sludger
(ˈslʌdʒə(r))
[f. sludge v.]
An appliance for removing the sludge from a bore-hole, or for boring in quicksand.
| 1839 Ure Dict. Arts 966 The sludger, for bringing up the mud. 1851 Greenwell Coal-trade Terms Northumb. & Durham 9 Sludgers..are used when a bore-hole is so wet that the borings would..be washed out of the cylinder. 1871 W. Morgans Mining Tools 134 A sludger which is fitted with an inside piston..in order to suck the sludge into the cylinder. |