(under subclass 65) Processes comprising the making of a borehole or the performance of a reaming operation by the use of a stream of pressurized fluid to dislodge the earth formation.
(1) Note. Practically all drilling operations which use a circulating drilling fluid have jets in the drill head to wash loose cuttings away from the drill during operation and the claiming of such jetting or washing steps, even without the claiming of a step of using a drill, are excluded from this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11+, for processes by directly applying heat to fluidize or comminute which may include erosion.
422, for earth boring nozzles, per se, and the search there noted.
SEE OR SEARCH CLASS
166, Wells, 312, for well cleaning processes involving the use of a liquid introduced from the top of the well.
299, Mining or In Situ Disintegration of Hard Material,
17, for a process of breaking down valuable or hard material in situ by jetting.
405, Hydraulic and Earth Engineering,
55+, for the formation of an underground fluid storage cavity including a step of means for delivering a stream of pressurized fluid to form or enlarge the cavity; subclass 226 for a method of embedding a marine structure in the bed of a body of water using fluid jets; and subclass 248 for a pile with fluid jet means to assist in sinking or positioning the pile.
