Device used to protect cables and connect them to pipelines

Abstract

The present invention relates to a device for protecting a cable power line of a submersible motor for driving a centrifugal pump for producing oil and other formation fluids. The device comprises: a housing having a groove for accommodating a cable, and two clips arranged on the edge of a first side wall of the housing. Each clip has one end hinged to the first side wall of the housing and the other end hinged to a corresponding lock. Each lock comprises a connecting ring with a protrusion, and each clip comprises a groove and a thrust protrusion corresponding to the protrusion of the connecting ring. Each lock also comprises a connecting protrusion, and when the lock and the housing are pulled together, the connecting protrusion forms a rigid connection with the second side wall of the housing.

Description

Technical Field

[0001] The present invention relates to a safety device for cable power lines of submersible motors used as drivers of centrifugal pumps for producing oil and other formation fluids, control lines of various downhole tools, signal cables, pipelines for liquids, steam or chemicals, optical fiber lines and flexible trailing cables. The present invention can be used in the oil and gas industry to protect various cable lines and connect them to wellbore pipes and production pipes and casings. Background Art

[0002] RU859594 discloses a device for connecting a power cable to a wellbore pipe, which is used in an oil pipe string. The device comprises: a one-piece housing with a longitudinal groove, in which the power cable of the motor is laid; windows for fixing the device to the upper and lower ends of the buckle, the windows being arranged at a height not lower than the buckle; and a tie connecting the upper and lower parts of the housing.

[0003] The disadvantages of the device known from RU859594 are as follows: the impossibility of reusing the thrust spring due to wax and salt deposits on it, and low operational reliability due to high shock loads during reciprocating operations, which lead to opening of the housing and blocking of the device between the tubing and casing string.

[0004] RU2108439 discloses a device for connecting a power cable to a wellbore pipe. The device comprises: a one-piece housing with a longitudinal groove in which the power cable of the motor is laid; windows for fixing the device at the lower and upper ends of the buckle, the windows being arranged at a height not lower than the buckle; and ties connecting the upper and lower parts of the housing, the upper and lower parts of the housing being equipped with corresponding upper and lower covers, both of which are mounted on hinges and have screws for connecting to corresponding threaded holes formed in the upper and lower parts of the housing. The ratio of the window height to the cover width exceeds 2:1.

[0005] The disadvantage of the device known from RU 2108439 is its low reliability, which is caused by the fact that the connection of the cover and the screw can be damaged during the round-trip operation due to the contact of the device elements with the wall and joints of the production pipe. The device also has a disadvantage of a large cross section, which reduces the free cross section of the well and hinders the cross flow of well fluids during the round-trip operation.

[0006] US2018 / 0355679A1 discloses a device for protecting and connecting a cable to a pipeline. It is used for various pipelines, including liner-tail pipes, extension pipes. The device for protecting and connecting a cable to a pipeline consists of 3 parts, one of which is configured for threaded connection: - rod; - cable trough (cable channel); - trough and rod connected by snap-fit, which allows several degrees of freedom to be set for easy connection. The rod and the trough are connected by threaded connection.

[0007] Disadvantages of the device known from US 2018 / 0355679 A1 are its low design reliability during operation of the device, and its large size due to the external arrangement of the bolted connections, which also increases the likelihood of the device getting stuck in the well and hindering the cross-flow of well fluids. Summary of the invention

[0008] The technical effect of the present invention is to improve the reliability of the device for protecting the cable and connecting the cable to the pipeline.

[0009] The technical effect is achieved by the proposed device for protecting a cable and connecting it to a pipeline. The device includes a housing having a groove for a cable. The housing has a snap-on arranged along the edge of a side wall of the housing. One end of the snap-on is pivotally connected to a first side wall of the housing, and the other end of the snap-on is pivotally connected to a corresponding lock. The lock includes a connecting ring having a protrusion, and the snap-on has a recess corresponding to the protrusion and a thrust protrusion. The other end of the lock includes a protrusion, and when the lock and the housing are locked by screwing a bolt into a nut installed in a groove having a stop protrusion formed in the lock, the protrusion forms a rigid connection with the second edge of the side wall of the housing.

[0010] The device is also characterized in that the second edge of the side wall has a middle portion, which is provided with a recess for fixing the bolt. A groove with a stop protrusion for a nut is formed in the middle of each lock. The upper and bottom portions of each lock have a slope of less than 30 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is described with reference to the accompanying drawings, in which:

[0012] Figure 1 A view showing a device,

[0013] Figure 2 shows a side view of the device,

[0014] Figure 3 shows a nut,

[0015] Figure 4 Showing the connection between the lock and the buckle, view A,

[0016] Figure 5shows the lock,

[0017] Figure 6 Showing the connection between the lock and the buckle, view B,

[0018] Figure 7 The device for protecting and connecting a cable to a pipeline is shown in the open state,

[0019] Figure 8 The installation of a device for protecting and connecting cables to pipes is shown in a top view.

[0020] Fig. 9 The installation of the device for protecting and connecting a cable to a pipe is shown in a side view in the assembled state,

[0021] Fig.10 The device for protecting a cable and connecting it to a pipe is shown in a side view in the assembled state.

[0022] Fig.11 Along Fig.10 The sectional view taken along line AA in FIG. 1 shows the device for protecting the cable and connecting the cable to the pipeline in the assembled state,

[0023] Fig.12 Along Fig.10 The sectional view taken along line BB in FIG. 1 shows the device for protecting a cable and connecting the cable to a pipe in an assembled state. DETAILED DESCRIPTION

[0024] A device for protecting a cable and connecting it to a pipeline, comprising two locks 1, two buckles 2 and a housing 3 with a cable groove. The buckles 2 are arranged along the edge of the side wall of the housing 3. One end of the buckle 2 is pivotally connected to the first side wall of the housing 3, and the other end of the buckle 2 is pivotally connected to the corresponding lock 1. The lock 1 includes a connecting ring 10 with a protrusion 11, and the buckle 2 has a recess 16 corresponding to the protrusion and a thrust protrusion 15 with a hole. The other end of the lock 1 includes a protrusion 12, and when the lock 1 and the housing 3 are connected by screwing a bolt 5 into a nut 4 with a threaded hole 7 and a recess 8 (see Figure 3 ) and locked, the protrusion 12 forms a rigid connection with the second edge of the side wall of the housing 3. The nut 4 is installed in a groove with a stop protrusion 9 formed in the lock 1.

[0025] By combining the recess 8 and the projection 9, the nut 4 is installed in the lock 1 from the inside. After the nut 4 is installed in the lock 1, the nut 4 is rotated (see Figure 5 ). After the bolt 5 is screwed into the nut 4, the protrusion 9 does not allow the bolt connection to fall off from the housing. In this case, the movement of the nut 4 in the lock 1 is restricted and can only rotate around its axis.

[0026] By holding the nut 4 by means of the protrusion 9 of the lock 1, the overall size diameter of the device can be reduced by creating a minimum gap between the connection point of the bolt 5 with the round nut 4 and the tube 19 on which the device slides. Due to the minimum distance between the nut 4 and the tube 19, the bolt connection is in close proximity to the tube (see Figure 2 ), which improves the reliability of the design.

[0027] By forming a slope 13 in the range of 10 to 35 degrees on the upper and lower parts of the lock 1 (see Fig. 9 ) Eliminates equipment adhesion during downhole operations, which improves the reliability of the design.

[0028] Install the nut 4 from the inside of the lock 1 so that the outer surface is smooth (see Figure 7 , 8, 9, 10), eliminating equipment adhesion during downhole operations, which improves the reliability of the design.

[0029] like Figure 4 , 5 As shown in Figures 6, 7, 8, 9, and 11, the lock 1 includes a connecting ring 10 with a protrusion 11 to form a rigid connection with the buckle 2 when it is installed on the pipe 19. When the device is installed on the pipe 19, the protrusion 11 of the lock 1 falls into the recess 16 of the buckle 2 and prevents the device from being opened arbitrarily on the pipe, forming an angle greater than 200 degrees between them, which prevents the device from falling off the pipe 19 arbitrarily. The arrangement of the protrusion 11 of the connecting ring 10 of the lock 1 in the recess 16 of the buckle 2 allows to improve the ergonomics of the device and facilitates the installation / removal of the device. When installed on the pipe 19, since the protrusion 11 provided in the recess 16 prevents the device from being opened arbitrarily, the device is engaged with the pipe 19 through the lock 1 and the buckle 2, and the device can be released and cannot be held in the hand. Afterwards, the cable 21 can be placed in the protective groove of the housing 3 and the device can be fixed by pressing the housing 3 with the cable 21 onto the tube 19 and inserting the bolt 5 into the groove 17 provided in the housing 3, which increases the reliability of the connection between the lock 1 and the buckle 2 while forming an additional transverse connection between them.

[0030] like Figure 5 , 7 As shown in Figures 8, 9 and 11, the lock 1 includes a protrusion 12, and when the lock 1 and the housing 3 are tightened by the bolt 5, the protrusion 12 forms a rigid connection with the housing 3. The arrangement of the protrusion 12 of the lock 1 in the recess of the housing 3 allows the formation of an additional transverse link while increasing the reliability of the connection between the lock 1 and the housing 3. At the same time, the protrusion 12 of the lock 1 covers the bolt 5, shielding it from the influence of the well fluid flow in the annular space, thereby protecting the bolt 5 from erosion.

[0031] like Figure 6 , 12As shown, the bolt 5 has a recess 18 at its end. After the bolt 5 is installed in the nut 4 of the lock 1, the end of the bolt 5 is expanded, thereby providing a captive connection that ensures the reliability of the connection. Providing the recess in the bolt 5 can protect the connection, that is, prevent the bolt 5 from falling off the nut 4.

[0032] like Figure 4 , 6 As shown, the clip 2 has a ring 14 along its edge and connects the lock 1 and the housing 3 via a pin 6. The clip 2 includes a thrust projection 15 with a hole. By means of this projection 15, the device rests on a sleeve 20 of a pipe 19 from two opposite sides. After the connecting pins 6 are installed, they are bent towards the pipe 19 and are hidden in the dimensions of the sleeve 20, thus protecting the connecting pins 6 from falling out.

[0033] In this design, the lock 1, the clip 2 and the housing 3 with the slot for the cable are universal elements that can be installed on pipes of different diameters by adjusting the size of the device using the connecting clip 2.

Claims

1. A device for protecting a cable and connecting it to a pipeline, the device comprising: a housing having a slot configured to receive a cable, the housing having a first side wall and a second side wall; two clips arranged on the edge of the first side wall of the housing, and Two locks including a connecting ring with a protrusion; wherein each of the buckles has a first end pivotally connected to the first side wall of the housing and a second end pivotally connected to a corresponding lock of the two locks, Each of the buckles comprises a groove and a thrust protrusion corresponding to the protrusion of the connecting ring of the corresponding lock, wherein each of the locks further comprises a recess having a retaining protrusion, the recess being configured to receive a nut; wherein each of the locks further comprises a connecting protrusion configured to form a rigid connection with the second side wall of the housing when the lock and the housing are tightened by screwing a bolt into the nut mounted in the groove; and Each of the locks has an upper portion, a middle portion and a lower portion, the groove is arranged in the middle portion, and both the upper portion and the lower portion have a downward slope with an angle of 10 to 35 degrees relative to the middle portion.

2. The device according to claim 1, characterized in that The second side wall of the housing includes a recess for receiving a connecting protrusion of each lock.

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