Deep hole drilling method as well as tool for a deep hole drilling machine and deep hole drilling machine

Deep hole drilling method for producing a centrifugally cast nickel chromium iron alloy pipe with an inner profile that has a recess extending helically along the inner side of the centrifugally cast nickel chromium iron alloy pipe, comprising:

• pulling or pushing, with a deep hole drilling machine, a tool which comprises a basic body extending along a longitudinal axis and at least one cutting edge arranged on the outer circumference of the basic body at an oblique angle to the longitudinal axis, through the interior of the centrifugally cast nickel chromium iron alloy pipe while the tool is turned about its longitudinal axis (A) and/or the centrifugally cast nickel chromium iron alloy pipe is turned about its longitudinal axis (A), so that the at least one cutting edge completes a cut along a helical cutting line on the inner side of the centrifugally cast nickel chromium iron alloy pipe,
• or
• pushing or pulling, with a deep hole drilling machine, the centrifugally cast nickel chromium iron alloy pipe along its longitudinal axis (A) over a tool which comprises a basic body extending along a longitudinal axis and at least one cutting edge arranged on the outer circumference of the basic body at an oblique angle to the longitudinal axis, wherein the centrifugally cast nickel chromium iron alloy pipe is turned and/or the tool is turned about its longitudinal axis (A) so that the at least one cutting edge completes a cut along a helical cutting line on the inner side of the centrifugally cast nickel chromium iron alloy pipe;
• wherein the deep hole drilling machine is configured to drill holes with a diameter of 0.2 to 2000 mm and a drilling depth more than 3 times the diameter.