EP2487321B1 - Connecteur à fiches et raccord de tringlerie pour une tige de sondage - Google Patents

Connecteur à fiches et raccord de tringlerie pour une tige de sondage Download PDF

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Publication number
EP2487321B1
EP2487321B1 EP12000706.7A EP12000706A EP2487321B1 EP 2487321 B1 EP2487321 B1 EP 2487321B1 EP 12000706 A EP12000706 A EP 12000706A EP 2487321 B1 EP2487321 B1 EP 2487321B1
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EP
European Patent Office
Prior art keywords
individual rod
connection
plug
rod
connector
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.)
Active
Application number
EP12000706.7A
Other languages
German (de)
English (en)
Other versions
EP2487321A3 (fr
EP2487321A2 (fr
Inventor
Sebastian Fischer
Raimund Grobbel
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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 Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Publication of EP2487321A2 publication Critical patent/EP2487321A2/fr
Publication of EP2487321A3 publication Critical patent/EP2487321A3/fr
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Publication of EP2487321B1 publication Critical patent/EP2487321B1/fr
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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/002—Drilling with diversely driven shafts extending into 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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
    • E21B17/0285—Electrical or electro-magnetic connections characterised by electrically insulating elements

Definitions

  • the invention relates to a connector for connecting two rod sections of a drill pipe and a corresponding rod section.
  • a drill head When rod-based drilling in the ground, in particular for the production of so-called horizontal bores, which extend substantially parallel or at a relatively low inclination angle to the earth's surface, a drill head is driven by means of a drill string from a arranged on the earth's surface or in a pit drive device.
  • the drill pipe used in this case consist of individual, interconnected rod sections, which - according to the course of drilling - gradually attached to the rear end of the already drilled drill string and connected to this. For this purpose usually threaded connections are used.
  • Soft soil drilling is usually based on radial displacement and compaction of the soil.
  • the drill head is therefore - if ever - regularly only - in addition to the static feed - driven at low speed rotating.
  • a first of these designs relies on the use of an in-hole motor that rotates the drill head directly rather than rotating about the drill string. Rather, the unit of drill head and in-hole motor is fixed to the front of the drill pipe, via which the required axial pressure is applied to drive the bore. Since the drilling required for the drilling of the drill head is generated by the in-hole motor, it is not necessary in such drilling devices to drive the drill pipe itself rotating. The wear of the drill string is therefore relatively low.
  • so-called "mud motors" are regularly used, in which a drive fluid is passed under high pressure through a turbine in order to effect the rotation.
  • This propulsion fluid is usually a drilling fluid which, after passing through the mud engine, exits through holes in the area of the drill head into the bore to cool and lubricate the drill head and around the cleared cuttings over the annulus between the borehole wall and the drill pipe.
  • Significant drawbacks of such in-hole engine based rock drilling rigs are the high drilling fluid consumption coupled with low performance (e.g., 800Nm with a purge fluid consumption of 320 RPM).
  • the second common design for rock drilling equipment is based on the use of a double drill pipe.
  • the drill head is additionally rotatably driven via an inner linkage of the double drill pipe from the drive device arranged on the earth's surface or in an excavation, which also provides for the advance of the drill head.
  • the inner rod is rotatably mounted within an outer linkage of the DoppelbohrgestCodes.
  • the outer linkage therefore either does not have to be rotated at all or only at a low speed. Even with such rock drilling device, the wear of the drill string is limited, because the standing in contact with the rocky bore wall outer linkage does not rotate or only at low speed, while the driven at a high speed inner linkage can be mounted wear-reducing in the outer rod.
  • the invention is based on the idea of specifying a way to connect two rod sections of a drill pipe, the advantages of the Known prior art threaded connections and the Axialsteckitatien combined.
  • a connector which - similar to a threaded connection - based on helical on a cross-sectionally circular threaded connector or in a corresponding threaded bushing projections / grooves, wherein the projections / grooves are designed so that the characteristic of a threaded connection Self-locking does not occur.
  • a plug-in connection according to the invention for connecting two rod sections of a drill string accordingly has a connection plug at one end of a first of the rod sections and a connection socket at one end of the second of the rod sections, wherein the connection plug and the connection socket are characterized in that each at least one (n) have spirally extending (s),shemmuns carti configured (s) guide projection and / or guide groove which engage in the joining of the connector.
  • the guide In order to avoid a self-locking of the guide, it is preferably provided to carry out the spiral course with a very large pitch, preferably in the range of 15 ° to 25 ° relative to the longitudinal axis.
  • the contact surfaces, over which the guide projections or guide grooves of the connector plug or the connecting sleeve abut each other, are largely aligned radially, i. a straight line laid on the contact surface in a direction perpendicular to the longitudinal axis of the plug-in connection at a (random) point points essentially in the direction of this longitudinal axis.
  • the jamming of the thread flanks which is known from most threaded connections, can be avoided by a radial deformation of the connecting parts as a result of radial force components caused by the geometry of the thread flanks.
  • the guide projections In a cross section selected perpendicular to the longitudinal axis of the plug connection, the guide projections preferably have a rectangular or trapezoidal cross section.
  • the essential design criterion is preferably the pitch of the helical course of the guide projections / guide grooves, which are preferably chosen to be so large is that - even when using usual for drill pipe materials, especially steel, and achievable without significant post-processing of the contact surface surface quality - the connector according to the invention can also be joined exclusively by the application of compressive forces (which of course associated with a relative rotation of the two connecting parts is).
  • a connector according to the invention but also always be joined by the exclusive application of torque, since the relative axial displacement is then - as in a threaded connection - forced by the spiral guide projections / guide grooves.
  • the main advantages of the connector according to the invention are that it simply - like the already known Axialsteckitati - by the application of only axial forces (compressive or tensile forces in the direction of the longitudinal axis of the connector) joined and - because of the lack of self-locking - again (if necessary manually) can be solved.
  • the use of a mechanical release device, as required for screw, can therefore be omitted.
  • the helical formation of the guide projections / guide grooves causes the connectors to fix automatically as long as a torque (in the joining direction) is transmitted via the drill string.
  • a secure cohesion of the individual rod sections of the drill string can be achieved when acting on these tensile forces, for example when retracting the drill string.
  • the connector plug and / or the connection socket has a conical insertion section, by which a lack of coaxiality of the two connection parts is corrected during mating.
  • a mechanical mating of the connecting parts of the connector according to the invention can be simplified.
  • a seal can be provided which seals a ring space formed between the connection plug and the connection socket in the assembled state of the plug connection.
  • a seal can avoid contamination of the contact surfaces of the connecting parts, for example by a drilling fluid entering through the annular space.
  • An inventive rod assembly for a drill string has a rod end body, the two ends each comprise a connecting part of a connector according to the invention. Accordingly, the rod assembly main body at a (longitudinal axial) end of a connector of an inventive Plug connection and at the corresponding other end a connection socket of a plug connection according to the invention.
  • Such a rod assembly according to the invention can preferably be used as an inner rod assembly of a double rod assembly according to the invention for a double drill rod, wherein the double rod assembly additionally comprises an outer rod assembly which surrounds the inner rod assembly.
  • the rod assembly according to the invention may further comprise at least one cylindrical bearing seat for receiving a bearing ring.
  • This bearing seat can preferably receive a rotary bearing over which the rod assembly according to the invention, if this is provided as mecanicgestfiteschuss a double rod section, is mounted in the outer rod assembly.
  • annular space can be provided, which can be preferably used for the transport of a drilling fluid.
  • This annular space is at least partially closed by the rotary bearing, whereby the transport of the drilling fluid can be hindered.
  • the bearing seat of the (inner) linkage of the invention is traversed by at least one channel (in the longitudinal axial direction).
  • This signal line section can be, for example, an (electrically insulated) cable.
  • an electrically conductive (kink-resistant) rod is suitable, provided that it is electrically insulated from the rod end body, the connector and the connector socket.
  • the two ends of the signal line are also provided with a coupling part which allows a connection with a corresponding connection part of a signal line section of a second linkage to be connected to the first linkage.
  • these coupling parts are designed as Axialsteckitati, so that they can be connected to each other automatically when connecting the two rod sections.
  • the signal line should be axially supported at least in the region of the coupling parts in the rod section.
  • connection of the outer rod sections of two double-rod sections according to the invention to be connected takes place via a screw connection, for which purpose each outer rod section has a threaded connector at one of the (longitudinal-axial) ends and a corresponding threaded socket at the other end.
  • a screw connection for which purpose each outer rod section has a threaded connector at one of the (longitudinal-axial) ends and a corresponding threaded socket at the other end.
  • the Fig. 1 shows in cross-section two interconnected ends of double rod sections 1 according to the invention a Doppelbohrgestfites.
  • Each of the double rod sections 1 comprises an outer linkage 2 and an inner linkage 3 arranged centrally therein.
  • Each of the outer rod sections 2 is provided at one of its ends with a conical external thread and at the opposite end with a corresponding conical internal thread to form a threaded connection 4. About these threaded parts, the individual outer rod sections 2 are screwed together. The concrete form of this used for use thread and this thread having sections of the rod sections is in the DE 10 2008 047 060 A1 described.
  • each of the inner rod sections 3 at one of his Ends a connector 5, which is provided with helically extending guide projections 6 (see. Fig. 3 ), between which correspondingly shaped guide grooves 7 are formed.
  • the guide projections 6 of the connector 5 cooperate in the mated state of the connector with the corresponding guide projections 8 a connecting sleeve 9 of the adjacent réellegestlindeschusses together, ie they engage in the guide grooves formed by these. Due to the helical course of the guide projections 6, 8, the mating movement combines both an axial relative displacement and a relative rotation of the two connecting parts (connecting plug 5 and connecting bush 9) to each other.
  • the course of the spiral guide projections 6, 8 is provided with a very large pitch.
  • each of the guide projections 6, 8 over the entire length of the guide projections receiving portion of the connector or the connecting sleeve winds around only about 70 ° about the longitudinal axis.
  • the guide projections 6, 8 would thus - have a rectangular cross section - without the twist caused by the spiral course.
  • these design features large pitch, radial orientation of the contact surfaces 10
  • the connector 5 is frontally provided with a reduced diameter in its insertion section 11 by having a smaller outer diameter than the other portions of the inner rod.
  • the insertion section 11 of the connector is also provided with two conical sections 12, 13. In conjunction with a conical insertion section 14 of the connecting bushing 9 can be achieved by the insertion section 11 of the connector 5 a secure mating of the connector even if the two connecting parts are not recognized in exactly coaxial alignment with each other.
  • the psychologygestfiteschadore 3 are hollow and thus formed as RohrgestCodeschadore.
  • a signal line section 15 formed from a solid (metal) wire is arranged centrally and held in this position (also in the axial direction) via bearings (not shown) which are designed to be electrically insulating.
  • Each of these signal line sections 15 has at one of its ends a plug 16 and at the corresponding other a socket 17 for forming an axial plug connection.
  • Each of the inner rod sections 3 is rotatably supported by a sliding bearing ring 18 in the corresponding outer rod section 2.
  • each of the inner rod sections 3 in the region of the connector 5 has a cylindrical bearing surface 19 for receiving an inner ring of the sliding bearing ring 18.
  • the bearing surface 19 is limited to one side by a shoulder 20, which serves as an axial stop for the sliding bearing ring 18.
  • the slide bearing ring 18 is connected by shrinking with the mecanicgestlindeschuss 3 (non-positively).
  • the inside of each of the outer rod sections 2 has a corresponding bearing surface, which is in contact with an outer ring of the sliding bearing ring 18. Also, this bearing surface is bounded on one side by a shoulder 21, which in turn serves as (first) axial stop for the sliding bearing ring 18.
  • a second axial stop is formed by a snap ring 22, which engages in a corresponding groove on the inside of the outer rod section 2.
  • the bearing of the sliding bearing ring 18 in the outer rod assembly 2 takes place with play, so that a simple assembly and disassembly (for example, for maintenance purposes) of the sliding bearing ring 18 and the associated mecanicestlindeschusses 3 is possible.
  • only the snap ring 22 has to be removed and the (only via the one slide bearing ring mounted) réellegestfiteschuss 3 are pulled out of the outer linkage 2.
  • annular space 23 is formed, through which a drilling fluid is to be transported.
  • this annular space 23 is (at least partially) blocked, so that a total of three channels 24 are provided for the transport of the drilling fluid, which are integrated into the wall of the réellegestfiteschusses 2 and the bearing surface 19 and thus under the slide bearing ring 18 in the longitudinal axial direction, as can be seen in particular from Fig. 2 and 3 results.
  • the threaded connections and the connectors of the inner linkage each with a seal 26, 27 provided in the form of commercially available O-rings, which is positioned in corresponding grooves of the threaded or connector plug 5.

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  • 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)
  • Earth Drilling (AREA)

Claims (15)

  1. Connecteur à fiche pour la connexion de deux tronçons de tige d'une tige de soudage avec une fiche de connexion (5) à une extrémité d'un premier tronçon de tige et un connecteur (9) à une extrémité du deuxième tronçon de tige, caractérisé en ce que la fiche de connexion (5) et le connecteur (9) présentent des prolongements de guidage (6, 8) et/ou des rainures de guidage (7) s'étendant en spirale et s'emboîtant l'une dans l'autre et réalisés de manière non-autobloquantes.
  2. Connecteur à fiche selon la revendication 1, caractérisé en ce que les prolongements de guidage (6, 8) et/ou les rainures de guidage (7) présentent des surfaces de contact (10) orientées essentiellement radialement.
  3. Connecteur à fiche selon la revendication 1 ou 2, caractérisé en ce que la fiche de connexion (5) et/ou le connecteur (9) présentent une section d'insertion (11, 14) réalisée au moins en partie de manière conique.
  4. Connecteur à fiche selon l'une quelconque des revendications 1 à 3 caractérisé en ce qu'un joint (12) étanche une fente annulaire entre la fiche de connexion (5) et le connecteur (9) dans l'état enfiché du connecteur à fiche.
  5. Tronçon de tige pour une tige de soudage avec un corps de base de tronçon de tige caractérisé en ce que le corps de base de tronçon de tige présente une fiche de connexion (5) à une extrémité dans l'axe longitudinal selon l'une des revendications précédentes et un connecteur (9) à l'autre extrémité selon l'une des revendications précédentes.
  6. Tronçon de tige selon la revendication 5 caractérisé en une surface porteuse cylindrique (19) pour le logement d'un anneau d'appui.
  7. Tronçon de tige selon la revendication 6 caractérisé en au moins un canal (24) passant en dessous de la surface porteuse (19) dans la direction de l'axe longitudinal du tronçon de tige.
  8. Tronçon de tige selon l'une quelconque des revendications 5 à 7, caractérisé en une section de ligne de signalisation (15) guidée à l'intérieur du corps de base de tronçon de tige, de la fiche de connexion (5) et du connecteur (9).
  9. Tronçon de tige selon la revendication 8, caractérisé en ce que les deux extrémités de la section de ligne de signalisation (15) sont prévues avec respectivement une pièce d'accouplement pour la jonction avec une pièce de raccord correspondante d'une section de ligne de signalisation (15) d'un deuxième tronçon de tige.
  10. Tronçon de tige selon la revendication 9, caractérisé en ce que les deux pièces d'accouplement sont formées comme des connecteurs à fiche axiaux.
  11. Tronçon de tige selon l'une quelconque des revendications 8 à 10, caractérisé en ce que la section de ligne de signalisation (15) est soutenue axialement.
  12. Tronçon de tige double pour une tige de soudage double avec un tronçon de tige extérieur (2) et un tronçon de tige intérieur (3) disposé à l'intérieur du tronçon de tige extérieur (2) selon l'une quelconque des revendications 5 à 11.
  13. Tronçon de tige double selon la revendication 12, caractérisé en ce que le tronçon de tige intérieur (3) coulisse dans le tronçon de tige extérieur (2) sur au moins un palier de rotation.
  14. Tronçon de tige double selon la revendication 12 ou 13, caractérisé en ce que le logement du tronçon de tige intérieur (3) est fixé dans le tronçon de tige extérieur (2) pour éviter tout déplacement axial.
  15. Tronçon de tige double selon l'une quelconque des revendications 12 à 14, caractérisé en ce que le tronçon de tige extérieur (2) présente un filetage mâle à l'une des extrémités dans l'axe longitudinal et un filetage femelle correspondant à l'autre extrémité.
EP12000706.7A 2011-02-10 2012-02-02 Connecteur à fiches et raccord de tringlerie pour une tige de sondage Active EP2487321B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011010958A DE102011010958A1 (de) 2011-02-10 2011-02-10 Steckverbindung und Gestängeschuss für Bohrgestänge

Publications (3)

Publication Number Publication Date
EP2487321A2 EP2487321A2 (fr) 2012-08-15
EP2487321A3 EP2487321A3 (fr) 2016-04-06
EP2487321B1 true EP2487321B1 (fr) 2018-11-21

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Application Number Title Priority Date Filing Date
EP12000706.7A Active EP2487321B1 (fr) 2011-02-10 2012-02-02 Connecteur à fiches et raccord de tringlerie pour une tige de sondage

Country Status (3)

Country Link
US (1) US9290992B2 (fr)
EP (1) EP2487321B1 (fr)
DE (1) DE102011010958A1 (fr)

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DE102014018102A1 (de) * 2014-12-05 2016-06-09 Tracto-Technik Gmbh & Co. Kg "Bohrgestänge, Verbindungssystem, Erdbohrvorrichtung und Verfahren zum Verbinden eines Bohrgestängeschusses"
US10941651B2 (en) * 2017-05-01 2021-03-09 U-Target Energy Ltd. Downhole telemetry system and method therefor
DE102018004951A1 (de) 2018-06-22 2019-12-24 Tracto-Technik Gmbh & Co. Kg Verbindung zweier Bohrstrangglieder eines Bohrstrangs zum Erdbohren
DE102018008533A1 (de) 2018-10-31 2020-04-30 Tracto-Technik Gmbh & Co. Kg Gestängeschuss eines Erdbohrgestänges
US11286725B2 (en) 2020-03-18 2022-03-29 Saudi Arabian Oil Company Drill pipe segments for logging operations
US11274549B2 (en) 2020-03-18 2022-03-15 Saudi Arabian Oil Company Logging operations in oil and gas applications
DE102020005727A1 (de) 2020-09-18 2022-03-24 Tracto-Technik Gmbh & Co. Kg Gestängeschuss eines Erdbohrgestänges
DE102020005982A1 (de) 2020-09-30 2022-03-31 Tracto-Technik Gmbh & Co. Kg Gestängeschuss eines Erdbohrgestänges, Antriebselement, Gestängeschusssystem und Erdbohrvorrichtung
EP4086426A1 (fr) 2021-05-03 2022-11-09 TRACTO-TECHNIK GmbH & Co. KG Accouplement de tiges d'une tige de tarière
WO2023017481A1 (fr) * 2021-08-13 2023-02-16 Gradidge, Robert Charles Raccord d'acier de forage, tige et maîtresse-tige les comprenant
US11905791B2 (en) 2021-08-18 2024-02-20 Saudi Arabian Oil Company Float valve for drilling and workover operations
US11913298B2 (en) 2021-10-25 2024-02-27 Saudi Arabian Oil Company Downhole milling system

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Also Published As

Publication number Publication date
US20120205908A1 (en) 2012-08-16
EP2487321A3 (fr) 2016-04-06
EP2487321A2 (fr) 2012-08-15
DE102011010958A1 (de) 2012-08-16
US9290992B2 (en) 2016-03-22

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