EP1088151B1 - Fräsvorrichtung im bohrloch - Google Patents

Fräsvorrichtung im bohrloch Download PDF

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Publication number
EP1088151B1
EP1088151B1 EP99936456A EP99936456A EP1088151B1 EP 1088151 B1 EP1088151 B1 EP 1088151B1 EP 99936456 A EP99936456 A EP 99936456A EP 99936456 A EP99936456 A EP 99936456A EP 1088151 B1 EP1088151 B1 EP 1088151B1
Authority
EP
European Patent Office
Prior art keywords
mills
toppling head
stator housing
toppling
rotatable
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.)
Expired - Lifetime
Application number
EP99936456A
Other languages
English (en)
French (fr)
Other versions
EP1088151A1 (de
Inventor
Marc Emmanuel Amory
Simon Lawrence Fisher
Michael Edward Pointing
Onno Willemse
Mark Wilson Anderson
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP99936456A priority Critical patent/EP1088151B1/de
Publication of EP1088151A1 publication Critical patent/EP1088151A1/de
Application granted granted Critical
Publication of EP1088151B1 publication Critical patent/EP1088151B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • E21B27/02—Dump bailers, i.e. containers for depositing substances, e.g. cement or acids
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations

Definitions

  • the invention relates to a device for performing milling operations in an underground borehole.
  • Such milling operations may include the underreaming of the borehole or the cutting of a window in a well tubular.
  • a further disadvantage of the known milling devices is that the rotating mill exerts a high and variable tangential torque to the device which induces the device to run away in tangential direction.
  • the known devices therefore need to be guided by guide means, such as a whipstock, which is fixed firmly inside the casing to avoid the device to run away during the milling operations.
  • the milling device according to the preamble of claim 1 is known from US-A- 1,731,553.
  • a mill is driven by a shaft and complex mitre gear wheel mechanism which is bulky and fragile and therefore not practical for downhole use.
  • the device according to the present invention thereto comprises a flexible drive shaft as described in the characterizing portion of claim 1.
  • the device is equipped with a pair of contra-rotatable mills that exert opposite tangential torques to the device which neutralise each other.
  • Such contra-rotating mills are able to cut in the casing or other well tubular a well-defined window having well-polished rims which can be sealed off easily.
  • the drive mechanism comprises a hydraulic Moineau-type motor having a rotor which is rotatably mounted at the upper end of the stator housing and which is secured to the upper end of the flexible drive shaft and the pivot mechanism comprises a hydraulic piston which is slidably arranged within the stator housing between the outlet of the Moineau-motor and a slant upper surface of the toppling head such that in use the elevated pressure of the driving fluid discharged by the motor presses the piston against said slant upper surface of the toppling head thereby inducing the toppling head to pivot towards the extended position thereof.
  • the hydraulic piston is slidably arranged around the flexible shaft and the flexible shaft is made of a resilient material and exerts a residual torque to the toppling head which torque induces the toppling head to pivot towards its contracted position in the absence of hydraulic pressure exerted to the piston.
  • the device is used as a casing window milling device a cuttings collecting box is secured to the housing beneath the mills and in use the hydraulic driving fluid emerging from the motor flushes cuttings from the mills into the cuttings collecting box.
  • EP-A- 0798443 describes a directional drilling assembly in which a drill bit is driven by a shaft comprising a cardanic coupling and that UK patent application GB 2 311 547 discloses a downhole jetting device which comprises a jet that is connected to a flexible hose to allow the jet to drill a downhole sidetrack.
  • a milling device having a stator housing 1, a toppling head 2 and a pair of contra-rotating twin mills 3 and 4.
  • the twin mills 3 and 4 face each other at a central plane of symmetry of the device which is orthogonal to the plane of drawing of Fig. 1 and which intersects the plane of the drawing at central axis 5.
  • the toppling head 2 is pivotably suspended within the stator housing 1 by a pair of hinge pins 6 which permit the toppling head 2 to rotate about an axis of rotation 7 which is substantially orthogonal to the central axis 5 and the central plane of symmetry of the device.
  • the toppling head 2 comprises a gear box (not shown) having a flexible input shaft 9 and a pair of parallel output shafts 8 which carry the mills 3 and 4 and which are rotated relative to the toppling head 2 at equal rotational speeds but in opposite directions, which are illustrated by arrows 10, in response to rotation illustrated by arrow 12 of the flexible input shaft 7 relative to the stator housing 1 by means of a Moineau-type or other hydraulic or electric motor (not shown).
  • the mills 3 and 4 comprise substantially cylindrical bodies on which helical cutting teeth 11 are mounted at similar but opposite pitch angles which teeth intermesh at the central plane of symmetry of the device.
  • Fig. 2 shows that in the transportation mode the flexible shaft 9 obtains a curved shape and that the toppling head 2 has a slant upper surface 13 which has a top 14 that engages the lower end of a piston 15 which is slidably arranged inside the stator housing 1.
  • the piston 14 and slant upper surface 13 of the toppling head together form a pivoting mechanism which causes the toppling head 2 to rotate towards its extended position which is shown in Fig. 3.
  • Fig. 3 shows that liquid discharged by the hydraulic motor flows through an annular opening 16 between the upper end 17 of the piston 15 and the flexible shaft 9 into the interior 18 of the piston 15, as illustrated by arrows 19.
  • the mills 3 and 4 pivot together with the toppling head 2 about the pivot axis 7 towards their extended position and are simultaneously rotated by the shafts 8 and thereby mill a window 22 in a casing 23 surrounding the device.
  • a guide plate 28 in the collecting box 26 serves to reduce the speed of the liquid so that the cuttings are allowed to be separated by gravity and/or magnetic forces from the liquid and are deposited at the bottom of the box, whereas the liquid is discharged via an opening 29 at the top of the box 26 into the annulus surrounding the device.
  • the device While the mills 3 and 4 are cutting the window 22 in the well casing 23 the device is pulled upwards through the casing as illustrated by arrows 30 by means of a piston (not shown) above the device until the window 22 has the desired length. It is preferred that the device is suspended within the casing 23 from a coiled tubing or drill string (not shown) and that the coiled tubing or drill string is gradually pulled up during the milling operations whilst the piston above the device ensures that the device is moved up through the casing 23 at an accurately defined speed and over an accurately defined distance.
  • the balanced forces exerted by the mills 3 and 4 to the stator housing allow the device to mill a straight and well defined window in the well casing 23 in a quick and accurate manner and without leaving cuttings in the casing interior.
  • the mills may have a non-cylindrical shape, such as a frusto-conical shape. In such case it is preferred that the axes of rotation of the mills intersect each other at the central plane of the device.
  • Fig. 4 shows an embodiment of the device according to the invention where the device is used for underreaming of an uncased underground borehole.
  • the upper part of the device shown in Fig. 4 is similar to the upper part of the device shown in Figs. 1-3 and similar reference numerals denote similar components.
  • the device shown in Fig. 4 however contains no cuttings collection box and has a stator housing 1 which is rotated about the central axis 5 as is illustrated by arrow 40.
  • the device of Fig. 4 is equipped with a single mill 4 which underreams the wellbore 41 as a result of the simultaneous rotation of the stator housing and of the mill 4 relative to the toppling head 2.
  • the toppling head 2 is extended and retracted in the same way as described with reference to Figs. 1-3.
  • the flexible shaft 9 is connected to the output shaft 8 via a gearbox in the toppling head 2, or may alternatively be integrated with the output shaft 8. If desired the underreamer device shown in Fig. 4 may be equipped with a pair of contra-rotatable twin mills 4 similar to those shown in Figs. 1-3.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Earth Drilling (AREA)
  • Milling Processes (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Claims (7)

  1. Vorrichtung zum Durchführen von Fräsvorgängen in einem unterirdischen Bohrloch mit einem Statorgehäuse (1), einem Schwenkkopf (2), der in dem Gehäuse (1) schwenkbar montiert und mit einem oder mehreren drehbaren Fräsern (3, 4) ausgestattet ist, einem Antriebsmechanismus zum Drehen jeden Fräsers (3, 4) relativ zum Schwenkkopf (2) und einem Schwenkmechanismus 6 zum Schwenken des Schwenkkopfes relativ zu dem Gehäuse um eine Schwenkachse (5) zwischen einer zurückgezogenen Stellung, in welcher jeder Fräser (3, 4) im wesentlichen mit dem Statorgehäuse ausgerichtet ist, und einer ausgefahrenen Stellung, in welcher jeder Fräser (3, 4) unter einem Winkel in seitlicher Richtung von dem Gehäuse (1) absteht, wobei das Statorgehäuse eine zentrale Längsebene der Vorrichtung definiert, die im wesentlichen orthogonal zur Schwenkachse (5) ist, dadurch gekennzeichnet, daß der Antriebsmechanismus eine flexible Antriebswelle (9) aufweist, die um eine Drehachse drehbar ist, welche in der zentralen Ebene angeordnet ist und eine Eingangswelle bildet, welche direkt oder indirekt mit jeder Ausgangswelle (8) verbunden ist, auf welcher ein Fräser (3, 4) montiert ist.
  2. Vorrichtung nach Anspruch 1, bei welcher der Schwenkkopf (2) mit einem Paar von gegendrehenden Fräsern (3, 4) ausgestattet ist, die auf Ausgangswellen (8) montiert sind, welche um Drehachsen drehbar sind, die parallel zueinander verlaufen und unter im wesentlichen gleichen Abständen von der zentralen Ebene der Vorrichtung angeordnet sind, wobei die Fräser (3, 4) im wesentlichen zylindrische Körper aufweisen, auf denen wendelförmige Schneidzähne (11) montiert sind, derart, daß die Wendelwinkel der Schneidzähne (11) identisch, aber zueinander entgegengesetzt sind, und die Schneidzähne (11) benachbarter Fräser in oder nahe der zentralen Ebene der Vorrichtung einander zugekehrt sind.
  3. Vorrichtung nach Anspruch 1, bei welcher der Schwenkkopf (2) mit einem Paar von gegendrehenden Fräsern ausgestattet ist, die auf Ausgangswellen (8) montiert sind, welche um Drehachsen drehbar sind, die einander in einem Schnittpunkt in der zentralen Ebene schneiden, wobei die Fräser kegelstumpfförmige Körper haben, auf denen kämmende Schneidzähne montiert sind.
  4. Vorrichtung nach Anspruch 1, bei welcher der Antriebsmechanismus einen Hydraulikmotor aufweist, der einen Rotor hat, welcher innerhalb des Statorgehäuses (1) drehbar montiert und mit der flexiblen Antriebswelle (9) verbunden ist.
  5. Vorrichtung nach Anspruch 4, bei welcher der Hydraulikmotor ein Motor vom Moineau-Typ ist, der an einem oberen Ende des Statorgehäuses (1) angeordnet ist, und bei welcher der Schwenkmechanismus einen Hydraulikkolben (15) aufweist, der innerhalb des Statorgehäuses zwischen dem Auslaß des Moineau-Motors und einer geneigten oberen Fläche (13) des Schwenkkopfes (2) gleitverschieblich angeordnet ist, derart, daß im Gebrauch der erhöhte Druck des vom Motor abgegebenen Antriebsfluids den Kolben gegen die geneigte obere Fläche des Schwenkkopfes drückt, wodurch der Schwenkkopf veranlaßt wird, gegen seine ausgefahrene Position zu schwenken.
  6. Vorrichtung nach Anspruch 4, bei welcher der Hydraulikkolben (15) gleitverschieblich um die flexible Welle (9) herum angeordnet ist, und die flexible Welle (9) aus einem elastischen Material besteht und ein Restdrehmoment auf den Schwenkkopf (2) ausübt, welches den Schwenkkopf dazu veranlaßt, gegen seine zurückgezogene Position zu schwenken, wenn kein Hydraulikdruck auf den Kolben (15) ausgeübt wird.
  7. Vorrichtung nach den Ansprüchen 2 und 5, bei welcher die Vorrichtung zum Fräsen eines Fensters in einer Bohrlochauskleidung befähigt und eine Schneidspäne-Sammelbox (26) an dem Gehäuse unterhalb der Fräser (3, 4) befestigt ist, und im Gebrauch das hydraulische Antriebsfluid, welches aus dem Motor austritt, die Schneidspäne (25) von den Fräsern (3, 4) in die Schneidspäne-Sammelbox (26) spült.
EP99936456A 1998-06-10 1999-06-09 Fräsvorrichtung im bohrloch Expired - Lifetime EP1088151B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99936456A EP1088151B1 (de) 1998-06-10 1999-06-09 Fräsvorrichtung im bohrloch

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98304595 1998-06-10
EP98304595 1998-06-10
EP99936456A EP1088151B1 (de) 1998-06-10 1999-06-09 Fräsvorrichtung im bohrloch
PCT/EP1999/004039 WO1999064715A1 (en) 1998-06-10 1999-06-09 Downhole milling device

Publications (2)

Publication Number Publication Date
EP1088151A1 EP1088151A1 (de) 2001-04-04
EP1088151B1 true EP1088151B1 (de) 2003-02-12

Family

ID=8234868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936456A Expired - Lifetime EP1088151B1 (de) 1998-06-10 1999-06-09 Fräsvorrichtung im bohrloch

Country Status (12)

Country Link
EP (1) EP1088151B1 (de)
CN (1) CN1119499C (de)
AU (1) AU741468B2 (de)
BR (1) BR9911083A (de)
CA (1) CA2334150A1 (de)
DE (1) DE69905364D1 (de)
EA (1) EA002048B1 (de)
ID (1) ID27015A (de)
NO (1) NO314855B1 (de)
NZ (1) NZ508288A (de)
OA (1) OA11626A (de)
WO (1) WO1999064715A1 (de)

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CA2296122C (en) 1999-01-15 2008-07-29 Baker Hughes Incorporated Window forming by flame cutting
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US6536525B1 (en) 2000-09-11 2003-03-25 Weatherford/Lamb, Inc. Methods and apparatus for forming a lateral wellbore
US6474415B1 (en) * 2000-11-15 2002-11-05 Schlumberger Technology Corporation Method and apparatus for milling openings in downhole structures
GB2389129B8 (en) * 2002-05-29 2008-01-29 Lattice Intellectual Property Method and dual reamer apparatus for forming boredhole
US7077212B2 (en) 2002-09-20 2006-07-18 Weatherford/Lamb, Inc. Method of hydraulically actuating and mechanically activating a downhole mechanical apparatus
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US20090308605A1 (en) 2008-06-14 2009-12-17 Mcafee Wesley Mark Methodolgy and apparatus for programmable robotic rotary mill cutting of multiple nested tubulars
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EP2326786B1 (de) * 2008-09-08 2018-04-11 Sinvent AS Vorrichtung und verfahren zur veränderung der seitenwände eines bohrloches
US8146679B2 (en) 2008-11-26 2012-04-03 Schlumberger Technology Corporation Valve-controlled downhole motor
NO329613B1 (no) 2009-04-14 2010-11-22 West Production Tech As Anordning ved nedihullsapparat for maskinering av fôringsrør samt framgangsmåte for deponering av maskineringsspon
US8215400B2 (en) * 2010-10-29 2012-07-10 Halliburton Energy Services, Inc. System and method for opening a window in a casing string for multilateral wellbore construction
MX390694B (es) 2014-07-14 2025-03-21 Aarbakke Innovation A S Herramienta de intervencion de pozos para penetrar obstrucciones en un pozo.
CN107387011A (zh) * 2017-08-02 2017-11-24 西南石油大学 水力推进实现连续切割不同直径套管的井下工具
US10711551B2 (en) * 2018-07-25 2020-07-14 Saudi Arabian Oil Company Milling downhole tubulars
CN111980614B (zh) * 2020-08-28 2022-11-15 中国石油天然气股份有限公司 液力大角度可弯磨铣工具
AU2021390578A1 (en) * 2020-12-02 2023-06-22 Conocophillips Company Method and apparatus for milling a window in casing
CN114922581B (zh) * 2022-05-27 2023-08-18 重庆科技学院 一种井下套管连续开孔装置及其工作方法
CN116255100B (zh) * 2023-04-27 2023-09-12 山东爱特机电技术有限责任公司 一种超级电容储能的电动修井机
CN117145379B (zh) * 2023-10-31 2024-01-30 长沙黑金刚实业有限公司 一种反循环冲击器

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Also Published As

Publication number Publication date
EP1088151A1 (de) 2001-04-04
AU741468B2 (en) 2001-11-29
BR9911083A (pt) 2001-02-20
NO20006247L (no) 2000-12-08
EA002048B1 (ru) 2001-12-24
NZ508288A (en) 2003-03-28
CN1119499C (zh) 2003-08-27
ID27015A (id) 2001-02-22
DE69905364D1 (de) 2003-03-20
NO20006247D0 (no) 2000-12-08
OA11626A (en) 2004-09-09
CN1305562A (zh) 2001-07-25
CA2334150A1 (en) 1999-12-16
NO314855B1 (no) 2003-06-02
AU5155099A (en) 1999-12-30
WO1999064715A1 (en) 1999-12-16
EA200100019A1 (ru) 2001-06-25

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