the blood–air barrier alveolar–capillary barrier or membrane exists in the gas exchanging region of the lungs.it exists to prevent air bubbles from forming in the blood, and from blood entering the alveoli.it is formed by the type 1 pneumocytes of the alveolar wall, the endothelial cells of the capillaries and the basement membrane between the two cells.
a geothermal heat pump ghp or ground source heat pump gshp is a central heating and/or cooling system that transfers heat to or from the ground. it uses the earth all the time, without any intermittency, as a heat source in the winter or a heat sink in the summer .
the dry combat submersible dcs is a midget submarine designed and manufactured for ussocom by msubs ltd, a uk company located in plymouth, devon. msubs are an underwater r&d company that have built a number of specialist unmanned and manned submersibles, primarily for the us dod. msubs is wholly owned by submergence group llc, a small texas based company that provides the linkages into the .
depending on the type of lift system and wellhead a rod rig or flushby can be used to change a pump without pulling the tubing. enhanced recovery methods such as water flooding, steam flooding, or co 2 flooding may be used to increase reservoir pressure and provide a 'sweep' effect to push hydrocarbons out of the reservoir.
a pumpjack is the overground drive for a reciprocating piston pump in an oil well. it is used to mechanically lift liquid out of the well if not enough bottom hole pressure exists for the liquid to flow all the way to the surface. the arrangement is commonly used for onshore wells producing little oil. pumpjacks are common in oil-rich areas .
a lift-check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. a guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. when the pressure is no longer higher, gravity or .
gas reinjection is the reinjection of natural gas into an underground reservoir, typically one already containing both natural gas and crude oil, in order to increase the pressure within the reservoir and thus induce the flow of crude oil or else sequester gas that cannot be exported.this is not to be confused with gas lift, where gas is injected into the annulus of the well rather than the .
the term 'gas-reinjection' is also sometimes referred to as repressuring--the term being used only to imply that the pressure inside the well is being increased to aid recovery. injection or reinjection of carbon dioxide also takes place in order to reduce the emission of co 2 into the atmosphere, a form of carbon sequestration .
gas reinjection and lift each use associated gas, carbon dioxide or some other inert gas to reduce the density of the oil-gas mixture, and thus improve its mobility. the typical recovery factor from water-flood operations is about 30%, depending on the properties of the oil and the characteristics of the reservoir rock.
john r. clarke born november 20, 1945 is an american scientist, private pilot and author. he is currently the scientific director at the united states navy experimental diving unit nedu . clarke is recognized as a leading authority on underwater breathing apparatus engineering.
water injection pumps. the high pressure, high flow water injection pumps are placed near to the de-oxygenation tower and boosting pumps. they fill the bottom of the reservoir with the filtered water to push the oil towards the wells like a piston. the result of the injection is not quick, it needs time.
a condensate pump is a specific type of pump used to pump the condensate produced in an hvac heating or cooling , refrigeration, condensing boiler furnace, or steam system. applications. condensate pumps may be used to pump the condensate produced from latent water vapor in any .