FIELD: oil industry.
SUBSTANCE: invention is intended for use in oil industry in installations of sucker-rod pumps, namely for flushing of valve units. Device for flushing of valve units of sucker-rod pumps comprises top sub 1, lower housing 2, bottom sub 3, top bushing 5 with channels, and rod 6 with through hole. In the lower part of rod 6 there is a suction valve assembly, cage 7 and ball 8 of which are installed inside the through hole of rod 6, saddle holder 9 with a through hole. Tip 4 is installed in bushing 5. Upper housing 10 is connected to sub 1 and housing 2. Housing 10 forms with rod 6 upper and lower chambers 11 and 12. Housing 10 comprises channels 13. Rod 6 has holes 14. Coupling 15 connects rod 6 and saddle holder 9, between which saddle 16 is located. Coupling 15 rests on spring 17, the second end of which rests on housing 2. Sub 3 comprises lower bushing 18 with holes, in which rod 19 is installed. Saddle holder 9 in its through hole contains middle bushing 20 with holes, through which rod 19 passes.
EFFECT: invention is aimed at maintaining serviceable state of sucker-rod pumps.
1 cl, 2 dwg
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