| 摘要 |
A gas trap is provided for liberating subterranean gases entrained in drilling muds. The trap comprises a pair of opposing truncated right circular vessels and having a concentric bottom mud inlet, a side mud outlet and a gas outlet at the top. A hollow shaft stirrer depends vertically and concentrically within the trap and has radial tubes extending from its lower end for forming a continuous bore within the shaft. The radial tube ends are bevelled on the trailing edge. Ports are formed at the top of the hollows shaft. The trap is partially immersed in mud forming a mud level in the trap and a freeboard area above containing air. When rotated, the hollow shaft spins the mud forming a turbulent low pressure area at the bevels, drawing air down the shaft from the upper ports and injecting air into the mud, all of which aids in liberating gases from the mud.
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