| 摘要 |
A secondary packing arrangement is provided for use with a well having a reciprocating pump and polished rod, and in combination with a stuffing box, the stuffing box being modified. Packing seals, a barrier fluid and a pressure transmitter cooperate with modified stuffing box components to regulate the pressure on either side of a packing seal. The barrier fluid is contained above the packing seal, with well fluids and accompanying pressures being contained below the packing seal, such that if leakage occurs, relatively clean barrier fluids are leaked instead of well fluids. The pressure across the packing seal is substantially balanced across the packing seal, or the well fluid side pressure is less than the barrier fluid side, thus reducing the occurrence of leakage and extending the life of the packing seal. Sources for the well fluids cooperating with the pressure transmitter include the well's flow line and casing.
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