Halliburton Products & Services Limited
"Principal activity in Iran occurs through the operations of Halliburton Products & Services, Limited, a Cayman Islands company, headquartered in Dubai, U.A.E. (hereinafter HPSL). HPSL performs between $30 and $40 million annually in oilfield service work in Iran, consisting of cementing, completions work, downhole tools and well testing, stimulation services, PDC drilling bits, coring bits, fluids logging and the provision of drilling fluids. "
"HPSL's activities are parallel to, and competitive with the activities of the foreign affiliates of Schlumberger, Baker-Hughes, Smith International; Weatherford; ABB Vetco Gray, FMC, Cooper-Cameron; as well as those of other U.S. and foreign competitors"
saying one of these companies is better than the other would be outside my realm of knowledge. Suffice it to say Halliburton profits from Iran even though they aren't allowed to directly control/operate there.
"The operation is profitable, and as shown in the chart, revenues are increasing generally across the board"
http://www.halliburton.com/news/archive/2004/report.jsp