Cable connector for use in conducting medium

FIELD: electrical engineering; drilling and servicing inclined and horizontal oil-gas wells.

SUBSTANCE: proposed cable connector specially designed to prevent ingress of conducting medium (drilling mud) into its interior thereby ensuring reliable insulation of contacts from environment and preventing electric current leakage (leakage resistance being minimum 50 - 100 Megohms), or poor contact between connector mating parts has pin section and jack section with contact members inside them, as well as membrane. Jack section is made in the form of cylindrical shroud with stepped inner space accommodating contacts made in the form of flexible split rings secured on flexible cross-arms, flexible membrane disposed at pin section joint, and spring-loaded sealing ring mounted within shroud for displacement. Inner space of jack section is filled with insulating liquid. Cylindrical pin section has conical end; diameter of pin cylindrical part is larger than inner diameter of sealing ring.

EFFECT: enhanced tightness and reliability of contact between mating parts of connector.

1 cl, 4 dwg

 

The invention relates to electrical engineering and can be used in the drilling and operation of directional and horizontal oil and gas wells.

Known cable connector according to US patent No. 4570709 (publ. 1986) comprising a housing consisting of two parts (male and female), which posted the contact elements. Contact elements in the form of metal pins, when the mechanical connection providing electrical contact. Socket part of the connector is part of the body geophysical instrument, the descent into the borehole on the drill pipe. In the process of working male portion of the connector is lowered into the well through the drill pipe on wireline. When integrating both parts of the connector electrical contacts are connected, providing electrical power blocks geophysical instrument and passing him information on the logging cable to the surface.

The disadvantage of this connector is the possibility of ingress of drilling fluid into the internal cavity of the cable connector.

Known hermetic electrical connector on AC (publ. 30.12.80)containing the plug with pin contacts, housed in the insulator, and the centering sleeve telescopically covering the socket with the slots, the inner cavity of which is filled with insulating liquid and Rita by coupling an elastic diaphragm, node mutual fixation of the plug and socket elements of the angular orientation in the form of a longitudinal groove located therein finger, made in the centering sleeve and one of the parts of the connector, and a current supply, which is provided with a cylindrical part having a weight, which provides the puncture aperture pin on one end of which is fixed a socket, the latter is connected with the conductors, at length placed in the cylindrical part, the node mutual fixation made in the form of still installed on the empty area of the electrical power supply on the side opposite the outlet sleeve, on which hinged pair one shoulder levers pivotally connected with two shoulders arms, one ends of which are interconnected by a spring, while others interact with the annular protrusion made on the inner surface of the centering sleeve, the groove has a lead-in portion and formed on a cylindrical part and a finger in the centering sleeve, and an insulating fluid has a density less than the density of the drilling fluid and the plug insulator is made of a hydrophobic material.

The disadvantage of this solution is the possibility of ingress of drilling fluid into the internal cavity of the connector that leads to the violation of the contact of the connected parts of the connector.

The invention solves salutaridine hit the outer conducting medium in the cable connector, to ensure reliable isolation from the external environment and prevent:

1) electric current leak;

2) violation of the contact of the connected parts of the connector.

To achieve the technical result in the cable connector to work in a conductive medium, comprising male and female parts with contact elements within them and membrane socket part made in the form of a cylindrical body, the inner cavity of which is made stepwise, with contacts made in the form of a resilient split rings, mounted on a flexible traverse, elastic membrane that is located by the junction with the whip part, and a spring-loaded sealing ring mounted in the housing with the ability to move, and the inner cavity nesting parts filled with insulating fluid, the whip portion is cylindrical with a conical end, and the diameter of the cylindrical part of the pin is larger than the inner diameter of the sealing ring.

Distinctive features of the proposed cable connector from the above known closest to him, is that the female part is made in the form of a cylindrical housing, an internal cavity which is made stepwise, with contacts made in the form of a resilient split rings, mounted on a flexible traverse, e is ustichnoe membrane, located by the junction with the whip part, and a spring-loaded sealing ring mounted in the housing with the ability to move, and the inner cavity nesting parts filled with insulating fluid, the whip portion is cylindrical with a conical end, and the diameter of the cylindrical part of the pin is larger than the inner diameter of the sealing ring.

Due to the presence of these characteristics of the proposed design eliminates the ingress of drilling fluid into the internal cavity of the connector, providing a reliable sealing of the contacts and the normal operation of the device when the resistance of the leak is not less than 50...100 Mω.

The proposed design is illustrated in the drawings, figure 1-4.

Figure 1 shows the female end of the cable connector.

Figure 2 shows the whip part of the cable connector.

Figure 3 shows a cable connector Assembly.

Figure 4 shows the process of displacement of the insulating fluid of the female cable connector.

Cable connector consists of a connector socket 1 pin 2 parts (figure 1). Socket part is made in the form of a cylindrical housing 1 (Fig 1), the inner cavity of which is made stepwise. The contact elements are in the form of a resilient split rings 2, mounted on a flexible traverse 3. From the junction with the whip frequent the second housing is closed with an elastic membrane 4. In case there are sealing ring 5, which is placed in the groove 6 of the casing and against the inner annular ledge spring 7. The internal cavity nesting parts filled with insulating liquid 8. The whip part is cylindrical with a conical end 9 and the slip ring 10 (figure 2). The diameter of the cylindrical part of the pin 11 is larger than the inner diameter of the sealing ring 5 (Fig 1).

Cable connector for operation in the conductive medium is a key element and technological complex delivery of geophysical instruments downhole during drilling and operation of directional wells, i.e. those where the device cannot simply be lowered downhole on a wireline. The device is delivered downhole on the end of the columns of a flexible tube, for example, the booster, the total number of which is chosen so that they reach the bottom under its own weight. Geophysical instrument is connected with the column pipe through the cable connector. After Assembly in a vertical wellbore into the column lower wireline, provided on the end of the nesting part of the cable connector, to connect with the whip part, with the set of electrical contact with the device. The connection can occur in drilling or other solution that fills the hole in one of the normal RA is the notes of the instrument leak resistance should be not less than 50...100 Mω.

Work with the proposed cable connector is as follows.

The logging cable, fitted on the end of the nesting part of the cable connector is lowered into the column to join with the whip part. The cone-shaped end of the pin portion pierces the membrane and enters into the internal cavity of the female cable connector, forcing out the insulation liquid, the viscosity of which is chosen so that it is freely released into the gap between the male part and the housing female cable connector. In the end position the electrodes are in contact (figure 3). Seal 5 prevents the mixing of the insulating liquid and mud, with the contact ring and the pin portion of the connector are always in insulating liquids, which provides reliable insulation of the cable connector to work in a conductive medium. Insulating fluid is in the cable connector at a pressure equal to the outside, so it does not it is mixed with mud. The cone-shaped end of the whip part after puncture the membrane when driving in the inner cavity of the female cable connector stretches sealing ring, with insulating fluid is able to freely enter, pressing the sealing ring 5 (figure 4), then the ring is pressed by a spring to the inside is it the groove of the housing, what prevents the outer conducting medium into the housing, ensuring reliable isolation from the external environment. Reliable contact contributes to the fact that the contacts made in the form of movable resilient split rings, mounted on the moving traverse. Contacts made in the form of resilient split rings with an inner diameter smaller than the diameter of the cylindrical part of the pin that allows you to ensure reliable contact, because the male part can log in to the socket part at an angle or close to a wall, the split ring is in contact with pin part expands and grabs her. The execution of the contact rings on the flexible traverse also contributes to the reliable contact with the deflection of the pin against axial direction.

Cable connector for operation in a conductive medium, comprising male and female parts with contact elements within them and the membrane, wherein the socket part is made in the form of a cylindrical housing, an internal cavity which is made stepwise, with contacts made in the form of a resilient split rings, mounted on a flexible traverse, elastic membrane that is located by the junction with the whip part, and a spring-loaded sealing ring mounted in the housing for movement, and the internal cavity of the overall reproductive the new part is filled with an insulating liquid, the whip part is cylindrical with a conical end, and the diameter of the cylindrical part of the pin is larger than the inner diameter of the sealing ring.



 

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