Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1986-08-15
1988-04-26
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 45, E21B 708, E21B 47022
Patent
active
047398418
ABSTRACT:
In the representative embodiments of the present invention described herein, new and improved methods and apparatus are disclosed for measuring various forces acting on an intermediate body between the lower end of a drill string and the earth-boring apparatus coupled thereto whereby the magnitudes and angular directions of bending moments and side forces acting on the earth-boring apparatus can be readily determined so that predictions can be made of the future course of excavation of the apparatus.
REFERENCES:
patent: 2930137 (1960-03-01), Arps
patent: 4303994 (1981-12-01), Tanguy
patent: 4324297 (1982-04-01), Denison
patent: 4384483 (1983-05-01), Dellinger et al.
patent: 4445578 (1984-05-01), Millheim
patent: 4479564 (1984-10-01), Tanguy
patent: 4662458 (1987-05-01), Ho
"Application of Side-Force Analysis and MWD to Reduce Drilling Costs" by R. G. Whitten, Mar. 1987, SPE/IADC 16113.
"Three-Dimensional Bottomhole Assembly Model Improves Directional Drilling" by P. M. Jogi, T. M. Burgess, J. P. Bowling, Feb. 1986, IADC/SPE 14768.
"Field Measurements of Downhole Drillstring Vibrations" by S. F. Wolf, M. Zacksenhouse, A. Arian, Sep. 1985, SPE 14330.
"Side Cutting Characteristics of Rock Bits and Stabilizers While Drilling" by K. K. Millheim & T. M. Warren, Oct. 1978, SPE 7518.
"Analysis of Drillstrings in Curved Boreholes" by F. J. Fischer, Oct. 1974, SPE 5071.
"Maximum Permissible Drillbit Weight from Drillcollars in Inclined (Directional) Boreholes" by B. J. Mitchell, Oct. 1976, SPE 6058.
"New Drilling-Research Tool Shows What Happens Down Hole" Editor's Note, The Oil and Gas Journal, Jan. 8, 1968.
"Behavior of Multiple-Stabilizer Bottom-Hole Assemblies" by Keith Millheim, The Oil and Gas Journal, Jan. 1, 1979.
Anadrill Incorporated
Kisliuk Bruce M.
Novosad Stephen J.
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