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United States Patent | 6,460,631 |
Dykstra , et al. | October 8, 2002 |
**Please see images for: ( Certificate of Correction ) ** |
A rotary drag bit and method for drilling subterranean formations including a bit body being provided with at least one cutter thereon exhibiting reduced, or limited, exposure to the formation so as to control the depth-of-cut of the at least one cutter, so as to control the volume of formation material cut per bit rotation, as well as to control the amount of torque experienced by the bit and an optionally associated bottomhole assembly regardless of the effective weight-on-bit. The exterior of the bit preferably includes a plurality of blade structures carrying at least one such cutter thereon and including a sufficient amount of bearing surface area to contact the formation so as to generally distribute the weight of the bit against the bottom of the borehole without exceeding the compressive strength of the formation rock.
Inventors: | Dykstra; Mark W. (Kingwood, TX), Heuser; William (The Woodlands, TX), Doster; Michael L. (Spring, TX), Zaleski, Jr.; Theodore E. (Spring, TX), Oldham; Jack T. (Willis, TX), Watts; Terry D. (Spring, TX), Ruff; Daniel E. (Kingwood, TX), Walzel; Rodney B. (Conroe, TX), Beuershausen; Christopher C. (Spring, TX) |
---|---|
Assignee: |
Baker Hughes Incorporated
(Houston,
TX)
|
Family ID: | 24969063 |
Appl. No.: | 09/738,687 |
Filed: | December 15, 2000 |
Application Number | Filing Date | Patent Number | Issue Date | ||
---|---|---|---|---|---|
383228 | Aug 26, 1999 | 6298930 | |||
Current U.S. Class: | 175/57; 175/428; 175/431 |
Current CPC Class: | E21B 10/42 (20130101); E21B 10/567 (20130101); E21B 10/573 (20130101); E21B 10/43 (20130101); E21B 12/04 (20130101); E21B 10/46 (20130101); E21B 10/5671 (20200501) |
Current International Class: | E21B 12/04 (20060101); E21B 10/00 (20060101); E21B 10/56 (20060101); E21B 10/42 (20060101); E21B 12/00 (20060101); E21B 10/46 (20060101); E21B 010/46 () |
Field of Search: | ;175/57,363,376,378,398,428,429,431,432 |
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