| 摘要 |
A lubricator assembly for a well head of a gas-producing well includes an elongated rigid tubular body having upper and lower ends and a cylindrical interior chamber open at the lower end for receiving a leading end of a gas lift plunger at the well head, a removable end cap attached at the upper end of the tubular body, and an elongated polyurethane body having a cylindrical configuration and characteristics of a coil spring in that the polyurethane body can be resiliently compressed along its longitudinal axis and will spring back to substantially its original form. The polyurethane body is disposed in the tubular body between the removable end cap and the lower end of the tubular body such that upon arrival of the plunger at the tubular body the polyurethane body will be impacted by the force of the plunger and absorb the impact force.
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