Connecting node

FIELD: electrical engineering.

SUBSTANCE: invention refers to the connecting nodes for connection of electric power cable (1) to the submarine pipeline (8) and/or disconnecting from it, in particular, for direct electric heating. Connective node contains envelope conical member (6) connected to the connective plate (2) on the surface of pipeline (8), reverse enveloped conical member (5) fixed on the end of power cable (1) and screw tightening device (70) for contact between envelope conical member (6) and enveloped conical member (5). Tightening device (70) includes first rod element (7) mage with possibility of entering the first socket (16) of envelope conical element (6) having the hole directed against the direction of the cone (12) of envelope conical element (6) and serving for location of first rod element (7) with first rod element (7) having tightening screw (7a), inner end (7c) of which is manufactured with possibility of contact with enveloped conical element (5) and outer end (7b) is available for connection and disconnection operations.

EFFECT: quick and safe connection of the cable to the pipeline and/or its disconnection.

11 cl, 2 dwg

 

The present invention relates to the connecting nodes intended for connection of electrical cables to the offshore sub-sea pipelines and/or detach to the appropriate methods. Such connecting node contains mounted on the surface of the pipeline covering the conical element mounted on the end of the power cable response covered conical element and a bolt tightening tool designed to ensure contact between the covering and covered conical elements.

The purpose of the connecting node is running fast and safe connection of power cable to the pipe and detach it from the pipeline using a rolling remotely controlled apparatus (PDA) or possibly rolling a remotely controlled working machine (PURA). After connecting the cable in the pipeline to be submitted to a current of, for example, about 3000 amps with the aim, in particular, for direct electrical heating.

In the United Kingdom patent No. 2357910 disclosed conical system that contains the elements that are essentially similar to the above, or, more precisely, it reveals the repair concept connect auxiliary cable (single wire) to an already installed on the pipeline connecting the Plaza is ine. This is done by drawing the cable through the connecting plate with the pull rope, which after installation of the cable is cut. Such repair cable more disconnected to not be, so this is a permanent connection that is not used for temporary connections, since disconnecting it at the same time is impossible. Existing high-voltage connectors are too large in size, and to perform docking of them require the same large special tool with a snake.

Of particular interest in connection with the present invention is of short duration or intermittent electrical connection of the power cable to the pipeline (usually 14 days). This cable (usually solid) must be submitted with the vessel, it can be connected to a predetermined connecting plate and disconnect from it. This operation is performed using PDA (or PURE) as far as possible quickly and simply. It should be noted that the temporary heating of pipelines using an energy source and cable installation from the ship had never been.

The aim of the present invention is the use of a fundamentally known, the connection type pin socket performed using the apparatus of PDA or PURE, and implementation of innovative and special the oops concept with flexible conical connection installed using rotary element bolt-pin, together by means of the apparatus PDA or PURE.

In the above connection node distinctive signs, mainly characterized by the fact that the tightening means includes a first pin element adapted to receive the first slot to the outer conical element having an aperture directed in the direction opposite from the cone covering the conical element designed to receive the first pin member, the first pin element has a tightening bolt, the inner end of which can engage with covered conical element and its outer end is available to perform operations connecting-disconnecting.

Additional distinctions of the invention are disclosed in dependent claims relating to the connection node, and to a corresponding method.

The above-mentioned objectives, the differences and advantages of the present invention will be clearer from the following detailed descriptions of preferred options of its execution illustrated in the accompanying drawings, which depict the following:

figure 1 schematically represents an axial section of the connecting node of the cable pipeline in accordance with a variant of the m of the present invention;

figure 2 schematically shows the sequence of stages of the method of connection using the connector shown in figure 1.

Figure 1 shows the electric power cable 1, containing, for example, solid conductor, on which there is mounted covered conical element 5. Around the conical element 5 is the main (or second) pin element 3, which is a socket 4, which is the docking station for this pin element. The connecting socket 4 is supported by the connecting plate 2, is welded or attached to the surface of the pipeline 8 otherwise.

For reliable placement of the whip element 3 in the socket 4 is provided by a ball locking mechanism, the balls 13 which are installed with the possibility of the entry made in the circumference of the groove 15, which in itself is well known. The difference of this construction is that the groove 15 has a slightly elongated shape in the axial direction. Thus, the male element 3 inserted into the socket 4 has a certain degree of freedom of its movement in the longitudinal direction relative to the socket.

To the connecting plate 2 is welded also covering the conical element 6 having a feedback form regarding covered conical element 5. In the shown execution conical covering al the COP/socket 6 passes through the plate 2, while the socket 4 is pressed against the plate 2. When such construction or such relative arrangement of the main elements of the connecting node, all the elements are very close to the connecting plate 2 and is rigidly associated with it.

The end of the covered conical element 5 has a corrugated contact surface 5A to ensure good electrical contact with the conical covering element 6. This increases the electrical contact corrugation may be in the form of a notch made on the surface to be covered or covering the conical element.

Items that are installed on the pipeline 8, such as the connecting plate 2, the connecting socket 4, socket or covering the conical element 6, is small and they do not contain any moving parts. Their design makes them quick cleaning and protection covers. These items can be covered with thermal insulation to minimize heat loss of the pipeline.

Part of the connecting node, which for the formation of electrical connections in accordance with the above explanation, are movable, are located on one side covered by a conical element 5 together with its main (or second) pin element 3, and on the other side is tightening tool, octanal the living and supporting a reliable electrical and mechanical contact between the covering and covered items.

The elastic means 70 contain auxiliary (or first) pin element 7, which is included in the socket 16 from the outer or rear end of the conical covering element 6. Center pivot element 7 is inserted in the axial bolt 7a, providing contraction. The inner end of the bolt 7C 7a is threaded and made with the possibility of screwing this internal thread at the end of the covered conical element 5. To allow rotation of the bolt 7a at its outer end 7b is accessible from the external side of the pin element 7.

As shown in figure 1, the first pin element 7 is made of a Central cavity 9 into which is inserted a compressed spring 17, providing the bolt 7a with the stop element 18 elasticity in the longitudinal direction. This is done so that the inner end (7C) of the bolt was, in particular, are less susceptible to shock and damage during the installation site prior to the screwing of the end within the conical element 5.

As the second pin element 3, the first pin element 7 is equipped with ball locking mechanism 19/20, to ensure the degree of freedom given to the covering element relative to the conical element 6 to its retraction, as described previously. Each pin element 3, 7, respectively, of the handle 23 and 27 PDW.

Usually covered conical element 5 done which is made of copper, and covering the conical element 6 is made of steel. This choice of materials is determined mainly by the conditions of the pipeline in the sea water, which adversely affects the structural elements. The robustness of this mechanism is very important, especially for structural elements that are already installed on the pipeline: a practical implementation of this node should be guided by the estimated design life under water at a depth of from about 550 to about 850 meters 50 years.

Illustration of stages of the method of installation of the electrical cable 1 on the pipe 8 is made with reference to figure 2.

In stage 1, PDA or PURE with its lever arm and capture 50 captures covered conical element 5 with pin element 3, which, together with the attached cable 1 is omitted from a supply vessel (not shown) on the seabed near the pipeline 8 and the connecting plate 2. The end of the cable with pin 1 element 3 is held above the seabed with the help associated with cable floating buoys 100. From this position PDW or PURE sends covered conical element 5/ male element 3 in the connecting socket 4 on the connecting plate 2. After that, the whip element with locking devices 13/15 automatically locked in the expansion slots the previously described manner.

In stage 2, the same or different PDA or PURE now use the handle 27 captures the whip element 7 with a compression tool 70 and inserts it into the slot 16 covering the conical element 6 on the side opposite to the cone 12, with samosorn mechanism 19/20 for temporary connection of elements.

In stage 3, to establish a reliable contact between the covered and covering the conical elements of the same or another PDA or PURA using its gripper 50 or any special tool, capturing the outer end 7b of the bolt begins to turn the bolt 7a to screw it in covered conical element 5, thereby pulling between the two parts in the position shown in figure 1.

To disconnect the electrical connections formed in accordance with the above stages, PDA or PURE in step 3 (figure 2), must Unscrew the element 7a to Unscrew the covering, and covered the elements 6 and 5. When performing this operation, it should be remembered that the cone/5/3 pin has a degree of freedom in the longitudinal direction relative to the connecting socket 4 to facilitate mutual release of cones.

After that, being in the position that corresponds to step 1 or 2, PDA or PURE can pull themselves cone/5/3 pin and cable 1. For razjedinjenjem apparatus PDA or PURE can exert a large torque. In General, it is clear that the sequence of operations to disconnect the electrical connection must conform to the reverse order of the above steps 1, 2, 3.

In the context of direct electric heating operation is similar to the connection-disconnection of the cable is performed by the apparatus of PDA on the opposite end of the PAN-cable at the remote location of the pipeline, is a normal procedure.

The present invention offers solutions that provide certain advantages to perform a temporary heating of pipelines, when using PENG-cable is supposed to detach. The described solution by manipulation of a pair of "whip element is the nest using the apparatus PDA or PURE along with the new design of the conical elements and means for tightening represent a new concept of quick connect electrical power cables to pipelines and their disconnection.

1. Connecting the node to connect electrical power cable (1) with underwater sea pipeline (8) and disconnected, in particular, for direct electrical heating, containing conical covering element (6)attached to the connecting plate (2) on the surface of the pipe (8), the response covered cone element (5)fixed to the end of the power cable (1), and bolt the banner of the exciting means (70) to ensure contact between the conical covering element (6) and covered by a conical element (5), characterized in that the tightening means (70) includes a first pin element (7), able to enter into the first slot (16) female cone element (6)having an aperture directed in the direction opposite to the direction of the cone (12) female cone element (6) and is designed to host the first pin element (7), the first pin element (7) has a tightening bolt (7a), the inner end of which can engage with covered cone element (5), and the outer end of which is available for operations connection-disconnection.

2. The node according to claim 1, characterized in that the first slot (16) is coaxial with the cone (12) female cone element (6), and tightening the bolt (7a) is located in the center of the first pin element (7).

3. The node according to claim 1 or 2, characterized in that the threaded part (7C) tightening bolt (7a) can nevinovate the response thread covered cone element (5).

4. The node according to claim 1 or 2, characterized in that the Central cavity in the first pin element (7) contains a spring (17) axial compression, interacting with the thrust element (18)located in the middle part of the tightening bolt (7a), to ensure the elasticity of the bolt in the longitudinal direction.

5. The node according to claim 1 or 2, characterized in that the second stereo the element (3) is installed on the covered cone element (5) and able to enter into the second slot (4), supported by the plate (2) on the surface of the pipeline (8).

6. The node according to claim 1, characterized in that the first and second pin elements (7), (3) equipped with ball locking mechanisms(19), (20)/(13), (15), in which performed under the balls of the grooves (20), (15) have the form, somewhat elongated in the axial direction of the pin elements, to ensure each pin element of elasticity in the axial direction when you enter it in the appropriate slot.

7. The node according to claim 1 or 2, characterized in that the contact surface of the inner end of the covered cone element (5) is provided with a notch or roughness (5A) to improve electrical contact.

8. The node according to claim 1 or 2, characterized in that the first and second pin elements (7), (3) equipped with handles (27), (23) rolling remote controlled apparatus (PDA) or rolling remote controlled working machine (PURA) to enable communication with these devices.

9. The way to connect electrical power cable (1) from the sea by an underwater pipeline (8) using the connecting node containing mounted on the surface of the pipeline covering the conical element (6), the response covered cone element (5)attached to an end of an electric power cable (1), and bolt tightening means (70) for about what especiany contact between the conical covering element (6) and covered by a conical element (5), characterized in that it contains the following stages:
capture PDA or PURE capture (50) main (or second) pin element (3)including covered cone element (5), and the introduction of covered cone element (5) in the cone (12) female cone element (6),
capture PDA or PURE capture (50) auxiliary (or first) pin element (7), part of the tightening means (70), and the introduction of auxiliary (or first) pin element into the slot (16) female cone element (6) from the side opposite to the cone (12) covering the conical element;
manipulation of PDA or PURE tightening means (70) to ensure contact between the conical covering element (6) and covered by a conical element (5).

10. The method according to claim 9, characterized in that all the above mentioned stages are performed in the same apparatus PDA or PURE.



 

Same patents:

The invention relates to a device for connecting first and second parts of the underwater connector to provide electrical, hydraulic, air, optical, or other communications

Connecting node // 2443043

FIELD: electrical engineering.

SUBSTANCE: invention refers to the connecting nodes for connection of electric power cable (1) to the submarine pipeline (8) and/or disconnecting from it, in particular, for direct electric heating. Connective node contains envelope conical member (6) connected to the connective plate (2) on the surface of pipeline (8), reverse enveloped conical member (5) fixed on the end of power cable (1) and screw tightening device (70) for contact between envelope conical member (6) and enveloped conical member (5). Tightening device (70) includes first rod element (7) mage with possibility of entering the first socket (16) of envelope conical element (6) having the hole directed against the direction of the cone (12) of envelope conical element (6) and serving for location of first rod element (7) with first rod element (7) having tightening screw (7a), inner end (7c) of which is manufactured with possibility of contact with enveloped conical element (5) and outer end (7b) is available for connection and disconnection operations.

EFFECT: quick and safe connection of the cable to the pipeline and/or its disconnection.

11 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: sealed lead-in is intended for noncontact energy transfer from a submersible cable to radioelectronic undersea vehicle. The sealed lead-in comprises a detachable magnet core made of two halves; one of them together with primary winding is placed in a sealed unit of the submersible cable while the other one is placed in the counterpart of the sealed lead-in - in the sealed unit of the submersible cable. Jointing planes of the magnet core are placed in jointing plane of the sealed lead-in. Mechanical clamper for sealed units ensures water displacement from the space between jointing planes; to this end to jointing plane of one sealed unit between pads of the magnet core placed in the jointing plane a band of soft waterproof isolating material is applied; the material, for example rubber, has property of shape recovery when mechanical load is eliminated.

EFFECT: expanded functionality and scope of the device application, increased efficiency at energy transfer from the sealed power source to a sealed energy receiver when placed in salty sea water.

1 dwg

Protection device // 2578678

FIELD: oil and gas industry.

SUBSTANCE: invention relates to downhole protection device (1) for downhole tool (2), which regulates power delivery from drive to an electric component placed in the tool (2). The device (1) comprises the first element (3) including a group of conductors (4), the second element (6) comprising a group of conductors (7), and driving gear (31) for movement of the first element (3) in regard to the second element (6). Conductors of the first element (3) are represented by the first conductors (8) and the second conductors (9). At least two of the first conductors (8) have large square area of surface than the second conductors (9), and that is why the first conductors (8) transfer bigger quantity of electric energy to conductors of the second element (6) in comparison with the second conductors (9).

EFFECT: development of downhole protection device for downhole tool, which prevents unintended operations at break occurrence in the tool.

15 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: invention relates to a multichannel rotating electric connector and can include multiple first contacts, which are located radially from each other, and multiple second contacts that enter into electric contact with respective first contacts, wherein there is relative rotation between first and second contacts. Second contacts can be radially spaced from each other. Downhole tool includes one section, which rotates relative to other section of downhole tool, and a multichannel rotary electric connector, which includes multiple contacts of annular shape, which rotate relative to each other. Method of operating downhole tool in underground well includes generation of relative rotation between sections of downhole tool and maintaining multichannel communication by electrical signals between sections, wherein there is relative rotation between sections.

EFFECT: improved equipment for reception and transmission of electric signal.

18 cl, 10 dwg

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