Remote field eddy current tools
AssigneeHalliburton Energy Services, Inc.
InventorsAhmed Elsayed Fouda, Burkay Donderici
Life of this patent
Estimating the term…
Abstract
Some implementations include a method for estimating a first pipe thickness of a first pipe within multiple nested conductive pipes, the method comprising: forming a measured log including a set of log measurements at different depths using an electromagnetic pulsed tool disposed in multiple nested conductive pipes in a wellbore; generating a plurality of remote-field eddy current (RFEC) look-up curves based on measurements of normalized signal level responses for the multiple nested conductive pipes at one or more points in a time decay response; and selecting an RFEC look-up curve from the plurality of RFEC look-up curves at a point in the time decay response that indicates the first pipe thickness of the first pipe.
Claims20
A method for estimating a first pipe thickness of a first pipe within multiple nested conductive pipes, the method comprising:
- forming a measured log including a set of log measurements at different depths using an electromagnetic pulsed tool disposed in multiple nested conductive pipes in a wellbore;
- generating a plurality of remote-field eddy current (RFEC) look-up curves based on measurements of normalized signal level responses for the multiple nested conductive pipes at one or more points in a time decay response;
- and
- selecting an RFEC look-up curve from the plurality of RFEC look-up curves at a point in the time decay response that indicates the first pipe thickness of the first pipe.
One or more non-transitory machine-readable media including instructions executable by a processor to cause the processor to estimate a first pipe thickness of a first pipe within multiple nested conductive pipes, the instructions comprising:
- instructions to form a measured log including a set of log measurements at different depths using an electromagnetic pulsed tool disposed in multiple nested conductive pipes in a wellbore;
- instructions to generate a plurality of remote-field eddy current (RFEC) look-up curves based on measurements of normalized signal level responses for the multiple nested conductive pipes at one or more points in a time decay response;
- and
- instructions to select an RFEC look-up curve from the plurality of RFEC look-up curves at a point in the time decay response that indicates the first pipe thickness of the first pipe.
A system configured to estimate a first pipe thickness of a first pipe within multiple nested conductive pipes, the system comprising:
- an electromagnetic pulsed tool having a transmitter coil and a receiver coil arranged such the receiver coil receives a secondary field in response to a primary field generated from the transmitter coil;
- a processor;
- and
- a computer-readable storage medium having instructions executable by the processor, the instructions including:
- instructions to form a measured log including a set of log measurements at different depths using the electromagnetic pulsed tool disposed in multiple nested conductive pipes in a wellbore;
- instructions to generate a plurality of remote-field eddy current (RFEC) look-up curves based on measurements of normalized signal level responses for the multiple nested conductive pipes at one or more points in a time decay response;
- and
- instructions to select an RFEC look-up curve from the plurality of RFEC look-up curves at a point in the time decay response that indicates the first pipe thickness of the first pipe.
Dependencies are inferred from the claim text.