基本信息:
- 专利标题： Casing resonant radial flexural modes in cement bond evaluation
- 专利标题（中）：在Zementationsbeurteilung面板的谐振径向弯曲模式
- 申请号：EP06256295.4 申请日：2006-12-11
- 公开(公告)号：EP1795919A3 公开(公告)日：2011-07-06
- 发明人： Bolshakov, Alexei , Dubinsky, Vladimir , Tang, Xiao Ming , Patterson, Douglas , Donskoy, Dimitri , Barolak, Joseph G.
- 申请人： Baker Hughes Incorporated
- 申请人地址： 2929 Allen Parkway Suite 2100 Houston, TX 77019 US
- 专利权人： Baker Hughes Incorporated
- 当前专利权人： BAKER HUGHES, A GE COMPANY, LLC
- 当前专利权人地址： BAKER HUGHES, A GE COMPANY, LLC
- 代理机构： Jeffrey, Philip Michael
- 优先权： US749136P 20051209
- 主分类号： G01V1/50
- IPC分类号： G01V1/50 ; E21B47/00
摘要：
A method useful for evaluating the presence and/or the quality of the cement bond (44) of a downhole tubular (36). The method involves measuring radial resonance modes of the tubular (36), and comparing those measured values to the unbound tubular resonant values of a calibration ring. For a well bonded tubular (36), the measured radial resonance should be greater than that of the unbound tubular calibration ring. In regions where a fluid, such as water surrounds the outside of the tubular (36), or the cement (44) is otherwise not bonded to the outer surface of the tubular (36), the measured response should be less than the calibrated response. The calibration ring should have the same diameter, wall thickness, and be made of the same material as the tubular (36).