PHOTOGRAPHIC OBJECTIVES OBJECTIVES

Brand	Owner	Address	Description
HELIGON	OPTISCHE WERKE G. RODENSTOCK	Isartalstr. 43 80469 Munchen Germany	photographic objectives and objectives for still and moving picture projectors;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Methods are described for providing localized heating in an oil well at precise depths to accomplish or expedite specific objectives. The methods involve the use of a heating tool which can be lowered into an oil well to apply heat at a precise depth to achieve a desired result. The specific objectives may include localized heating of a fresh cement slurry to accelerate curing, or localized heating of recently emplaced chemicals which are formulated to be thermally activated. One purpose of such chemicals is to viscosify or increase in gel strength after being pumped into an oil well production zone, in order to restrict the production of unwanted formation fluids such as water.