Core Laboratories (CLB) shares sank 35 percent after the company said it expects second-quarter earnings to come in between 11 cents and 13 cents a share, below First Call's average earnings estimate of 17 cents. The Netherlands-based company attributed the shortfall to delayed capital expenditures by international oil companies. Core Laboratories, which supplies reservoir products and services designed to improve oil and gas recovery from production fields, expects quarterly revenues of $70 million to $72 million. Revenues are forecast at $310 million for the year. The stock fell 9 7/8 to 18 3/4. See full story.