Patent ID: 8631861
Filing Date: 2014-01-21
Classification: E21B,F16J

Abstract:
1. For a well producing well fluids, and in combination with a reciprocating plunger type pump having a polished rod, a packing unit, through which the polished rod moves, the packing unit comprising: a housing having a chamber and a downward facing shoulder; a packing assembly, positioned within the housing chamber, through which the polished rod moves, the packing assembly having: the packing unit further comprising a pressure transmitter having a cylinder and a piston within the cylinder, the cylinder having a well fluid communication end, the well fluid communication end fluidically communicating with the housing lower chamber such that well fluid pressures the piston, the cylinder having a barrier fluid communication end, the barrier fluid communication end fluidically communicating with the housing upper chamber, such that the barrier fluid pressurably engages the piston; the piston being sized such that the pressure from the well fluid on the piston is transmitted to the barrier fluid, the barrier fluid being pressured in the housing upper chamber to oppose the well fluid pressure on the packing assembly center portion and to pressurably displace the seal positioner.