Inflatable packer with roughened mandrel

An inflatable packer for use in a well bore comprising:

• a tubular mandrel constructed of a load supporting steel pipe member, said tubular mandrel having a length of ten feet or more,
• an elastomeric tubular sleeve disposed on said tubular mandrel and attached at its ends to said tubular mandrel, said tubular sleeve normally being in contact with the outer surface of said tubular mandrel and being adapted to expand outwardly relative to said tubular mandrel into contact with the wall of a well bore upon the application of a cement slurry fluid upon pressure between said tubular sleeve and said tubular mandrel, and
• said steel pipe member having an irregular outer surface configuration along its length providing protrusions along the said outer surface configuration for engagement with the tubular sleeve so that said irregular outer surface configuration provides a substantial coefficient of friction for preventing the tubular sleeve from relative longitudinal displacement relative to the steel pipe member while going in the well bore and so that upon expansion of the tubular sleeve, the cement slurry fluid is in direct contact with the tubular mandrel and the tubular sleeve whereby a cement bond log can be obtained in a well bore through the length of said steel pipe member.