By Yakov Gelfgat, Mikhail Gelfgat, Yuri Lopatin
Presents targeted descriptions and case stories of different applied sciences built and time-honored in Russia. There are directional drilling, deep and ultra-deep good building, underbalanced drilling, rotary-turbine drills, underreamers, and retractable drill bits.
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Extra info for Advanced drilling solutions : lessons from the FSU. Volume 2
4–16d). In the suggested drilling method, a drillbit can only be run in combination with the PDM. If certain well intervals are to be drilled using the rotary drilling method or if operations to eliminate downhole problems are required, then the drillstring (5) section resting on the support structure is disconnected from the drillstring section in the borehole at the wellhead (7). The latter drillstring section is attached to a swivel and a kelly, and the required operations are performed in accordance with standard procedures.
Kurs-D 60 50 -20 - +85 70 50 1600 120 Kurs-Mini 30 0–120 70 1400 4 Gyrokursor 45 0–85 45 2500 18 0–180 ±0,25 0–180 ±0,3 0–70 ±0,25 deg. deg. 0–360 ±2,0 0–360 ±3 0–360 ±1,0 deg. deg. 0–360 ±0,5 0–180 ±1,5 NA ±180 ±1 b) Readout and Surface processing Unit System Type Parameter Housing dimensions Weight Operating Temperature Power (220V. +50 NA 15 15 PC Notebook 100 NA Introduction of a hydraulic signal transmission channel for the borehole survey MWD systems used for directional and horizontal well drilling applications was a significant step forward.
Petersburg developed an MWD system with a gyroscope that was to be run in combination with a turbodrill. 4° for the inclination. 5 m). Besides the cable MWD systems of the SKTBE Potential design bureau, the industry used NT-KURS cable MWD and applied the inclinometers with a gyroscope. These systems featured a slim downhole part, and they were used mainly for sidetracking from the cased boreholes. Currently, the Russian drilling industry uses standard magnetic directional survey systems of three diameters: 60 mm, 45 mm, and 30 mm, as well as the 45-mm system with a gyroscope.