Downhole tool string weight measurement and sensor validation
AssigneeSchlumberger Technology Corporation
InventorAlejandro Camacho Cardenas
Life of this patent
Estimating the term…
Abstract
Methods and systems for performing weigh measurement of a downhole tool string and validating accuracy of corresponding sensors. A method may include commencing operation of a processing device to control operations at an oil and gas wellsite. The processing device may then output a movement control command to a lifting device to cause a downhole tool string to move in accordance to the movement control command, receive an acceleration measurement of the downhole tool string, and determine a weight measurement of the downhole tool string based on the movement control command and the acceleration measurement.
Claims18
A system comprising:
- an acceleration sensor disposed in association with a first piece of equipment at an oil and gas wellsite, wherein the acceleration sensor is operable to facilitate determination of an acceleration measurement of a downhole tool string;
- a weight sensor disposed in association with a second piece of equipment, the weight sensor operable to facilitate determination of a detected weight measurement of the downhole tool string;
- and
- a processing device comprising a processor and a memory storing computer program code, wherein the processing device is operable to:
- output a movement control command to a lifting device to cause the downhole tool string to move in accordance to the movement control command;
- receive the acceleration measurement;
- and
- determine a deduced weight measurement of the downhole tool string based on the movement control command and the acceleration measurement;
- receive the detected weight measurement;
- compare the deduced weight measurement to the detected weight measurement;
- and
- determine an accuracy of at least one of the acceleration sensor and the weight sensor based on the comparison.
A method comprising:
- commencing operation of a processing device to control operations at an oil and gas wellsite, wherein the processing device:
- outputs a movement control command to a lifting device to cause a downhole tool string to move in accordance to the movement control command;
- receives an acceleration measurement of the downhole tool string facilitated ban an acceleration sensor;
- determines a deduced weight measurement of the downhole tool string based on the movement control command and the acceleration measurement;
- receives a detected weight measurement of the downhole tool string facilitated by a weight sensor;
- compares the deduced weight measurement to the detected weight measurement;
- and
- determines an accuracy of at least one of the acceleration sensor and the weight sensor based on the comparison.
A method comprising:
- commencing operation of a processing device to control operations at an oil and gas wellsite, wherein the processing device:
- outputs a current movement control command to a lifting device to cause a downhole tool string to move;
- receives a current acceleration measurement of the downhole tool string;
- compares the current movement control command and the current acceleration measurement to recorded past movement control commands and corresponding recorded past acceleration measurements;
- and
- determines a current weight measurement of the downhole tool string to be equal to a recorded past weight measurement associated with a closest recorded past movement control command of the recorded past movement control commands and corresponding recorded past acceleration measurement of the corresponding recorded past acceleration measurements.
Dependencies are inferred from the claim text.