... toolface transition process drilling contractor trajectory dysfunction operator Background An operator is delivering wells in the Bakken Field in North Dakota with a track record going back to 1951. The operator is collaborating with a drilling contractor to apply over 70 years of learnings...

... analysis Directional Drilling testcase azimuth algorithm algorithm azimuth estimate drilling operation directional measurement disturbance inclination Upstream Oil & Gas parametric uncertainty toolface Aziz downhole environment equation new algorithm society of petroleum engineers...

... vibrations. This allows mitigation strategies to be quickly evaluated and implemented based on adequacy and performance, preventing damage and improving performance. In addition, high-frequency toolface and survey data promoted directional drilling and sliding-drilling efficiency in the build and horizontal...

... of the relief well relative to the blow out well. While drilling, the MWD in the drilling BHA provides regular toolface updates of the drilling BHA. The Directional Driller uses this target information to determine in what direction the well needs to be drilled. He determines the desired toolface of where...

... ( 1 + ζ 2 2 ) ] } Initial Toolface and MD Defined Check that 0 ≤ S 12 / R < π so that the subtended angle α remains within the required bounds. (10) α = S 12 / R (11) t _ 2 = cos α t _ 1 + sin α ( cos τ 1 h...

... in slimhole drilling with 6-in. bits. Test results show the RSS is controllable and predictable in behavior, and produces superior borehole quality. drilling operation borehole deflection concrete block rotary steerable system waveform bias unit toolface directional drilling systems...

... Abstract We present a novel method for analysing the position uncertainty of directional surveys. By this method, the uncertainty can be accurately calculated by conceptually simple analytical formulae. The theory covers any correlation in measurement error and any correlation in toolface...