| US 7,525,872 B2 | ||
| Method and apparatus for cement bond evaluation using transversely polarized shear waves | ||
| Xiao-Ming Tang, Sugar Land, Tex. (US); Alexei Bolshakov, Pearland, Tex. (US); Tsili Wang, Katy, Tex. (US); and Douglas Patterson, Spring, Tex. (US) | ||
| Assigned to Baker Hughes Incorporated, Houston, Tex. (US) | ||
| Filed on Feb. 26, 2004, as Appl. No. 10/787,628. | ||
| Prior Publication US 2005/0190648 A1, Sep. 01, 2005 | ||
| Int. Cl. G01V 1/44 (2006.01); G01V 1/50 (2006.01) | ||
| U.S. Cl. 367—35 [367/30; 367/31; 181/105] | 19 Claims |
| 1. A method of evaluating a casing bond disposed between a casing and a wellbore comprising:
inducing a transversely polarized shear wave into the casing that propagates along an X axis that is substantially parallel
to the casing surface and polarized to cause particle movement in the casing along a Z axis that is orthogonal to the X axis
and the Z axis is substantially parallel to the casing surface;
monitoring the attenuation of said transversely polarized shear wave; and
estimating a characteristic of the casing bond based on said monitoring.
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