RU2498041C2 - Protector for protection of power cable in well - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention offers protector for protection of power cable in well which contains housing with cable channel and central channel made as a whole with size for outside diameter of tubing string to attach protector housing on union joint. One end of folding bow-shaped binding clips is designed with loop-shaped end with possibility to rotate on axis through loop-shaped clip. The other end is fixed by bolt to the housing. Protector housing is made by die forming and is equipped with two guide ribs, reinforcing slots and guard ribs of slots. Cable input and output from cable channel in the housing is also equipped with guide members which are used for setting required gap b between tubing depending on thickness of a used cable. Folding bow-shaped binding clips are made two-layered and their ends are fixed to each other by T-connection from inner side are directed towards tubing. Fixing bolt is equipped with protecting cover. Protector housing is made casting; it is equipped with guide ribs and guard ribs of slots and guide members of the cable input and output from housing of cable channel.

EFFECT: improving operating reliability.

1 cl, 11 dwg

Description

The invention relates to the oil and gas industry and can be used to protect the power cable of the pump from mechanical damage during descent - lifting the suspension of tubing with the installation of an electric centrifugal pump in vertical, directional and horizontal wells.

The well-known "Protector for protecting the power cable in the well" (see Patent for the invention of the Russian Federation No. 2432448. Cl. ЕВВ 17/10. Publ. October 27, 2011), comprising a housing made as a unit with the cable channel, folding arcuate clamping clamps one end of which is made with a loop-shaped end rotatably on an axis that passes through the loop-shaped bracket.

It is known "Device for attaching a power cable to tubing" (see Patent for the invention of the Russian Federation No. 2263759. CL. EV 17/10. Publ. 10.11. 2005), containing a solid body with a longitudinal groove for laying the motor power cable, moreover, the upper and lower parts of the housing are equipped with corresponding upper and lower covers, each of which is mounted on a hinge and has a mounting device to the upper and lower parts of the housing, respectively, the side parts of the housing are made in the form of shelves, equipped with recesses for installation on the NK coupling T, one of the shelves is equipped with two axes for fastening the covers close to the side wall of the longitudinal groove for the cable, and the other shelf is equipped with a rib, for example, parallel to the bottom of the groove and protruding beyond the overall dimensions of the device for attaching the covers to the housing in the assembled position.

Known devices have several disadvantages. The device case is equipped with only one guide rib, the grooves for fastening the bolt head are not equipped with any protective elements that prevent the unauthorized exit of the bolt from the groove, the entry and exit points of the cable have an angle that contributes to the refraction of the cable and its breakage. Thin-walled covers are made with single-layer ends which are bent and are connected to the base by welding. This design makes it impossible to use high-strength steels for the manufacture of caps. Thus, the reasons that impede the achievement of the following technical result when using known devices include the unreliability of the design.

The essence of the proposed tread for protecting the power cable in the well is that the tread case (1st option) is stamped, equipped with two guide ribs, groove amplifiers and groove guard ribs, as well as cable entry and exit guide elements from the cable channel of the housing, with the help of which the necessary clearance b between the tubing is established, depending on the thickness of the cable used.

The folding arcuate clamping brackets are made of two layers, and the ends of the brackets are attached to each other by means of a T-shaped connection from the inside and directed towards the tubing.

The fixing bolt is equipped with a protective cover.

The tread case (2nd option) is cast, equipped with four guide ribs and groove guard ribs, as well as cable entry and exit guide elements from the cable channel of the housing.

Using the proposed invention provides the following technical result: improving the reliability of the design.

The specified technical result during the implementation of the invention is achieved by the fact that the housing is made integrally with the cable channel and with a central channel with a size equal to the outer diameter of the tubing for fixing the tread housing to the coupling connection, folding arched clamping brackets one end of which is made with a loop-shaped end with the possibility of rotation on the axis, which passes through a loop-shaped bracket, and the second is fastened by means of a bolt to the body.

The peculiarity lies in the fact that the tread case (1st option) is stamped, equipped with two guide ribs, groove amplifiers and groove guard ribs, as well as cable entry and exit guide elements from the cable channel of the housing, with which the necessary clearance b between Tubing depending on the thickness of the cable used.

The folding arcuate clamping brackets are made of two layers, and the ends of the brackets are attached to each other by means of a T-shaped connection from the inside and directed towards the tubing.

The fixing bolt is equipped with a protective cover.

The tread case (2nd option) is cast, equipped with four guide ribs and groove guard ribs, as well as cable entry and exit guide elements from the cable channel of the housing.

An analysis of the prior art by the applicant, including a search by patents and scientific and technical sources of information and identification of sources containing information about analogues of the claimed invention, allowed to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention. The definition from the list of identified analogues of the prototype as the closest in the set of essential features of the analogue allowed us to identify the set of essential distinguishing features in relation to the applicant's technical result in the claimed invention set forth in the claims.

Therefore, the claimed invention meets the condition of "novelty."

The design of the invention is presented in figures 1-11.

Figure 1 shows a view of the device with a stamped case in the assembled position from the side of the Central channel (option 1).

Figure 2 is a view And on the device of the locking connection of the folding arched clamps.

Figure 3 shows a view of the device in a disassembled position from the side of the Central channel.

Figure 4 is a section bB along the axis of attachment of the folding arched clamping clamp.

Figure 5 - section bb along the axis of the tread housing.

Figure 6 is a side view of G on the device.

7 is a section DD on the axis of the mounting bolt

On Fig - view E of the device from above (the left hinged arched clamp bracket is folded).

Figure 9 shows a view of the device with a molded case in the assembled position from the side of the Central channel (option 2).

Figure 10 is a side view of the device G (option 2).

11 is a view of And on the device from above (the left hinged arched clamp bracket is folded down) (option 2).

First option. The device includes a stamped housing 1, made as a whole with a cable channel 2 and with a Central channel with a size of the outer diameter of the tubing to fix the tread housing on the coupling connection. The housing 1 is equipped with two grooves with open circuits 3, two grooves with closed circuits 4, two guide ribs 5, amplifiers 6 grooves 4, guiding elements 7 of the input and output of the power cable 8 from the cable channel of the device.

In the grooves 3, by welding, loop-shaped staples 9 are fixed in which, by means of the axis 10, the folding arched clamp-shaped clamps 11 are fastened 11. The ends of the folding arched clamp-shaped clamps are fastened using the locking T-shaped joint 12. The second end of the folding arched clamp-shaped clamp is equipped with a special nut 13 in which screw the mounting bolt 14. Moreover, the working part of the bolt is protected by a cover 15. In addition, the housing 1 in the area of the grooves 4 is equipped with guard ribs 16.

The second option. The device includes a cast housing 17 made integrally with the cable channel and with a central channel the size of the outer diameter of the tubing to fix the tread housing to the coupling connection. The housing 17 is equipped with four guide ribs 18, guard ribs 19, guide elements 20 of the input and output of the power cable from the cable channel of the device.

The device operates as follows. The tread housing 1 (second variant of pos. 17) is mounted on the tubing string so that the folding arcuate clamping clamps 11 are located above and below the tubing coupling. The tread is fixed on the NTK with the help of hinged arched clamping clamps 11. In this case, the bolts 14 are inserted into the groove 4 and then tightened until the device body and the folding arched clamping clamps are fully tightened to the tubing string. The grooves 4 for the purpose of amplification are equipped with amplifiers of the grooves 6, and to prevent unauthorized exit of the bolts 14 from the grooves 4, the latter are equipped with shielding ribs 16 (the second option pos.19). To prevent contamination of the threaded surface of the bolts 14 during operation, the latter are equipped with protective covers 15.

In order to strengthen the design of the folding arcuate clamping brackets 11, the latter are made two-layer, and the ends of the brackets are attached to each other by means of a T-shaped connection 12, which makes it possible to make brackets of any structural steel.

To direct the device in the pipe, the housing of the device 1 is equipped with guide ribs 5 (the second option pos.18).

To prevent sharp bends of the power cable 8 when entering and leaving the housing 1, the latter is equipped with guiding elements 7 (the second option pos.20) of the input and output of the power cable 8 from the cable channel of the device. These elements allow you to use the entire range of cables used, since the gap b between the tubing and the guiding elements 7 is set individually by order of the Consumer. In addition, the elements 7 prevent movement of the cable in the housing in both longitudinal and transverse directions.

Thus, the proposed device allows to simplify the design of the tread and increase its reliability, reduce the time of assembly, disassembly and installation on the tubing.

The above description indicates that when using the claimed invention, the following combination of conditions:

- a tool embodying the claimed invention, in its implementation is intended for the oil and gas industry and can be used to protect the power cable of the pump from mechanical damage during descent - lifting the suspension of the tubing with the installation of an electric centrifugal pump in vertical, directional and horizontal wells;

- for the claimed device in the form described in the claims, the possibility of its implementation using the means and methods described in the application is confirmed;

- a tool embodying the claimed invention in the implementation, is able to ensure the achievement of the perceived by the applicant of the assigned technical tasks. Therefore, the claimed invention meets the condition of "industrial applicability".

Claims (4)

1. The protector for protecting the power cable in the well, comprising a housing made integrally with the cable channel and with a central channel with a size equal to the outer diameter of the tubing for fixing the tread housing to the coupling connection, folding arched clamping clamps, one end of which is made with a loop-shaped end rotatably on an axis that passes through a loop-shaped bracket, and the second is bolted to the housing, characterized in that the tread housing is stamped, equipped with mja guide ribs, grooves and protective amplifiers ribs grooves and the guide elements of the entrance and exit of the cable from the cable channel housing in which is set the desired gap b between the tubing depending on the thickness of cable used. 2. The tread according to claim 1, characterized in that the folding arcuate clamping brackets are made of two layers, and the ends of the brackets are attached to each other by means of a T-shaped connection from the inside and directed towards the tubing. 3. The tread according to claim 1, characterized in that the mounting bolt is equipped with a protective cover. 4. The tread according to claim 1, characterized in that the tread body is cast, equipped with four guide ribs and groove guards, as well as cable entry and exit guide elements from the cable channel of the housing.

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