WO2008124469A1 - Système, procédé, et dispositif pour la formation de surfaces de poussée profilées entre une rondelle de butée et la tête d'un outil de forage à trépan à molettes - Google Patents

Système, procédé, et dispositif pour la formation de surfaces de poussée profilées entre une rondelle de butée et la tête d'un outil de forage à trépan à molettes Download PDF

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Publication number
WO2008124469A1
WO2008124469A1 PCT/US2008/059218 US2008059218W WO2008124469A1 WO 2008124469 A1 WO2008124469 A1 WO 2008124469A1 US 2008059218 W US2008059218 W US 2008059218W WO 2008124469 A1 WO2008124469 A1 WO 2008124469A1
Authority
WO
WIPO (PCT)
Prior art keywords
thrust
bearing
head
earth boring
cone
Prior art date
Application number
PCT/US2008/059218
Other languages
English (en)
Inventor
Zahradnik Anton
Eric Sullivan
Aaron Dick
Don Nguyen
Terry Koltermann
Scott Shu
Original Assignee
Baker Hughes Incorporated
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 Baker Hughes Incorporated filed Critical Baker Hughes Incorporated
Priority to CA002682604A priority Critical patent/CA2682604A1/fr
Publication of WO2008124469A1 publication Critical patent/WO2008124469A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details

Definitions

  • the present invention relates in general to roller cone drill bits and, in particular, to an improved system, method, and apparatus for an earth boring bit having curved thrust faces between a thrust washer, bearing head and a cone.
  • One type of earth boring bit for drilling oil and gas wells has a bit body with at least one roller cone. Each cone is mounted on a cylindrical bearing head that depends downward and inward from a bit leg of the bit body. Annular thrust faces are formed on the bearing head and in the cone cavity for reacting against downward thrust. The thrust face of the bearing head is in a plane that is perpendicular to an axis of the bearing head. Likewise, the thrust face of the cone is formed in a plane that is perpendicular to the rotational axis of the cone. Initially, the thrust faces are parallel to each other. Lubricant is supplied from a lubricant reservoir to the spaces between the bearing head and the cone.
  • the thrust faces typically do not run precisely parallel to each other.
  • the bearing head deflects slightly because it is cantilevered from the bit leg.
  • the cone can tilt slightly relative to the bearing head (i.e., axial rotation). This slight misalignment of the cone axis relative to the bearing head axis results in a circumferentially converging-diverging space between the thrust faces.
  • This bearing misalignment concentrates thrust bearing contact loads, which is detrimental to the performance and life of the components.
  • One embodiment of a system, method, and apparatus for a roller cone bit utilizes a thrust washer between the cone and the head. As the roller cone bit is drilling, there is radial rotation between the head and the cone. Due to clearance in the bearing and interaction between the cone and the earthen formation, there also can be slight axial rotation (i.e., cone tilting) between the head and cone with respect to the head axis.
  • a thrust washer constructed in accordance with the present invention and located between the thrust surfaces of the head and the cone allows for the required radial rotation between the cone and thrust washer during drilling operations.
  • the thrust washer accommodates the axial rotation between the cone and the head.
  • the mating thrust surfaces or faces between the thrust washer and the head are contoured to allow the thrust washer to rotate axially with the cone.
  • the head may comprise a concave thrust surface while the thrust surface of the thrust washer has a complementary convex shape. This configuration results in more bearing contact between the thrust washer and the cone.
  • the thrust washer may be formed from a variety of bearing materials, or a combination of materials such as 440C, bronze, carbide, diamond, etc.
  • the radial rotation between the thrust washer and head may be prevented with the use of a pin, dowel, etc., extending therebetween.
  • Figure 1 is a quarter, vertical sectional view illustrating a portion of an earth boring bit constructed in accordance with the invention
  • Figure 2 is an enlarged side view of the bearing head of Figure 1 and is constructed in accordance with the invention.
  • Figure 3 is an enlarged sectional side view of the bearing head of Figure 1 and is constructed in accordance with the invention.
  • a bit 11 has a body 13 with a threaded shank 15 on its upper end for connection to a drill string (not shown).
  • Body 13 typically has three bit legs 17 (only one shown), and each leg 17 has a depending bearing head 19.
  • Each bearing head 19 inclines downward and inward toward an axis 20 of rotation of body 13.
  • Each bearing head 19 has a cylindrical surface 21 that is concentric with a bearing head axis 23.
  • the radially inward end of bearing head 19 has a nose 25.
  • Nose 25 also is cylindrical but has a smaller diameter than bearing surface 21.
  • An annular bearing head thrust face 27 is formed on a shoulder that circumscribes nose 25.
  • a roller cone 29 is mounted to each head 19 and has an axial cavity with a cylindrical portion 31 that fits around bearing surface 21 of head 19.
  • Roller cone 29 rotates on head 19 about its roller cone axis, which may coincide with bearing head axis 23.
  • Each roller cone 29 has a plurality of cutting elements 35 on its exterior.
  • Cutting elements 35 may be tungsten carbide inserts press-fitted into holes in the body of cone 29. Alternately, cutting elements 35 could be teeth milled into the exterior surface of the body of cone 29.
  • Cone 29 is retained conventionally on bearing head 19, which in this example is by a plurality of balls 37. Balls 37 engage mating grooves formed in cone 29 and on bearing head 19.
  • Lubricant passages 39 supply lubricant or grease to the spaces between cylindrical surfaces 21, 31 and between thrust faces 27 and 33.
  • a pressure compensator 41 reduces the pressure differential between the lubricant within passages 39 and drilling fluid pressure on the exterior of bit 11.
  • each roller cone 29 has an annular axial thrust face 33 within its cavity that faces upward and outward toward bearing head thrust face 27.
  • a thrust washer 51 is located between and in dynamic engagement with the thrust faces 27, 33 of the bearing head 19 and the roller cone 29, respectively.
  • the thrust washer 51 has a thrust face 53 that is non-orthogonally contoured and complementary in shape to the thrust face 27 of the bearing head 19. This increases bearing contact between the thrust washer 51 and the roller cone 29 during axial rotation between the head and cone.
  • the thrust washer 51 permits radial rotation (see arrow 55) between the cone 29 and the thrust washer 51, and accommodates axial rotation (see arrow 57) between the cone 29 and the head 19 with respect to the bearing head axis 23.
  • the thrust washer 51 does not permit or restrict the axial rotation 57 between the head 19 and cone 29. If the thrust washer 51 is pinned 65 to the head 19 and there is a spherical radius 59 on the head 19 and thrust washer 51, the thrust washer 51 will stay aligned with the cone 29 and "tilt" relative to the head 19.
  • the pin 65 restricts the thrust washer 51 from radial rotation 55 relative to the head 19. There is sufficient clearance between the pin 65 and hole in the thrust washer 51 to allow a limited amount of axial rotation 57. This allows the thrust washer 51 to rotate 57 and align with the cone thrust surface 33, maintaining maximum contact area.
  • the thrust faces 53, 27 of the thrust washer 51 and the bearing head 19 are non-orthogonally contoured and complementary in shape.
  • the thrust faces 63, 33 of the thrust washer 51 and the roller cone 29 are non-orthogonally contoured and complementary in shape.
  • both thrust faces 53, 63 of the thrust washer 51 and the thrust faces 27, 33 of both head 19 and roller cone 29 are non-orthogonally contoured and complementary in shape, hi any of these embodiments, the contoured thrust faces that are selected may be formed on a spherical radius 59 such as the one illustrated in Figure 3.
  • the thrust face 53 of the thrust washer 51 is convex, and the thrust face 27 of the bearing head 19 is concave (see, e.g., Figures 2 and 3, which are exaggerated).
  • the thrust face 53 of the thrust washer 51 may be concave, and the thrust face 27 of the bearing head 19 may be convex.
  • the thrust face 63 of thrust washer 51 is flat and parallel to the thrust face 33 of the roller cone 29, which is orthogonal relative to bearing head axis 23.
  • the thrust washer 51 may be formed from one of a variety of bearing materials, or a combination of materials such as 440C, other stainless steel materials, bronze, carbide, carbide-containing materials, diamond, etc. Radial rotation between the thrust washer 51 and head 19 or cone 29 may be prevented with the use of a pin 65, dowel, etc., extending therebetween.

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)

Abstract

Le fait de placer une rondelle de butée entre les surfaces de poussée de la tête et du trépan d'un outil de forage permet d'assurer une rotation radiale entre le trépan, la rondelle de butée et la tête durant l'activité. Ladite rondelle permet aussi d'assurer une rotation axiale entre le trépan et la tête. Les surfaces de poussée qui s'adaptent, entre la rondelle en question et la tête sont profilées, ce qui permet à la rondelle considérée d'avoir une rotation axiale avec le trépan et d'augmenter le contact porteur entre cette rondelle et le trépan.
PCT/US2008/059218 2007-04-05 2008-04-03 Système, procédé, et dispositif pour la formation de surfaces de poussée profilées entre une rondelle de butée et la tête d'un outil de forage à trépan à molettes WO2008124469A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002682604A CA2682604A1 (fr) 2007-04-05 2008-04-03 Systeme, procede, et dispositif pour la formation de surfaces de poussee profilees entre une rondelle de butee et la tete d'un outil de forage a trepan a molettes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/784,026 US20080245577A1 (en) 2007-04-05 2007-04-05 System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit
US11/784,026 2007-04-05

Publications (1)

Publication Number Publication Date
WO2008124469A1 true WO2008124469A1 (fr) 2008-10-16

Family

ID=39672048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/059218 WO2008124469A1 (fr) 2007-04-05 2008-04-03 Système, procédé, et dispositif pour la formation de surfaces de poussée profilées entre une rondelle de butée et la tête d'un outil de forage à trépan à molettes

Country Status (3)

Country Link
US (1) US20080245577A1 (fr)
CA (1) CA2682604A1 (fr)
WO (1) WO2008124469A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854178A (zh) * 2019-03-27 2019-06-07 山东易斯特工程工具有限公司 一种旋挖钻机用滚轮钻头

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8961019B2 (en) 2011-05-10 2015-02-24 Smith International, Inc. Flow control through thrust bearing assembly
RU2472914C1 (ru) * 2011-09-08 2013-01-20 Николай Митрофанович Панин Буровое долото
CN110485930B (zh) * 2019-08-26 2020-04-28 四川宝石机械石油钻头有限责任公司 Pdc-牙轮复合钻头
CN110469271B (zh) * 2019-08-26 2020-04-28 四川宝石机械石油钻头有限责任公司 三牙轮钻头及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410284A (en) * 1982-04-22 1983-10-18 Smith International, Inc. Composite floating element thrust bearing
US5161898A (en) * 1991-07-05 1992-11-10 Camco International Inc. Aluminide coated bearing elements for roller cutter drill bits
US6260635B1 (en) * 1998-01-26 2001-07-17 Dresser Industries, Inc. Rotary cone drill bit with enhanced journal bushing
US6354740B1 (en) * 1995-07-28 2002-03-12 Camco International Inc. Rolling cutter drill bits
US6474424B1 (en) * 1998-03-26 2002-11-05 Halliburton Energy Services, Inc. Rotary cone drill bit with improved bearing system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4722615A (en) * 1986-04-14 1988-02-02 A-Z International Tool Company Drilling apparatus and cutter therefor
GB9415668D0 (en) * 1994-08-03 1994-09-21 Camco Int Improvements in or relating to rolling cutter drill bits
US6416224B1 (en) * 1995-07-28 2002-07-09 Schlumberger Technology Corporation Rolling cutter drill bits
EP1051561B1 (fr) * 1998-01-26 2003-08-06 Halliburton Energy Services, Inc. Trepan a cone rotatif a rebord de butee ameliore

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410284A (en) * 1982-04-22 1983-10-18 Smith International, Inc. Composite floating element thrust bearing
US5161898A (en) * 1991-07-05 1992-11-10 Camco International Inc. Aluminide coated bearing elements for roller cutter drill bits
US6354740B1 (en) * 1995-07-28 2002-03-12 Camco International Inc. Rolling cutter drill bits
US6260635B1 (en) * 1998-01-26 2001-07-17 Dresser Industries, Inc. Rotary cone drill bit with enhanced journal bushing
US6474424B1 (en) * 1998-03-26 2002-11-05 Halliburton Energy Services, Inc. Rotary cone drill bit with improved bearing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854178A (zh) * 2019-03-27 2019-06-07 山东易斯特工程工具有限公司 一种旋挖钻机用滚轮钻头

Also Published As

Publication number Publication date
US20080245577A1 (en) 2008-10-09
CA2682604A1 (fr) 2008-10-16

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