Straight hole drilling method and assembly

Details Straight hole drilling method and assembly Straight hole drilling method and assembly

E - Fixed Constructions

21

B

255/24

E21B 7/00 (2006.01) E21B 7/04 (2006.01) E21B 17/10 (2006.01) E21B 17/22 (2006.01)

Patent

CA 1333281

A drilling assembly comprises a matched bit and stabilizer in which the maximum outer diameter of the bit and stabilizer have been measured and machined to be within predetermined tolerances. The maximum stabilizer diameter is in the range of .003 - .025 inches in diameter less than the measured bit O.D. Preferably, the maximum stabilizer diameter is in the range of .005 - .010 inches in diameter less than the measured bit O.D. A series of stabilizer assemblies are provided, including a single stabilizer assembly, a double stabilizer assembly, a hole straightening assembly, a large bit O.D. drilling assembly and a small bit O.D. drilling assembly.

610622

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