RU55851U1 - PIPE FOLDING DEVICE - Google Patents

Abstract

The proposal relates to the drilling and overhaul of wells and is intended, in particular, for flaring pipes when they are installed in the well. A device for expanding pipes includes a housing with a central channel, threads for connection with downhole equipment and recesses on the outer surface in which the rollers are placed. Above the recesses with rollers are additional recesses in which the rollers are installed in parallel or with a slight deviation from parallelism to the central axis of the device with the possibility of rotation. Above the additional recesses, the casing is equipped with an annular selection for a tight connection with flared pipes. The proposed design of the device allows you to install devices from flared pipes in one tripping operation while improving the quality of flared pipes. The design of the device is also more technological, simple and, as a result, cheaper both in manufacturing and in maintenance. 2 ill. for 1 liter

Description

The proposal relates to the drilling and overhaul of wells and is intended, in particular, for flaring pipes when they are installed in the well.

It is known "Device for flaring pipes" (RF patent No. 2144128, E 21 B 29/10, publ. Bull. No. 1 from 01/10/2000), comprising a housing with a central channel, coupling and nipple ends with threads for connecting to the borehole equipment and recesses in the wall, in which the rollers are placed, mounted on axes inclined with respect to the axis of the housing with a gap between their side surface and the walls of the recesses, while the recesses for placing the rollers are made in the form of longitudinal cylindrical drills and grooves in the wall of the housing so that big h Part of the lateral surface of the rollers is covered by the walls of these drills or grooves, and the axes of the rollers are detachably fixed with their ends in the housing, and their other ends are equipped with shanks located in cylindrical drillings or grooves and forming a common conical surface with the surface of the nipple end of the housing not affected by them, on which made nipple thread.

The disadvantages of the device are:

- the complexity of manufacturing and, as a consequence, the high material costs of manufacturing;

- high radial loads directly on the axis, significantly reducing their service life;

- low quality flared pipes, as the rollers of the device are equipped with narrow calibrating sections;

- the need to lower the device into the well on the second run after installing flared pipes, as there is no node for a tight connection with flared pipes.

Closest to the utility model in technical essence is the “Device for pipe expansion” (RF patent No. 2191883, E 21 B 29/10, publ. Bull. No. 30 dated 10.27.2002), including a housing with a central channel, threads for connections with downhole equipment and recesses on the outer surface, in which rollers are mounted on axles, the upper ends of which are fixed

in the housing is detachable, and the lower ones are installed in supports placed in the housing using hinges with the possibility of turning them in a plane passing through the longitudinal geometric axes of the housing and rollers.

The disadvantages of the device are:

- the complexity of manufacturing and, as a consequence, the high material costs of manufacturing;

- high radial loads directly on the axis, significantly reducing their service life;

- low quality flared pipes, as the rollers of the device are equipped with narrow calibrating sections;

- the need to lower the device into the well on the second run after installing flared pipes, as there is no node for a tight connection with flared pipes.

The technical task of the proposed utility model is to create simple and cheap to manufacture, maintain the structure with improved working qualities.

The technical problem is solved by a device for expanding pipes, including a housing with a Central channel, threads for connecting with downhole equipment and recesses on the outer surface in which the rollers are placed.

What's new is that the case is equipped with additional recesses for additional rollers located above the recesses, with additional rollers mounted in parallel or with a slight deviation from parallelism to the central axis of the device with the possibility of rotation, while above the additional recesses the case is equipped with an annular selection for tight connection with expandable pipes.

Figure 1 shows the device in the working position with an axial section.

Figure 2 shows a device in connection with flared pipes.

The device for expanding pipes consists of a housing 1 (see Figure 1) with a central channel 2, threads 3 for connecting with downhole equipment and recesses 4 on the outer surface, in which the rollers are placed 5. Additional recesses 6 are located above the recesses 4 with rollers 5 in which the rollers 7 are installed in parallel or with a slight deviation from parallelism to the central axis of the device with the possibility of rotation. The rollers 5 and 7 are installed in the recesses 4 and 6 in such a way that most of the rollers 5 and 7 are covered by recesses 4 and 6, with the exception of the parts protruding outside the housing 1. Above the additional recesses 6, the housing 1 is equipped with an annular selection 8 for connection with

flared pipes 9 (see Figure 2). When expanding the pipes with hydraulic pressure, the cuff 10 provides tightness.

The device operates as follows.

The device is connected to the expandable pipes 9 (see FIG. 2) by upsetting by the shrink ring (not shown in the drawing) the upper end of the pipe 11 into the ring sample 8 of the housing (see FIG. 1) 1 of the device. A device with hermetically connected flared pipes by means of threads 3 of the housing 1 is connected to a drill pipe string (not shown in the drawing), with which it is lowered into the well (not shown in the drawing). Then, thanks to the check valve 12 (see Figure 2), the flared pipes 9 are expanded by the hydraulic pressure created by the injection of fluid through the drill pipes (not shown in the drawing). When expanding the pipes 9 with hydraulic pressure, the cuff 10 provides tightness. After expanding the pipes 9, when a certain value of hydraulic pressure is reached, the device is tensioned through the drill string, while the upset end 11 of the pipes 9 disengages from the annular selection 8 of the device body 1. In this case, the device is freed from the connection with expanded hydraulic pressure (pressed against the well wall) by pipes. After that, the device is given simultaneously rotational and translational motion. As a result, the rollers 5 installed in the recesses 4 of the housing 1 expand the tubes 9 to the required diameter. In this case, the rollers 7 installed in the recesses 6 are calibrated and “smoothed out” previously flared pipes 9 by the rollers 5. Since the rollers 7 are parallel or with a slight deviation from parallelism to the central axis of the housing 1, slippage of the rollers 7 relative to the expandable pipes is excluded 9. The central channel 2 of the device and the non-return valve 12 is used to fill downhole equipment during the descent and circulation of the fluid during pipe expansion 9. After completion of work, the complete device is removed from the wells us. After that, the parts of the device are revised and, if necessary, the worn rollers 5, 7 and cuff 10 are replaced.

The proposed design of the device allows you to install and expand the device from the flared pipes in one round-trip operation while improving the quality of the flared pipes. The design of the device is also more technological, simple and, as a result, cheaper both in manufacturing and in maintenance.

Claims (1)

A device for expanding pipes, comprising a housing with a central channel, threads for connecting to downhole equipment and recesses on the outer surface in which the rollers are placed, characterized in that the housing is equipped with additional recesses for additional rollers located above the recesses, with additional rollers mounted in parallel or with a slight deviation from parallelism to the central axis of the device with the possibility of rotation, while above the additional recesses the body is equipped with an annular 1st sample for tight connection with flared pipes.