Atlas Copco Rental, Houston, the US and Canadian arm of the specialty division of the Atlas Copco Group, Stockholm, named Dan Dorran vice-president of its new seismic rental business. The division also rents drilling tools and rigs. Newpark Drilling Fluids LLC, Houston, entered into a joint development agreement with Z Trim Holdings Inc., a bio-technology company based in Mundelein, Ill., to develop environment-friendly drilling fluids that incorporate Z Trim's proprietary industrial materials to replace guar and xanthan gums. Steve Cohen, chief executive of Z Trim, said, "Months of testing have proved that our domestically-sourced ingredients possess unique properties differentiatin...

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