Article written by Cliff Knight of KnightHawk Engineering. You’re offshore on one of the largest rigs in the world. It was put together with all the latest equipment with all the “bells and whistles.” The rig was built, erected and went into production in record time. As with any new unit, it takes a while [...]
Article written by David Gardellin of Onyx Valve Co A progressing, or progressive cavity pump consists of a single helix metal rotor that turns inside a double helix rubber stator. This forms a series of pockets that traverse the length of the pump, gently pushing fluid from the suction to the discharge in a smooth, [...]
Article written by David Gardellin of Onyx Valve Co Onyx Isolator Rings have traditionally been supplied with mechanical gauges and mechanical switches to monitor process pressure and pump performance. These do a fine job, but many users are changing over to solid state switches. This paper will discuss some of the advantages of each. Principle [...]
Article written by David Gardellin of Onyx Valve Co Capillary tubing introduces three effects on the performance of pressure-sensing instruments: 1. Temperature effects. Temperature changes cause the liquid inside the capillary tube to expand and contract, changing the volume of the fill fluid. The resulting error is a function of the total volume of the [...]
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