EP2440737A2 - Device for connecting electrical lines for boring and production installations - Google Patents

Device for connecting electrical lines for boring and production installations

Info

Publication number
EP2440737A2
EP2440737A2 EP20100730031 EP10730031A EP2440737A2 EP 2440737 A2 EP2440737 A2 EP 2440737A2 EP 20100730031 EP20100730031 EP 20100730031 EP 10730031 A EP10730031 A EP 10730031A EP 2440737 A2 EP2440737 A2 EP 2440737A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
ring
characterized
device according
pin
contact
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.)
Granted
Application number
EP20100730031
Other languages
German (de)
French (fr)
Other versions
EP2440737B1 (en )
Inventor
Anton Scheibelmasser
Abdelrhani Lamik
Bouchra Lamik-Thonhauser
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.)
THINK AND VISION GMBH
Original Assignee
Advanced Drilling Solutions GmbH
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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors, or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/18Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods ; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/028Electrical or electro-magnetic connections
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00-H01R33/00
    • H01R13/62Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/622Screw-ring or screw-casing

Abstract

The invention relates to a device for connecting two electrical lines to essentially tubular connecting elements (1, 2) of drill pipes (32), that are screwed together. Said device is characterised in that a first electrical contact element (10) is arranged on one connecting element (1) in such a way that it can move in the rotary direction of the connecting element (1), and a second electrical contact element (23) is fixed to the other connecting element (2).

Description

Device for connecting electric lines for drilling and Produktionsanlaqen

The invention relates to a device for connecting electrical cables to be screwed together, substantially tubular connecting elements of drill pipes.

A key element in modern oil, gas and geothermal drilling is the data acquisition during drilling. The same is true also for the construction of the well and the subsequent oil, gas and hot water production. Only by capturing the respective relevant variables a hole can be operated mixed safely, efficiently and economically. However, a problem arises with the Echzeitdatenübertragung of measurement data to the surface of the rig. From several kilometers depth data at a high data rate (eg 200kBaud) to be transferred.

Currently, steel radiators are used without wiring of drilling rigs in part. The tubes are (for example 9 meters) screwed at regular intervals. In this way, rises a several-kilometer-long drill pipe, at the end of the drill bit is. Inside the tubes, the rinsing fluid (mud) is satisfied, the many functions during drilling. One of these functions is known in the art, the transmission of data by means of pressure pulses. Since this communication is very slow (eg 10 baud) were increasingly sought methods that other transmission mechanisms use (sonar, flows through the soil, etc.). Most efficiently, solutions have shown which are connected to a wiring of the drill string (electricity, light, etc.). Once the drill string is connected by means of electrical cable or conductive layers, a high-speed data transmission is possible.

Two methods are possible in principle. Some prototypes work with galvanic connections between the individual tubes of the boom. Partial commercially available systems use a magnetic coupling between the pipes. The currently used magnetic coupling allows only the data transmission.

The intention to wire a drillstring comes to multiple problems.

Steel pipes have to be manufactured with heat-resistant, Mud resistant, pressure-resistant cables or retrofitted without the carrying capacity of the drill string influenced and the staff during the screwing of the pipes is impeded.

To enable data transfer in the drill string has the problem of electrical

Connection between the pipes to be solved. The electrical connection must be reliable, simple and robust made in the mechanical connection of the tubes (twisting motion) manufacturers. The biggest challenge to make an electrical connection is established, may transfer the power and / or data, which screwing movement is during only fasten the individual drill string environment process (pipes). In addition, the drilling, high pollution and all types of liquids, a harsh environment. This challenge to be overcome in order to develop a successful, operational system.

This object is achieved in a device of the type mentioned above in that in a connecting element a first electrical contact element is fixed and that a second electrical contact element in the direction of rotation of the connecting element is displaceably disposed on the other connecting element.

The construction solves the problem that two components of movement to occur during the screwing of the two connecting members, namely, a circumferential and an axial direction in the connecting elements. Due to the fact that one of the two contact element in circumferential direction is movable, it can rotate with the other connecting element in the production of electrical or galvanic connections between the two contact element, so that the two connecting elements are connected to each other only through the axial movement component have to.

In a preferred embodiment of the invention, the movable contact element is arranged on a rotatably arranged on the connecting element ring, the ring is preferably an outer ring of a slip ring. Slip rings are in electrical proven and robust components that can also be used in the present case, to compensate for the rotating movement component during the connection of the two connecting elements.

The solution presented is suitable for a data and power transmission in the drill string based on wired pipes (for example, steel or carbon fiber reinforced plastic or FRP pipes) whose wiring is electrically connected at the tube ends.

The wiring can be carried out with a two-wire, heat-resistant voltage supply cable, which in a protective tube (chemical resistance) is laid. On the surface, both electrical power and data can be fed into this cable. In the case of the rotating drill string, this is done with slip rings. In the pipe, this cable is directed to a connecting element which establishes a good conductive connection to the next tube.

For the supply of energy preferably DC voltage can be used in the mains voltage range. The adaptation to all possible distribution networks is done once centrally before feeding.

In addition to data communication, the problem of power supply of the data may occur transmission elements (modem, repeaters, transceivers, etc.). Since the drill string _ O _

can be several kilometers long (eg 20 km) is the problem of data transmission over long lines to solve. High speed data transfers (eg fieldbus systems) can only be used for some 100 meters without repeaters. but the use of many Repeatem requires an adequate power supply. but this is problematic due to the voltage drops over long distances and many repeaters. Although the installation of batteries in the repeater solves the problem of energy transfer, but leads to poor unmaintainable, unreliable systems (battery replacement, battery failure). Quite problematic is also the installation of repeaters in the drill due to the lack of space.

To solve the problem, it is proposed in the invention that the electric lines, a power-line communication is connected.

For the feeding of the data using a power-line communication, a narrow-band OFDM can (orthogonal frequency divison multiplexed, multi-carrier) can be used methods. This process is also known as "Power Line Communication (PLC)". Modems use this technique currently used in electric power networks for remote maintenance or remote meter reading (Distributed Line Communication, DLC). Is successful in over conventional power lines without additional cabling information for several kilometers without repeaters with data rates of several hundred Kilobaud exchange.

With such a modem, the data is modulated onto the power supply in a plurality of carrier frequencies, is fed with slip rings in the drill string and transmitted in the rotating drill string by the connecting elements at the pipe ends to the receiving point (consumer electronic measuring system) in the borehole. Several such modems can receive not only energy but also data by the connected power supply or send.

Advantages of this solve problems include the fact that modulation is required no separate wiring for data communication by using the PLC. This solution is therefore economically. no repeaters are necessary for the desired Bohrstranglänge (about 20km), which solves space and energy problems. Since no separate data cabling is necessary, no need for additional electrical contacts on the pipe joints. Since no repeaters are needed, the necessary amount of energy is reduced so that an economic choice of the required conductor cross section (eg 4-6mm 2) a mains voltage (eg 400V) is sufficient to provide the required energy (for example, 200W) to a 20km to bring distant consumers.

The presence of a permanent power supply enables the cooling of electronic systems in the drill string and thereby enables a greater depth (Temperaturko- efficiently in the bore about 3.3 ° C / 100 m) and longer length of stay. Energy and data supply enables a range of new applications. A limitation of the supply voltage, for example 400V allows the choice of a standard cable (such as 240 / 400V), and reduces the required insulation distances in the mechanical design of the system components as compared to high-voltage systems.

Further preferred embodiments of the invention are subject of the remaining dependent claims.

Further features and advantages of the invention will become apparent from the following description of a preferred embodiment of the invention with reference to the drawings.

It shows:

Fig. 1 shows an embodiment of an inventive device in a explosionsartigen-

Illustration, FIG. 2 shows the device in an assembled state in cross section,

Fig. 3 shows a detail of the device from Fig. 2 in an enlarged scale,

Fig. 4 shows a part of the device according to the invention

Fig. 5 shows a detail from Fig. 4 in an enlarged scale,

Fig. 6 shows a farther portion of the device according to the invention, Fig. 7 another part of the apparatus of the invention

Fig. 8 shows a part of the device according to the invention in an exploded view,

Fig. 9 shows a section through a part of the inventive device,

Fig. 10 is a section through another part of the device according to the invention,

Fig. 11 is a drill pipe having a box and a pin and Fig. 12 shows a detail of the box on the drill pipe of Fig. 11.

In Fig. 1, an embodiment of a device according to the invention is shown, which serves for connecting drill pipes 32, for example drill strings for drilling rigs. The inventive device comprises a first connecting element 1, which is referred to as "pin", and a second connecting member 2, which is referred to as "Box" on. The pin 1 and the box 2 are connected on a manner not shown with drill pipes 32, which may be made for example of steel, carbon fiber or fiberglass. The inner diameter of the pin 1 and the box 2 corresponds substantially to the inner diameter of the drill pipe 32, while the outer diameter of the pin 1 and the box 2 is larger than the outer diameter of the drill pipe 32 is.

At pin 1 a slip ring 3 and a capture ring 4 are rotatably accommodated, which are surrounded in the assembled state of an outer ring. 5 The diameter of the outer ring 5 is slightly larger than the diameter of pin 1 and box 2 and made from a wear-resistant material so that it can serve as a wear part that can be easily replaced and the pin 1 and the box 2 protects against excessive wear , at its end facing the box 2 end 6, the pin 1 has a conically tapered outer diameter with an outer thread. In contrast, the box 2 has a conically widening inner diameter with the same cone angle and an inner thread on its pin 1 end facing. 7 The pin 1 and the box 2 can be screwed in this way by a few turns over a relatively long length with each other.

The slip ring 3 is, as Fig. 8 shows in detail of an inner ring 8 which is arranged on the pin 1, and an outer ring 9, which is rotatable relative to the inner ring 8 in the circumferential direction. In the axial direction of the outer ring 9 is fixed relative to the inner ring. 8 The slip ring 3 is - aside from following yet explained details - built otherwise known as per se from the prior art.

At the outer ring 9, two electrical contact elements are arranged in the form of contact pins 10 which are electrically connected to the brush of the outer ring 9 in the illustrated embodiment. It may be the same number of contact pins 10 as sliding contacts on the slip ring 3 may be present. but it is also possible to create a particularly reliable electrical connection, the sliding contacts to also provide for example two pins 10th Alternatively, it is also possible to provide more standard sliding contacts of contact pins 10 to provide the possibility of further electrical connections between the pin 1 and the box 2 is available when needed.

In FIGS. 5 and 6 of the catching ring 4 is shown in more detail. He has in the illustrated embodiment four through openings 11 for contact pins 10th He also has the slip ring 3 side facing seats 12 (in the illustrated embodiment, eleven receptacles 12) for compression springs 13 which are supported on the end face 14 of the outer ring. 9 The compression springs 13 are fully received in the receptacles 12 in the compressed state. On the opposite the seats 12 and compression springs 13 side is mounted on the catch ring 4 a catch pin 15 in the axial direction against a non-illustrated compression spring slidably. On the same side on which the pilot pin 15 is located, the passage openings are closed by a seal 16 11, which can be penetrated by the contact pins 10, however, and after retraction of the pins 10, the passage openings 11 also closes again.

On the outer circumference of the catch ring 4 is on the slip ring 3 side facing a bead 17, a sealing ring 18, for example an O-ring is arranged. The outer ring 5 is screwed via a thread 21 with the pin 1 and the catch ring 4 is located with its sealing ring 18 on the inner side of the outer ring 5 sealingly engages. At pin 1 is still further a groove 19 arranged in the area under the capture ring 4, in which a sealing ring 20, for example an O-ring, is located, which also rests sealingly against the inside of the catch ring. 4 Through the thread - S -

21 and the seal rings 18 and 20, the space in which the slip ring is 3, are sealed.

On the catch ring 4 side facing the box 2 has on one hand a catch opening 22 for the catching pin 15 and the other contact elements in the form of two contact sockets 23rd Since only two pins 10 are used in the illustrated embodiment in the drawings, only two contact sockets 23 are present. In addition to the two contact sockets 23 two further seats 24 are still arranged, which can be equipped as needed with contact sockets 23rd In Fig. 3, it is seen that the contact sockets 23 and the up took 24 are also closed by a seal 25 which can be penetrated by the contact pins 10 also and 23 close the contact sockets again after the withdrawal of the contact pins 10. The seal 25 is not shown in Fig. 7.

The seals 16 and 25 are pierceable seals and may for example be made of rubber and is provided from the outset with a perforation which facilitates the penetration and the pulling out of the contact pins 10, which must be ensured, however, that the seals 16 and 25, even if contact pins 10 are so dense that no spark or arc skip or can be ignited, when the contact pins 10 or contact sockets 23 are under tension in order to minimize a possible explosion hazard. In addition, the seal must prevent the risk of contamination and the penetration of various liquids under the harsh conditions of a drilling process.

In Fig. 9 is a section of the box 2 is shown in which a first slanted leading from the interior of the box 2 to the outside bore 26 and further comprising a branching therefrom, excluded oriented in the axial direction of bore 27 can be seen which lead to the recesses 28 in which the contact sockets are received 23rd Through these holes 26 and 27 and, optionally, an unillustrated knuckle, the contact sockets 23 can be connected to a linkage arranged in the interior of the tubes 32 line. In Fig. 10 a section through the pin 1, in which a bore 29 is seen, which leads from the interior of the pin 1 to the not shown in this drawing slip ring. In this way, a arranged in the interior of a drill pipe 32 line can be optionally connected via a subsequent inside the pin 1 to the bore 28, not shown, elbow, with the sliding contacts of the inner ring. 8

Typically, a pin 1 and at the other end a box 2 will be disposed on a drill pipe 32 at one end, with the respective contact elements (pins 10 and female contacts 23) are connected to each other via the running in the interior of the drill pipe 32 electrical line. By screwing of drill pipes 32 in each case via a pin 1 and a box 2 thus extending along the entire drill string, transit electrical continuity can be established. The screwing together pin 1 and Box 2 is inventively as follows. In the disconnected state of pin 1 and box 2, the catch ring 4 is pressed by the compression springs 13 so far from the outer ring 9 away that its bead 17 and the sealing ring 18 rests against an inwardly protruding projection 30 of the outer ring. 5 Since the outer ring 9 is not axially displaceable, the tips of the contact pins 10 are pulled so far in the catch ring 4 inside, and that they are located behind the seal 16, these do not penetrate. When the box 2 placed over the tapered end 6 of the pin 1 and thereby rotated to screw the box 2 to pin 1, the box 2 comes with its end face 31 is first in contact with the catch pin 15 against the force of its compression spring is pushed backwards in the catch ring 4 and snaps at the latest after one complete revolution of the box 2 in the fishing hole 22nd

From that moment, also the catch ring 4 and the contact pins 10 of the outer ring 9 are rotated with the box. 2 Once the thread between pin 1 and box 2 starts to engage, the catch ring 4 is increasingly pressed against the outer ring 9 until it completely rests on it. During this movement the sharp catch pins 10 begin the first seal 16 and to penetrate in Subsequently, the seal 25, until they penetrate into the contact sockets 23 and provide an electrical connection. Since the catching ring 4 and the box 2 are precisely aligned in the circumferential direction by the catching pin 15, an exact occurrence of the contact pins 10 is also ensured in the contact sockets 23rd

If the connection between the pin 1 and box 2 is separated again, is pressed away during unscrewing of pin 1 and box 2, the catch ring 4 by the compression springs 13 from the outer ring 9, so that the contact pins are pulled out of the female contacts 23 10th Therefore, the urging force of the compression springs 13 must be so large that both the friction of the contact pins 10 in the contact socket 23 and the seals 16, 25 as well as the friction of the seal rings 18, 20 can be securely overcome. The length of the contact pins 10 and the spring travel of the catching ring 4 are coordinated so that the capture ring 4 only then released from the end face 30 of the box 2 when the contact pins 10 are retracted so far as to the seals 16, 25 no longer penetrate, so that a safe cutting of pin 1 and box 2 ensured.

The construction solves the problem that two components of movement to occur during the screwing of the two connecting elements, namely a circumferentially and in the axial direction of the connecting elements. Due to the fact that one of the two contact element in circumferential direction is movable, it can rotate with the other connecting element in the production of electrical or galvanic connections between the two contact element, so that the two connecting elements are connected to each other only through the axial movement component have to. The compensation of the relative movement of the pin 1 and the box 2 for the production of the electrical connection during the tightening process can also be performed in other ways. Essential is the resolution of the degrees of freedom of movement between the pin 1 and the box 2 during the screwing in the circumferential direction and in the axial direction. It must by an input device the position of a contact element 10, such as the connector position in the pin 1, with the position of the other contact element 23, eg of the bushing position in the box 2, while the screw are aligned so that the electrical contact pins into the meet electrical sockets. This may not necessarily take place over sprung or electrical or magnetic activated pilot pins 15, which are placed on pin 1 or 2 and the box and provide a positioning of the contact pins during Verschraubprozesses in the circumferential direction but preferred.

In Fig. 11 is shown a drill pipe 32, to which at one end a pin 1 and a box at the other end 2 are arranged. In the in Fig. 11 embodiment shown, the drill pipe 32, the pin 1 and the box 2 are made in one piece, which is a possible embodiment. In general, the drill pipe 32, the pin 1 and the box 2 but be separate components which are fixedly connected to each other.

In order to lay an electrical lines within the drill pipe 32, a conduit 33 may be arranged in an embodiment of the invention within the drill pipe 32, which by knee pieces 34, 35 to the pin 1 and the box 2 or the provided therein holes 26, 29 are connected. In the bores 26, 29 fittings 36 are used which seal the holes 26, 29 on tapered shoulders 37 relative to the interior of the drill pipe 32nd In these fittings 36, the elbows 34, screwed tightly 35th

One or more electrical cables can be routed in this manner from pin 1 to the box 2, without coming into contact with the located inside the drill pipes 32 rinsing liquid.

The electrical connection can be produced by means of slip rings, for example, wherein the electrical transmission between the outer ring and inner ring by means of balls (such as a ball bearing) or on each abrasive metal rings by means of two (such as a bearing) or can be done by means of electrical brushes.

It is also possible to use for compensation of the rotational movement of a cable, for example, is wound on a cable drum, which is provided with a spiral or helical spring. It would for example also possible to use a spiral or coil spring itself as the electrical conductor, which compensates for the relative movement between the movable contact member and the pin 1 or the Box2.

Claims

claims:
1. Device for connecting electric cables to be screwed together, substantially rohrfömnigen connecting elements (1, 2) of drill pipes (32), characterized in that on a connecting element (1) a first electrical contact element (10) in the direction of rotation of the connecting element (1 ) is displaceably arranged, and that (at the other connecting element 2) a second electrical contact element (23) is fixedly arranged.
2. Device according to claim 1, characterized in that the movable contact element (10) is arranged on a rotatably arranged on the connecting element ring (9).
3. A device according to claim 2, characterized in that the ring (9) is an outer ring of a slip ring (3).
4. Device according to one of claims 1 to 3, characterized in that the contact element (10) at least one in the axial direction from the ring (9) abstehen- on the ring (9) of the contact pin.
5. The device according to claim 2 and 4, characterized in that a catching ring (4) is arranged in the axial direction in front of the ring (9) for the contact pin (10) has a passage opening (11).
6. The device according to claim 5, characterized in that the catch ring (4) has a preferably spring-loaded catching pin (15) which can engage (2) on the other connecting element in a trap opening (22).
7. Apparatus according to claim 5 or 6, characterized in that the catch ring (4) in
Longitudinal direction of the contact pin (15) relative to the slip ring (2) is movable.
8. The device according to claim 7, characterized in that the catch ring (4) from a first position in which the tip of the contact pin (10) within the snap ring (4), into a second position in which (the tip of the contact pin 10) outside the
Catch ring (4), is movable.
9. Device according to claim 7 or 8, characterized in that the catch ring (4) of at least one spring (13) is pressed from its first position towards the second position.
10. Device according to one of claims 5 to 9, characterized in that the passage opening (11) on the from the slip ring (2) facing away side has a seal (16).
11. Device according to one of claims 4 to 10, characterized in that the fixed contact element (23) is a female contact, on the the other contact element (10) facing side has a seal (25).
12. The apparatus of claim 10 or 11, characterized in that the seal (16, 25) has a pierceable seal, for example a rubber seal.
13. The device according to one of claims 2 to 12, characterized in that the ring (9) and the catching ring (4) by an outer ring (5) are surrounded.
14. The apparatus according to claim 13, characterized in that the outer ring (5) has an outer diameter which is larger than the outer diameter of the connecting elements (1, 2).
15. Device according to claims 1 to 14, characterized in that in the connecting elements (1, 2), bores (26, 27; 29) are arranged, through which run the electric cables.
16. Device according to one of claims 1 to 15, characterized in that the electric lines, a power-line communication is connected.
EP20100730031 2009-06-08 2010-06-08 Device for connecting electrical lines for boring and production installations Active EP2440737B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT8812009A AT508272B1 (en) 2009-06-08 2009-06-08 Device for connecting electric wires
PCT/AT2010/000202 WO2010141969A3 (en) 2009-06-08 2010-06-08 Device for connecting electrical lines for boring and production installations

Publications (2)

Publication Number Publication Date
EP2440737A2 true true EP2440737A2 (en) 2012-04-18
EP2440737B1 EP2440737B1 (en) 2015-09-16

Family

ID=43302193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100730031 Active EP2440737B1 (en) 2009-06-08 2010-06-08 Device for connecting electrical lines for boring and production installations

Country Status (4)

Country Link
US (1) US8342865B2 (en)
EP (1) EP2440737B1 (en)
CA (1) CA2763366C (en)
WO (1) WO2010141969A3 (en)

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CA2763366C (en) 2015-09-15 grant
WO2010141969A3 (en) 2011-04-14 application
WO2010141969A2 (en) 2010-12-16 application
US20110217861A1 (en) 2011-09-08 application
US8342865B2 (en) 2013-01-01 grant
CA2763366A1 (en) 2010-12-16 application
EP2440737B1 (en) 2015-09-16 grant

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