Vacuum tank degasser & Atmospheric Degasser

Nov. 27, 2009 - PRLog -- There two types of Vacuum degasser Types,one is called Vacuum tank degasser,the other is called Atmospheric Degasser,it is also called gas buster.

A Vacuum degasser is a device that removes air or gases (methane, H2S, CO2 and others) from drilling liquids. There are two generic types that work by both expanding the size of the gas bubbles entrained in the mud (by pulling a vacuum on the mud) and by increasing the surface area available to the mud so that bubbles escape (through the use of various cascading baffle plates). If the gas content in the mud is high, a mud gas separator or "poor boy degasser" is used, because it has a higher capacity than standard degassers and routes the evolved gases away from the rig to a flaring area complete with an ignition source.

http://oilfield.gnsolidscontrol.com/china-vacuum-degasser-manufacturer/

For small amount of entrained gas in a drilling fluid, the degasser can play a major role of removing small bubbles that a liquid film has enveloped and entrapped. In order for it to be released and break out the air and gas such as methane, H2S and CO2 from the mud to the surface, the drilling fluid must pass degassing technique and it can be accomplished by the equipment called degasser which is also a major part of a mud systems.


Vacuum Tank Degasser
(http://www.gnsolidscontrol.com/vacuum-degasser/)

Vacuum Type is the most common form of degasser. It can be horizontal, vertical or round vessel. A vacuum action is created to pull in the gas cut mud. When the liquid enters the tank it will flow and be distributed to a layer of internal baffle plates designed for the mud to flow in thin laminar film and is exposed to a vacuum that forces the gas to escape and break out of the mud.The vacuum pump moves the escaping gas from the vessel discharging it to the rig's flare or environmental control system.

Atmospheric Degasser

This type of degasser processes mud by accelerating fluid through a submerged pump impeller and impinging the fluid on a stationary baffles to maximize surface and thus enable escaping gas vent to atmosphere.

The Fluid Systems Atmospheric Degasser removes retained gas from  drilling muds. Atmospheric degassers  process mud by accelerating fluid
through a submerged pump impeller  and impinging the fluid on stationary baffles to maximize surface area and thus enable gasses to escape to the
atmosphere.  As with all processing equipment the  process rate is dependent upon solids  content and fluid viscosity. Processingrates are therefore dependent on mud properties.


Gas buster  [Well Workover and Intervention]    
http://oilfield.gnsolidscontrol.com/gas-buster-atmospheri...

A simple separator vessel used to remove free or entrained gas from fluids circulated in the wellbore, such as mud used during drilling operations. The gas buster typically comprises a vessel containing a series of baffles with a liquid exit on the bottom and a gas-vent line at the top of the vessel.

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