Since 1976, National K Works, Inc. has produced state of the art Dewar Flasks, Pressure Housings and Thermo-housings. Our products are designed to protect valuable down-hole electronics from the high temperatures and pressures encountered in geothermal and modern extreme drilling applications. Our team boasts ISO 9001 certification, multiple patents and the invention of innovative, trade-specific machinery and processes. Researched, developed and manufactured in Houston, Texas, we have satisfied customers on six continents.