Back to results
US 2015/0090445 A1Published application
Detection of Position of a Plunger in a Well
AssigneeRosemount Inc.
InventorsJohn Philip Miller, David Lyle Wehrs
Life of this patent
Estimating the term…
Abstract
A system for detecting when a plunger reaches a bottom of a well includes a pressure sensor configured to measure a pressure of the well and provide a measured pressure output. Derivative calculation circuitry calculates a derivative of the measured pressure output. Detection circuitry detects when the plunger reaches the bottom of the well based upon the calculated derivative.
Claims39
A system for detecting when a plunger reaches a bottom of a well, comprising:
- a pressure sensor configured to measure a pressure of the well and provide a measured pressure output;
- derivative calculation circuitry configured to calculate a derivative of the measured pressure output;
- and
- detection circuitry which detects when the plunger reaches the bottom of the well based upon the derivative output.
1 more element
A method of detecting when a plunger has reached a bottom of a well, comprising:
- measuring a pressure of the well and providing a measured pressure output;
- calculating a derivative of the measured pressure output;
- detecting when the plunger reaches the bottom of the well based upon the calculated derivative.
Dependencies are inferred from the claim text.