EP1880077A1 - Pulling tool for use in oil and gas wells - Google Patents

Pulling tool for use in oil and gas wells

Info

Publication number
EP1880077A1
EP1880077A1 EP06733124A EP06733124A EP1880077A1 EP 1880077 A1 EP1880077 A1 EP 1880077A1 EP 06733124 A EP06733124 A EP 06733124A EP 06733124 A EP06733124 A EP 06733124A EP 1880077 A1 EP1880077 A1 EP 1880077A1
Authority
EP
European Patent Office
Prior art keywords
pulling tool
driving wheels
oil
arms
gas wells
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Withdrawn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
EP06733124A
Other languages
German (de)
French (fr)
Other versions
EP1880077A4 (en
Inventor
Per Olav Haughom
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.)
WELLBORE SOLUTIONS AS
Original Assignee
Hav Technology AS
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 Hav Technology AS filed Critical Hav Technology AS
Publication of EP1880077A1 publication Critical patent/EP1880077A1/en
Publication of EP1880077A4 publication Critical patent/EP1880077A4/en
Withdrawn legal-status Critical Current

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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/14—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/001—Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole

Definitions

  • the present invention relates to a specialized pulling tool for use in the inspection and maintenance of oil and gas wells.
  • a pulling tool In connection with maintenance and inspection in long horizontal wells, a pulling tool must be used in order to reach sufficiently far into the well with maintenance tools to carry out necessary maintenance operations.
  • Such equipment may consist, for example, of valves and measurement equipment with associated communication equipment for communication to the surface.
  • the need for efficient maintenance and inspection equipment increases as more sophisticated equipment is deployed in the wells.
  • US Patent No. 6 273 189 shows an example of prior art wherein a well tractor includes electromotors mounted in the driving wheels, and between the motor and driving wheels there is provided a somewhat complicated system including a harmonic gear for increasing the torque on the driving wheels.
  • a hydraulic system is used that includes cylinders for activating the arms that press the driving wheels against the borehole wall.
  • the present invention provides a solution wherein the pulling tool is electrically powered, without the use of hydraulics.
  • the invention is characterized in the features set forth in the independent claim 1.
  • Fig. 1 shows the principle of a pulling tool deployed in a well.
  • Fig. 2 shows a module having an inlaid cut.
  • Fig. 3 shows details of a wheel with motor and supporting arrangements.
  • electromotors are built into driving wheels 4 on the pulling tool, the velocity of the driving wheels being controlled by a frequency transformer regulating the frequency of the current supplied to the motor.
  • the wheels 4 with the embedded electromotor are pressed against the borehole wall 3 by means of an electric, adjustable strength actuator unit.
  • the driving wheels are retracted by means of a spring mechanism so that the pulling tool can be pulled back and out of the well.
  • the pulling tool is preferably comprised of independent modules 5 that are put together in the number necessary to attain a particular objective.
  • the driving wheels 4 consist of two halves supported by ball bearings 16 arranged on each side of the arm 7.
  • the bolt 19 keeps the two halves of the wheel together.
  • the rotation is provided by a permanent magnet motor comprised of permanent magnets 17 and a coil 18. Magnetic forces between the coils 18 andappel
  • the permanent magnets 17 generate a torque that drives the wheels.
  • the velocity and force are determined by the frequency and voltage supplied to the coil 18.
  • the withdrawal of the pulling tool is performed using the winch 1.

Landscapes

  • 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)

Abstract

A pulling tool for use in oil and gas wells, especially suited for the inspection and maintenance of equipment deployed in horizontal wells. The pulling tool is assembled of modules (5) that are screwed together at threaded connections (8). Each module is provided with a driving wheel (4) connected to the arm (7) in such a manner that it may be pressed against the borehole wall by means of a rotating electric activator (13) and the gear connections (12), (11), and (20). The rotation of the driving wheels (4) is performed by an electromotor consisting of permanent magnets (17) and an electric coil (18). The velocity and power is determined by the frequency and voltage of the power input through the cable (2). The withdrawal of the pulling tool after the completion of a task is performed using the winch (1).

Description

χ
"Pulling tool"
The present invention relates to a specialized pulling tool for use in the inspection and maintenance of oil and gas wells. In connection with maintenance and inspection in long horizontal wells, a pulling tool must be used in order to reach sufficiently far into the well with maintenance tools to carry out necessary maintenance operations.
Today, oil and gas wells are provided with sophisticated equipment in order to optimize the recovery. Such equipment may consist, for example, of valves and measurement equipment with associated communication equipment for communication to the surface. The need for efficient maintenance and inspection equipment increases as more sophisticated equipment is deployed in the wells.
US Patent No. 6 273 189 shows an example of prior art wherein a well tractor includes electromotors mounted in the driving wheels, and between the motor and driving wheels there is provided a somewhat complicated system including a harmonic gear for increasing the torque on the driving wheels. In addition, a hydraulic system is used that includes cylinders for activating the arms that press the driving wheels against the borehole wall.
Currently, different design pulling tools are utilized. The most commonly used are electro/hydraulic devices wherein the thruster device of the pulling tool is powered by hydraulic motors connected to a pumping assembly driven by electric power supplied through cable from the surface. Hydraulic devices to be applied in oil or gas wells with high pressures and high temperatures become complex technical arrangements. To resist high pressures, the hydraulic system must be pressure compensated, and extremely high demands are put on seal assemblies. The efficiency of small hydraulic devices is very poor. With a limited power delivery through long supply lines, the pulling force of the pulling tool becomes very limited. Also, small-dimension hydraulic motors are very expensive to manufacture and maintain. Today, there is a demand for more efficient and less expensive solutions, so that the maintenance of wells can be optimized by enabling more maintenance operations to be performed with pulling tools without the use of heavier and very costly equipment. The present invention provides a solution wherein the pulling tool is electrically powered, without the use of hydraulics. The invention is characterized in the features set forth in the independent claim 1.
The invention will now be explained in more detail with reference to an exemplary embodiment and with reference to the accompanying drawings.
Fig. 1 shows the principle of a pulling tool deployed in a well.
Fig. 2 shows a module having an inlaid cut.
Fig. 3 shows details of a wheel with motor and supporting arrangements.
According to the present invention, electromotors are built into driving wheels 4 on the pulling tool, the velocity of the driving wheels being controlled by a frequency transformer regulating the frequency of the current supplied to the motor. The wheels 4 with the embedded electromotor are pressed against the borehole wall 3 by means of an electric, adjustable strength actuator unit. When the power is switched off, the driving wheels are retracted by means of a spring mechanism so that the pulling tool can be pulled back and out of the well. The pulling tool is preferably comprised of independent modules 5 that are put together in the number necessary to attain a particular objective.
From a winch 1 positioned on the surface, power and signal cable 2 runs down to a control unit 6 connected to the modules 5. The pulling tool is assembled of the independent modules 5 by means of threaded joints 8. Electric cables are run in the slot 9 between the modules. The driving wheels 4 with the embedded electromotor are pressed against the wall 3 of the well by means of electrically activated arms 7. The activation is accomplished using an electric activator 13 that through the angular gear 12 and gear wheels 11 is connected to the cogging 20 on the arms 7. Rotation of the activator 13 will cause a movement of the arm 7 and thereby move the driving wheels 4 in a radial direction out from the aperture 10. When the power is switched off, the wheels 4 and arms 7 are retracted into the slot 10 by means of a spring 15. The arms 7 are non-rotatably supported by the bolt 14.
The driving wheels 4 consist of two halves supported by ball bearings 16 arranged on each side of the arm 7. The bolt 19 keeps the two halves of the wheel together. The rotation is provided by a permanent magnet motor comprised of permanent magnets 17 and a coil 18. Magnetic forces between the coils 18 and „
the permanent magnets 17 generate a torque that drives the wheels. The velocity and force are determined by the frequency and voltage supplied to the coil 18. The withdrawal of the pulling tool is performed using the winch 1.

Claims

1. A pulling tool, in particular for use in oil and gas wells, wherein the pulling tool includes a number of driving wheels (4) positioned 90 degrees relative to each other and in such a manner that they may be moved in a radial direction and pressed against the wall (3) of the well by means of arms (7), the driving wheels
(4) being driven by one or more electromotors arranged in or nearby the driving wheels (4), characterized in that the permanent magnets (17) of the electromotor(s) are mounted in the driving wheels (4) and form an integrated part thereof.
2. The pulling tool of claim 1 , characterized in that the activation of the arms (7) is performed by means of an electric activator (13) connected to the arms (7) through an angular gear (12) and gear wheels (11) engaging the cogging (20) on the arms (7).
3. The pulling tool of claims 1 and 2, characterized in that the pulling tool is assembled of individual modules
(5) connected by threaded connections (8).
EP06733124.9A 2005-04-28 2006-04-28 Pulling tool for use in oil and gas wells Withdrawn EP1880077A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20052085A NO324404B1 (en) 2005-04-28 2005-04-28 Device for drawing tools for use in underground wells
PCT/NO2006/000159 WO2006115418A1 (en) 2005-04-28 2006-04-28 Pulling tool for use in oil and gas wells

Publications (2)

Publication Number Publication Date
EP1880077A1 true EP1880077A1 (en) 2008-01-23
EP1880077A4 EP1880077A4 (en) 2015-04-01

Family

ID=35276295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06733124.9A Withdrawn EP1880077A4 (en) 2005-04-28 2006-04-28 Pulling tool for use in oil and gas wells

Country Status (3)

Country Link
EP (1) EP1880077A4 (en)
NO (1) NO324404B1 (en)
WO (1) WO2006115418A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2106493A4 (en) * 2007-01-23 2014-06-18 Wellbore Solutions As Device for transport of tools in wellbores and pipelines
NO326592B1 (en) * 2007-03-13 2009-01-19 Aker Well Service As Wireline tractor with displaceable wheel adjustment mechanism
NO333749B1 (en) * 2007-08-08 2013-09-09 Wellbore Solutions As Coupling unit for converting mechanical torque to hydraulic fluid pressure in a drill bit for use in boreholes
DK2505768T3 (en) 2011-03-30 2016-06-27 Welltec As Modular well tool
EP2505770A1 (en) 2011-03-30 2012-10-03 Welltec A/S Torque member
EP2505771A1 (en) * 2011-03-30 2012-10-03 Welltec A/S Arm assembly
EP2505769B1 (en) * 2011-03-30 2013-11-06 Welltec A/S Service panel
EP2505767A1 (en) * 2011-03-30 2012-10-03 Welltec A/S Fail-safe spring
EP2505772B1 (en) 2011-03-30 2013-05-08 Welltec A/S Hydraulic assembly
GB201316354D0 (en) * 2013-09-13 2013-10-30 Maersk Olie & Gas Transport device
NO336694B1 (en) * 2014-01-24 2015-10-19 Altus Intervention As Cable tractor comprising a disc-shaped cutting device for perforating a production pipe wall and method for perforating a production pipe wall
NO344461B1 (en) 2017-07-06 2019-12-23 Well Conveyor As Pulling tool used in a borehole and / or pipeline and a drive module for a pulling tool
BR102017021405B1 (en) * 2017-10-05 2021-12-28 Petróleo Brasileiro S.A. - Petrobras DEVICE FOR CENTRALIZING AND/OR TRACING A TOOL IN A DUCT INCLUDING MAGNETIC WHEELS AND/OR EXPANDABLE ARMS
NO345947B1 (en) 2020-06-03 2021-11-08 Well Innovation As Pulling tool
CN111991579B (en) * 2020-08-26 2022-01-11 刘海燕 A disinfection belt cleaning device for medical treatment gynaecology and obstetrics's disk household utensils

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273189B1 (en) * 1999-02-05 2001-08-14 Halliburton Energy Services, Inc. Downhole tractor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604063A1 (en) * 1976-02-03 1977-08-04 Miguel Kling SELF-PROPELLING AND SELF-LOCKING DEVICE FOR DRIVING ON CANALS AND FORMED BY LONG DISTANCES
NL1014182C2 (en) * 2000-01-26 2001-07-27 Special Products For Industry Wheel provided with drive means.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273189B1 (en) * 1999-02-05 2001-08-14 Halliburton Energy Services, Inc. Downhole tractor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006115418A1 *

Also Published As

Publication number Publication date
EP1880077A4 (en) 2015-04-01
NO20052085L (en) 2006-10-30
NO324404B1 (en) 2007-10-08
WO2006115418A1 (en) 2006-11-02
NO20052085D0 (en) 2005-04-28

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