Topic
Overpressure
About: Overpressure is a research topic. Over the lifetime, 3236 publications have been published within this topic receiving 34648 citations.
Papers published on a yearly basis
Papers
More filters
Journal Article•
TL;DR: In this paper, a new style of overpressure fluid flow, namely late-stage overpressure fluids, was found and verified in Yinggehai Basin on the basis of comprehensive study of the formation pressure structure, distribution and development mechanism of diapers, and the effects of over pressure fluid flow.
Abstract: A new style of overpressure fluid flow,namely late-stage overpressure fluid flow, was found and verified in Yinggehai Basin on the basis of comprehensive study of the formation pressure structure, distribution and development mechanism of diapers, and the effects of overpressure fluid flow. Different from the overpressure fluid flow model of Cartwright, the overpressure fluid flow in Yinggehai Basin was in a closed system in the early stage and expulsed in a focused manner through diapers in the late stage. The focused flow of overpressure fluids resulted in the late-stage, episodic and rapid accumulation of natural gases. The trap of DFl-1 gas field was formed in the Quaternary, and the minimum average injection rate of the DFl-1 gas field was estimated to be up to 140 cubic meters per day. The inter-reservoir compositional heterogeneities,the transient state thermal effects resulted from fluid activities and the strong migration fractionation reflected the non-continuous fluid flows,rapid changes in temperature-pressure conditions during fluid migration and inter-action of multi-stage injected fluids, which could become the effective parameters for identifying episodic fluid migration.
16 citations
TL;DR: In this paper, the relationship between the flame propagation and external overpressure is summarized, and the variations in the pressure peaks of the internal pressure curves are also discussed in a 2-m-long cylindrical tube under the influences of the hydrogen concentration and vent burst pressure.
16 citations
TL;DR: In this article, the suppression effects and mechanisms of ABC powder on ethylene gas (C2H4)/polyethylene (PE) hybrid explosion, to explore the suppression characteristics of gas-solid two-phase explosion, were used for the test of the explosion overpressure.
16 citations
TL;DR: In this article, the Fourier cosine series is used to estimate the fluid overpressure of a fracture subject to an overpressure that varies irregularly along the length of the fracture.
16 citations
Patent•
23 May 1990
TL;DR: In this paper, a tensioning device for chain or belt drives comprising a damping piston guided in a cylindrical housing and loaded in the chain tensioning direction by a compression spring is described.
Abstract: A tensioning device for chain or belt drives comprising a damping piston guided in a cylindrical housing and loaded in the chain tensioning direction by a compression spring located in the housing, wherein a high pressure chamber for hydraulic fluid is situated between the housing bottom and the damping piston and is open via a leakage gap formed by the guide bore of the housing and the damping piston and closed with respect to an oil reservoir by a non-return valve, the hydraulic pressure in the high pressure chamber during the operation of the tensioning device being higher in the cold state than in the heated state due to differences in viscosity, characterized in that the high pressure chamber is delimited by an additional piston acting as an overpressure piston on which a second compression spring acts in the direction of the high pressure chamber, the overpressure piston being able to bear against a fixed stop and the spring force of the second compression spring and the effective surface of the overpressure piston are so dimensioned that in the cold state, the overpressure piston is displaceable by the force applied to it by the hydraulic pressure and in the heated state, it is retained at the fixed stop by the second compression spring.
16 citations