A series of trays with sieves that vibrate to remove cuttings from the circulating fluid in rotary drilling operations is called the __________.

Correct Answer: Option B — shale shaker

Shale shakers are the primary solids-control equipment on a drilling rig. They utilize vibrating screens to separate drilled cuttings from the circulating drilling fluid. This process is essential for maintaining fluid properties and preventing the recirculation of solids, which could damage pumps and downhole tools.