SU1259381A1 - Device for fixing cable to in-well pipeline - Google Patents

Abstract

This invention relates to the field of electrical engineering. The purpose of the invention is to improve the operating conditions by reducing the piston effect. The device contains a metal case (K) 1 with a longitudinal channel for the pipeline (TT) 3 and an open longitudinal groove, the edges of which are designed to protect the cable 7 from mechanical damage. In K 1, there is also an additional longitudinal through groove communicating with a channel for T 3, consisting of pipes 4. An additional groove may connect the channel for T 3 with an open through groove. When descending into the borehole 22 T 3 with a 7 K 1 cable, an additional groove is put on the pipe 4 above the coupling 5 and goes down along T 3 until the shoulder stops on the inner surface K 1 from one of the ends in the zone of the cylindrical section of the channel coupling 5. Cable 7 is inserted into the groove between the ribs and fastened with clips 23. Then, K 1 is fixed to T 3. This embodiment reduces the cross section of the device and reduces the piston effect while maintaining reliable fixation from transverse movements K 1 on coupling 5, which provides s shield cable 7 disposed within the groove, from contact with the walls of the borehole 22. z.p.f 1-ly, 12 yl. u (L to ate; oo 00

Description

The invention relates to electrical engineering and can be used to fasten a cable to a pipeline running into a well.

The purpose of the invention is to improve the operating conditions by reducing the piston effect.

FIG. 1 shows a device for fastening a cable to a pipeline placed in a well, a general view; in fig. 2 - the same, longitudinal section; in fig. 3 and 4 are embodiments of the device; in fig. 5 and 6 - the same view. above, respectively; in fig. 7 is a view A of FIG. 2; in fig. 8 is a view B in FIG. 2; in fig. 9 is a section bb of FIG. 2; in fig. 10 shows a section of YYY in FIG. five; in fig. 11 is a section d-d in FIG. ten; in fig. 12 shows a device for fastening a cable to a pipeline placed in a well in a working position.

The metal case 1 of the device has a longitudinal channel 2 for a pipeline 3 consisting of pipes 4 and connecting sleeves 5, and an open longitudinal groove 6, which completely includes cable 7 of any configuration. The body 1 also has a longitudinal through groove 8, which communicates with the longitudinal channel 2. The width of the groove 8 is smaller than the diameter of the channel 2. The 2 channel of the pipe 3 is connected by a longitudinal through groove 8 with an open longitudinal groove b (Fig. 1); In this case, the device body 1 in cross section is C-shaped.

The housing 1 is formed by a part of the hollow cylinder 9 and two ribs 10 and 11 that mate with it, having parallel inner faces. In the upper part of the housing 1, a collar 12 projecting inwardly as part of a ring is formed. The elements of the collar 12 protruding into the channel 2 are limited by a cylindrical surface whose diameter is larger than the outer diameter of the pipe 4 and smaller than the outer diameter of the coupling 5. Hole diameter of a hollow cylinder 9 must be slightly larger than the outer diameter of the coupling 5 ..

In the lower part of the housing 1 there are clamps, made in the form of boss 13 and 14 with threaded holes and movable elements in the form of screws 15 and 16 screwed into these holes, provided with pointed edges 17 and 18. The device case 1 is made with rounded outer edges and sections 19-21 on the ribs 10 and 11 in the cylinder 9 with the collar 12.

The device works as follows. When pipe 3 is lowered into the borehole 22 with a cable 7 on the surface after screwing the pipe 4 into the coupling 5, the device body 1 through the groove 8 is put on the pipe 4 above the coupling 5 perpendicular to the axis of the pipe 3 until the shoulder 12 stops in the pipe 4, then the device body 1 descends down along pipeline 3 as far as the flange 12

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 in the clutch 5, fixing the housing 1 on the clutch 5 from lateral movements. The cable 7 is inserted into the groove 6 between the ribs 10 and 11 and secured to the pipes 4 by means of clamps 23, made, for example, in the form of metal bars with straps, which allow the cable 7 to be pressed against the pipe.

Then the device body 1 is fixed on the pipe 3 by screwing in screws 15 and 16, having a square turn-key hole 24. At the same time, the sharp edges 17 and 18 interact with the pipe 4 and the coupling 5 in such a way that the housing 1 is prevented from turning and rising upwards relative to the pipeline 3. After the housing 1 is fixed on the pipeline, the pipeline 3 with cable 7 is lowered into the well 22. Depending on the geometry of the well 22 and the parameters of the pipeline 3 and cable 7 determine the number of devices required for reliable cable operation for fastening it.

When lifting pipelines 3 with cable 7 from well 22, the work on dismantling the device occurs in the reverse sequence of operations performed. The screws 15 and 16 are unscrewed to a position where they, with their sharp edges 17 and 18, enter the holes in the lugs 15 and 16 of the housing 1, remove the clips 23, the housing 1 is raised upwards along the pipeline 3. to go beyond the limits of the coupling 5 and then remove it from pipe 4 through groove 8.

The proposed design of the housing, compared with the known, allows to reduce the cross-section of the device, creating a piston effect, while maintaining reliable fixation against transverse movements of the housing on the pipeline coupling, which protects the cable located inside the groove from contact with the walls of the well.

Supplying the device body with a collar in the upper part, protruding into the pipeline opening and interacting with the upper edge of the coupling while restricting the housing movement down the pipeline, and installing clamps in the lower part of the housing limiting the movement of the housing upwards and turning it relative to the pipeline. compared with the known cross section of the device, creating a piston effect, while ensuring reliable mounting of the device on the pipeline from continuous movements, since the collar and a casing portion projecting from the movable elements retainers do not project beyond the cross-section of the coupling, ie. e. are in its hydraulic shade.

Making the device body with cuts of edges of the streamlined shape allows reducing hydraulic resistances when the installation is moving in the well fluid, at the same time eliminating the possibility of the installation getting stuck during longitudinal movements in case of unevenness in the well.

In general, a decrease in the piston effect when the installation moves in the well fluid provides acceleration of lifting operations when operating oil wells using submersible electric pump installations.

Claims (1)

1. A device for fastening a cable to a pipeline arranged in a well, consisting of pipes connected by couplings, comprising a housing with a cylindrical section having a longitudinal conduit channel and an open longitudinal groove, the ribs of which are intended to protect the cable from mechanical damage, and a housing fixing unit in a pipeline with movable elements installed in a plane perpendicular to the longitudinal axis of the housing, characterized in that, in order to improve the operating conditions by reducing the pressure threshold effect, the housing is formed with an additional longitudinal through slot which communicates with the channel for the pipeline and having a width mensche channel diameter and intended for cooperating with the clutch inner collar from one of the ends in the zone of the cylindrical section of the channel, while the movable elements of the fixation unit are installed in the housing from the side opposite to the shoulder, with the possibility of placing them on a part of the length in the channel for the pipeline. 2 The device according to claim 1, characterized in that the channel for the pipeline is connected by an additional longitudinal through groove with an open longitudinal groove, the ribs of which are intended to protect the cable, while the casing is made C-shaped in cross section. /one F ///////// 7 ////// // A 20 uz2 Fmg, .3 FIG. eleven YU FIG. five FIG. 6 Vase VidB 12 /five sixteen 3-8 YU FIG. at YYY Fig.E go X / Ш7 ///////// ////// AND FIG. YU m F1AgM