One embodiment provides an adjustable guide 10a to steer the end 90 of a pipe string 88 into position to be engaged and supported by a pipe gripping apparatus such as, for example, an externally gripping elevator assembly 10. A list of uses of the changed references is next computed using records made in structures of the references. Furthermore, CO is used either as the fuel in SOFC for power generation or starting materials in the chemical reactors to produce CO-derivatives of energy source materials and useful chemical compounds.