| 摘要 |
An oil well tool and method for its use for removing accumulated deposits along an oil well tubing in a downhole pump operated oil well is disclosed. The tool when in use is untethered and adapted to be lowered through an oil well tubing under its own weight and the forces of gravity. The tool includes: a heating and scraping portion that removes the deposits as the tool is lowered through the tubing, a set of seals for preventing pumped fluids from passing through or around the tool, and a mechanism for setting the seals at a desired location along the tubing. With the seals set and the pump operating, the tool is raised up through the well tubing with the pumped fluids to a wellhead storage position.
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