Method for synchronizing downhole tractor and winch deployment
AssigneeHalliburton Energy Services, Inc.
InventorsWesley N. Ludwig, Sudhir K. Gupta, Yuan Qi
Life of this patent
Estimating the term…
Abstract
A method for synchronizing downhole tractor and surface winch deployment includes inserting into a wellbore a tool string connected to a wireline, where the tool string includes a variable speed tractor. The method also includes deploying the tractor, and deploying the wireline from a winch. The method further includes dynamically monitoring, by a device disposed downhole, a wireline tension as an indicator of synchronization of the tractor and winch.
Claims20
A method for synchronizing downhole tractor and surface winch deployment comprising:
- inserting into a wellbore a tool string connected to a wireline, the tool string comprising a variable speed tractor;
- deploying the tractor;
- deploying the wireline from a winch;
- dynamically monitoring, by a device disposed downhole, a wireline tension as an indicator of synchronization of the tractor and winch;
- determining an operator desired speed of the tractor;
- determining a reference downhole tension;
- determining an actual downhole tension;
- determining a modified speed of the tractor based on the operator desired speed of the tractor, the reference downhole tension, and the actual downhole tension;
- and
- adjusting, by the device, the tractor speed in response to a disparity in tension to match the winch speed, wherein the tractor speed is adjusted based on the modified speed.
A system for synchronizing downhole tractor speed and surface winch deployment comprising:
- a winch for deploying a tool string on a wireline;
- a variable speed tractor connected to the tool string for deploying the tool string into a wellbore;
- a wireline tension sensor;
- and
- a downhole device in communication with the tractor and the wireline tension sensor and having one or more processors configured to:
- dynamically monitor wireline tension as an indication of synchronization of the tractor and winch;
- determine an operator desired speed of the tractor;
- determine a reference downhole tension;
- determine an actual downhole tension;
- and
- determine a modified speed of the tractor based on the operator desired speed of the tractor, the reference downhole tension, and the actual downhole tension;
- and
- dynamically adjust the speed of the tractor to match the winch speed wherein the tractor speed is adjusted based on the modified speed.
A method for synchronizing downhole tractor and surface winch deployment comprising:
- inserting into a wellbore a tool string connected to a wireline, the tool string comprising a variable speed tractor;
- deploying the tractor;
- deploying the wireline from a winch;
- dynamically monitoring, by a device disposed downhole, a wireline tension as an indicator of synchronization of the tractor and winch;
- implementing a counter to indicate an amount of slack in the wireline, wherein the counter is zeroed when the wireline tension confirms that adding or removing slack indicates there is no slack in the wireline;
- and
- adjusting the tractor speed in response to a disparity in tension to match the winch speed.
Dependencies are inferred from the claim text.