EP0225082A3 - Improvements in or relating to rotary drill bits - Google Patents

Improvements in or relating to rotary drill bits

Info

Publication number
EP0225082A3
EP0225082A3 EP86308791A EP86308791A EP0225082A3 EP 0225082 A3 EP0225082 A3 EP 0225082A3 EP 86308791 A EP86308791 A EP 86308791A EP 86308791 A EP86308791 A EP 86308791A EP 0225082 A3 EP0225082 A3 EP 0225082A3
Authority
EP
European Patent Office
Prior art keywords
bit
nozzles
nozzle
bit body
drilling fluid
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.)
Withdrawn
Application number
EP86308791A
Other languages
German (de)
French (fr)
Other versions
EP0225082A2 (en
Inventor
John Fuller
Peter John Comber
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.)
NL Petroleum Products Ltd
Original Assignee
NL Petroleum Products Ltd
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 NL Petroleum Products Ltd filed Critical NL Petroleum Products Ltd
Publication of EP0225082A2 publication Critical patent/EP0225082A2/en
Publication of EP0225082A3 publication Critical patent/EP0225082A3/en
Withdrawn legal-status Critical Current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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades

Abstract

A rotary drill bit comprises a bit body (10) having a leading face (11) and a gauge region (12), a plurality of blades (13) extending across the leading face (11) of the bit body (10), a plurality of cutting elements (8) mounted along each blade, an exit channel (18) in the gauge region (12) of the bit body (10) between each pair of adjacent blades (13), a plurality of nozzles (19a,19b,19c,19d) in the leading face (11) of the bit, each nozzle having a central axis (20) which also forms the central axis of the jet of drilling fluid emerging from the nozzle, and a passage (6) in the bit body (10) for supplying drilling fluid to said openings (19a-19d). At least one nozzle is located between each pair of adjacent blades (13), and the nozzles are inclined at different angles, or are otherwise differently located, so that, in use, the central axes of nozzles between different pairs of adjacent blades (13) intersect the surface of the formation (21) being drilled at different distances from the axis of rotation of the bit, so that the jets of drilling fluid emerging from the nozzles, between them, sweep over the whole of the surface of the formation as the bit rotates.
EP86308791A 1985-11-16 1986-11-12 Improvements in or relating to rotary drill bits Withdrawn EP0225082A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8528299 1985-11-16
GB858528299A GB8528299D0 (en) 1985-11-16 1985-11-16 Rotary drill bits

Publications (2)

Publication Number Publication Date
EP0225082A2 EP0225082A2 (en) 1987-06-10
EP0225082A3 true EP0225082A3 (en) 1988-07-27

Family

ID=10588345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86308791A Withdrawn EP0225082A3 (en) 1985-11-16 1986-11-12 Improvements in or relating to rotary drill bits

Country Status (2)

Country Link
EP (1) EP0225082A3 (en)
GB (2) GB8528299D0 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4981184A (en) * 1988-11-21 1991-01-01 Smith International, Inc. Diamond drag bit for soft formations
US5314033A (en) * 1992-02-18 1994-05-24 Baker Hughes Incorporated Drill bit having combined positive and negative or neutral rake cutters
US5363932A (en) * 1993-05-10 1994-11-15 Smith International, Inc. PDC drag bit with improved hydraulics
US5794725A (en) * 1996-04-12 1998-08-18 Baker Hughes Incorporated Drill bits with enhanced hydraulic flow characteristics
FR2756002B1 (en) * 1996-11-20 1999-04-02 Total Sa BLADE DRILLING TOOL WITH RESERVE SIZES AND CUT-OUT DRAIN CHANNELS
US6302223B1 (en) 1999-10-06 2001-10-16 Baker Hughes Incorporated Rotary drag bit with enhanced hydraulic and stabilization characteristics
AU2011318230A1 (en) * 2010-10-19 2013-05-23 Drilling Tools Australia Pty Ltd A drill bit
CN113404439A (en) * 2021-06-11 2021-09-17 东北石油大学 Particle percussion drill bit
CN117046890B (en) * 2023-09-11 2024-02-13 滨州市生态环境服务中心 Method for in-situ remediation of phosphorus contaminated soil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112803A (en) * 1962-01-02 1963-12-03 Jersey Prod Res Co Diamond drill bit
EP0043609A1 (en) * 1980-07-04 1982-01-13 Shell Internationale Researchmaatschappij B.V. Rotary bit with jet nozzles
US4499958A (en) * 1983-04-29 1985-02-19 Strata Bit Corporation Drag blade bit with diamond cutting elements
EP0140676A2 (en) * 1983-10-29 1985-05-08 Reed Tool Company Limited Improvements in or relating to rotary drill bits
EP0146252A2 (en) * 1983-11-08 1985-06-26 Flow Industries Inc. Leak-proof, high pressure, high velocity, fluid jet cutting nozzle assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098363A (en) * 1977-04-25 1978-07-04 Christensen, Inc. Diamond drilling bit for soft and medium hard formations
FR2566833B1 (en) * 1984-06-27 1986-11-14 Inst Francais Du Petrole METHOD AND IMPROVEMENT IN DRILLING TOOLS COMPRISING WATER PASSAGES ENABLING A HIGH EFFICIENCY IN CLEANING THE SIZE FRONT
GB8418481D0 (en) * 1984-07-19 1984-08-22 Nl Petroleum Prod Rotary drill bits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112803A (en) * 1962-01-02 1963-12-03 Jersey Prod Res Co Diamond drill bit
EP0043609A1 (en) * 1980-07-04 1982-01-13 Shell Internationale Researchmaatschappij B.V. Rotary bit with jet nozzles
US4499958A (en) * 1983-04-29 1985-02-19 Strata Bit Corporation Drag blade bit with diamond cutting elements
EP0140676A2 (en) * 1983-10-29 1985-05-08 Reed Tool Company Limited Improvements in or relating to rotary drill bits
EP0146252A2 (en) * 1983-11-08 1985-06-26 Flow Industries Inc. Leak-proof, high pressure, high velocity, fluid jet cutting nozzle assembly

Also Published As

Publication number Publication date
GB8627050D0 (en) 1986-12-10
EP0225082A2 (en) 1987-06-10
GB2183693A (en) 1987-06-10
GB8528299D0 (en) 1985-12-18

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Legal Events

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Inventor name: FULLER, JOHN

Inventor name: COMBER, PETER JOHN