THE EVALUATION AND SIZING OF MUD/GAS SEPARATOR

A mud/gas separator (poor boy degasser) sizing worksheet will assist drilling personnel with the sizing calculations. The worksheet provides a quick and easy evaluation of most mud/gas separators for a specific well application. A brief discussion of other mud/gas separator considerations is provided, including separator components, testing, materials, and oil-based-mud considerations. This paper reviews and analyzes existing mud/gas separator technology and recommends separator configuration, components, design considerations, and a sizing procedure. A simple method of evaluating mud/gas separation within the separator vessel has been developed as a basis for the sizing procedure.

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Mud gas separators

Principle: Simply speaking, mud gas separator is used to separate the invaded gas among drilling fluid. Transfer the gas to the flare ignitor or the gas storage unit.The drilling fluid with gas will flow into mud gas separator from a high pressure hose under the gravity of the gas will be removed to the vent line and flow to the line end. If the gas has become bubbles the blade on the vessel wall will break them down let gas flow out of degasser vessel.

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Pressurized, or Closed, Separators

 Modified Production Separators

The major advantages of a closed pressurized separators are that it
(1) controls gas from the well and sends it to a flare line under pressure and (2) is serviced by a special crew.


The separator is usually operated under 3 to 5 atmospheres of pressure
(45 to 75 psig). Horizontal units are typically about 9 feet in diameter
and 50 feet long, with a throughput of 5 MMcf or 500 bbl fluid. These are
typical numbers, and sizes and pressure vary according to special jobs.

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