API 11B Polished rod stuffing box
Standard: API 11B
Size: 1-1/8", 1-1/4", 1-1/2"
Connected tubing thread: 2-3/8 TBG, 2-3/8 UP TBG, 2-7/8 TBG, 2-7/8 UP TBG, 3-1/2 TBG, 3-1/2 UP TBG
Medium temper:-30～80 degree celsius
Pressure: 0.147-10.5 Mpa
wellhead-sealing equipment for low pressure well. While polished rod moves up and down through the stuffing box, it provides a good sealing property and pumps oil from well hole to the outlet tube so as to avoid environment pollution. The stuffing box is furnished in two types, single and double packing which have self-compensation and auto-centralization function. This stuffing box can be used in the normal pumping wells, pumping/blowing wells and the wells which shows higher return pressure on the well head when using cold oil transfer technology.
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