Turbine and rotary drilling. Possibility of layouts having some misalignment

Oleg V. Filimonov Horizon NPF Ltd October, Russian Federation oleg1543@mail.ru
We consider some of the positive and negative aspects of using a turbo-rotor method of drilling wells, the necessity of limiting theangle of tilt used in this layout, the technology of drilling the most dangerous areas.
Materials and methods
1. Analysis of the well vpisyvaemosti used hydraulic screw downhole motors (PDM) with some skew angle; 2. Calculation of statistical and dynamic stresses in the housing PDM having some misalignment when drilling with the drill string rotation; 3. Calculation of allowable housingdevelopments PDM under cyclic loading.
The results of the analysis and calculations are recommended for use technology service company in determining the allowable skew angle configurations used for the turbine and rotary method of drilling wells.
1. To use a turbo-rotor method of drilling with the drill string rotation is necessary tolimit the skew angle of the layout in terms vpisyvaemosti well profile with the rock hardness and coefficient of cavernous. 2. By rotating the drill string having a skewangle from the arrangement in the curved section of the well is necessary to limit speed and WOB to exit this portion of the BHA. 3. Turbine and rotary drilling method, depending on the size of the layout created tension with the angle of tilt, increases cyclic loading with shock and vibration, entails additional wear and shorten the life of BHA.
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turbine and rotary drilling method the amount of skew angle