Electrical connector and method for its manufacture

FIELD: cable connectors for power transfer between power supply and borehole instrument modules of downhole telemetering system in the course of boring.

SUBSTANCE: proposed electrical connector has one or more contact pairs insulated from one another and electrical conductors connected to internal and external opposing contacts of contact pairs. External contacts of contact pairs are made in the form of semi-rings which are installed opposite one another within flexible insert and are free to move toward one another under impact of external pressure. Proposed method for manufacturing this electrical connector includes connection of electrical conductors to contacts, of which external ones are made in the form of semi-rings, integral with auxiliary bushing and wrapped with band made of polymerizing or curing material, such as raw rubber, on top of auxiliary bushing. Wrapping procedure includes filling of cavities followed by placing conductors along blank axis and final wrapping until diameter of blank becomes greater than outer diameter of electrical connector. Blank is fitted between top and bottom cases of mold, compressed at the same time heating it, whereupon auxiliary bushing is completely removed by boring inner diameter of blank until semi-rings are fully separated.

EFFECT: enhanced power capacity, reliability, and service life of power supply.

5 cl, 6 dwg

 

The invention relates to electrical engineering, namely to a cable connecting device and can find application in downhole geophysical and navigation systems for energy transfer between the power source and the downhole tool modules.

Known cable lugs for the supply of electricity to the consumer containing the electrical sensors mounted in the insulating housing.

Also known cable tip RF patent No. 2004790, MKI EV 47/00, Appl. 05.05.91, containing cylindrical body with a bottom having a through hole for wiring wiring, clamping nut, the nut, the electrical sensors of electrocoagulated and gland seal.

The disadvantage of this cable tip is that it is unworkable in deep wells under high hydrostatic pressure. Between the cylindrical surfaces of the electrical sensors and cylindrical surfaces of the packing seal is liquid despite the fact that the seal is compressed through the cracker through the nuts.

In addition, the ends of the electrical sensors affects a large pressure, which pushes them into the downhole geophysical and navigation system.

This breaks the integrity of downhole geophysical complex, which leads to failure of the electronic AP is oratory.

The task of creating a useful model is to increase the reliability of the electrical connector multi-pin cable lug and ensuring its integrity at high pressure.

The solution of the stated problem is achieved in the electrical connector intended primarily for the connection of separate parts of the downhole tool containing one or more contact pairs that are isolated from each other, the electric wires connected to opposite external and internal contacts, so that the external contacts in the form of half rings, set against each other in the flexible insert and have the opportunity to move towards each other under the action of external pressure. Flexible insert is made paliperidonesee or vulcanizing material, for example rubber, is on both sides of the protrusions, one of which is pressed by a nut to one part of the downhole tool and the other to the lead-in sleeve, intended for the direction of the Central contact mounted on another part of the downhole tool. Internal contacts mounted on a hollow Central contact through the insulating sleeve and connected to the current-carrying wire. Electrical wire is made in a heat-resistant insulation.

The solution of the stated problem is achieved in the way that made the I connector, electrical, including the connection of the electric wires with the contacts and external contacts are in the form of half rings, along with technological sleeve, wrapped with tape from polymerizing or vulcanizing material, such as raw rubber, on top of technological sleeve, wrapping tape is carried out in two stages, first fill the trench, then lay the wire along the axis of the workpiece, and finally wrapped up receiving the workpiece diameter greater than the outer diameter of the electrical connector, the workpiece is inserted between the upper and lower housings of the mold, produce compression with simultaneous heat, then remove technological bushing bore diameter of the workpiece to the complete separation of the half-rings.

The invention is illustrated in the drawings, where:

- figure 1 shows a view of the device assembled with parts of the downhole tool,

- figure 2 shows a case with a nut inside the cylindrical body,

- figure 3 shows a section a-a,

- figure 4 shows the device in the collection,

- figure 5 and 6 - operation of manufacturing the connector.

The proposed solution satisfies the criteria of novelty, inventive step and industrial applicability.

The electrical connector 1 is designed to connect one part of the downhole devices is and 2 with the lead-in sleeve 3 by means of nuts 4 and 5 and includes one or more contact pairs 6, isolated from each other, the electric wires 7 connected to opposite 8 external and internal contacts 9. External contact pairs 8 are set against each other in the flexible insert 10 made in the form of semicircles and are able to move towards each other under the action of external pressure. Flexible insert 10 is made of paliperidonesee or vulcanizing material, such as rubber, and has on both sides of the tabs for mounting nuts 4 and 5 to the connected parts of the downhole tool 2 and 3. Internal contacts 9 mounted on a hollow Central contact 11 through the insulating sleeve 12 and is connected to the electric wires 7. The electric wire 7 is made in a heat-resistant insulation.

In the manufacture of the electrical connector 1 (figure 5) external contacts 8 are in the form of half rings together with technological sleeve 13, install the bushings 14, 15, the contacts 8 you solder electrical wires 7, wrapped with a ribbon 16 from polymerizing or vulcanizing material, such as raw rubber, on top of technological sleeve.

Wrapping tape 16 is carried out in two stages, first fill the cavity, then put the wire 7 along the axis of the workpiece, and finally wrapped the tape 16 to receive the workpiece diameter greater than the external diameter of the connection the preserver electric. The workpiece 17 is installed between the upper 18 and lower 19 buildings of the mold, produce compression with simultaneous heating, and then remove the bushing 14 and 15 and completely remove technological sleeve 13 bore the inner diameter of the workpiece 17 to the complete separation of the half-rings.

The application of the invention allowed:

1. To increase the reliability of the cable tip at his work in high pressure environment.

2. To ensure the Assembly of the power source with the downhole device at a significant misalignment and high accuracy of manufacture of the mating parts.

3. To ensure absolute tightness of the downhole equipment.

1. The electrical connector intended primarily for the connection of separate parts of the downhole tool containing one or more contact pairs that are isolated from each other, the electric wires are connected to opposite external and internal contacts, wherein the external contacts in the form of half rings, set against each other in the flexible insert and have the opportunity to move towards each other under the action of external pressure.

2. The electrical connector according to claim 1, characterized in that the flexible insert is made paliperidonesee or vulcanizing material, such as rubber,has on both sides of the protrusions, one of which is pressed by a nut to one part of the downhole tool and the other to the lead-in sleeve, intended for the direction of the Central contact mounted on another part of the downhole tool.

3. The electrical connector according to claim 1 or 2, characterized in that the internal contacts are mounted on a hollow Central contact through the insulating sleeve and connected to the current-carrying wire.

4. The electrical connector according to claim 1 or 2, characterized in that the electric wire is made in a heat-resistant insulation.

5. A method of manufacturing the electrical connector comprising the connection of the electric wires with the contacts, wherein the external contacts are in the form of half rings, along with technological sleeve, wrapped with tape from polymerizing or vulcanizing material, for example, raw rubber on top of technological sleeve, wrapping tape is carried out in two stages, first fill the trench, then lay the wire along the axis of the workpiece, and finally wrapped up receiving the workpiece diameter greater than the outer diameter of the electrical connector, the workpiece is inserted between the upper and lower housings of the mold, produce compression with simultaneous heat, then remove technological sleeve the bore inside nego diameter of the workpiece to the complete separation of the half-rings.



 

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