To fracture or not to fracture—that has been the question dogging valve-in-valve (ViV) TAVI. The answer, new data suggest, is that fracturing the preexisting bioprosthetic aortic valve may be the best ...
A proposed calculation of in situ closure stress allows engineers to select more appropriate proppant. For decades, the calculation for in situ closure stress on proppant has involved subtracting ...
Eight empirical correlations, simple to use with a handheld calculator, were developed to help design frac pack. The correlations estimate fracture closure pressure, Young's modulus, leak-off ...
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