Pipeline Inspection Using Variable-Diameter Remote-Field Eddy Current Technology
First Claim
1. A pipeline inspection device for a pipe comprising:
- an exciter coil capable of providing an alternating current magnetic field and producing eddy currents;
a plurality of sensors capable of sensing a magnetic field produced by said eddy currents, said plurality of sensors engaged with a sensor shoe;
said sensors capable of being positioned at a first distance D1 with respect to an inner pipe wall surface and capable of providing coupling to said magnetic field produced by said eddy currents;
said sensor shoe capable of retracting to a second distance D2, wherein D1<
D2.
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Accused Products
Abstract
The present disclosure relates to a device and method for pipeline inspection, The inspection device may include an exciter coil capable of providing an alternating current magnetic field and producing eddy currents. A plurality of sensors may then be provided which are capable of sensing a magnetic field produced by the eddy currents and the sensors may be engaged with a sensor shoe. The sensors may then be capable of being positioned at a first distance D1 with respect to an inner pipe wall surface and capable of providing coupling to the magnetic field produced by the eddy currents. The sensor shoe may also be capable of retracting to a second distance D2, wherein D1<D2. The sensor shoe may be connected to a sensor support arm wherein the support arm may be pivotably attached to a fixed hub and to a control arm which control arm may then be pivotably attached to a driven hub.
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Citations
23 Claims
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1. A pipeline inspection device for a pipe comprising:
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an exciter coil capable of providing an alternating current magnetic field and producing eddy currents;
a plurality of sensors capable of sensing a magnetic field produced by said eddy currents, said plurality of sensors engaged with a sensor shoe;
said sensors capable of being positioned at a first distance D1 with respect to an inner pipe wall surface and capable of providing coupling to said magnetic field produced by said eddy currents;
said sensor shoe capable of retracting to a second distance D2, wherein D1<
D2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A pipeline inspection device for a pipe comprising:
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an exciter coil capable of providing an alternating current magnetic field and producing eddy currents;
a plurality of sensors capable of sensing a magnetic field produced by said eddy currents, said plurality of sensors engaged with a sensor shoe;
said sensors capable of being positioned at a first distance D1 with respect to an inner pipe wall surface and capable of providing coupling to said magnetic field produced by said eddy currents;
said sensor shoe capable of retracting to a second distance D2, wherein D1<
D2;
wherein said sensor shoe is connected to a sensor support arm wherein said support arm is pivotably attached to a fixed hub and to a control arm wherein said control arm is pivotably attached to a driven hub. - View Dependent Claims (19, 20)
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21. A method of inspecting a pipe comprising:
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providing an exciter coil capable of providing an alternating current magnetic field and producing eddy currents;
providing one or a plurality of sensors capable of sensing a magnetic field produced by said eddy currents wherein said sensors are engaged with a sensor shoe;
positioning said sensor shoe at a first distance D1 with respect to an inner pipe wall surface to provide coupling to said magnetic field produced by said eddy currents;
sensing said magnetic field produced by said eddy currents; and
retracting said sensor shoe to a second distance D2, wherein D1<
D2. - View Dependent Claims (22, 23)
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Specification