Fixed blade fixed cutter hole opener

Details Fixed blade fixed cutter hole opener Fixed blade fixed cutter hole opener

E - Fixed Constructions

21

B

E21B 10/26 (2006.01)

Patent

CA 2427254

A hole opener including a tool body having upper and lower ends. The upper and lower ends may be coupled to adjacent drilling tools. At least two blades are formed on the tool body and are arranged so that the hole opener is positioned concentric with a wellbore, and cutting elements are located on the blades. The at least two blades and the cutting elements are arranged to increase a diameter of a previously drilled wellbore. A hole opener including a tool body having upper and lower ends. The upper and lower ends may be coupled to adjacent drilling tools. At least two blades are formed on the tool body and are arranged so that the hole opener is positioned concentric with a wellbore, and cutting elements are located on the blades. The hole opener includes a pilot hole conditioning section. The pilot hole conditioning section includes at least two pilot blades formed on the tool body in a position axially ahead of the blades. The pilot blades include a taper at a downhole end and gage pads positioned at selected diameters. At least one cutting element is disposed on the pilot blades.

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