FIELD: drilling operations.
SUBSTANCE: systems of extension-type elements for down-hole tools are proposed. The extension-type elements of down-hole tools include a component of guiding extension perpendicular to the tool axis. A force is applied to the extension-type element. The extension-type elements contain a first cross-section that contains a component to guide the extension, a first surface made to receive the first force component of the specified force perpendicular to the first surface, and a second surface. The second surface is designed to transmit at least part of the first force component of the specified force to the body of the down-hole tool. The second surface and the component of guiding the extension perpendicular to the tool axis form the first angle, which measures from 0° to 90°.
EFFECT: improved drill stems and methods of their use for drilling a wellbore and cementing a wellbore in one pass.
11 cl, 11 dwg
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