[go: up one dir, main page]

WO2011121391A1 - Trépan - Google Patents

Trépan Download PDF

Info

Publication number
WO2011121391A1
WO2011121391A1 PCT/IB2010/051357 IB2010051357W WO2011121391A1 WO 2011121391 A1 WO2011121391 A1 WO 2011121391A1 IB 2010051357 W IB2010051357 W IB 2010051357W WO 2011121391 A1 WO2011121391 A1 WO 2011121391A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
polygonal plate
drill bit
disposed
bit according
Prior art date
Application number
PCT/IB2010/051357
Other languages
English (en)
Inventor
Ronald Bennett
Original Assignee
Norvic S.A.
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 Norvic S.A. filed Critical Norvic S.A.
Priority to PCT/IB2010/051357 priority Critical patent/WO2011121391A1/fr
Publication of WO2011121391A1 publication Critical patent/WO2011121391A1/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
    • E21B10/12—Roller bits with discs cutters

Definitions

  • the present invention relates to a drill bit for use in drilling a well bore, comprising a main drill body adapted to be rotated about a substantially vertically disposed axis of rotation and preferably having therein a duct extending longitudinally along said axis for supplying a drill fluid under pressure to the well bore, at least one, preferably three generally circular, rotatable cutting discs mounted on the outside of said main drill body at equally spaced locations, provided with cutting elements, each of said cutting discs having an axis of rotation disposed at an acute angle to the vertically disposed axis about which said main drill body rotates, and with the axis of rotation of each cutting disc being slightly offset laterally in a rearward direction from the vertically disposed axis of the main drill body, in relation to the direction of rotation of said main drill body.
  • US-A-5, 064, 007 proposes a high-wear cutting surface or hemispherical cutting elements of removing the central column located in the lower part of the drill body.
  • CH-A-689 948 describes polycrystalline teeth set in the base of the bit body which are shown pointing vertically downwards parallel to the axis of rotation of the bit that are clearly designed to shear the centre column from the top) , the emphasis in the description being that the main cutting discs enter the rock first at the base of the hole, protecting the polycrystalline teeth from the impact.
  • the aim of the present invention is to improve the above devices by attacking the centre column from the side instead of the top, thereby reducing to negligible the upward force on the bit that inhibits its downward progression in the hole, and causes it to wander.
  • the device according to the present invention is characterized in that it comprises a polygonal plate designed to be attached or set in the lowest part of said main drill body perpendicular to the vertically disposed axis and provided with at least one cutting insert disposed perpendicular to the polygonal plate and close to a corner of the polygonal plate and on the line passing by the corner apex and the center of the polygonal plate, in that each cutting insert presents a cutting face facing the center of the polygonal plate and provided with a polycrystalline layer.
  • the disposition of the p cutting insert or inserts away the center of the plate allows to attack and share the centre column from the side decreasing its diameter and making easier its destruction.
  • the cutting face plane is disposed at an angle ⁇ with respect to plane passing by the free edge of the cutting insert and parallel to polygonal plate. Said angle ⁇ is between 60° and 80°.
  • the cutting face plane is disposed at an angle of 30° with the direction of rotation of the drill bit.
  • Said polygonal plate is preferably a steel plate integral with the drill body or screwed thereon or attached thereon by any method of joining two metal surfaces .
  • the p cutting inserts are disposed in an annular disposition, or in two or more concentric annular dispositions and in this case the heights of the inserts disposed on a same line passing by the corner apex and the center of the polygonal plate increase from the center line to the apex or on a spiral line starting close to a corner and ending close to the center of the polygonal plate in this case the height of the cutting inserts increases from the center of the polygonal plate to the corner.
  • the outer cutting inserts reduce the diameter of the core allowing the inner cutting inserts to complete the reduction so that the core will disintegrate.
  • said polygonal plate has a central hole to coincide with the end of said duct for the drill fluid passage and it is preferably fitted with a wear resistant nozzle preferably made in tungsten carbide.
  • FIG 1 is a drawing of a disc bit from below showing one cutting insert.
  • Fig 2 is a drawing of the polygonal plate for attachment to the base of the bit, looking upwards from the bottom of the hole, the said plate being set with three equidistant cutting inserts and a centre vent with nozzle.
  • Fig 3 is a drawing as shown in Fig 2 with inserts disposed in two concentric rings.
  • Fig 4 is a drawing similar to figure 1, the inserts being disposed in a spiral.
  • Figure 5 is a side view of the figure 3 showing the relative heights of inserts.
  • Fig 6 is a disc bit into a well.
  • Figure 7 is a side view of an insert.
  • the rotary drilling device of the present invention is similar to the device shown in figure 1 of US-A- 5, 046, 007 and we will describe briefly only the main features common to both devices.
  • the rotary drilling device 10 comprises a main body member 12 fitted with standard male thread connector 16 at its uppermost portion, enabling it to be connected to a rotary drive system.
  • the power-applying shaft has a centrally disposed longitudinal hole to permit the flow of coolant therethrough, and the shaft is rotatable about a centerline or axis of rotation.
  • the body member 12 has a centrally located coolant duct located in alignment with a central hole, with duct opening into an orifice provided for the circulation of drilling fluid or air under pressure to the drilling area of three rotating discs 13, 14 and 15 mounted on the body member 12.
  • the discs 13, 14, 15 serve to create a generally circular hole 11 in the rock being penetrated.
  • the discs 13, 14, 15 are provided with cutting inserts 17, 18.
  • a polygonal surface 19 On the lower part of the main body 12 a polygonal surface 19, in the present case a triangular surface, perpendicular to the axis of rotation is provided.
  • the surface is preferably a steel plate integral with the drill body or screwed thereon or attached thereon by any method of joining two metal surfaces.
  • At least one cutting insert 20 is disposed close to a corner of the polygonal plate 19 and on the line passing by the corner apex and the center of the polygonal plate. The aim of this cutting insert or inserts 20 is to remove residual column or core of rock 30 (figure 6) that may result from non-breakage of the rock not directly reached by the cutting inserts of the discs 13, 14 and 15.
  • a triangular steel plate 19 is shown. He is provided with three cutting inserts 20 in annular disposition and lying on the lines passing by the corner apexes and the center of the polygonal plate.
  • the cutting inserts have a cutting face 32 (fig 7) disposed at an angle ⁇ with respect to plane passing by the free edge of the cutting insert and parallel to polygonal plate. The angle ⁇ is between 60° and 80°.
  • the cutting face 32 is provided with a polycrystalline layer such a diamond.
  • the cutting face 32 faces the center of the polygonal plate 19.
  • the cutting face plane according an embodiment is disposed at an angle of _+ 30° with the direction of rotation of the drill bit.
  • the steel plate 19 is provided with central hole 21 to coincide with the end of the duct for the drill fluid passage. Central hole 21 is fitted with a wear resistant nozzle preferably made in tungsten carbide.
  • the disposition of the cutting insert or inserts allows to attack and to shear the core from the side instead of the top as shown in the cited documents, thereby reducing to negligible the upward force on the drill bit .
  • Screwing the steel plate 19 onto the main body 12 allows to replace the steel plate and inserts 20 quickly when the inserts 20 become worn or damaged.
  • the steel plate 22 is provided with a smaller central hole 23 or the diameter of the drill bit is larger and it is possible to have cutting inserts 24 and 25 disposed in two annular dispositions.
  • the central hole 23 may be smaller when the rock is very hard as the penetration rate of the drill bit and therefore the rate of production of rock chippings will be less.
  • cutting inserts are in two or more annular dispositions the heights of the inserts disposed on a same line passing by the corner apex and the center of the polygonal plate increase from the center line to the apex allowing the cutting inserts to attack from the side at the same time the conical core.
  • FIG 5 a lateral view of the steel plate 22 is represented showing the cutting inserts 24, 25 relative heights .
  • the cutting inserts 27 are disposed on a spiral line, starting close to a corner and ending close to the center of the polygonal plate, on a steel plate 26.
  • a central hole 28 is provided.
  • the height of the cutting inserts 27 increases from the center of the polygonal plate to the corner.
  • a drill bit similar to this of figure 1 is represented inside a well drilled by this device. The drill bit is slightly drawn upwards to see the profile of the well 11 bottom. Indeed, the relative positions of the three discs 13, 14, 15 do not allow to cut a central part 30 of the well bottom as the lowest cutting inserts 17 of the three discs 13, 14, 15 are some centimeters away the vertically disposed axis of rotation.
  • the cutting inserts disposed on the polygonal plate allow shearing the central core 30 allowing the disc bit to continue to drill.
  • FIG 7 a side view of a cutting insert is shown.
  • the cutting insert comprise a body 31, usually of cylindrical shape, disposed onto the polygonal plate.
  • the upper end of the cutting insert comprises a inclined cutting face 32 provided with a polycrystalline layer, usually made in diamond.
  • the cutting face 32 faces the center of the polygonal plate. In some configurations the cutting insert is set in the polygonal plate so that only the cutting face 32 is exposed above the plate.

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

La présente invention porte sur un dispositif de forage rotatif (10) comprenant un élément de corps principal (12). L'élément de corps (12) a trois disques tournants (13, 14, 15) comportant des inserts de coupe (17, 18). Sur la partie inférieure du corps principal (12) est prévue une surface polygone (19) perpendiculaire à l'axe de rotation. La surface est, de préférence, une plaque en acier d'un seul tenant avec le corps de forage ou visée sur celui-ci ou fixée sur celui-ci par tout procédé d'assemblage de deux surfaces métalliques. Au moins un insert de coupe (20) est disposé à proximité d'un coin de la plaque polygonale (19) et sur la ligne passant par le sommet du coin et le centre de la plaque polygonale. Le but de cet insert de coupe ou de ces inserts de coupe (20) consiste à enlever une colonne résiduelle ou un fragment résiduel de roche qui peut résulter d'une non-rupture de la roche non directement atteinte par les inserts de coupe des disques (13, 14, 15).
PCT/IB2010/051357 2010-03-29 2010-03-29 Trépan WO2011121391A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2010/051357 WO2011121391A1 (fr) 2010-03-29 2010-03-29 Trépan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2010/051357 WO2011121391A1 (fr) 2010-03-29 2010-03-29 Trépan

Publications (1)

Publication Number Publication Date
WO2011121391A1 true WO2011121391A1 (fr) 2011-10-06

Family

ID=42782204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/051357 WO2011121391A1 (fr) 2010-03-29 2010-03-29 Trépan

Country Status (1)

Country Link
WO (1) WO2011121391A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046007A (en) 1989-06-07 1991-09-03 Accutek Industries, Inc. Motor vehicle data collection device
US5064007A (en) 1988-11-23 1991-11-12 Norvic S.A. Three disc drill bit
US5147000A (en) 1990-06-19 1992-09-15 Norvic S.A. Disc drill bit
DE19521447A1 (de) * 1995-06-16 1996-12-19 Tanke Oil Field Dev Gmbh Rollenmeißel
CH689948A5 (fr) 1994-03-24 2000-02-15 Norvic Sa Dispositif de forage d'un puits.
US20070062736A1 (en) * 2005-09-21 2007-03-22 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5064007A (en) 1988-11-23 1991-11-12 Norvic S.A. Three disc drill bit
US5046007A (en) 1989-06-07 1991-09-03 Accutek Industries, Inc. Motor vehicle data collection device
US5147000A (en) 1990-06-19 1992-09-15 Norvic S.A. Disc drill bit
EP0534037A1 (fr) * 1991-09-27 1993-03-31 Norvic S.A. Outil de forage à disques coupants
CH689948A5 (fr) 1994-03-24 2000-02-15 Norvic Sa Dispositif de forage d'un puits.
DE19521447A1 (de) * 1995-06-16 1996-12-19 Tanke Oil Field Dev Gmbh Rollenmeißel
US20070062736A1 (en) * 2005-09-21 2007-03-22 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement

Similar Documents

Publication Publication Date Title
US6311793B1 (en) Rock bit nozzle and retainer assembly
EP0707130B1 (fr) Trépan de forage rotatif
US5407022A (en) Free cutting gage insert with relief angle
US4610316A (en) Free flow stabilizer
CN104956026B (zh) 具有改善的切削件侧倾角布置方式的钻地工具
WO2006130332A1 (fr) Ajutage dirigeable pour trepans
US20180245620A1 (en) Screw capable of easily drilling holes and dregs removing
EP2990589B1 (fr) Trépan à face de coupe en retrait
EP2910727A1 (fr) Tête de fraisage de fracturation
US4527644A (en) Drilling bit
US20130180783A1 (en) Turbine Driven Reaming Bit with Stability and Cutting Efficiency Features
US8978787B2 (en) Turbine driven reaming bit with blades and cutting structure extending into concave nose
WO2014136727A1 (fr) Trépan de creusement
US20060219442A1 (en) Earth-boring bit with shear cutting elements
US9080390B2 (en) Turbine driven reaming bit with profile limiting torque fluctuation
US7913778B2 (en) Rock bit with hydraulic configuration
WO2011121391A1 (fr) Trépan
WO2014149132A2 (fr) Trépan de forage avec lames remplaçables, impulsion de fluide et collision de fluide
US7654345B1 (en) Wear resistant sub assembly
US20050109546A1 (en) Flat and bevel chipbreaker insert
WO2014149131A2 (fr) Trépan de forage à impulsion de fluide et à collision de fluide
US20130341101A1 (en) Feature to eliminate shale packing/shale evacuation channel
GB2383062A (en) Earth-boring bit and nozzle
GB2461429A (en) Rock bit with hydraulics configuration
US10072463B2 (en) Anti-balling drill bit positioned relative to fixed blades presenting fixed cutting inserts

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10713006

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 16.01.2013)

122 Ep: pct application non-entry in european phase

Ref document number: 10713006

Country of ref document: EP

Kind code of ref document: A1