Directional/complex wells

Surface Torque/Tension Measurements Used To Detect and Calculate Stick/Slip

A surface-based torque and tension sub (TTS) was used to perform measurements while drilling several extended-reach horizontal wells.

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Fig. 1: The TTS. The left-hand picture shows a standalone unit. The middle diagram is an assembly drawing of the main body. The picture on the right shows the TTS installed on a topdrive system.

A surface-based torque and tension sub (TTS) was used to perform measurements while drilling several extended-reach horizontal wells. A filtered version of surface torque was used to calculate a stick/slip metric, which was compared with stick/slip measurements from a downhole tool. The results show that there is reasonable correlation between surface and downhole metrics. A comparison was also made between hookload measured with a deadline sensor and tension measurement from the surface sub.

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