation in the Uranus system (including all its most massive satellites) let us exclude using such effect from calculations of mutual evolution of the eccentricity e along with the semi-major axis a for all satellites of Uranus (planet of “ice” type). It means that the Uranus can be considered in the analytic exploration of governing equations as to be the appropriate candidate for applying the modern ansatz (Efroimsky in Astron J 150:98, 2015) (tidal dissipation effect depending on the tidal-flexure frequency χ) in regard to estimations of eccentricity e along with semi-major axis a for satellites of Uranus. We can see from the results of calculations in Sect. 3 that the combined system of governing equations (in the sense of combined contributions to the tidal dissipation from Uranus + from satellite) yields the really observed magnitudes of decelerations for semi-major axes of all the satellites of Uranus. Meanwhile, internal heat generation effects in the satellites (due to tidal dissipation effect) are much more than those which definitely take place in the Uranus, excepting the case of Ariel.