Bop drill string and tubing string monitoring system

Details Bop drill string and tubing string monitoring system Bop drill string and tubing string monitoring system

E - Fixed Constructions

21

B

E21B 47/09 (2012.01) E21B 33/06 (2006.01)

Patent

CA 2536451

The system monitors position of a drilling or tubing string coupling in BOP stack to provide safe opening/closing of RAM preventers around a drilling or tubing string in an underbalance drilling, snubbing or any operation on live wells. Top sensor device placed under rotary table and above BOP stack consists of 2 sets of sensors; one detects position of a coupling and the other measures drilling or tubing string movement and defines movement direction. Bottom sensor device, placed in between BOP stack and wellhead, consists of sensors that detect coupling position. Information from sensors is gathered by an electronic controller and sent to a PC with custom made specialized software for processing. Processed information is then displayed on the display unit as cross-section, or transparent digital image of BOP stack and its internal elements, as well as full image of drilling or tubing string and coupling in real time. Display unit is positioned conveniently for a driller.

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