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US 12,655,745 B2Granted
Prediction based pump-off detection
AssigneeHalliburton Energy Services, Inc.
InventorsSiyang Song, Atchyuta Ramayya Venna, Jian Wu, Robert P. Darbe, Sudhir Kumar Gupta
Life of this patent
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Abstract
Pump-off detection, and actions to avert a pump-off event from occurring, are described that may be implemented in a wireline control system while performing a pump-down operation to position a downhole tool within a wellbore. As part of the pump-down operation, the downhole tool is attached to a wireline coupling the tool to a wireline control device located at the surface above the wellbore.
Claims21
A method comprising:
- receiving signals corresponding to sensed measurements of a tension in a wireline coupled to a tool while the tool is being positioned within a wellbore as part of a pump-down procedure;
- determining a system reaction time for reacting to a pump-off event during the pump-down procedure;
- determining a prediction horizon, the prediction horizon based, at least in part, on the system reaction time;
- determining, based on the tension measured for the wireline, a prediction for a downhole tension for the wireline at the prediction horizon;
- comparing the prediction for the downhole tension at the prediction horizon to a predetermined tension threshold value;
- predicting a pump-off event based on a value for the prediction for the downhole tension at the prediction horizon exceeding the predetermined tension threshold value;
- activating a pump-off controller;
- and
- mediating the pump-down procedure upon predicting the pump-off event, wherein mediating the pump-down procedure includes reconfiguring at least one of an operational parameter related to a wireline apparatus controlling a line speed at which the wireline is being extended into the wellbore, and an operational parameter related to one or more pumps providing fluid pressure at a controlled fluid flow rate to the wellbore to move the tool in a downhole direction within the wellbore.
6 more elements
A system comprising:
- a wireline coupled to a tool to be positioned within a wellbore;
- a computing device including a processor, the computing device configured to:
- receive signals corresponding to sensed measurements of a tension in the wireline while the tool is being positioned within the wellbore as part of a pump-down procedure;
- determine a system reaction time for reacting to a pump-off event during the pump-down procedure;
- determine a prediction horizon, the prediction horizon based, at least in part, on the system reaction time;
- determine, by the processor and based on the tension measured for the wireline, a prediction for a downhole tension for the wireline at the prediction horizon;
- compare, by the processor, the prediction for the downhole tension at the prediction horizon to a predetermined tension threshold value;
- predict, by the processor, a pump-off event based on a value for the prediction for the downhole tension at the prediction horizon exceeding the predetermined tension threshold value;
- activate a pump-off controller;
- and
- mediate the pump-down procedure upon predicting the pump-off event, wherein mediating the pump-down procedure includes reconfiguring at least one of an operational parameter related to a wireline apparatus controlling a line speed at which the wireline is being extended into the wellbore and an operational parameter related to one or more pumps providing fluid pressure at a controlled fluid flow rate to the wellbore to move the tool in a downhole direction within the wellbore.
8 more elements
An apparatus comprising:
- a processor;
- and
- a non-transitory machine-readable medium having program code executable by the processor to cause the apparatus to:
- receive signals corresponding to sensed measurements of a tension in a wireline coupled to a tool while the tool is being positioned within a wellbore as part of a pump-down procedure;
- determine a system reaction time for reacting to a pump-off event during the pump-down procedure;
- determine a prediction horizon, the prediction horizon based, at least in part, on the system reaction time;
- determine, based on the tension measured for the wireline, a prediction for a downhole tension for the wireline at the prediction horizon;
- comparing the prediction for the downhole tension at the prediction horizon to a predetermined tension threshold value;
- predict a pump-off event based on a value for the prediction for the downhole tension at the prediction horizon exceeding the predetermined tension threshold value;
- activate a pump-off controller;
- and
- mediate the pump-down procedure upon predicting the pump-off event and activating the pump-off controller, wherein mediating the pump-down procedure includes reconfiguring at least one of an operational parameter related to a wireline apparatus controlling a line speed at which the wireline is being extended into the wellbore and an operational parameter related to one or more pumps providing fluid pressure at a controlled fluid flow rate to the wellbore to move the tool in a downhole direction within the wellbore.
9 more elements
Dependencies are inferred from the claim text.