WO2001063087A1 - Nettoyage de forage - Google Patents

Nettoyage de forage Download PDF

Info

Publication number
WO2001063087A1
WO2001063087A1 PCT/GB2001/000800 GB0100800W WO0163087A1 WO 2001063087 A1 WO2001063087 A1 WO 2001063087A1 GB 0100800 W GB0100800 W GB 0100800W WO 0163087 A1 WO0163087 A1 WO 0163087A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
bore
tne
cleaning apparatus
fluid
Prior art date
Application number
PCT/GB2001/000800
Other languages
English (en)
Inventor
Alan Martyn Eddison
Original Assignee
Andergauge Limited
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 GB0004251A external-priority patent/GB0004251D0/en
Priority claimed from GB0010376A external-priority patent/GB0010376D0/en
Application filed by Andergauge Limited filed Critical Andergauge Limited
Priority to AU2001233961A priority Critical patent/AU2001233961A1/en
Publication of WO2001063087A1 publication Critical patent/WO2001063087A1/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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • 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
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/02—Scrapers specially adapted therefor
    • E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
    • E21B37/045—Free-piston scrapers

Definitions

  • This invention relates to a bore cleaning method, and m particular to a method of cleaning a bore drilled to access a subsurface hydrocarbon-bearing formation.
  • bores are drilled from surface to access subsurface hydrocarbon-bearing formations .
  • drilling fluid known as "mud”
  • mud drilling fluid
  • the drilled bores are then lined with metal tubing, known as casing or liner, the casing being cemented in the bore by injecting cement slurry between the casing and the bore wall.
  • the annulus between the production tubing and the casing may be filled with a fluid such as D ⁇ ne and w ⁇ l_ accommodate seals, known as packers, and possibly other tools and devices, between the tubing and the casing.
  • a fluid such as D ⁇ ne and w ⁇ l_ accommodate seals, known as packers, and possibly other tools and devices, between the tubing and the casing.
  • the circulation of drilling mud during the drilling operation, and ⁇ he circulation of cement slurry during casing cementing operations results m solid material gathering m the bore, and it is desirable that this solid material _s removed from the ⁇ ore before production commences; the material ma ⁇ settle on top of packers and other tools and devices m the annulus between the production tubing and the casing, creating difficulties in subsequent workover or repair operations.
  • the bore, and m particular the bore annulus may be cleaned by circulating "clean" fluid through the bore, however this is time consuming and often of limited effectiveness; particularly in deviated bores, solid material tends to collect on the low side of the bore, and may not be dislodged or entrained by tne circulated cleaning fluid.
  • a oore cleaning method comprising the steps of: passing fluid through a bore annulus externally of a first tube, the first tube defining a non-circular outer profile; and rotating the tune such that the radial extent of the annulus varies with rotation of the tube.
  • the method further comprises the step of coupling adjacent sections of tube to ⁇ ether such that tne outer profiles of tne adjacent sections are not axiallv continuous along tne lengtn of the tube .
  • the method may farther comprise tne step of coupling adjacent sections of tube together such that the outer profiles of the adjacent sections centralise the tube m the bore.
  • a oore cleaning method comprising the steps: passing fluid through a bore annulus externally of a first tube; offsetting at _east a portion of the tube relative to the bore axis; and rotating the tube such that the radial extent of the annulus varies with rotation of the tube.
  • the variation m the radial extent of the annulus creates turbulence and agitation in the fluid m the annulus, thus facilitating the entramment of solids in the fluid, hicn solids may be drill cuttings, cement particles, or other debris.
  • solids may be drill cuttings, cement particles, or other debris.
  • the rotation of the offset tube produces a sweeping motion m the fluid, tending to dislodge and facilitate entramment of solids lying in the annulus.
  • the tube is suDstantially cylindrical and the tube axis is offset from the core axis.
  • the offset may be provided by mounting at least one offsetting member, such as a centraliser or sleeve, on the tube.
  • the centraliser may rotate with tne tube, that is oe fixed to the tube ana rotate relative to the bore.
  • the centraliser may be rotatable relative to the tube, such that the centraliser will tend not to rotate m the bore. This ma ⁇ be achieved by providing a bearing, possibly an offset oearmg, between the tube ana tne centraliser.
  • the tube may define a non-circular outer profile, for example the tube may be oval or square, or the tuoe wall may carry a longitudinally extending rib, extension, or the like.
  • the outer profiles of adjacent sections of such a tuoe are not continuous along the length of the tube, but rather are arranged to centralise the tube m the bore.
  • the orientation of adjacent sections of oval pipe vary by 90° such that the tube axis remains substantially central as the tube rotates.
  • the fluid will typically be passed down from surface through the tuoe, ana then return to tne surface via tne annulus.
  • the fluid may be a cleaning fluid, typically a brine, or may be drilling fluid.
  • the tube may form part of a tubing string, and the tubing string may be offset along some or all of its length .
  • tuoe nay be completion or production tubing.
  • tne tube may be drill pipe or the like.
  • the bore may be an open hole, or may be lined witn a larger diameter second tube such as casing or liner.
  • the first tuoe may have been ran into the bore with the second tuoe, or may be run into the bore subsequent to the second tube .
  • bore cleaning apparatus comprising: a first tube for location m a bore; means for offsetting at least a portion of the tube re_at ⁇ ve to the bore axis; means for circulating fluid between the tube and the bore wall; and means for rotating the tube such that the radial extent of the annulus varies with rotation of the tuoe.
  • the circulating means may comprise a surface, subsurface or downhole pump.
  • the circulating means may take the form of blades or other impeller forms provided on the tube.
  • the rotating means may comprise a surface motor, such as a too drive or a rotary table, or may comprise a doi.-nole motor.
  • bore cleaning apparatus comprising : a first tube for location a bore, the tube defining a non-circular outer profile; means for circulating fluid between tne tuoe and tne
  • Dore wall; and C means for rotating the tuoe such that the radial extent of the annulus varies witn rotation of the tube.
  • the tube may oe oval, teardrop shaped, elliptical or square, or indeed of any suitable non-circular form.
  • the tube wall may oe circular and carry a longitudinally extending blade, rib, extension, or tne like.
  • the outer profiles of adjacent sections of tube are not axially continuous along the length of tne tube, but rather are arranged to centralise the tube m the bore, and thus obviate the requirement to provide stabilisers or centralisers in combination with the tube.
  • the orientation of adjacent sections of oval pipe may alternate by 90° such that tne tube axis remains substantially central m the bore as the tube rotates.
  • the orientation of the ovality may vary along the length of the tube a gentle helix.
  • Tne manufacture of sucn tube may oe relative./ straightforward, for example a conventional length of drill pipe may simply be passed between rollers and cold formed to create an oval profile.
  • a bore cleaning method comprising the steps of: passing fluid through a bore annulus externally of a first tube; and rotating the tube such that the radial extent of tne annulus varies witn rotation of the tube.
  • bore cleaning apparatus comprising : a first tube for location m a bore; means for circulating fluid between the tuoe ano the bore wall; and means for rotating the tube such that tne radial extent of the annulus varies with rotation of the tube.
  • Figure 1 is a schematic view of apparatus for use a bore cleaning method m accordance with a preferred embodiment of tne present invention
  • Figure 2 is an enlarged sectional view on line 2-2 of Figure 1;
  • Figure 3 is an enlarged sectional view on line 3-3 of Figure 1;
  • Figure & is a schematic view of bore cleaning apparatus accordance with another aspect ot the present invention; ana
  • Figure 5 _s an enlarged cross-sectional view on _me 5-5 of Figure L - Reference _s first made to Figure i or tne drawings, whicn illustrates a oore 10 being cleaned using a method _n accordance with a preferred embodiment or tne present invention.
  • the illustrated bore 10 has seen lined with stee casing 12 and accommodates ⁇ smaller diameter production or completion tubing string 14.
  • the Figure illustrates two of tne "pipe joints" 16, 17 forming the production string 14 and which are coupled conventional fasnion by pin and box couplings 18.
  • the string Id is positioned relative to the casing 12 by a number ot centralisers 20, 21, two of wnich are illustrated n Figure .
  • the first of these certrai sers 20 is illustrated _n Figure 2 of the drawings, which shows a cross section of a "rotating" centraliser 20, that is a centraliser which is fixed to the string 14 and rotates witn the string 14.
  • the centraliser 20 comprises a generally annular body 22 which is axially and rotationally fixed to the string 14 by a lock screw 24.
  • the body 22 defines six olades 26 defining a swept diameter slightly smal.er than the internal diameter of tne casing ⁇ 2.
  • FIG. 3 shows a cross section of a "non-rotating" centraliser 21, that is a centraliser which is rotatable relative to the string 14 ana tends not to rotate witnm the casing 12.
  • the centraliser 21 comprises a generally annular body 42 which is mounted on the string 14 via an eccentric bearing 43 fixed relative to the string 14 by a loc screw 44.
  • the body 42 defines six blades 46 defining a swept diameter slight / smaller than tne internal diameter of tne casing 12.
  • tne string 14 is positioned in the casing 12, either after tne casing 12 has been run and cemented place, or some cases the production string 14 and casing 12 are run m together.
  • the cementing operations, and other operations carried out the Pore will have resulted in solid particles gathering the Pore 10, particularly on tne .o side of inclined portions of tie bore 10.
  • cleaning fluid is circulated down tnrough tne string 14 and up through tne annulus 52 between the string 14 and the casing 12, while the string 14 is rotated from surface .
  • the offset created by tne centralisers 20, 21 induces a sweeping eccentric movement of the string 14, which tends to sweep the cleaning fluid around the bore 10.
  • the fluid thus provides a more effective scouring action than solely axial flow, and the sweeping action is effective m agitating solid material which has settled on tne low side of inclined bores.
  • the sweeping motion cr the string 14 tends to induce helical fluid flow in the arnulus 52, improving fluid distribution around the annulus 52.
  • the motion of the string 14 may be controlled by the relative orientation and positioning of the centralisers
  • FIGS. 4 ana 5 of tne drawings illustrate oore cleaning apparatus m accordance with a further embodiment of tne present invention.
  • the apparatus 50 is shown located a cas g- lined bore 52, and comprises a number of pipe joints 54, 55 joined by conventional connectors.
  • Each pipe joint 54, 55 comprises three oval sections 54a, 54b, 54c and 55a, 55b, 55c, one of which is illustrated m enlarged cross-section m Figure 5. It will be noted from Figure 4 that the ovality of adjacent sections are oriented 90° from one another .
  • the offset may be induced by providing an imbalance in the tube, which may be coaxial with the bore when stationary, such that on rotating the tube the imbalance causes the tube to bow or oend.
  • embodiments specifically descrme a cleaning operation; embodiments of the invention ⁇ ay also be utilised m d ⁇ llm ⁇ operations, where tne eccentric or sweeping motion cf the rotating drml string serves to facilitate entramment of drill cuttings in circulating drilling fluid and prevent settlement of drill cuttings, and references herein to "bore cleaning" are intended to encompasses such uses of the invention.

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)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un procédé et un appareil de nettoyage d'un forage percé afin d'accéder à une formation d'hydrocarbures souterraine. Dans l'un des modes de réalisation de l'invention, l'appareil de nettoyage d'un forage (10) comprend un tubage d'exploitation (14) positionné à proximité d'un boîtier (12) dans un forage (10) par des éléments de centrage (20, 21). L'élément de centrage (20) est fixé au tubage (14) et tourne avec celui-ci, alors que l'élément de centrage (21) est monté rotatif autour du tubage et stationnaire dans le boîtier (12). Les éléments de centrage (20, 21) dévient le tubage dans le boîtier (12) afin d'induire un mouvement de balayage excentrique du tubage (14) lorsqu'il est mis en rotation, de balayer le fluide de nettoyage autour du forage (10). Ceci est réalisé à l'aide de lames (26, 46) se trouvant sur les éléments de centrage (20, 21).
PCT/GB2001/000800 2000-02-24 2001-02-23 Nettoyage de forage WO2001063087A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001233961A AU2001233961A1 (en) 2000-02-24 2001-02-23 Bore cleaning

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0004251A GB0004251D0 (en) 2000-02-24 2000-02-24 Bore Cleaning
GB0004251.5 2000-02-24
GB0010376.2 2000-04-29
GB0010376A GB0010376D0 (en) 2000-04-29 2000-04-29 Bore cleaning

Publications (1)

Publication Number Publication Date
WO2001063087A1 true WO2001063087A1 (fr) 2001-08-30

Family

ID=26243707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/000800 WO2001063087A1 (fr) 2000-02-24 2001-02-23 Nettoyage de forage

Country Status (2)

Country Link
AU (1) AU2001233961A1 (fr)
WO (1) WO2001063087A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002035055A1 (fr) * 2000-10-27 2002-05-02 Sps-Afos Group Limited Outil combine de fraisage/raclage
WO2004085787A2 (fr) * 2003-03-25 2004-10-07 Specialised Petroleum Services Group Limited Outil de nettoyage a double fonction
GB2412393A (en) * 2004-03-26 2005-09-28 Downhole Products Plc Apparatus and method for mobilising drill cuttings in a well
US8550183B2 (en) 2008-10-09 2013-10-08 National Oilwell Varco, L.P. Drilling method
CN105114016A (zh) * 2015-08-19 2015-12-02 中国石油天然气集团公司 管柱清洗装置
US9689209B2 (en) 2010-12-29 2017-06-27 Nov Downhole Eurasia Limited Large gauge concentric underreamer
CN107497735A (zh) * 2017-08-23 2017-12-22 苏州市吴通电子有限公司 一种pcb板孔除渣装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656565A (en) * 1970-09-23 1972-04-18 Fred K Fox Rotary drilling tool
US4428441A (en) * 1979-04-04 1984-01-31 Mobil Oil Corporation Method and apparatus for reducing the differential pressure sticking tendency of a drill string
US4653598A (en) * 1984-11-23 1987-03-31 Atlantic Richfield Company Drainhole drilling assembly with oriented elliptic drill collar
US5447200A (en) * 1994-05-18 1995-09-05 Dedora; Garth Method and apparatus for downhole sand clean-out operations in the petroleum industry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656565A (en) * 1970-09-23 1972-04-18 Fred K Fox Rotary drilling tool
US4428441A (en) * 1979-04-04 1984-01-31 Mobil Oil Corporation Method and apparatus for reducing the differential pressure sticking tendency of a drill string
US4653598A (en) * 1984-11-23 1987-03-31 Atlantic Richfield Company Drainhole drilling assembly with oriented elliptic drill collar
US5447200A (en) * 1994-05-18 1995-09-05 Dedora; Garth Method and apparatus for downhole sand clean-out operations in the petroleum industry

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002035055A1 (fr) * 2000-10-27 2002-05-02 Sps-Afos Group Limited Outil combine de fraisage/raclage
GB2402949A (en) * 2000-10-27 2004-12-22 Specialised Petroleum Serv Ltd Combined milling and scraping tool
GB2402949B (en) * 2000-10-27 2005-06-22 Specialised Petroleum Serv Ltd Combined milling and scraping tool
WO2004085787A2 (fr) * 2003-03-25 2004-10-07 Specialised Petroleum Services Group Limited Outil de nettoyage a double fonction
WO2004085787A3 (fr) * 2003-03-25 2005-04-07 Specialised Petroleum Serv Ltd Outil de nettoyage a double fonction
US7559374B2 (en) 2003-03-25 2009-07-14 Specialised Petroleum Services Group Limited Dual function cleaning tool
GB2414758A (en) * 2003-03-25 2005-12-07 Specialised Petroleum Serv Ltd Dual function cleaning tool
GB2414758B (en) * 2003-03-25 2007-07-18 Specialised Petroleum Serv Ltd Dual function cleaning tool
GB2412393B (en) * 2004-03-26 2008-02-13 Downhole Products Plc Apparatus and method
GB2412393A (en) * 2004-03-26 2005-09-28 Downhole Products Plc Apparatus and method for mobilising drill cuttings in a well
US8550183B2 (en) 2008-10-09 2013-10-08 National Oilwell Varco, L.P. Drilling method
US9689209B2 (en) 2010-12-29 2017-06-27 Nov Downhole Eurasia Limited Large gauge concentric underreamer
CN105114016A (zh) * 2015-08-19 2015-12-02 中国石油天然气集团公司 管柱清洗装置
CN105114016B (zh) * 2015-08-19 2017-12-05 中国石油天然气集团公司 管柱清洗装置
CN107497735A (zh) * 2017-08-23 2017-12-22 苏州市吴通电子有限公司 一种pcb板孔除渣装置
CN107497735B (zh) * 2017-08-23 2023-08-18 苏州市吴通电子有限公司 一种pcb板孔除渣装置

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Publication number Publication date
AU2001233961A1 (en) 2001-09-03

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