Methods and means for measuring multiple casing wall thicknesses using x-ray radiation in a wellbore environment
An x-ray based cased wellbore simultaneous tubing and casing measurement tool includes at least an x-ray source; a radiation shield to define the output from of the produced x-rays; a two-dimensional per-pixel collimated imaging detector array; a secondary two-dimensional per-pixel collimated imaging detector array; a plurality of parallel hole collimators formatted such in one direction so as to form a pinhole in another direction; sonde-dependent electronics; and a plurality of tool logic electronics and PSUs. A method of using an x-ray based cased wellbore simultaneous tubing and casing measurement tool includes at least producing x-rays in a shaped output; measuring the intensity of backscatter x-rays returning from materials surrounding the wellbore; determining the inner and outer diameters of tubing and casing from the backscatter x-rays; and converting image data from detectors into consolidated images of the tubing and casing.
1. An x-ray-based cased wellbore simultaneous tubing and casing measurement tool comprising:
an x-ray source to produce x-rays in a shaped output;
a plurality of collimated per-pixel imaging detector arrays that includes:
a first set of two-dimensional per-pixel collimated imaging detector arrays; and
a second set of two-dimensional per-pixel collimated imaging detector arrays; and
three-dimensional collimators collocated with the plurality of collimated per-pixel imaging detector arrays, wherein the three-dimensional collimators are formed as pinholes in a transverse direction and as parallel hole collimators in an axial direction that is orthogonal to the transverse direction.
2. The tool of claim 1 , wherein the plurality of collimated imaging detector arrays comprise a single strip array that is one pixel wide and multiple pixels long.
3. The tool of claim 1 , wherein the plurality of collimated imaging detector arrays comprise a plurality of collimated scintillator-based imaging detector arrays.
4. The tool of claim 1 , wherein images contain spectral information to inform characteristics of any wellbore materials or debris.
5. The tool of claim 1 , wherein the tool is configured so as to permit through-wiring.
6. The tool in claim 1 , wherein the tool is combinable with other measurement tools comprising one or more of acoustic or ultrasonic measurement tools.
7. The tool in claim 1 , wherein the tool is used to determine an inner diameter of a tubing or casing.
8. The tool in claim 1 , wherein the tool is used to determine an outer diameter of a tubing or casing.
9. The tool in claim 1 , wherein the tool is used to determine a distribution and inner diameter of a scale upon an inner diameter of a tubing or casing.
10. The tool in claim 1 , wherein the tool is used to determine a position, distribution and area of perforations within casings surrounding the cased wellbore.
11. The tool in claim 1 , wherein machine learning is employed to automatically reformat or re-tesselate resulting images as a function of depth and varying logging speeds or logging steps.
12. A method of using an x-ray-based cased wellbore simultaneous tubing and casing measurement tool, the method comprising:
producing x-rays in a shaped output using an x-ray source of the tool;
measuring an intensity of backscatter x-rays returning from materials surrounding a wellbore using a plurality of collimated per-pixel imaging detector arrays of the tool, wherein the plurality of collimated per-pixel imaging detector arrays include first and second sets of two-dimensional per-pixel collimated imaging detector arrays, wherein the plurality of collimated per-pixel imaging detector rays are collocated with three-dimensional collimators of the tool, and wherein the three-dimensional collimators are formed as pinholes in a transverse direction and as parallel hole collimators in an axial direction that is orthogonal to the transverse direction;
determining inner and outer diameters of tubing and casing from the backscatter x-rays; and
converting image data from the plurality of collimated per-pixel imaging detector arrays into consolidated images of the tubing and casing.
13. The method of claim 12 , wherein the plurality of collimated imaging detector arrays comprise a single strip array that is one pixel wide and multiple pixels long.
14. The method of claim 12 , wherein the consolidated images contain spectral information to inform characteristics of any wellbore materials or debris.
15. The method of claim 12 , wherein the tool is combinable with other measurement tools comprising one or more of acoustic or ultrasonic measurement tools.
16. The method of claim 12 , further comprising:
using the consolidated images to determine a distribution and inner diameter of a scale upon the inner diameter of a tubing or casing.
17. The method of claim 12 , further comprising:
using the consolidated images to determine a position, distribution and area of perforations within the casings surrounding the cased wellbore.
18. The method of claim 12 , wherein machine learning is employed to automatically reformat or re-tesselate resulting images, as a function of depth and varying logging speeds or logging steps.