Boring or penetrating the earth – Processes
Patent
1997-03-05
1999-09-28
Dang, Hoang C.
Boring or penetrating the earth
Processes
175385, 175399, 175408, E21B 1026
Patent
active
059572230
ABSTRACT:
A method and apparatus for reaming or enlarging a borehole using a bi-center bit with a stability-enhanced design. The cutters on the pilot bit section of the bi-center bit are placed and oriented to generate a lateral force vector longitudinally offset from, but substantially radially aligned with, the much larger lateral force vector generated by the reamer bit section. These two aligned force vectors thus tend to press the bit in the same lateral direction (which moves relative to the borehole sidewall as the bit rotates) along its entire longitudinal extent so that a single circumferential area of the pilot bit section gage rides against the sidewall of the pilot borehole, resulting in a reduced tendency for the bit to cock or tilt with respect to the axis of the borehole. Further, the pilot bit section includes enhanced gage pad area to accommodate this highly-focused lateral loading, particularly that attributable to the dominant force vector generated by the reamer bit section, so that the pilot borehole remains in-gage and round in configuration, providing a consistent longitudinal axis for the reamer bit section to follow.
REFERENCES:
patent: 1769921 (1930-07-01), Hansen
patent: 1959368 (1934-05-01), Kennedye
patent: 2045629 (1936-06-01), Betti
patent: 2308147 (1943-01-01), Ballagh
patent: 2671641 (1954-03-01), Hinkle
patent: 2715552 (1955-08-01), Lane
patent: 2877062 (1959-03-01), Hall et al.
patent: 3588199 (1971-06-01), Hopmans
patent: 3851719 (1974-12-01), Thompson et al.
patent: 3942824 (1976-03-01), Sable
patent: 4080010 (1978-03-01), Young
patent: 4580642 (1986-04-01), Gosch
patent: 4600063 (1986-07-01), Beasley
patent: 4610307 (1986-09-01), Jurgens et al.
patent: 4630690 (1986-12-01), Beasley et al.
patent: 4698794 (1987-10-01), Kruger et al.
patent: 4729438 (1988-03-01), Walker et al.
patent: 4739842 (1988-04-01), Kruger et al.
patent: 4807708 (1989-02-01), Forrest et al.
patent: 4817740 (1989-04-01), Beimgraben
patent: 4854403 (1989-08-01), Ostertag et al.
patent: 4984633 (1991-01-01), Langer et al.
patent: 5050692 (1991-09-01), Beimgraben
patent: 5094304 (1992-03-01), Briggs
patent: 5099931 (1992-03-01), Krueger et al.
patent: 5099934 (1992-03-01), Barr
patent: 5150757 (1992-09-01), Nunley
patent: 5180021 (1993-01-01), Champion et al.
patent: 5222565 (1993-06-01), Collinsworth
patent: 5307885 (1994-05-01), Kuwana et al.
patent: 5363931 (1994-11-01), Moriarty
patent: 5402856 (1995-04-01), Warren et al.
patent: 5423389 (1995-06-01), Warren et al.
patent: 5437342 (1995-08-01), Powada
patent: 5465759 (1995-11-01), Carlson et al.
patent: 5474143 (1995-12-01), Majkovic
patent: 5495899 (1996-03-01), Pastusek et al.
patent: 5497842 (1996-03-01), Pastusek et al.
patent: 5522467 (1996-06-01), Stevens et al.
patent: 5542454 (1996-08-01), Carlson et al.
patent: 5601151 (1997-02-01), Warren
patent: 5678644 (1997-10-01), Fielder
patent: 5765653 (1998-06-01), Doster et al.
Casto, Robert G., et al., "Use of Bicenter PDC Bit reduces Drilling Cost," Nov. 13, 1995, Oil and Gas Journal, pp. 92-96.
Csonka, G., et al., "Ream While Drilling Technology Applied Successfully Offshore Australia," Oct. 1996, SPE International, pp. 271-278.
Le Blanc, "Reaming-While-Drilling Keys Effort to Reduce Tripping of Long Drillstrings," Apr. 1996, Offshore, pp. 30-32.
Myhre, K., "Application of Bicenter Bits in Well-Deepening Operations," Mar. 2, 1990, SPE International, pp. 131-137.
Rothe, Jorge Rodriquez, "Ream-While-Drilling Tool Cuts Costs of Three Venezulean Wells," Jan. 13, 1997, Oil and Gas Journal, pp. 33-40.
Sketchler, B.C. "New Bi-Center Technology Proves Effective in Slim Hole Horizontal Well," Mar. 2, 1995, SPE International, pp. 559-567.
Warren, T.M., "Simultaneous Drilling and Reaming with Fixed Blade Reamers," Oct. 22, 1995, SPE International, pp. 1-11.
Doster Michael L.
Oldham Jack T.
Baker Hughes Incorporated
Dang Hoang C.
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