Boart Longyear wireline core retrieval system, an innovation that revolutionized the diamond drilling industry by increasing productivity on the worksite and making tripping core from the bottom of the hole safer for the drilling assistant. Later named the Q Wireline System, the new core retrieval method introduced a level of productivity never before seen in the exploration drilling industry. In 1964 Longyear sold 25 percent of its family-owned stock to FACTS, a Luxembourg-based holding company owned jointly by Boart International and Christensen Diamond Products Company. Three years later FACTS exercised its option to purchase another 25 percent of Longyear's family stock. The
Teisserenc de Bort (crater) Teisserenc de Bort (crater) Teisserenc de Bort is an impact crater on Mars, located in the Arabia quadrangle at 0.4° N and 315.0° W. It measures 119 kilometers in diameter and was named after French meteorologist Léon Teisserenc de Bort (1855–1913). The name was adopted by IAU's Working Group for Planetary System Nomenclature in 1973. The crater are one of a few that covers the four quadrangles, parts of the crater are in the Iapygia, Syrtis Major and Sinus Sabaeus quadrangles, the crater's center is in the Iapygia quadrangle. Nearby prominent craters include Schroeter (or Schröter) to the east, the