RU215123U1 - PROTECTOR FOR PROTECTION OF ELECTRIC CABLE IN A WELL - Google Patents

Abstract

The utility model relates to the oil and gas industry and can be used to protect an electrical cable from mechanical damage during the lowering and retrieval of a tubing suspension with the installation of electrical equipment in vertical, directional and horizontal wells. Protector for protection of electric cable in the well consists of a body with a longitudinal chute for laying the cable, side guides of the body and two clamping clamps. The side guides are made in the form of radial beds for the size of the tubing. The clamping clamps are made in the form of a tape for fixing the body on the tubing. At the ends of the side guides of the body, transverse grooves are made to prevent axial movement relative to the body of the clamping collars. In the middle part of the body, radial grooves are made that fit the tubing sleeve. The protector is made in the form of a single assembly by casting from an impact-resistant polymer material. EFFECT: increased reliability of the device. 1 w.p. f-ly, 5 ill.

Description

The utility model relates to the oil and gas industry and can be used to protect an electrical cable from mechanical damage during the lowering and retrieval of a tubing suspension (tubing) with the installation of electrical equipment in vertical, directional and horizontal wells.

Known protector for attaching the cable to the tubing (patent RU No. 166515, IPC E21B 17/00, publ. pipe connection, the body is made in the form of a U-shaped metal profile, the vertical generatrices of which are set apart at an angle to the sides and rest on the side surface of the pipe, cutouts are made on them for the sleeve, and the height of the cable channel along the edges of the body and opposite the sleeve is equal to the size of the cable and increases on both sides of the body towards the coupling, the fixing elements are made in the form of a metal tape passing through rectangular holes made in the body, the length of the cutout for the coupling on the vertical generatrix of the profile is greater than the length of the coupling, the vertical generatrix of the U-shaped profile are separated to the sides at an angle of 5 ° up to 15°, and the edges of the rectangular holes through which the metal tape of the protecto fastening passes ra on the pipe, rounded.

The disadvantages of the known device are a high profile made of metal (steel), which leads to high friction against the walls of the production string of the well in the process of lowering the tubing and susceptibility to corrosion processes. In addition, the protector cannot be used in wells with high temperatures, as well as the products of which contain aggressive components - hydrogen sulfide and carbon dioxide, which leads to a limitation in the operational capabilities of the protector.

A protector is known for protecting a power cable in a well (patent RU 2627523, IPC E21V 17/10, published date 08.08.2012), taken as a prototype, containing a housing with a longitudinal chute for laying the cable and two clamps, in the housing on both sides are made transverse grooves, and the side guides of the housing are made in the form of radial beds for the size of the tubing, the side guides are reinforced with transverse ribs located on the sides of the transverse grooves, the clamps are made in the form of a tape inserted into the transverse grooves of the housing, and with a special device they are stretched and clamped in lock. Side guides in the middle part of the body are cut to form a transverse groove that limits the axial displacement of the protector relative to the tubing.

The known device has the following disadvantages:

- the complexity of the device in terms of making transverse grooves of a certain size for installing clamps of a given tape width, not allowing the use of clamps of different tape widths, which complicates the assembly of the device and limits the functionality of the protector;

- low reliability of the device, since the transverse ribs installed around the perimeter perpendicular to the pipe axis can be damaged during the tubing trip, which can lead to cable damage and electrical equipment failure;

- making a transverse groove formed by a cutout in the middle part of the body of the side guides reduces the strength of the tread, namely, it reduces the resistance of the tread to impact loads during the lowering and raising of the tubing hanger, leading to deformation of the longitudinal trough and damage to the power cable, which reduces the reliability of the device;

- a protector made of metal is susceptible to corrosion, cannot be used in wells with high temperatures, and also the products of which contain aggressive components - hydrogen sulfide and carbon dioxide, which reduces its reliability and leads to a limitation of its operational capabilities.

The objective of the utility model is to create a simple and reliable protector for protecting an electrical cable in a well.

The technical result obtained by solving the problem is to increase the reliability of the device by simplifying it.

The technical result is achieved by the fact that in the protector for protecting an electric cable in a well, containing a body with a longitudinal groove for laying the cable, side guides of the body, made in the form of a radius bed for the size of the tubing, two clamping clamps, made in the form of a tape, for for fixing the body on the tubing, according to the utility model , transverse grooves are made at the ends of the side guides of the body to prevent axial movement of the clamping clamps relative to the body, radial grooves are made in the middle part of the body, fitting the tubing sleeve, the protector is made in the form of a single assembly by casting from impact resistant polymer material.

The technical result is also achieved by the fact that the side parts of the body are made flat with bevel angles of not more than 11 degrees.

The execution of transverse grooves at the ends of the side guides of the body prevents axial movement of the clamping collars relative to the body, increasing the reliability of fixing the protector body to the tubing.

The execution in the middle part of the radial grooves, fitting the tubing sleeve, makes it possible to increase the reliability of the protector fixing on the tubing, limiting the axial displacement of the protector relative to it.

The implementation of the side parts of the tread body is gentle with bevel angles of no more than 11 degrees, which makes it possible to reduce shock loads (ricochet, rebound) when the unit moves in the borehole channel, thereby protecting the electric cable from damage, which increases the reliability of the proposed protector.

In the process of lowering and retrieving the tubing hanger, the tubing beats against the walls of the casing string. Collisions can occur both with the cavity of the casing pipe and with the joints between the pipes of the casing string. The trapezoidal, flat shape of the protector with bevel angles of no more than 11 degrees makes it possible to reduce the rebound force, thereby reducing the number of collisions in the process of lowering and raising the tubing, while maintaining the integrity of the protector and the protected cable, which was tested empirically. Increasing the bevel angles of the protector body more than 11 degrees can provoke the rebound force of the protector in the horizontal plane, which will lead to the destruction of the protector and damage to the cable.

The implementation of the protector in the form of a single assembly by casting from an impact-resistant polymer material increases the reliability of the device, making it possible to exclude deformation of the device during operation and, as a result, increase the reliability of the protection of the electric cable.

In the process of lowering and lifting the tubing suspension, the cast protector body made of impact-resistant polymer reduces the coefficient of friction, endures repeated shock loads without damage, reduces the heating of the device itself, eliminating deformation and failure of the power cable. The polymer body can be used in wells with high temperatures containing aggressive components, increasing its operational capabilities compared to steel counterparts.

Compliance of the claimed utility model with the criterion of "industrial applicability" is shown on the example of a specific design of a protector for protecting an electric cable in a well.

In FIG. 1 shows a general view of the protector, Fig. 2 - section A-A of the device, in Fig. 3 - section B-B with the location of the cable in the longitudinal gutter, in Fig. 4 shows an isometric view of the device with a cable and a piece of tubing, FIG. 5 shows an isometric view of the seats of the electric cable and the tubing sleeve.

The protector for protecting the electric cable in the well contains a body 1 (Fig. 1) made as one piece with a longitudinal groove 2 (Fig. 2) for installing an electric cable 3. The side parts of the body are made flat with bevel angles and not more than 11 degrees. The side guides 4 of the body 1 are made in the form of a radial bed for the size of the tubing 5. At the ends of the side guides 4, transverse grooves 6 are made (Fig. 1 and Fig. 4) to prevent axial movement relative to the body 1 of the clamping clamps 7. In the middle part The body 1 has radial grooves 8 that fit the sleeve 9, which limit the axial displacement of the protector relative to the tubing 5. The protector is made in the form of a single assembly by casting from an impact-resistant polymer material.

The device works as follows.

The protector is installed on the tubing 5 so that the radial grooves 8 are located on the sleeve 9. This prevents axial movement of the protector along the tubing. Then, clamps 7 are installed on the transverse grooves 6, which wrap around the cable 3 and the tubing 5 and with a special device are pulled and clamped into an unopenable lock.

The claimed device makes it possible to use any known electrical cable used when lowering electrical equipment into the well, to simply and reliably fix the protector with clamps of various widths on the surface of the tubing.

After removing the tubing from the well, or any preventive measures associated with lifting, the clamps 7 are cut and removed. The protector body is used repeatedly.

Thus, the proposed device makes it possible to simplify the design of the protector, reduce the time of assembly and installation of the protector on the tubing, and increase reliability.

Claims (2)

1. A protector for protecting an electric cable in a well, containing a body with a longitudinal groove for laying the cable, side guides of the body, made in the form of radial beds for the size of the tubing, two clamping clamps, made in the form of a tape, for fixing the body to the tubing compressor pipe, characterized in that transverse grooves are made at the ends of the side guides of the casing to prevent axial movement relative to the casing of the clamping clamps, radial grooves are made in the middle part of the casing, fitting the tubing sleeve, the protector is made in the form of a single assembly by casting from impact-resistant polymer material. 2. Protector according to claim. 1, characterized in that the side parts of the body are made flat with bevel angles of not more than 11 degrees.

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