EP1039095A3 - Downhole drill bit - Google Patents

Downhole drill bit Download PDF

Info

Publication number
EP1039095A3
EP1039095A3 EP00302231A EP00302231A EP1039095A3 EP 1039095 A3 EP1039095 A3 EP 1039095A3 EP 00302231 A EP00302231 A EP 00302231A EP 00302231 A EP00302231 A EP 00302231A EP 1039095 A3 EP1039095 A3 EP 1039095A3
Authority
EP
European Patent Office
Prior art keywords
reamer
pilot
drill bit
section
downhole drill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00302231A
Other languages
German (de)
French (fr)
Other versions
EP1039095A2 (en
EP1039095B1 (en
Inventor
Coy M. Fielder
Rogerio H. Silva
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ReedHycalog LP
Original Assignee
Diamond Products International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Diamond Products International Inc filed Critical Diamond Products International Inc
Publication of EP1039095A2 publication Critical patent/EP1039095A2/en
Publication of EP1039095A3 publication Critical patent/EP1039095A3/en
Application granted granted Critical
Publication of EP1039095B1 publication Critical patent/EP1039095B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)

Abstract

A downhole tool has a body defining a proximal end for connection to a drill string and a distal end which defines a pilot section and an intermediate reamer section. Both the pilot and the reamer sections define cutting surfaces. The body defines a rotational diameter and a smaller pass-through diameter. Stabilizing means arc coupled to the body opposite either the reamer or the pilot section .
EP00302231A 1999-03-19 2000-03-20 Downhole drill bit Expired - Lifetime EP1039095B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12511999P 1999-03-19 1999-03-19
US125119 1999-03-19

Publications (3)

Publication Number Publication Date
EP1039095A2 EP1039095A2 (en) 2000-09-27
EP1039095A3 true EP1039095A3 (en) 2001-04-11
EP1039095B1 EP1039095B1 (en) 2005-05-18

Family

ID=22418279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00302231A Expired - Lifetime EP1039095B1 (en) 1999-03-19 2000-03-20 Downhole drill bit

Country Status (2)

Country Link
EP (1) EP1039095B1 (en)
DE (1) DE60020185T2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6659207B2 (en) 1999-06-30 2003-12-09 Smith International, Inc. Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability
GB2376490B (en) * 1999-06-30 2003-05-28 Smith International Bi-Centre drill bit
US6269893B1 (en) * 1999-06-30 2001-08-07 Smith International, Inc. Bi-centered drill bit having improved drilling stability mud hydraulics and resistance to cutter damage
US6394200B1 (en) 1999-10-28 2002-05-28 Camco International (U.K.) Limited Drillout bi-center bit
GB0820063D0 (en) 2008-11-03 2008-12-10 Reedhycalog Uk Ltd Drilling tool
US8327957B2 (en) * 2010-06-24 2012-12-11 Baker Hughes Incorporated Downhole cutting tool having center beveled mill blade
US8851205B1 (en) 2011-04-08 2014-10-07 Hard Rock Solutions, Llc Method and apparatus for reaming well bore surfaces nearer the center of drift
US9739094B2 (en) * 2013-09-06 2017-08-22 Baker Hughes Incorporated Reamer blades exhibiting at least one of enhanced gage cutting element backrakes and exposures and reamers so equipped
US11111739B2 (en) 2017-09-09 2021-09-07 Extreme Technologies, Llc Well bore conditioner and stabilizer
AU2018347352B2 (en) 2017-10-10 2024-02-15 Extreme Technologies, Llc Wellbore reaming systems and devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1249499A (en) * 1959-11-19 1960-12-30 Europ De Turboforage Soc ground drilling equipment
EP0058061A2 (en) * 1981-02-07 1982-08-18 DRILLING & SERVICE U.K. LIMITED Tools for underground formations
US5678644A (en) * 1995-08-15 1997-10-21 Diamond Products International, Inc. Bi-center and bit method for enhancing stability
GB2317632A (en) * 1996-09-25 1998-04-01 Smith International Drill bit having a serrated cutting structure for plastic shale drilling
US5765653A (en) * 1996-10-09 1998-06-16 Baker Hughes Incorporated Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1249499A (en) * 1959-11-19 1960-12-30 Europ De Turboforage Soc ground drilling equipment
EP0058061A2 (en) * 1981-02-07 1982-08-18 DRILLING & SERVICE U.K. LIMITED Tools for underground formations
US5678644A (en) * 1995-08-15 1997-10-21 Diamond Products International, Inc. Bi-center and bit method for enhancing stability
GB2317632A (en) * 1996-09-25 1998-04-01 Smith International Drill bit having a serrated cutting structure for plastic shale drilling
US5765653A (en) * 1996-10-09 1998-06-16 Baker Hughes Incorporated Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Hughes Christensen's Drill Out RWD tool", INTERNET ARTICLE, XP002154028, Retrieved from the Internet <URL:http://www.bakerhughes.com/hcc/holeopen/dosrwd.htm> [retrieved on 20001128] *
CSONKA, G. ET AL.: "Ream While Drilling Technology Applied Succesfully Offshore Australia", SPE36990, 28 October 1996 (1996-10-28), Adelaide, pages 271 - 278, XP002153941 *
ROTHE J R ET AL: "REAM-WHILE-DRILLING TOOL CUTS COSTS OF THREE VENEZUELAN WELLS", OIL AND GAS JOURNAL,US,PENNWELL PUBLISHING CO. TULSA, vol. 95, no. 2, 13 January 1997 (1997-01-13), pages 33 - 34,36,38-40, XP000685109, ISSN: 0030-1388 *

Also Published As

Publication number Publication date
EP1039095A2 (en) 2000-09-27
DE60020185D1 (en) 2005-06-23
DE60020185T2 (en) 2006-01-12
EP1039095B1 (en) 2005-05-18

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