First of Dhoti companies are always full of fraud. Even US government knows about this.

Now back to point, if he has not had any interview calls then you should not blame consulting companies. In addition to company's effort, it should be himself who seriously needs to upload resume online. Also, resume should be updated online, no matter even if it is just a word change, in daily basis so that his resume will always surface when employers look for candidates on resume sites such as monster, dice, careerbuilder. 

I too had H1B transfered to a dhoti company in one occasion. I never got interview calls through my Indian company. I would update my resume online in a daily basis. I did not have to wait a long to get a new job offer. Whenever I would get interviews, I would refer to my dhoti company to finalize the rate.

Put some effort, it should not be hard especially in Oracle DBA.