EP0481767B1 - Steigrohrtrennwerkzeug - Google Patents

Steigrohrtrennwerkzeug Download PDF

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Publication number
EP0481767B1
EP0481767B1 EP91309549A EP91309549A EP0481767B1 EP 0481767 B1 EP0481767 B1 EP 0481767B1 EP 91309549 A EP91309549 A EP 91309549A EP 91309549 A EP91309549 A EP 91309549A EP 0481767 B1 EP0481767 B1 EP 0481767B1
Authority
EP
European Patent Office
Prior art keywords
tubing
fluid
motor
tool
rotary
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
EP91309549A
Other languages
English (en)
French (fr)
Other versions
EP0481767A1 (de
Inventor
Manfred Steinkamp
Werner Lau
Bruce Mcgarian
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.)
Smith International Inc
Original Assignee
Red Baron Oil Tools Rental 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 Red Baron Oil Tools Rental Ltd filed Critical Red Baron Oil Tools Rental Ltd
Publication of EP0481767A1 publication Critical patent/EP0481767A1/de
Application granted granted Critical
Publication of EP0481767B1 publication Critical patent/EP0481767B1/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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window

Definitions

  • This invention relates to a tubing cutting tool, and in the preferred embodiment provides a cutting tool suitable for use in an oil or gas well or the like.
  • tubing cutting tool of the present invention is particularly suitable for cutting a tubing string located within a well, but the invention may be embodied in forms suitable for cutting other tubular elements whether or not forming part of an oil or gas well installation.
  • a tube cutting tool comprising a fluid powered rotary motor having a body and a rotary output member. Means are provided for locking the body to a tubing to be cut.
  • the means for locking the body to the tubing includes a first fluid pressure responsive means for locking the body to the tubing to be cut when the pressure of the motor operating fluid exceeds a first predetermined value.
  • the tool includes a second fluid pressure responsive means operable, in response to the pressure of the motor operating fluid exceeding a second predetermined value, to pivot the or each cutting element radially outwardly from its normal position to engage the tubing to be cut.
  • the present invention is characterised in that the fluid flow path for the working fluid incorporates a restriction downstream of the second fluid pressure responsive means whereby an increase in fluid flow rate results in an increase in fluid pressure at both the first fluid pressure responsive means and the second fluid pressure responsive means; the locking means, the rotary motor, the second fluid pressure responsive means and the flow restriction are arranged in serial relationship whereby the working fluid passes through these elements successively; the second predetermined value of pressure of the motor operating fluid is different from the first predetermined value of the pressure of the motor operating fluid.
  • the preferred embodiment of the invention also includes a scraping or milling head which is connected to the rotary output member of the rotary motor and which may be rotated by the rotary motor for the purpose of cleaning the internal surface of the tubing within which the tool is located.
  • the motor is operated by fluid at a pressure less than the second predetermined pressure with the result that rotation of the motor will cause rotation of the scraping or milling tool, but will not cause the cutting elements to be moved radially outwardly into engagement with the tubing.
  • the motor may be operated at a pressure less than the first predetermined pressure so that the scraping/milling tool may be rotated as the tool is moved through the tubing. For this purpose it is necessary to restrain the body of the motor against rotation, and this can conveniently be effected by connecting the motor body to a suitable tubing string which is used for the purpose of moving the tool through the tubing to be cleaned and for communicating operating fluid to the motor.
  • a tubing cutting tool 1 located within a length of tubing 2, for example a tubing string which itself is located within a well bore
  • the tool 1 comprises a plurality of interconnected subs and is connected at its upper end to a tubing string 3 by means of which the tool may be run through the tubing 2.
  • the central bore 4 of the tubing string is used to carry an operating fluid, for example a mud, to the tool 1.
  • the tool 1 comprises a rotary motor 5 which, in use, is driven by the flow of operating fluid therethrough.
  • the body of the motor 5 is connected to an upper sub 6 which has mounted thereon a multiplicity of plungers 7.
  • the plungers 7 are normally biased radially inwardly by suitable springs (not shown) so that the radially outer extremity of the plungers is flush with the surface of the sub 6.
  • the radially inner ends of the plungers 7 are exposed via radial bores 8 to the fluid pressure within the sub 6 so that if the fluid pressure exceeds a first predetermined value the plungers 7 are moved radially outwardly to engage the tubing 2.
  • the radially outer ends of the plungers may be provided with suitable teeth or serrations, and may be hardened.
  • the motor 5 includes a rotary output member 9 which is connected to a rotary cutter 10.
  • the rotary cutter 10 is shown in mare detail in Figure 2 and comprises a pair of cutting elements 11,12 which are pivotally mounted on a pin 13 which is secured to the body 14 or the rotary cutter.
  • each cutting element 11,12 is suitably protected, e.g. by means of inserts or crushed particles of suitable hardening material, e.g. tungsten carbide or cubic boron nitride.
  • suitable hardening material e.g. tungsten carbide or cubic boron nitride.
  • the cutting elements are located such that the radially outermost extremity of each cutting element is located within the body 14 of the rotary cutter.
  • Each cutting element may, however, be pivoted to move the cutting edge thereof radially outwardly to engage the internal surface 15 of the tubing within which the tool is located.
  • the radially outwardly extreme position of the cutting element 12 is illustrated on the right-hand side of Figure 2, and in this position the outermost point of the cutting element will have cut through the wall of the tubing 2.
  • a fluid pressure responsive device is provided in the form of a piston 16 working in a cylinder 17. Seals 18,19 are provided between the piston 16 and the cylinder 17 and the piston is normally biased upwardly to the position illustrated on the right-hand half of Figure 2 by a spring 20. Further upward movement of the piston 16 is prevented by a spring clip 21 located within a groove in the cylinder wall.
  • operating fluid exiting from the motor 5 is communicated through the central bore of the tool to the chamber 22 defined within the cylinder 17 above the piston 16. This fluid pressure acts downwardly on the piston 16. Fluid may leave the chamber 22 via passages 23 and may then flow through an annular passage 24 formed between the cylinder 17 and the body 14 to passages 25 located below the level of the cutting elements 11,12.
  • the passages 23,25 provide a restriction to the flow of fluid whereby the pressure within the charger 22 increases as flow rate of working fluid increases.
  • Seals 26,27 are located between the cylinder 17 and the body 14 of the rotary cutter.
  • the rotary cutter 10 is connected by a sub 28 to a scraping or milling tool 29 having an outside diameter 30 substantially corresponding to the internal diameter of the tubing 2.
  • the tool 1 is run through the tubing 2 by means of a suitable tubing string. If it is desired to clean the internal surface 15 of the tubing a suitable working fluid, for example a mud, is pumped through the string to which the tool 1 is connected to flow through the motor 5 at a predetermined rate This predetermined rate is sufficient to operate the motor and thereby rotate the rotary cutter 10 and with it the scraping/milling tool 30 to clean the interior surface of the tubing.
  • a suitable working fluid for example a mud
  • the tool is located at a suitable position and the flow rate off working fluid is increased.
  • the increased flow rate causes the motor to operate at a faster speed and, due to the flow restriction provided by the motor itself and the passages 23,25 causes the fluid pressure within the tool to increase both upstream and downstream of the motor.
  • the increased fluid pressure upstream of the motor is communicated via the passages 8 to the plungers 7, causing the plungers to move radially outwardly to grip the tubing to fix the motor body relative to the tubing
  • the fluid pressure downstream of the motor 5 operates within the chamber 22 to bias the piston 16 downwardly and thereby move the cutters 11,12 radially outwardly to engage the internal wall of the tubing.
  • the tool described above may perform either a tube cleaning operation or a tube cutting operation, or a combination of these operations.
  • the tool is relatively simple in construction and does not require withdrawal from the tubing for resetting after each cut has been made.
  • the cylinder 17 may be integral with the body 14 and the chambers 22 and passages 23,25 bored accordingly. Plugs would be fitted to seal the upper end of the passage 24 running the length of the body connecting passages 23 and 25.

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)
  • Drilling Tools (AREA)
  • Milling Processes (AREA)
  • Earth Drilling (AREA)
  • Turning (AREA)
  • Adornments (AREA)
  • Materials For Medical Uses (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sawing (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (8)

  1. Rohrleitungsschneidvorrichtung (1), die einen fluidgetriebenen Drehmotor (5) mit einem Körper und einem Drehausgangselement (9) umfaßt; eine Einrichtung (7) zum Arretieren des Körpers an der zu schneidenden Rohrleitung (2); einen Drehschneider (10), der mit dem Drehausgangselement des Motors verbunden ist und sich damit dreht, wobei der Drehschneider wenigstens ein schwenkbares Schneidelement (11) aufweist, das sich normalerweise innerhalb der Vorrichtung in einem ersten radialen Abstand zu der Längsachse der Vorrichtung befindet und aus seiner normalen Stellung radial nach außen geschwenkt werden kann, so daß es mit der zu schneidenden Rohrleitung in Kontakt kommt; wobei die Einrichtung (7) zum Arretieren des Körpers an der Rohrleitung eine erste auf Fluiddruck ansprechende Einrichtung ist, die den Körper an der zu schneidenden Rohrleitung arretiert, wenn der Druck des den Motor betreibenden Fluids einen ersten vorgegebenen Wert übersteigt; und wobei die Vorrichtung des weiteren eine zweite auf Fluiddruck ansprechende Einrichtung (16) umfaßt, die in Reaktion darauf, daß der Druck des den Motor betreibenden Fluids einen zweiten vorgegebenen Wert übersteigt, das oder jedes Schneidelement aus seiner normalen Stellung radial nach außen schwenkt, so daß es mit der zu schneidenden Rohrleitung in Kontakt kommt; dadurch gekennzeichnet, daß der Fluidflußweg für das den Motor betreibende Fluid eine Verengung (23, 25) unterhalb der zweiten auf Fluiddruck ansprechenden Einrichtung einschließt, wodurch eine Zunahme der Fluiddurchflußgeschwindigkeit zu einer Zunahme des Fluiddrucks sowohl an der ersten auf Fluiddruck ansprechenden Einrichtung als auch an der zweiten auf Fluiddruck ansprechenden Einrichtung führt; dadurch, daß die Arretiereinrichtung (7), der Drehmotor (5), die zweite auf Fluiddruck ansprechende Einrichtung (16) und die Durchflußverengung (23, 25) in Reihe angeordnet sind, wodurch das Antriebsfluid alle diese Elemente nacheinander passiert; und dadurch, daß der zweite vorgegebene Wert des Drucks des den Motor betreibenden Fluids sich von dem ersten vorgegebenen Wert des Drucks des den Motor betreibenden Fluids unterscheidet.
  2. Vorrichtung nach Anspruch 1, wobei der Drehschneider einen Schneidkörper (14) aufweist und das oder jedes Schneidelement schwenkbar an einem Zapfen (13) angebracht ist, der an dem Schneidkörper befestigt ist.
  3. Vorrichtung nach einem der vorangehenden Ansprüche 1 oder 2, wobei die erste auf Fluiddruck ansprechende Einrichtung eine Vielzahl von radial zu betätigenden, federgespannten Stößein umfaßt.
  4. Vorrichtung nach einem der vorangehenden Ansprüche, wobei die zweite auf Fluiddruck ansprechende Einrichtung einen federgespannten Kolben umfaßt.
  5. Vorrichtung nach Anspruch 4, wobei der Kolben in Längsrichtung betätigt werden kann und in Reaktion darauf, daß der Druck des den Motor betreibenden Fluids den zweiten vorgegebenen Wert übersteigt, das oder jedes Schneidelement aus seiner normalen Stellung radial nach außen schwenkt, so daß es mit der zu schneidenden Rohrleitung in Kontakt kommt.
  6. Vorrichtung nach einem der vorangehenden Ansprüche, die des weiteren einen Schab- oder Fräskopf (29) umfaßt, der mit dem Drehausgangselement des Drehmotors verbunden ist und durch den Drehmotor gedreht werden kann, um die Innenfläche der Rohrleitung zu reinigen, in der sich die Vorrichtung befindet.
  7. Vorrichtung nach Anspruch 6, die des weiteren eine Einrichtung zum Betreiben des Motors bei einem Fluiddruck umfaßt, der niedriger ist als der zweite vorgegebene Druck, um Drehung des Schab- oder Fräskopfes zu bewirken, so daß Drehung des Motors bei diesem Betriebsdruck nicht dazu führt, daß das oder jedes Schneidelement radial nach außen in Kontakt mit der Rohrleitung bewegt wird.
  8. Vorrichtung nach Anspruch 6 oder Anspruch 7, die des weiteren eine Einrichtung zum Betreiben des Motors bei einem Fluiddruck umfaßt, der niedriger ist als der erste vorgebene Druck, um den Schab-/Fräskopf zu drehen, wenn die Vorrichtung durch die Rohrleitung bewegt wird.
EP91309549A 1990-10-16 1991-10-16 Steigrohrtrennwerkzeug Expired - Lifetime EP0481767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9022424 1990-10-16
GB9022424A GB2248792B (en) 1990-10-16 1990-10-16 Tubing cutting tool

Publications (2)

Publication Number Publication Date
EP0481767A1 EP0481767A1 (de) 1992-04-22
EP0481767B1 true EP0481767B1 (de) 1994-12-14

Family

ID=10683786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91309549A Expired - Lifetime EP0481767B1 (de) 1990-10-16 1991-10-16 Steigrohrtrennwerkzeug

Country Status (8)

Country Link
EP (1) EP0481767B1 (de)
AT (1) ATE115678T1 (de)
DE (1) DE69105910T2 (de)
DK (1) DK0481767T3 (de)
ES (1) ES2068521T3 (de)
GB (1) GB2248792B (de)
GR (1) GR3015402T3 (de)
NO (1) NO301992B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242017A (en) * 1991-12-27 1993-09-07 Hailey Charles D Cutter blades for rotary tubing tools
US5265675A (en) * 1992-03-25 1993-11-30 Atlantic Richfield Company Well conduit cutting and milling apparatus and method
GB9317128D0 (en) * 1993-08-17 1993-09-29 Swietlik George Equipment to reduce torque on a drill string
GB9520347D0 (en) * 1995-10-05 1995-12-06 Red Baron Oil Tools Rental Milling of well castings
GB2305952B (en) * 1995-10-05 1999-02-17 Red Baron Milling of well casings
GB9604917D0 (en) * 1996-03-08 1996-05-08 Red Baron Oil Tools Rental Removal of wellhead assemblies
DE19620756A1 (de) 1996-05-23 1997-11-27 Wirth Co Kg Masch Bohr Verfahren und Vorrichtung zum Abtrennen von im Boden verankerten Rohren oder Pfeilern
GB2394740B (en) * 2002-11-01 2006-03-01 Smith International Lockable motor assembly and method
US8403048B2 (en) * 2010-06-07 2013-03-26 Baker Hughes Incorporated Slickline run hydraulic motor driven tubing cutter
US8915298B2 (en) 2010-06-07 2014-12-23 Baker Hughes Incorporated Slickline or wireline run hydraulic motor driven mill

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066163B (de) * 1959-10-01 Joy Manufacturing Company, Pittsburgh, Pa. (V. St. A.) Vorrichtung zum Durchschneiden des Futterrohres eines Tiefbohrloches
US2880804A (en) * 1954-05-07 1959-04-07 Otis Eng Co Apparatus and method for cutting well tubing
US3220478A (en) * 1960-09-08 1965-11-30 Robert B Kinzbach Casing cutter and milling tool
US4047568A (en) * 1976-04-26 1977-09-13 International Enterprises, Inc. Method and apparatus for cutting and retrieving casing from a well bore
SE8702543D0 (sv) * 1987-06-17 1987-06-17 Stig Westman Redskap for arbeten i rorledningar

Also Published As

Publication number Publication date
GB2248792A (en) 1992-04-22
GB2248792B (en) 1994-03-09
NO914067L (no) 1992-04-21
NO914067D0 (no) 1991-10-16
ATE115678T1 (de) 1994-12-15
NO301992B1 (no) 1998-01-05
GR3015402T3 (en) 1995-06-30
DE69105910D1 (de) 1995-01-26
DK0481767T3 (da) 1995-01-30
EP0481767A1 (de) 1992-04-22
DE69105910T2 (de) 1995-07-06
ES2068521T3 (es) 1995-04-16
GB9022424D0 (en) 1990-11-28

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