EP2518257A1 - Chaîne d'outil - Google Patents

Chaîne d'outil Download PDF

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Publication number
EP2518257A1
EP2518257A1 EP11164298A EP11164298A EP2518257A1 EP 2518257 A1 EP2518257 A1 EP 2518257A1 EP 11164298 A EP11164298 A EP 11164298A EP 11164298 A EP11164298 A EP 11164298A EP 2518257 A1 EP2518257 A1 EP 2518257A1
Authority
EP
European Patent Office
Prior art keywords
string
parts
connecting element
tool
tool string
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Withdrawn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
EP11164298A
Other languages
German (de)
English (en)
Inventor
Jørgen HALLUNDBAEK
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.)
Welltec AS
Original Assignee
Welltec 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 Welltec AS filed Critical Welltec AS
Priority to EP11164298A priority Critical patent/EP2518257A1/fr
Priority to CA2834476A priority patent/CA2834476A1/fr
Priority to MX2013012437A priority patent/MX336468B/es
Priority to RU2013152080/03A priority patent/RU2591863C2/ru
Priority to CN201280021013.6A priority patent/CN103502559A/zh
Priority to AU2012247463A priority patent/AU2012247463B2/en
Priority to BR112013027370A priority patent/BR112013027370A2/pt
Priority to US14/114,629 priority patent/US20140076582A1/en
Priority to MYPI2013003844A priority patent/MY166745A/en
Priority to PCT/EP2012/057802 priority patent/WO2012146732A1/fr
Publication of EP2518257A1 publication Critical patent/EP2518257A1/fr
Withdrawn legal-status Critical Current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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/028—Electrical or electro-magnetic connections
    • 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
    • E21B17/02—Couplings; joints
    • 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
    • E21B17/18—Pipes provided with plural fluid passages

Definitions

  • the present invention relates to a tool string for being suspended in a well, the tool string extending in a longitudinal direction and comprising a first string part and a second string part, each having a centre axis and comprising; an electrical connection in a first end, and a fluid channel extending at least partly through the string part, a connecting element rotatably connected to one string part and adapted to be threadably connected to a threaded portion of the other string part, to join the electrical connections of the first and second string parts.
  • the present invention relates to a method for assembling two string parts of a tool string by rotating the connecting element to join electrical connections of the first and second string parts and to force a pipe connection of one string part into a hole in fluid communication with a fluid channel of the other string part.
  • Tools deployed downhole in a well are often assembled or joined in a tool string comprising multiple tools, such as driving tools for driving the tool string forward in inclining sections of the well and/or operational tools for performing various operations downhole.
  • Such pipe couplings may provide a fluid-tight coupling between pipe sections and may also comprise an electrical coupling for transferring electrical power.
  • known couplings do not provide the necessary connections for connecting advanced tools and tool parts.
  • Present downhole tools such as a downhole tractor, require a supply of both electrical power and hydraulic fluid in order to operate. A need has therefore arisen for a coupling between different tool sting parts wherein both fluid and electrical power can be transferred.
  • Some downhole tool may require several separate fluid channels running between different parts of the tool string.
  • the coupling has to be robust and capable of withstanding considerable tensile forces and twisting during deployment downhole. At the same time, the coupling has to be relatively easy and fast to assemble.
  • a tool string for being suspended in a well the tool string extending in a longitudinal direction and comprising: a first string part and a second string part, each having a centre axis and comprising; an electrical connection in a first end, and a fluid channel extending at least partly through the string part.
  • the tool string further comprising a connecting element rotatably connected to one string part and adapted to be threadably connected to a threaded portion of the other string part, to join the electrical connections of the first and second string parts; wherein one of the string parts comprises a pipe connection extending in the longitudinal direction from the first end and into the fluid channel of the other string part, when the string parts are mutually connected by the connecting element, the pipe connection being arranged eccentrically in relation to the centre axis for preventing mutual rotation of the string parts.
  • connection for transferring both electrical power and fluid between two string parts of a tool string.
  • the connection has the necessary rigidity to provide and maintain a fluid-tight seal between the fluid channels of the first and second string parts. Furthermore, the electrical wires are not twisted or bent.
  • one of the string parts may comprise at least two pipe connections.
  • one of the string parts may comprise a guide pin and the other string part may comprise a hole for receiving the guide pin, when the string parts are mutually connected by the connecting element.
  • the connecting element may comprise two connectable collar elements adapted to be mutually connected around a section of one of the string parts.
  • the connecting element may comprise an outer threaded portion.
  • the connecting element may be arranged around a protrusion of one of the string parts having a reduced diameter compared to a maximum diameter of the string part.
  • the connecting element may be arranged in a recess of one of the string parts, whereby the connecting element is prevented from substantially moving in the longitudinal direction.
  • the connecting element may be prevented from substantially moving in the longitudinal direction towards the first end, by a protruding part of the string part having an increased outer diameter.
  • Said connecting element may have an outer diameter being equal to or less than an outer diameter of the tool string.
  • the connecting element may have an outer diameter being equal to or less than a minimum outer diameter of the tool string.
  • the pipe connection may comprise a circumferential sealing element adapted to provide a fluid-tight seal between the pipe connection and the corresponding fluid channel into which it extends.
  • one of the string parts may comprise a circumferential sealing element adapted to provide a fluid-tight seal between the first and second string parts.
  • one of the string parts may be a driving unit for propelling the tool string in the well.
  • the present invention furthermore relates to a method for assembling two string parts of a tool string, the method comprising the steps of:
  • Fig. 1 shows a tool string 1 being suspended in a well 4 from a wire line 5.
  • the tool string 1 may also be suspended using coiled tubing or by being part of a drill string.
  • the shown well comprises a casing 6, but the tool string 1 may also be used in an uncased well.
  • the tool string 1 extends in a longitudinal direction and comprises at least a first tool string part 2 and a second tool string part 3.
  • a first end 200 of the first string part 2 and a first end 400 of the second string part 3 are connected via a connecting element 6 arranged between the two string parts 2, 3 in the longitudinal direction.
  • the dotted lines in Fig. 1 illustrate how part of the first end 200 of the first string part extends through the connecting element 6 and into the first end 400 of the second string part.
  • FIG. 2 a connection shown in Fig. 1 between the first string part 2 and the second string part 3 will be described in further detail below.
  • the connecting element 6 and part of the second string part 3 has been cut through and are shown in a cross-sectional view.
  • the string parts 2, 3 and the connecting element 6 each have a circular cross-section.
  • the first string part 2 comprises a protrusion 27 having a reduced diameter 37b.
  • the protrusion 27 extends between a face 39 of the first string part and a protrusion end face 201.
  • the protrusion 27 comprises a circumferential projecting flange 29. Together with the face 39, the projecting flange 29 defines a recess 28 encircling the protrusion 27.
  • a plurality of pipe connections 22, 23, 24 and a guide pin 26 extend.
  • a plug 21 is provided in the end face 201 and a circumferential seal 33 is arranged around the protrusion 27 adjacent the end face 201.
  • Each of the pipe connections extends in the longitudinal direction 10 from the end face 201 towards a tapered free end.
  • a circumferential seal 30, 31 are arranged around each of the pipe connections.
  • the guide pin 26 also extends in the longitudinal direction from the end face 201 towards a tapered free end.
  • the connecting element 6 is provided in the recess 28.
  • the connecting element 6 is comprised by two connectable collar elements 601, 602 as shown in Fig. 4 .
  • the two collar elements 601, 602 are arranged in the recess 28 around the projection 27 and connected by bolts 62.
  • the connecting element 6 is thereby rotatably connected to the first string part 2 and restricted from moving in the longitudinal direction by the face 39 and the projecting flange 29.
  • the connecting element 6 comprises an outer threaded portion 61 adapted to be connected to a threaded portion 48 of the second string part 3, as shown in Fig. 2 . It is obvious to the person skilled in the art that the connecting element may be designed in a number of other ways without departing from the essence of the invention.
  • the second string part 3 comprises a bore 47 adapted to receive the protrusion 27 of the first string part 2 and the connecting element 6.
  • the bore is encircled by a threaded portion 48 of the second string part 3 adapted to be connected to the threaded portion 61 of the connecting element 6.
  • the bore 47 is delimited by a face 401 comprising a plurality of holes 42, 43, 44 adapted to receive the pipe connections 22, 23, 24, as shown in Figs. 3a and 3b .
  • the face 401 further comprises a hole 46 adapted to receive the guide pin 26, and a socket 41 adapted to be connected to the plug 21, as shown in Fig. 3a and Fig. 3b .
  • FIG. 3a An approximated layout of the protruding pipe connections 22, 23, 24, guide pin 26 and plug 21 is shown in Fig. 3a , and a layout of the matching holes 42, 43, 44 and socket 41 is shown in Fig. 3b .
  • the pipe connections 22, 23, 24 are fluidly connected to respective fluid channels 220, 240 in the first string part and the holes 42, 43, 44 are in fluid communication with respective fluid channels 420, 440 in the second string part 3.
  • the fluid channels 220, 240 of the first string part is brought into fluid communication with the fluid channels of the second string part.
  • the plug 21 and the socket 41 provide an electrical connection between the first and second string parts.
  • the pipe connections 22, 23, 24 of the first string part 2 and the respective holes 42, 43, 44 in the second string part 4 are arranged eccentrically in relation to a centre axis 10.
  • the first and second string parts 2, 3 are prevented from mutual rotation.
  • the one or more pipe connections thus have the additional functionality of fixating the string parts in relation to one another, both during assembly of the string parts and use of the tool string downhole.
  • the guide pin 26 extends further away from the end face 201 than the pipe connections. During assembly of the first and second string parts, the guide pin 26 is thus inserted into the hole 46 to control the assembly process and prevent damage caused by the string parts being rotated or angled in relation to one another. The plug and socket and the pipe connections may be bent or destroyed if the string parts are not arranged in parallel. When the guide pin 26 is at least partially arranged in the hole 46, the two string parts are kept substantially parallel relative to each other. By having a guide pin, the first and second string parts are prevented from tilting slightly in the connection therebetween.
  • the pipe connections may be integral parts of one of the string parts or they may separate pipes.
  • One pipe connection may be arranged in one string part and another pipe connection in the other, in order that when joining the string parts, the pipe connections function as guides during the assembly process.
  • the connecting element 6 is arranged in the recess of the first string part and in Fig. 2 , the first string part 2 also comprises the pipe connection and the pin. However, the connecting element 6 may be arranged in the recess of the first string part, and the pipe connection and the pin may be arranged in the second string part 3.
  • Fig. 5 shows a downhole tractor 81 being part of a tool string 1, wherein two string elements 2, 3 are assembled using the connecting element 6 described above.
  • the downhole tractor is suspended from and powered through a wire line 5 connected with the downhole tractor through a top connector 71.
  • the downhole tractor 81 comprises an electronics section 72, an electrical motor 73, a hydraulic pump 74 and two wheel sections 80 driven by hydraulics.
  • the wheel sections are in fluid communication with the hydraulic pump 74 and may also be denoted as driving units 80 for propelling the downhole tractor and the tool string in the well.
  • the downhole tractor may be connected to one or more operational downhole tools 75, also being part of the tool string 1.
  • Such operational tools could be a stroker tool providing an axial force in one or more strokes, a key tool opening or closing valves in the well, positioning tools such as a casing collar locator (CCL), a milling tool, a drilling tool, etc.
  • CCL casing collar locator
  • connection between two string parts 2, 3, e.g. two wheel sections 80 of a downhole tractor may be used for transferring fluid(s) and/or electrical power. Electrical power may be transferred from the wire line 5 to the first string part and via the plug 21 and socket 41 to the subsequent string part.
  • the pipe connection 22 may be used for connecting fluid channels providing a pressurised fluid from the hydraulic pump 74 to the wheel sections, for projecting, pivotally mounted wheel arms 76.
  • the pipe connection 24 may be used for connecting fluid channels providing a pressurised fluid from the hydraulic pump 74 to the wheel sections, for rotating wheels 77 mounted at the wheel arms 76 in a clockwise direction.
  • the pipe connection 23 may be used for connecting fluid channels providing a pressurised fluid from the hydraulic pump 74 to the wheel sections, for rotating wheels 77 mounted at the wheel arms 76 in a counterclockwise direction.
  • the pipe connection 25 may be used for connecting fluid channels providing a return channel for fluid supplied to the wheel sections.
  • fluid or well fluid any kind of fluid that may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • a casing any kind of pipe, tubing, tubular, liner, string etc. used downhole in relation to oil or natural gas production.
  • a downhole tractor can be used to push the tools all the way into position in the well.
  • a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Catching Or Destruction (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
  • Electric Cable Installation (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP11164298A 2011-04-29 2011-04-29 Chaîne d'outil Withdrawn EP2518257A1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP11164298A EP2518257A1 (fr) 2011-04-29 2011-04-29 Chaîne d'outil
CA2834476A CA2834476A1 (fr) 2011-04-29 2012-04-27 Train de tiges d'outils
MX2013012437A MX336468B (es) 2011-04-29 2012-04-27 Columna de herramientas.
RU2013152080/03A RU2591863C2 (ru) 2011-04-29 2012-04-27 Инструментальная колонна
CN201280021013.6A CN103502559A (zh) 2011-04-29 2012-04-27 工具管柱
AU2012247463A AU2012247463B2 (en) 2011-04-29 2012-04-27 A tool string
BR112013027370A BR112013027370A2 (pt) 2011-04-29 2012-04-27 coluna de ferramenta
US14/114,629 US20140076582A1 (en) 2011-04-29 2012-04-27 Tool string
MYPI2013003844A MY166745A (en) 2011-04-29 2012-04-27 A tool string
PCT/EP2012/057802 WO2012146732A1 (fr) 2011-04-29 2012-04-27 Train de tiges d'outils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11164298A EP2518257A1 (fr) 2011-04-29 2011-04-29 Chaîne d'outil

Publications (1)

Publication Number Publication Date
EP2518257A1 true EP2518257A1 (fr) 2012-10-31

Family

ID=44454758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11164298A Withdrawn EP2518257A1 (fr) 2011-04-29 2011-04-29 Chaîne d'outil

Country Status (10)

Country Link
US (1) US20140076582A1 (fr)
EP (1) EP2518257A1 (fr)
CN (1) CN103502559A (fr)
AU (1) AU2012247463B2 (fr)
BR (1) BR112013027370A2 (fr)
CA (1) CA2834476A1 (fr)
MX (1) MX336468B (fr)
MY (1) MY166745A (fr)
RU (1) RU2591863C2 (fr)
WO (1) WO2012146732A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111630245B (zh) * 2018-02-02 2022-04-12 海德里美国分销有限责任公司 用于螺纹立管辅助管线的系统和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070275585A1 (en) * 2003-10-09 2007-11-29 Neil Griffiths Method for Interconnecting Electrical Conduits in a Borehole
US20090195250A1 (en) * 2006-06-09 2009-08-06 Halliburton Energy Services, Inc. Measurement while drilling tool with interconnect assembly
US20090229817A1 (en) * 2005-06-15 2009-09-17 Ashers Partouche Modular connector and method
WO2010122342A1 (fr) * 2009-04-22 2010-10-28 Artificial Lift Company Limited Connecteur électrique humide utilisé dans un environnement de fond de trou

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871734A (en) * 1974-02-25 1975-03-18 Delbert Lyle Murtland Electrical conducting fluid tight tubular assembly
US3945700A (en) * 1974-08-06 1976-03-23 Boston Insulated Wire & Cable Co. Connector with fluid-resistant sleeve assembly
US4583804A (en) * 1984-05-21 1986-04-22 Richard Thompson Electric feedthrough system
US4708201A (en) * 1984-10-29 1987-11-24 Reed Lehman T Top entry electrical transmission assembly for submersible pumping
US4616855A (en) * 1984-10-29 1986-10-14 Ruhle James L Threadless nonrotating steel coupling system
US4836305A (en) * 1985-05-06 1989-06-06 Pangaea Enterprises, Inc. Drill pipes and casings utilizing multi-conduit tubulars
US4723230A (en) * 1986-08-13 1988-02-02 Bolt Technology Corporation High ambient liquid pressure-resistant electrical connector
US5051103A (en) * 1990-10-09 1991-09-24 Hubbell Incorporated Electrical coupling assembly for hot, high pressure service
US5286220A (en) * 1991-11-18 1994-02-15 Camco International, Inc. Electrical cable connector
RU2194839C2 (ru) * 2000-06-27 2002-12-20 Закрытое акционерное общество "АСНОВ Д.Н." Долотный нагружающий комплекс
US6666274B2 (en) * 2002-05-15 2003-12-23 Sunstone Corporation Tubing containing electrical wiring insert
US7549849B2 (en) * 2005-02-23 2009-06-23 Schlumberger Technology Corporation Tandem motors
US7726396B2 (en) * 2007-07-27 2010-06-01 Schlumberger Technology Corporation Field joint for a downhole tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070275585A1 (en) * 2003-10-09 2007-11-29 Neil Griffiths Method for Interconnecting Electrical Conduits in a Borehole
US20090229817A1 (en) * 2005-06-15 2009-09-17 Ashers Partouche Modular connector and method
US20090195250A1 (en) * 2006-06-09 2009-08-06 Halliburton Energy Services, Inc. Measurement while drilling tool with interconnect assembly
WO2010122342A1 (fr) * 2009-04-22 2010-10-28 Artificial Lift Company Limited Connecteur électrique humide utilisé dans un environnement de fond de trou

Also Published As

Publication number Publication date
AU2012247463A1 (en) 2013-05-02
US20140076582A1 (en) 2014-03-20
MY166745A (en) 2018-07-20
MX2013012437A (es) 2013-12-02
MX336468B (es) 2016-01-20
RU2013152080A (ru) 2015-06-10
WO2012146732A1 (fr) 2012-11-01
CA2834476A1 (fr) 2012-11-01
BR112013027370A2 (pt) 2017-01-17
CN103502559A (zh) 2014-01-08
RU2591863C2 (ru) 2016-07-20
AU2012247463B2 (en) 2015-03-12

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