RU52435U1 - CABLE CATTER - Google Patents

Abstract

The proposal relates to the oil industry and is designed to extract a cable or rope from a well. The cable catcher consists of a housing with an adapter in the upper part and a clamp assembly in the lower part. The clamping unit is made in the form of a hollow cylinder with slots made diametrically in it and directed upward from its lower end. On the inner surface of the hollow cylinder, pointed rods are rigidly mounted, which point upward inward. At the top, the hollow cylinder is rigidly connected to the body, and at the bottom it is equipped with a guide funnel. The proposed cable catcher allows you to effectively remove the tattered cable that was tacked in the well, due to the robust design of the clamp assembly, which without loss of operability allows you to apply the necessary force to the tacked cable to tear off the cable after it is captured and fixed, which allows to reduce the repair time and save material and financial expenses.

Description

The proposal relates to the oil industry and is designed to extract a cable or rope from a well.

Known catcher of the rope (patent SU No. 1502806, IPC 7 E 21 B 31/20, publ. BI No. 31 of 08.23.1989), containing a hollow open bottom housing installed in the housing with limited axial movement of the rod with a conical guide head in the lower and upper parts, hinges pivotally mounted on the rod, two-arm levers mounted around the circumference in the body wall and pivotally connected to it by the middle part, while the rod in the initial position is connected to the body by a shear element and is made above the hinge hooks with a conical outer a surface having a larger base in the lower part, and the two-arm levers are mounted with the possibility of interaction with the upper part with the conical outer surface of the rod and have hooks in the lower part whose vertices are directed to the axis of the body and the rod hooks are placed on its conical guide head.

The disadvantage of this device is the design complexity due to the presence of parts that are difficult to manufacture, such as two-arm levers, a rod made with a conical guide head, with articulated hooks placed in it, which require high precision in the manufacture and significantly complicate the assembly, which can only be done in specialized workshops.

The closest in technical essence is a cable catcher (patent SU No. 1615327, IPC 7 E 21 B 31/12, publ. BI No. 47 dated 12/23/1990), including a housing with an adapter in the upper part and a conical lower lower part, installed on the outer surface, cable clamping units, containing gripping plates arranged in pairs and forming the working area and fixing elements made in the form of gear dies pivotally connected to the housing; gripping plates made L-shaped with a toothed surface on the upper end,

moreover, one side of the gripping plates is rigidly connected to the housing, and the working area is located in a plane perpendicular to the axis of the housing.

The disadvantages of this device are:

- the complexity of the design inherent in the analogue;

- high metal consumption and, as a consequence, high manufacturing costs, in addition, it is possible for the cable to slide from the catcher in the process of lifting when it is weakly or partially jammed between the gripping plate and the toothed plate, which leads to re-lowering of the catcher, and therefore reduces its efficiency and increases the duration of the repair.

The closest in technical essence is a cable catcher (patent for utility model RU No. 44734 IPC 7 E 21 V 31/12, 31/20 publ. BI No. 9 of 03/27/2005), including a housing with an adapter in the upper part and a unit cable clamping in the lower part, and the cable clamping unit is made in the form of a spring having the shape of a truncated cone, expanding from top to bottom, while an annular selection is made in the body of the housing, in which the upper end of the spring is rigidly fixed; in addition, on the outer surface, the housing is equipped with an annular stop, which prevents the cable from penetrating above the device, the outer diameter of the annular stop being equal to the diameter of the last free coil of the spring.

The disadvantage of this design of the device is that after the clamping unit fixes the cable removed from the well, the device starts to pull up, and if the cable is tacked in the well, the spring acting as the clamping unit is straightened by the pulling force applied to the device, and the cable breaks from the spring and remains in the well, as a result, the clamping unit loses its functionality, and the device fails, while the cable to be removed remains in the well, in connection with this, the use of this device and not effective in those wells where prihvachen cable.

The objective of the utility model is to increase the efficiency of the device when removing the cable tacked in the well.

This problem is solved by the proposed cable catcher, including a housing with an adapter in the upper part and a cable clamp assembly in the lower part.

What is new is that the clamping unit is made in the form of a hollow cylinder with slots made diametrically in it and directed upward from its lower end, while on the inner surface of the hollow cylinder, pointed rods are rigidly mounted, with the tip pointing upward inward, with the hollow cylinder on top rigidly connected to the housing, and equipped with a guide funnel from below.

In FIG. Shows a general view of the cable catcher.

The cable catcher (see Fig.) Consists of a housing 1 with an adapter 2 in the upper part and a clamp assembly 3 in the lower part. The clamping unit 3 is made in the form of a hollow cylinder 4 with slots 5 made diametrically in it and directed upward from its lower end. On the inner surface of the hollow cylinder 4, pointed rods 6 are rigidly mounted, which point 7 is directed upward inward.

From above, the hollow cylinder 4 is rigidly connected to the housing 1, and from below it is equipped with a guide funnel 8.

The cable catcher operates as follows.

The cable catcher (for example, to remove the dangling cable of the installation of an electric centrifugal pump stuck in the well) is connected via an adapter 2 (see Fig.) To the tubing string (tubing) 9 and lowered from the well until the clamp assembly 3, made in the form of a hollow cylinder 4 does not rest against a dangling cable (not shown in FIG.), as evidenced by a drop in the weight indicator installed on the wellhead (not shown in FIG.).

Then the tubing string 9 is raised 1-2 meters up, and therefore the cable catcher. After that, the tubing string 9 is repeatedly lowered downward, while rotating it clockwise, while the clamping unit 3, made in the form of a hollow cylinder 4, rigidly connected to the housing 1, also rotates and picks up a torn cable with its guide funnel 8 the slots 5 of the hollow cylinder 4. The rotation of the tubing string 9 continues, while the dangling cable falling into the slots 5 of the hollow cylinder 4 begins to be wound on the surface of the hollow cylinder 4 and clings to the tip 7 of the rods 6, rigidly mounted on the inner turn the hollow body 4. As a result, the dangling cable is fixed on the rods 6 of the clamping unit 3. The rotation of the tubing string 9 stops and begins to smoothly lift the tubing string 9 upward, applying force

directed upward and sufficient to tear off a torn cable caught in the well, and the force applied to the tubing string 9 is monitored by the weight indicator installed at the wellhead. After tearing, a dangling cable caught in a well, it is removed to the surface.

The proposed cable catcher allows you to effectively remove the tattered cable that was tacked in the well, due to the robust design of the clamp assembly, which without loss of operability allows you to apply the necessary force to the tacked cable to tear off the cable after it is captured and fixed, which allows to reduce the repair time and save material and financial expenses.

Claims (1)

A cable catcher comprising a housing with an adapter in the upper part and a cable clamping unit in the lower part, characterized in that the clamping unit is made in the form of a hollow cylinder with slots made diametrically in it and directed upward from its lower end, while on the inner surface of the hollow sharpened rods are rigidly mounted, the tip pointing upward inward, with the hollow cylinder being rigidly connected to the body from above and equipped with a guiding funnel from below.