Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1977-11-18
1979-01-16
Novosad, Stephen J.
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
166 55, 299 17, E21B 43114
Patent
active
041344537
ABSTRACT:
Apparatus and a method for cutting round perforations and elongated slots in well flow conductors used in solution mining. The apparatus comprises a jet nozzle head for discharging a fluid to cut the perforations and slots, a string of continuous tubing for handling the jet nozzle head in a well bore, a tubing injector or tubing guide, a tubing storage reel having a flow conducting central hub connected with the tubing on the reel for forcing the abrasive fluid into the tubing at the reel, fluid pump and storage means connected with the reel hub, means for mounting the tubing injector above a well, and a wellhead having annular stripper rubber for sealing around the tubing and a side outlet for fluid returns. The method includes the steps of supporting the nozzle head on a first end of the tubing, lowering the nozzle head in a well bore with the tubing injector until the nozzle head is at the desired depth, pumping a fluid through the hub of the storage reel into the tubing and outwardly through the nozzle head until the perforations are cut. For slotting the tubing and nozzle head are reciprocated the distance equal to the length of slots desired. The returns from the nozzle head flow upwardly in the annulus to the wellhead and outwardly through the side outlet.
REFERENCES:
patent: 2315496 (1943-04-01), Boynton
patent: 3130786 (1964-04-01), Brown et al.
patent: 3175613 (1965-03-01), Hough et al.
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patent: 3313346 (1967-04-01), Cross
patent: 3719230 (1973-03-01), Kemp et al.
patent: 3866679 (1975-02-01), Laky
Savanick, "Water Jet Perforator for Uranium Leaching Wells", Uranium Mining Technology Conference, University of Nevada, Apr. 1977.
Love Robert G.
McCalla, Jr. Joseph B.
Shelton Robert Q.
Duzan James R.
Halliburton Company
Novosad Stephen J.
Suchfield George A.
Tregoning John H.
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