EP0176180A1 - Outil pour élargir des trous de forage - Google Patents

Outil pour élargir des trous de forage Download PDF

Info

Publication number
EP0176180A1
EP0176180A1 EP85305111A EP85305111A EP0176180A1 EP 0176180 A1 EP0176180 A1 EP 0176180A1 EP 85305111 A EP85305111 A EP 85305111A EP 85305111 A EP85305111 A EP 85305111A EP 0176180 A1 EP0176180 A1 EP 0176180A1
Authority
EP
European Patent Office
Prior art keywords
housing
tool
aperture
cutting edges
wall
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
EP85305111A
Other languages
German (de)
English (en)
Other versions
EP0176180B1 (fr
Inventor
Neil Andrew Abercrombie Simpson
Alan Martyn Eddison
Ian Alexander Millar
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.)
Diamant Boart NV SA
Original Assignee
Diamant Boart NV SA
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
Priority claimed from US06/634,956 external-priority patent/US4589504A/en
Priority claimed from GB858510911A external-priority patent/GB8510911D0/en
Application filed by Diamant Boart NV SA filed Critical Diamant Boart NV SA
Publication of EP0176180A1 publication Critical patent/EP0176180A1/fr
Application granted granted Critical
Publication of EP0176180B1 publication Critical patent/EP0176180B1/fr
Expired legal-status Critical Current

Links

Images

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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • This invention relates to a tool for enlarging well bores.
  • a second method of hole enlarging would be to use a conventional hole enlarger. In this case the hydraulics though improved are not as efficient as they could be.
  • the hole-opening tool is stabilised by having its lower diameter the same as the pilot hole so as to bear against the pilot hole in use, but the pilot hole tends to be non-uniform and rough-walled and severe vibration of the tool can result.
  • a tool for enlarging well bores comprising
  • a plurality of cutters are arranged around the housing.
  • a plurality of apertures are provided for the passageway.
  • the aperture is preferably in the form of a nozzle for providing a jet of fluid from the-passageway laterally outwardly against the well bore.
  • localised pressure is exerted on the borehole wall in the area of cutting, increasing locally the pore pressure.
  • the provision of the aperture at the same level as the cutting edge maximises this effect and also ensures that cuttings are immediately caught in the flow of fluid, keeping the cutting edge clear of debris.
  • a tool for enlarging well bores comprising
  • a plurality of cutters are provided at spaced intervals around the housing and the diameter of the housing above the cutter is at its maximum substantially the same as the diameter of the enlarged well bore produced by the cutters on rotation of the housing.
  • the tool of this embodiment of the invention has a housing generally indicated at 1 of which top and bottom cylindrical sections 2, 3 of 241 mm outside diameter and a middle cylindrical section 4 is of 444 mm outside diameter at its upper portion 4A.
  • the housing 1 has an overall length of 2121 mm.
  • a lower portion 4B of the middle section is of reduced outside diameter and has three equispaced slots 5 cut into it, the slots receiving cutters 6 having cutting edges 6A, 6B and 6C which have synthetic polycrystalline Compax, Stratax or Diapax diamond wafers 7 along them to provide hardness and wear resistance.
  • the outermost cutting edges 6C describe a circle having a diameter of 444 mm, i.e. the same as the diameter of the upper portion 4A of the housing middle section.
  • Each cutter 6 is secured within its slot 5 by means of two screwed pins 12 passing through the cutter 6 and screwing into the portion 4B of the housing 1 (see Fig. 3) which forces the cutter 6 against a side face of the slot 5, thereby preventing vibration of the cutter 6 in the slot.
  • Each screwed pin is prevented from loosening by means of an eccentric locking disc 12A.
  • a through bore 8 extends axially through the housing and apertures 9, 10 open from the bore 8 radially outwardly into the slots 5 between the forks 11 of each cutter 6.
  • the apertures 9, 10 are disposed at the same level on the housing 1 as the cutting edges 6C, 6A respectively.
  • the apertures 10 are directed along the cutting edges 6A.
  • Nozzles 15 are disposed within the sleeves 14 and sealed against their inner faces to provide a reducing cross- sectional area for the apertures 9, 10 as they emerge from the bore 8.
  • the nozzles 15 are removable and interchangeable, and their total area at their outer ends is 0.9 c m 2 .
  • the tool of this embodiment of the invention is screwed at its upper and lower ends into a drill string, so that the bore 8 communicates with fluid passageways above and below it.
  • the string carries at its lower end a drill bit (not shown) which forms a pilot hole 16 (Fig. 2) in the sea bed on rotation of the string, or a bullnose which will follow an existing pilot hole.
  • Drilling fluid is pumped through the drill string and passes through the bore 8 to the drill bit and, being under pressure, is forced in part through the nozzles 15, emerging from them at a velocity of 60-100 metres per sec.
  • the pressure drop across the nozzles 15 is around 70 kg per cm 2 .
  • the rate of fluid flow through the nozzles is 5455 litres per minute.
  • the fluid As the fluid is jetted through the nozzles 15 it forces debris away from the cutting edges 6A, 6B, 6C, with direct action along the edge 6A. Cuttings are then entrained in the upward flow of fluid from the drill bit, which is joined by the fluid from the nozzles 15. Further, the high velocity of the fluid from the nozzles 15 against the wall of the well bore assists the cutting action of the cutters by causing initial weakening and breakage of the wall; as the fluid flow from the nozzles is lateral of the well bore it acts directly against the bore wall generally in the plane of rock strata, thus producing a disruptive effect on the wall. The localised high pressure created by the fluid from the nozzles also reduces the "chip hold-down" effect of a substantially downwardly-directed jet, thus reducing wear on the cutting edges 6A, 6B, 6C.
  • the pilot hole 16 is opened to a wider diameter by the cutters 6, providing a drill hole 17 (Fig. 2) of about 444 mm diameter.
  • a drill hole 17 (Fig. 2) of about 444 mm diameter.
  • the upper portion 4A of the housing's middle section bears against the wall of the drill hole 17, providing stabilisation for the tool.
  • the face of the newly-formed drill hole 17 is smoother and has more integrity than that of the pilot hole 16, and therefore provides better stabilisation for the tool than conventional arrangements in which the stabilisation is effected against the pilot hole.
  • chip hold down is affected greatly by over-balance and if the lateral jetting is causing formation pressure to be increased to a level above the hydrostatic pressure of the mud column, then a substantial increase in rate of penetration will certainly take place.

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)
  • Walking Sticks, Umbrellas, And Fans (AREA)
EP85305111A 1984-07-27 1985-07-18 Outil pour élargir des trous de forage Expired EP0176180B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US634956 1984-07-27
US06/634,956 US4589504A (en) 1984-07-27 1984-07-27 Well bore enlarger
GB8510911 1985-04-30
GB858510911A GB8510911D0 (en) 1985-04-30 1985-04-30 Hole opener

Publications (2)

Publication Number Publication Date
EP0176180A1 true EP0176180A1 (fr) 1986-04-02
EP0176180B1 EP0176180B1 (fr) 1988-11-30

Family

ID=26289185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305111A Expired EP0176180B1 (fr) 1984-07-27 1985-07-18 Outil pour élargir des trous de forage

Country Status (3)

Country Link
EP (1) EP0176180B1 (fr)
DE (1) DE3566564D1 (fr)
NO (1) NO169609C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257944A3 (fr) * 1986-08-21 1989-05-24 Smith International (North Sea) Limited Outil de fraisage
DE4012222A1 (de) * 1990-04-14 1991-10-17 Gerhard Bihler Tiefbohrwerkzeug
WO1993025794A1 (fr) * 1992-06-05 1993-12-23 Panther Oil Tools (Uk) Limited Outils de forage
GB2389132A (en) * 2002-05-28 2003-12-03 Smith International Fixed blade symmetrical hole opener

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506342C2 (sv) * 1996-04-09 1997-12-08 Sandvik Ab Upprymningsverktyg för bergborrning jämte tillsatsdel härför

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028910A (en) * 1934-02-03 1936-01-28 John W Macclatchie Reamer
US2140417A (en) * 1937-12-28 1938-12-13 Conklin Ancil Brooks Core taker for rotary drills
US2149798A (en) * 1936-06-27 1939-03-07 Arthur E Krick Well-drilling bit
US2249732A (en) * 1939-09-22 1941-07-22 Paul F Green Off center reamer
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
GB788104A (en) * 1954-10-01 1957-12-23 Modern Hardmetals Ltd Improvements in or relating to rock drilling bits
US3237705A (en) * 1963-11-13 1966-03-01 Williams Joseph W Reamer for enlarging and straightening bore holes
US3324957A (en) * 1963-09-24 1967-06-13 Gulf Research Development Co Hydraulic jet method of drilling a well through hard formations
US3908771A (en) * 1974-03-01 1975-09-30 Wylie P Garrett Drill collar incorporating device for jetting drilling fluid transversely into bore hole
US4445580A (en) * 1979-06-19 1984-05-01 Syndrill Carbide Diamond Company Deep hole rock drill bit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028910A (en) * 1934-02-03 1936-01-28 John W Macclatchie Reamer
US2149798A (en) * 1936-06-27 1939-03-07 Arthur E Krick Well-drilling bit
US2140417A (en) * 1937-12-28 1938-12-13 Conklin Ancil Brooks Core taker for rotary drills
US2249732A (en) * 1939-09-22 1941-07-22 Paul F Green Off center reamer
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
GB788104A (en) * 1954-10-01 1957-12-23 Modern Hardmetals Ltd Improvements in or relating to rock drilling bits
US3324957A (en) * 1963-09-24 1967-06-13 Gulf Research Development Co Hydraulic jet method of drilling a well through hard formations
US3237705A (en) * 1963-11-13 1966-03-01 Williams Joseph W Reamer for enlarging and straightening bore holes
US3908771A (en) * 1974-03-01 1975-09-30 Wylie P Garrett Drill collar incorporating device for jetting drilling fluid transversely into bore hole
US4445580A (en) * 1979-06-19 1984-05-01 Syndrill Carbide Diamond Company Deep hole rock drill bit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257944A3 (fr) * 1986-08-21 1989-05-24 Smith International (North Sea) Limited Outil de fraisage
DE4012222A1 (de) * 1990-04-14 1991-10-17 Gerhard Bihler Tiefbohrwerkzeug
WO1993025794A1 (fr) * 1992-06-05 1993-12-23 Panther Oil Tools (Uk) Limited Outils de forage
GB2389132A (en) * 2002-05-28 2003-12-03 Smith International Fixed blade symmetrical hole opener
US6742607B2 (en) 2002-05-28 2004-06-01 Smith International, Inc. Fixed blade fixed cutter hole opener
GB2389132B (en) * 2002-05-28 2005-04-20 Smith International Fixed blade fixed cutter hole opener

Also Published As

Publication number Publication date
EP0176180B1 (fr) 1988-11-30
DE3566564D1 (en) 1989-01-05
NO169609C (no) 1992-07-15
NO169609B (no) 1992-04-06
NO852975L (no) 1986-01-28

Similar Documents

Publication Publication Date Title
US4640374A (en) Rotary drill bit
US4408671A (en) Roller cone drill bit
US5775443A (en) Jet pump drilling apparatus and method
US4618010A (en) Hole opener
US6338390B1 (en) Method and apparatus for drilling a subterranean formation employing drill bit oscillation
US3727704A (en) Diamond drill bit
CA1202955A (fr) Tete de foration rotative a decharge de fluide sous pression
US5836404A (en) Drill bits with enhanced hydraulic flow characteristics
GB2385618A (en) Device for drilling a subterranean formation with variable depth of cut
CA2008567A1 (fr) Trepan bimodal
CA1263109A (fr) Elargisseur de trou a organes de coupe integres
NO810521L (no) Bergborkrone for boring av dype hull.
US6926099B2 (en) Drill out bi-center bit and method for using same
US7886851B2 (en) Drill bit nozzle
US3433331A (en) Diamond drill bit
US3199617A (en) Drilling bit
EP0058061A2 (fr) Outil de forage pour formation souterraine
US4911729A (en) Overburden eliminator rock drill bit
EP0176180A1 (fr) Outil pour élargir des trous de forage
US7373994B2 (en) Self cleaning coring bit
US3283837A (en) Drill bit
US5740873A (en) Rotary bit with gageless waist
US3548960A (en) Drill bit having rotating stand-off elements
US20100276206A1 (en) Rotary Drill Bit
US3552505A (en) Core bit and core crusher apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB NL

17P Request for examination filed

Effective date: 19860818

17Q First examination report despatched

Effective date: 19871006

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL

REF Corresponds to:

Ref document number: 3566564

Country of ref document: DE

Date of ref document: 19890105

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910731

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000731

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030612

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030619

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030731

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040718

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050201

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040718

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19890731