# US 8,739,903 B2 · Adjustable drill bit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,903 B2 - Document ID: US8739903B2 - Status: Granted - Kind: B2 - Application number: 12/744,332 - Filed: 2008-11-20 - Published: 2010-12-02 - Granted: 2014-06-03 - Earliest claimed: 2007-11-23 - Assignees: Schlumberger Technology Corporation - Applicants: Henri Denoix; Pierre-Jèrõme Acquaviva; Eric Lavrut - Inventors: Henri Denoix; Pierre-Jèrõme Acquaviva; Eric Lavrut - Web page: https://patentgrep.com/patent/US8739903B2 ## CPC - E21B 10/62: characterised by parts, e.g. cutting elements, which are detachable or adjustable (E21B10/64 takes precedence; for roller bits E21B10/20; for augers E21B10/44) - Y10T 408/909: Having peripherally spaced cutting edges - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A rotary drill bit is provided comprising a bit body, which includes a connecting portion for connection to a conveyance and a drilling portion. The drilling portion includes a plurality of cutting elements each having at least one cutting surface, the drilling portion being operable in at least two different drilling orientations, and the drilling surface being rotatable in one of two opposing directions, being a first direction and an opposing second direction. ## Claims ### Claim 1 A rotary drill bit comprising: a bit body having a connecting portion for connection to a conveyance and a drilling portion; the drilling portion including a drilling surface having a plurality of cutting elements, each cutting element having at least a first cutting surface and a second cutting surface, the drilling portion being operable in at least two different drilling orientations; and the drilling surface being rotatable in two opposing directions comprising a first direction and a second direction opposite from the first direction. ### Claim 2 (depends on 1) A rotary drill bit as claimed in claim 1, wherein the first cutting surface is used for drilling when the drilling portion is rotated in a first direction. ### Claim 3 (depends on 1) A rotary drill bit as claimed in claim 1, wherein the second cutting surface is used when the drilling portion is rotated in a second direction. ### Claim 4 (depends on 1) A rotary drill bit as claimed in claim 1, wherein an adjustment means is located on each cutting element for adjusting the configuration of the cutting element while in use. ### Claim 5 (depends on 4) A rotary drill bit as claimed in claim 4, wherein the positional orientation of the cutting elements in relation to the surface of the drilling portion is adjustable. ### Claim 6 (depends on 4) A rotary drill bit as claimed in claim 4, wherein the height of the cutting surface above the surface of the drilling portion is adjustable. ### Claim 7 (depends on 4) A rotary drill bit as claimed in claim 4, wherein the angular displacement between a cutting surface and the surface of the drilling portion is adjustable. ### Claim 8 (depends on 4) A rotary drill bit as claimed in claim 4, wherein the adjustment means is remotely controlled. ### Claim 9 (depends on 1) A rotary drill bit as claimed in claim 1, wherein the rotary drill bit is used with electronically controlled drilling equipment, and the cutting elements are electronically adjustable. ### Claim 10 (depends on 1) A rotary drill bit as claimed in claim 1, wherein at least a portion of the cutting surfaces on the cutting elements are of the PDC type. ### Claim 11 (depends on 1) A rotary drill bit as claimed in claim 1, wherein the drill bit is used with conventional drill pipes. ### Claim 12 (depends on 1) A rotary drill bit as claimed in claim 1, wherein the drill bit is configurable downhole in response to changing conditions in the downhole environment. ### Claim 13 A method, comprising: rotating a rotary drill bit in a first rotational direction within a well to extend the well, wherein the rotary drill bit comprises a plurality of cutting elements, wherein: at least one of the plurality of cutting elements comprises first and second cutting surfaces; and rotating the rotary drill bit in the first rotational direction extends the well by removing material with the first cutting surface of the at least one of the plurality of cutting elements; and rotating the rotary drill bit in a second rotational direction within the well to further extend the well, wherein the first and second rotational directions are substantially opposite, and wherein rotating the rotary drill bit in the second rotational direction extends the well by removing material with the second cutting surface of the at least one of the plurality of cutting elements. ### Claim 14 (depends on 13) The method of claim 13 further comprising conveying the rotary drill bit within the well via one of: a wireline; and a drill string. ### Claim 15 (depends on 13) The method of claim 13 further comprising modifying at least one of the plurality of cutting elements after rotating the rotary drill bit in the first rotational direction but before rotating the rotary drill bit in the second rotational direction. ### Claim 16 (depends on 15) The method of claim 15 wherein modifying at least one of the plurality of cutting elements comprises changing an angle of at least one of the plurality of cutting elements. ### Claim 17 (depends on 15) The method of claim 15 wherein modifying at least one of the plurality of cutting elements comprises changing a height of at least one of the plurality of cutting elements. ### Claim 18 (depends on 15) The method of claim 15 wherein modifying at least one of the plurality of cutting elements comprises retracting at least one of the plurality of cutting elements into the rotary drill bit.