EP0248615A2 - Bohrvorrichtung - Google Patents

Bohrvorrichtung Download PDF

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Publication number
EP0248615A2
EP0248615A2 EP87304811A EP87304811A EP0248615A2 EP 0248615 A2 EP0248615 A2 EP 0248615A2 EP 87304811 A EP87304811 A EP 87304811A EP 87304811 A EP87304811 A EP 87304811A EP 0248615 A2 EP0248615 A2 EP 0248615A2
Authority
EP
European Patent Office
Prior art keywords
core
barrel
coated
fluoropolymer
core barrel
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Withdrawn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
EP87304811A
Other languages
English (en)
French (fr)
Other versions
EP0248615A3 (de
Inventor
Diamond Products Limited Oreco
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.)
ORECO DIAMOND PRODUCTS Ltd
Original Assignee
Individual
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 GB868613582A external-priority patent/GB8613582D0/en
Application filed by Individual filed Critical Individual
Publication of EP0248615A2 publication Critical patent/EP0248615A2/de
Publication of EP0248615A3 publication Critical patent/EP0248615A3/de
Withdrawn legal-status Critical Current

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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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/10—Formed core retaining or severing means
    • E21B25/12—Formed core retaining or severing means of the sliding wedge type
    • 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
    • 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
    • E21B10/02—Core bits
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors

Definitions

  • This invention relates to improvements in drilling apparatus.
  • Drilling apparatus is used in a broad sense to cover equipment such as drilling and coring bits, stabilisers, core barrels including inner and outer barrels, bearings and bearing housings, core catchers, core catcher and core barrel substitutes (subs), core barrel extension pieces, junction pieces, drill collars, down hole motors, reamers and substitutes, drill pipe and oil well piping and tubing generally, including oil well production tubing.
  • equipment such as drilling and coring bits, stabilisers, core barrels including inner and outer barrels, bearings and bearing housings, core catchers, core catcher and core barrel substitutes (subs), core barrel extension pieces, junction pieces, drill collars, down hole motors, reamers and substitutes, drill pipe and oil well piping and tubing generally, including oil well production tubing.
  • drilling apparatus is coated with a layer of a fluoropolymer such as polytetrafluoroethylene, commonly known as PTFE.
  • a fluoropolymer such as polytetrafluoroethylene, commonly known as PTFE.
  • the core as it is cut enters the inner barrel through the core catcher.
  • difficulty may be experienced by the rock core jamming in the mouth of the inner core barrel or core catcher sub or in the core catcher due to the friction between the rock core and the steel inner tube or core catcher or due to the inner core barrel rotating when in contact with the core.
  • high pressure may develop in the circulating fluid and lack of penetration or regrinding (or re-cutting) of the rock core will occur.
  • the core barrel must then be removed from the drill hole prematurely and the core removed from the barrel before coring can be recommenced.
  • the coefficient of friction between the rock core and the steel inner barrel is reduced thus allowing the core to freely enter the inner barrel and to be removed without "freezing".
  • the outer surface of the inner barrel and the inner surface of the outer barrel are coated with a fluoropolymer.
  • the reduced friction from the coated surface allows higher viscosity fluids and higher volumes of fluid to be used without resulting in the inner barrel rotating.
  • the coating of fluoropolymer is a PTFE coating and it is preferably in the form of either a single coat of l8 - 20 microns thickness or two coats each of 5 - l2 microns in thickness.
  • Other parts may be coated such as a drill bit carrier or parts of the drill bit itself, or the core catcher sub and other tubes, pipes, collars, sleeves, etc. which are used in the drilling equipment and are liable to come into contact either with the core or with the drilling medium.
  • the apparatus shown in the drawing comprises an outer core barrel l0 and an inner core barrel ll which are normally in sections. One complete section is shown and the joints l2 between each section and the next upper section is also shown.
  • a core catcher sub l3 At the lower end of the outer core barrel there is attached a core catcher sub l3. At the lower end of the inner barrel ll is attached an inner barrel breaker sub l4 and below that a core catcher l5. A core bit l6 is attached to the lower end of the outer barrel.
  • outer surface 2l of outer barrel l0 may also be coated as may various other parts such as the outer surface 22 of the drill bit, the inner surface 23 of the core catcher and the inner surface 24 of the inner barrel breaker sub.
  • any surface may be coated which is liable to be contacted either by a core or by drilling medium.
  • this invention it is possible to remove cores from a core barrel with minimum effort and to avoid freezing of the core in the barrel. It is also possible to avoid hydraulic locks and mechanical locks between the rotating outer core barrel and the stationary inner core barrel and thus avoid the core jamming and the necessity of having to remove the whole string in order to free such core jams.
  • Oil well production tubing is susceptible to a build-up of salts which stick particularly to the interior surface of the production tubing.
  • the tubing is therefore coated, in accordance with the invention, on its interior surface at least, with a layer of PTFE which substantially reduces the build-up of salts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP87304811A 1986-06-04 1987-06-01 Bohrvorrichtung Withdrawn EP0248615A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8613582 1986-06-04
GB868613582A GB8613582D0 (en) 1985-06-19 1986-06-04 Zrb2-containing sintered cermet drilling apparatus

Publications (2)

Publication Number Publication Date
EP0248615A2 true EP0248615A2 (de) 1987-12-09
EP0248615A3 EP0248615A3 (de) 1988-11-30

Family

ID=10598932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304811A Withdrawn EP0248615A3 (de) 1986-06-04 1987-06-01 Bohrvorrichtung

Country Status (1)

Country Link
EP (1) EP0248615A3 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991019075A3 (fr) * 1990-05-31 1992-01-09 Diamant Boart Stratabit Sa Carottier double pour forage devie
EP0508329A3 (en) * 1991-04-04 1993-02-03 Baker-Hughes Incorporated Inner tube stabilizer for a corebarrel
BE1015000A5 (fr) * 2000-07-21 2004-08-03 Baker Hughes Inc Trepan tournant et son procede de realisation.
EP1627128A4 (de) * 2003-05-07 2006-05-24 Extreme Machining Australia Pt Stabilisierungsband für eine rollenanordnung
WO2008138957A3 (en) * 2007-05-15 2009-01-15 Shell Int Research System for drilling a wellbore
US7530409B2 (en) 2002-11-07 2009-05-12 Extreme Machining Australia Pty Ltd. Rotary roller reamer
CN102943642A (zh) * 2012-12-08 2013-02-27 吉林大学 不提钻孔底冷冻绳索取心钻具及取心方法
EP2900899A4 (de) * 2012-09-25 2016-05-11 Ct Tech Pty Ltd Kernhebeanordnung
CN107829691A (zh) * 2017-09-25 2018-03-23 北京探矿工程研究所 一种内涂层岩心管
US20190264521A1 (en) * 2016-03-03 2019-08-29 Halliburton Energy Services, Inc. Inner barrel shear zone for a coring tool
US10767431B2 (en) 2016-03-03 2020-09-08 Halliburton Energy Services, Inc. Inner barrel crimping connection for a coring tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD123550B (de) *
US3990751A (en) * 1975-08-13 1976-11-09 Reed Tool Company Drill bit
SU941542A1 (ru) * 1980-03-17 1982-07-07 Всесоюзный Научно-Исследовательский И Проектный Институт По Нефтепромысловой Химии "Внипинефтепромхим" Уплотнительный элемент пакера
US4365678A (en) * 1980-11-28 1982-12-28 Mobil Oil Corporation Tubular drill string member with contoured circumferential surface
BE886911A (fr) * 1980-12-30 1981-04-16 Diamant Boart Sa Methode de recuperation et manutention de carottes de sondage, et tube prevu a cet effet.
US4468056A (en) * 1981-10-05 1984-08-28 The B. F. Goodrich Company Swivel
DE3503494C2 (de) * 1985-01-31 1986-11-27 Mannesmann AG, 4000 Düsseldorf Ölfeldrohr

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004330A3 (fr) * 1990-05-31 1992-11-03 Diamant Boart Stratabit Sa Carottier double pour forage devie.
WO1991019075A3 (fr) * 1990-05-31 1992-01-09 Diamant Boart Stratabit Sa Carottier double pour forage devie
EP0508329A3 (en) * 1991-04-04 1993-02-03 Baker-Hughes Incorporated Inner tube stabilizer for a corebarrel
BE1015000A5 (fr) * 2000-07-21 2004-08-03 Baker Hughes Inc Trepan tournant et son procede de realisation.
US7530409B2 (en) 2002-11-07 2009-05-12 Extreme Machining Australia Pty Ltd. Rotary roller reamer
US7793715B2 (en) 2002-11-07 2010-09-14 Extreme Machining Australia Pty Ltd. Rotary roller reamer
EP1627128A4 (de) * 2003-05-07 2006-05-24 Extreme Machining Australia Pt Stabilisierungsband für eine rollenanordnung
GB2461471A (en) * 2007-05-15 2010-01-06 Shell Int Research System for drilling a wellbore
WO2008138957A3 (en) * 2007-05-15 2009-01-15 Shell Int Research System for drilling a wellbore
GB2461471B (en) * 2007-05-15 2012-02-15 Shell Int Research System for drilling a wellbore
EP2900899A4 (de) * 2012-09-25 2016-05-11 Ct Tech Pty Ltd Kernhebeanordnung
CN102943642A (zh) * 2012-12-08 2013-02-27 吉林大学 不提钻孔底冷冻绳索取心钻具及取心方法
CN102943642B (zh) * 2012-12-08 2015-04-01 吉林大学 不提钻孔底冷冻绳索取心钻具及取心方法
US20190264521A1 (en) * 2016-03-03 2019-08-29 Halliburton Energy Services, Inc. Inner barrel shear zone for a coring tool
US10767431B2 (en) 2016-03-03 2020-09-08 Halliburton Energy Services, Inc. Inner barrel crimping connection for a coring tool
US10941626B2 (en) * 2016-03-03 2021-03-09 Halliburton Energy Services, Inc. Inner barrel shear zone for a coring tool
CN107829691A (zh) * 2017-09-25 2018-03-23 北京探矿工程研究所 一种内涂层岩心管

Also Published As

Publication number Publication date
EP0248615A3 (de) 1988-11-30

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