Paradigm Drilling Services Ltd Camiestone Road, Thainstone, Inverurie, Aberdeenshire, AB51 5GT Tel: +44 (0)1224 725888 drilling@paradigm.eu www.paradigm.eu/drilling 1 / 2 1 / 2 Traction Drill Collars Generate Downhole Traction Objective Two 4 3/4” Traction Drill Collars (TDC’s) were introduced to a rotarysteerable assembly, directly above the upper NMDC, to evaluate the traction force produced. Data subs were also run to measure the additional WOB, and to see what effect the tools had on vibration within the assembly and at the bit. Method A rotary BHA was run, with stabilisers sized and spaced to simulate a typical RSS. Data subs were run at the bit, and at the top of the BHA, and three runs were undertaken to drill 240’, 305’ and 271’ of 6 1/8” Horizontal Hole. The two TDC tools b

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