B - Operations – Transporting – 26 – F
Patent
B - Operations, Transporting
26
F
B26F 1/26 (2006.01) B24C 1/00 (2006.01) B24C 11/00 (2006.01) E21B 7/18 (2006.01) E21B 29/06 (2006.01) E21B 43/114 (2006.01)
Patent
CA 2135565
Abstract of the Disclosure Method of forming openings in structural substrates, especi- ally oil and gas well casings, by providing a supply of a pre- selected liquid and providing a supply of preselected abrasive particles which are soluble in the liquid. The liquid and abrasive particles are combined to form an abrasive particle laden saturated solution having a predetermined concentration ratio exceeding the saturation point of the base liquid. The abrasive particle laden saturated solution is then pressurized to a predetermined delivery pressure and is routed to at least one jetting nozzle capable of expelling the abrasive particle laden saturated solution. The substrate, in which an opening is to be formed, is subjected to a directed expulsion of the abrasive particle laden saturated solution at a distance and for a period of time necessary to form an opening there- through. Such abrasive particle laden saturated solution used and needed to form the opening is then considered to be re- sidual. Preferably the method further includes diluting the residual abrasive particle laden saturated solution with the original liquid, or alternatively, a second liquid such as an said, to transform the residual solution into having essenti- ally a zero concentration of soluble abrasive particles there- in. Alternatively, an unsaturated solution of soluble abrasive particles may be substituted for the saturated solution, and introduced before or after the liquid passes through the jet- ting nozzle, provided the hydraulic jetting is performed prior to the particles dissolving within the preselected liquid.
Bradley Gary W.
Surjaatmadja Jim B.
Tisch Brett L.
Haliburton Company
Swabey Ogilvy Renault
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