Patent ID: 7025089
Filing Date: 2006-04-11
Classification: F16K,Y10T

Abstract:
1. A system for accurately measuring choke position comprising: a. a choke position indicator; b. a choke adapted to control the flow of high pressure fluids during completion of a well comprising a stationary housing for containing a hydraulic cylinder or manual operator, a choke actuator shaft with a gate, disposed in the housing connected to the hydraulic cylinder or manual operator wherein the hydraulic cylinder or manual operator moves the choke actuator shaft with gate towards or away from a gate seat, and wherein the distance between the gate to the gate seat determines the amount of high pressure fluids that pass through the choke; c. a magnet mounted on the choke actuator shaft; d. a magneto/hall device for sensing the location of the magnet as the choke actuator shaft moves, wherein said magneto/hall device is mounted to the stationary housing and provides an analog signal; e. a power wire connecting the magneto/hall device to a power source; f. a ground wire to ground the magneto/hall device; g. an analog-to-digital converter for receiving the analog signal from the magneto/hall device and converting the analog signal to a digital signal; and h. a processor in communication with the digital to analog converter for converting the digital signal into choke shaft positions and transmitting the choke shaft positions to the choke position indicator.