SU177949A1 - SUBMERSIBLE DISCONNECTOR - Google Patents

Description

There are known devices for powering electric drills in a two-ground-earth system (DPS), comprising a cable gland and an isolator operated by a flushing fluid pressure head, a contact system and a spring-loaded stem of which are housed in an oil filled housing. The disconnectors used in these devices are complex in design, unreliable, and it is difficult to monitor the phase insulation and insulation of the engine relative to the ground.

In the proposed submersible disconnector, in order to simplify the design and increase reliability, an elastic diaphragm is applied, fixed in the upper part of the disconnector housing, connected to the stem and perceiving the action of the pressure of the washing liquid. To control the phase-to-phase and motor-to-ground insulation, the disconnector contact system is two-phase.

FIG. 1 shows the proposed disconnector, and in FIG. 2 - turning on the device.

Submersible hydraulic disconnector It is placed in a string of drill pipe and consists of an actuating device 1, rigidly connected to the lower translator 2 through the sleeve 3, having a port for the passage of flushing fluid and a cable. On the lower sub

The disconnector body 4 is screwed to the upper end of which is attached an upper sub 5 with a built-in two-prong rod 6. In the lower sub is located a three-prong clutch 7. The upper sub with a two-prong stem is connected to the drill pipe string with a twisted current lead, and the lower sub

with three-contact coupling - with a sub under the electric drill elevator. A guide bushing 9 is fixed in the corns of the 8th apparatus by electric welding, in which the brush 10 moves with the plate 11 screwed onto the upper end. A key 12 in the keyway on the brush and a keyway in the guide bush prevent the disc from turning in relation to the guide bush. Parallel geometric axis

the sleeves in her body have holes. The spring 13 is positioned on the plate with a plate and a guide bushing. At the lower end of the stem, pin 15 is attached to the strap 15 from the insulating material. Two contact plates 16 are attached to the bar at both ends. A disc 17 of insulating material is located in the lower part of the housing of the switching apparatus. To prevent its angular movement relative to the body of the nut 19, secured by a washer 20. On the disk, four contacts 21 are placed in special sockets. A grounding ring 22 and a shock absorber ring 23 are located between the disk and the washer. The grounding ring serves for electrical connection of one of the four contacts on the disk with the body of the switching off device, and through it - with the drill pipe string. A shock absorber ring provides a reliable electrical contact between the grounding ring and the housing through a washer and nut, for which it is split. In this case, the ring tends to be straightened and pressed against the inner wall of the housing of the switching-on apparatus, ensuring reliable electrical contact. To another contact is connected the core, which is to be electrically connected to the earth (drill pipe string). Contacts are closed by one of two contact plates. The ends of the other severed core are attached to the third and fourth. Thus, one contact plate connects and disconnects the motor windings to ground, the other connects and disconnects the end of the core. Consequently, there is an electrical connection and the gap of two current-carrying sections of the three. A core for connection to the earth and another core, the ends of which are connected, are inserted into the housing through the nipple 24. The lead is sealed with a clip of the rubber flange of the cable gland 25 with the help of crackers 26 and the pressure nut 27, lock washer 28 and lock nut 29. From above and below the housing of the closing apparatus is closed by elastic diaphragms 30 and 3J. The cap 32 protects the upper flexible diaphragm from mechanical damage and has openings for the contact of the washing liquid with the upper flexible diaphragm, which is clamped by bolts 33 between the upper flange of the housing and the flange of the protective cap. From samootvichnvani bolts stopper TC wire. The lower elastic diaphragm is clamped between the lower flange of the housing 8, and the upper flange of the sleeve 3 with the aid of bolts 34 that are stoning with wire. The clamps 35 secured the cable gland to the enclosure body. Monitoring the resistance of the power supply system according to the two-earth-ground pattern is performed periodically. Subject of the invention 1. A submersible disconnector, for example, for an electric drill motor, driven by a flushing fluid pressure fluid, containing a contact system and a spring-loaded rod housed in an oil filled housing, and a cable entry, characterized in that, in order to simplify the design and increase reliability The elastic diaphragm connected to the indicated rod and perceiving the action of the pressure of the washing liquid was applied. 2. Disconnector according to claim 1, characterized in that the contact disconnector system is made two-phase for controlling the interphase insulation and insulation of the motor relative to the ground.

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