Patent ID: 9624765
Date: 2017-04-18
CPC Classifications: E21B,G01B

Claim:
1. A system for determining rod position in a rod pumped well comprising: a laser unit mounted on an underside of a walking beam of the well, wherein the laser unit transmits a laser beam in an arcuate path as the laser unit pivots up and down with the walking beam; and an elongated reflector plate mounted on a sampson post pivotally supporting the walking beam, wherein the laser beam transmitted onto the elongated reflector plate and moves back and forth along a length of the elongated reflector plate as the laser unit pivots up and down with the walking beam; and wherein the laser unit detects reflections of the laser beam from the elongated reflector plate, to determine distances between the laser unit and the elongated reflector plate while the laser unit pivots up and down with the walking beam, wherein the distances between the laser unit and reflector plate are output for use in determining a position of a rod in the rod pumped well.