| 摘要 |
The present disclosure relates to a pump mechanism driven by differential pressure conditions and method for delivery of materials In one embodiment, the pump mechanism may be used to deliver treatment chemicals to a plunger apparatus or directly to a wellbore by exploiting pressure conditions found at a well. The pump mechanism is able to balance high pressure conditions available within a petroleum formation against low pressure conditions present In a common flow line serving the well. In so balancing these pressures, the pump mechanism is able to automatically tune itself to the needs of the well, ensuring continued operation over a wider range of operating conditions. The pump mechanism can be used in connection with a chemical applicator which can be used to apply chemical into, onto, or below, a plunger or plunger/dispenser apparatus used in plunger lift operations, or to apply chemical directly down the well.
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