| 摘要 |
A packer nose assembly for pumping downhole equipment of the free type into and out of a tubing string located within a borehole. The assembly includes a mandrel having a lower end portion attachable to the downhole equipment and an upper end portion terminating in the form of a fishing neck. One or more packers are slidably received in a telescoping manner upon the mandrel and fixed in spaced-apart relationship respective to one another by spaced sleeves which are likewise slidably received upon the mandrel. Each packer is cylindrical in form and includes a resilient cup member which is affixed to the mandrel by a mount member. A marginal end of the cup is in the form of a lip which circumferentially extends about the mandrel and is biased into sealed engagement with the tubing wall. A marginal end of the mount member is in the form of a skirt which protects the cup member from damage.
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