The maximum achievable level of error in measuring the mechanical drilling speed
https://doi.org/10.31660/0445-0108-2020-5-53-63
Abstract
The article is devoted to the problem of mechanical velocity measurement in deep wells. The standard error limit is set at 2,5 %. However, the existing methods of measurement of drilling parameters have large errors associated with the presence of friction forces in the well, temperature changes with depth, column layout, etc. The error is also introduced by the discrete measurement method, which manifests itself in smoothing of the useful signal and delay in the information about the speed value by half the averaging interval. The aim of the work is to determine the realistically achievable values of the mechanical drilling speed. For this, the reduced error was calculated according to the upper limit of measurement in accordance with GOST. The dependence of the error on the depth of the well and the drilling speed is graphically presented. The error estimation for different type of drilling and different column layout is given. The analysis of the obtained results showed that the set value of the error can be achieved not in the entire range of changes in the speed and depth of the well bottom.
About the Authors
V. A. Kuznetsov
Samara State Technical University
Russian Federation
Russian Federation
Vladimir A. Kuznetsov, Candidate of Engineering, Associate Professor at the Department of Information and Measuring Equipment
Samara
S. A. Mikheev
Samara State Technical University
Russian Federation
Russian Federation
Sergey A. Mikheev, Postgraduate at the Department of Information and Measuring Equipment
Samara
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Review
For citations:
Kuznetsov V.A., Mikheev S.A. The maximum achievable level of error in measuring the mechanical drilling speed. Oil and Gas Studies. 2020;(5):53-63. (In Russ.) https://doi.org/10.31660/0445-0108-2020-5-53-63
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