Pump barrels, plungers, valve ball & seats, seating nipples are the basic pump parts of sucker rod pumps.
Seating nipples function to the sucker rod pump:
Sucker rod pump is equipped with a seating nipple(there are two seating nipples in API-RHBM-AC) , seating nipple connection on the tubing string, down to the bottom of the well with the tubing string.
Specification table of seating nipple:
| Specification | Thread Type | Steel Grade |
| 1.9 | EUE box *EUE box, EUE box *EUE pin, EUE box *NUE box, EUE box *NUE pin, EUE pin *NUE box, EUE pin *NUE pin, NUE box *NUE box, NUE pin*NUE pin | J55,K55,L80,N80 |
| 2 3/8 | ||
| 2 7/8 | ||
| 3 1/2 | ||
| 4 | ||
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