Method for directional drilling
First Claim
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1. A method for directional drilling, comprising:
- rotating a drilling device comprising a drill pipe and a mining tool mounted on the drill pipe, whereby the mining tool is rotated at an essentially constant angular velocity for drilling in a straight line and the angular velocity of the rotation of the mining tool is periodically changed for drilling in a curved path.
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Abstract
In a method for directional drilling with the aid of a drilling device having a drill pipe and a mining tool which moves on an orbit, the tool moves at an essentially constant angular velocity during straight drilling and the angular velocity is periodically changed during curved drilling, in order to thus create a smooth transition from straight drilling to curved drilling and to achieve more precise curve control.
53 Citations
18 Claims
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1. A method for directional drilling, comprising:
rotating a drilling device comprising a drill pipe and a mining tool mounted on the drill pipe, whereby the mining tool is rotated at an essentially constant angular velocity for drilling in a straight line and the angular velocity of the rotation of the mining tool is periodically changed for drilling in a curved path. - View Dependent Claims (2, 3, 4, 5)
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6. A device for directional drilling, comprising:
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a rotationally driven pipe string; a mining tool carried by the driven pipe string and arranged eccentrically with respect to an axis of a bore hole; a controller for rotation of the pipe string and mining tool, whereby the controller rotates the mining tool at an essentially constant angular velocity for a drilling in a straight line and the angular velocity of the mining tool is periodically changed for drilling in a curved path. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification