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US 7,681,642 B2Granted
Method for logging after drilling
AssigneeWeatherford/Lamb, Inc.
InventorsJohn W. Bell, Larry E. Whitney, Keith Fitzgerald, Thomas M. Redlinger
Life of this patent
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Abstract
A method for logging a downhole formation in a wellbore. The method comprises drilling a wellbore with a drill bit coupled to a disconnect device. The disconnect device is then actuated to detach the drill bit from a portion of a conveyance. A logging operation is then performed between two portions of the disconnect device. The disconnect device may then be reattached.
Claims19
A method for performing a logging operation in a wellbore, comprising:
- providing a disconnect device having a bottom sub, and a release sub;
- coupling the disconnect device to a drilling assembly and a conveyance;
- forming a wellbore with the drilling assembly;
- disconnecting the release sub from the bottom sub using a hydraulic actuator;
- raising the release sub relative to the bottom sub;
- thereafter running a logging tool through the release sub;
- logging a portion of the wellbore between release sub and the bottom sub;
- and
- reattaching the release sub to the bottom sub.
6 more elements
A method for performing a logging operation in a wellbore, comprising:
- drilling the wellbore with a drilling assembly coupled to a disconnect device wherein the disconnect device is coupled to a conveyance;
- actuating a hydraulic actuator to operate the disconnect device;
- disconnecting the disconnect device and thereby uncoupling the drilling assembly from at least a portion of the conveyance;
- thereafter running a logging tool through the conveyance to perform a logging operation between two portions of the disconnect device;
- and
- reattaching the disconnect device.
3 more elements
Dependencies are inferred from the claim text.