Samuel, G. Robello <br/><br/>
Downhole drilling tools :  theory and practice for engineers and students / 
G. Robello Samuel 
 - Houston, Tex. :  Gulf Pub.,  c2007 
 - xvi, 648 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>1933762136 (alk. paper) 9781933762135 (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boring--Equipment and supplies<br/>Oil well drilling--Equipment and supplies<br/>Oil well drilling<br/>Gas well drilling