Patent ID: 9217321
Filing Date: 2015-12-22
Classification: E21B

Abstract:
1. A system for determining a depth in a wellbore of a reference point associated with a coiled tubing on a coiled tubing spool, the system comprising: an angular position sensor adapted to be coupled to the coiled tubing spool, wherein the angular position sensor is configured to determine an angular position of the coiled tubing spool; a winding sensor adapted to be coupled to the coiled tubing spool, wherein the winding sensor is configured to determine a radius and/or a diameter of an outer wind of the coiled tubing on the coiled tubing spool; a processor adapted to be coupled to the angular position sensor and the winding sensor; a memory coupled to the processor; and an application stored in the memory that, when executed by the processor, determines the depth in the wellbore of the reference point of the coiled tubing based on respective inputs from the angular position sensor and the winding sensor.