FIELD: engines and pumps.
SUBSTANCE: invention relates to mechanical attachment of an insert sucker rod pump in a tubing string. An attachment assembly includes a coupling 6 with an inner cylindrical surface and a cone section and a mounting cylinder 7 of the pump with a mating cone section. On the outer surface of the mounting cylinder of the pump there is an annular projection in which a friction ring 8 is installed, which interacts with the inner cylindrical surface of the coupling 6 and is tightly pressed with sealing ring 9. The outer diameter of the friction ring 8 exceeds the inner diameter of the coupling 6 by the value of not more than 1 mm.
EFFECT: improving the reliable attachment of a pump in a tubing string and processibility of the assembly rigging-up and installation.
2 dwg
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