Durable hammer-union transmitter improves mud-pulse response

An innovative hammer-union pressure transmitter, which can be easily repaired or replaced on location, has improved the accuracy and response time for mud-pulse communications used in most directional-drilling operations.This sensor, which measures the hydraulic and pressure characteristics of the drilling fluid, plays a pivotal role in communicating with downhole measurement-while-drilling (MWD) tools.Since mid-1998, more than 300 of these devices have been installed in directional drilling applications worldwide, with only five reported failures. This reliability, in light of previous failure rates of 50% over a 6-month period, provides a testament to the integrity of the design.These d...

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