FIELD: oil production; applicable in completing of equipment, in particular, injection one for crude oil with high pour point and/or high wax-bearing crude oil. SUBSTANCE: equipment includes pump whose piston rod is connected by screw joint string of hollow rods accommodating electrical heating means electrically connected by means of contact device with lower hollow rod. In this case, pump piston rod is connected with hollow rod whose other end is connected to string of hollow rods by means of terminal. Electrical heating device is made in form of continuous long length of supply cable whose lower end is electrically connected with terminal, and upper end runs through hanger for suspension of cable. EFFECT: higher efficiency. 6 cl, 5 dwg
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Authors
Dates
1997-08-27—Published
1994-02-21—Filed