Webany of various containers or machines similar in shape or action to a butter churn, as a device for mixing beverages. verb (used with object) to agitate in order to make into … WebOct 19, 2024 · The drilling order, location, depth, and size of churn-drill holes are shown in the following tabulation. The. drill sludge from the first 100 feet of holes in the vicinity of the channel proper was sampled intermittently. From that depth to bedrock each 5 feet was sampled carefully. The sludgs was weighed first and then passed through a rocker.
Sampling and Evaluation – Western Mining History
WebDefinition of Empire drill. i. A light, hand-operated churn drill for testing placers from 10 to 125 ft (3.0 to 38.1 m) deep, though it is more commonly used for shallower holes. It consists of a string of 4-in (10.2-cm) casing, to the lower end of which is screwed a toothed cutting shoe. To the upper part, projecting above the ground, is ... WebSep 28, 2010 · The churn drill, called a "Special Overhead Spudding Machine," was typical of the drills that contributed to the company's prosperity. The principle of churn drill … births and deaths perth wa
Churn - Wikipedia
WebDec 13, 2024 · Churn drills were created in the East as early as 221 BC under the Chinese Qin Dynasty, and could reach a depth of 1500 meters. Churn drills of ancient China were made of wood and required a lot of effort, yet they could drill through solid rock. During the 12th century, the churn drill first appeared in Europe. WebJan 11, 2014 · The churn drill was one of the most innovative and important tools for placer prospecting in Alaska. Prospectors used to sink shafts by hand many tens of feet to bedrock, often in frozen ground. Now they could test far more ground far faster and with less effort. From the attached article: WebChurn drill definition, a portable drill rig using a bit fashioned on a massive steel cylinder that is alternately lifted and dropped to drill a hole in earth and rock. See more. darethesystem.com