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公开(公告)号：US09534491B2
公开(公告)日：2017-01-03
申请号：US14039625
申请日：2013-09-27
Applicant: Rosemount Inc.
Inventor： John Philip Miller , David Lyle Wehrs
CPC classification number: E21B47/09 , E21B43/121 , E21B47/0007 , E21B47/06
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.
Abstract translation: 用于检测柱塞到达井的底部的系统包括被配置为测量井的压力并提供测量的压力输出的压力传感器。 微分计算电路计算测得的压力输出的导数。 检测电路根据计算出的导数，检测柱塞是否到达井底。
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公开(公告)号：US20150090445A1
公开(公告)日：2015-04-02
申请号：US14039625
申请日：2013-09-27
Applicant: Rosemount Inc.
Inventor： John Philip Miller , David Lyle Wehrs
IPC: E21B47/09
CPC classification number: E21B47/09 , E21B43/121 , E21B47/0007 , E21B47/06
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.
Abstract translation: 用于检测柱塞到达井的底部的系统包括被配置为测量井的压力并提供测量的压力输出的压力传感器。 微分计算电路计算测得的压力输出的导数。 检测电路根据计算出的导数，检测柱塞是否到达井底。
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