RU49092U1 - DEVICE FOR RIPPING PIPES IN A WELL - Google Patents

Abstract

The utility model relates to the drilling and overhaul of wells and is intended, in particular, for expanding expandable devices from profile pipes when installing them in wells. A device for expanding pipes in a well, including a housing with a central channel and threads for connection with downhole equipment. The housing is prefabricated, consisting of an upper housing with a pusher and a lower housing, in which recesses are made on the outer surface, in which rollers are mounted on the axles, the upper ends of which are fixed in the housing demountably with a radial clearance, and the lower ones are installed in the housing supports with using hinges with the possibility of turning them in a plane passing through the longitudinal geometric axes of the housing and rollers. The pusher interacts with the upper ends of the axes of the rollers. The upper and lower bodies are interconnected with the possibility of only axial movement towards each other without depressurization of the central channel. The upper case is equipped with a piston, and the top is equipped with a stop. The lower case on top is equipped with a hydraulic cylinder in which the piston of the upper case is installed. A compression spring is installed between the stop of the upper body and the hydraulic cylinder, and the piston cavity of the hydraulic cylinder is connected to the central channel. The hydraulic cylinder can be locked in the transport position relative to the upper body with a spring-loaded lock that interacts with the central channel using a radial hole. The design of the proposed device for expanding pipes in the well allows to increase the reliability and operability of the device by eliminating emergency situations when removing equipment and to improve the quality of the operations of expanding due to the uniformity of expansion along the entire length of the expandable device.

Description

Device for expanding pipes in a well

The proposal relates to the drilling and overhaul of wells and is intended, in particular, for expanding expandable devices from profile pipes when installing them in wells.

It is known "Device for flaring pipes" (US Pat. RU No. 2191883, E 21 V 29/10, publ. Bull. No. 30 from 10.27.02), including a housing with a Central channel, threads for connection with downhole equipment, and conical a surface with recesses in which rollers are mounted on axles, the upper ends of which are fixed in the housing detachably, and the lower ones are mounted in supports placed in the housing using hinges with the possibility of turning them in a plane passing through the geometric axes of the housing and rollers.

The disadvantage of this analogue are:

firstly, the limited possibility of application, since the outer diameter of the circle described around the rollers, which are not regulated by offset, cannot be larger than the diameter of the well;

secondly, the possibility of accidents in the form of jamming during the descent and ascent of the device in horizontal wells and wells with a complex profile is not ruled out, since they try to take the diameter of the circle described around the rollers as close as possible to the diameter of the well.

The closest in technical essence and the achieved result is a "Device for expanding pipes in the well" (US Pat. RU No. 2235849, E 21 V 29/10, publ. Bull No. 25 from 09/10/04), including a housing with a central channel, threads for connection with downhole equipment and recesses on the outer surface, in which the rollers are mounted on the axles, the upper ends of which are fixed in the housing detachably, and the lower ones are installed in the supports, characterized in that the lower ends of the axes are installed in the bearings located in the housing, using hinges their pivotable in a plane passing through the longitudinal geometric axis of the housing and rollers, the upper ends of the rollers mounted in the housing with radial clearance, and in the central channel of the body

axially spring loaded and having pushers interacting with the upper ends of the rollers.

The disadvantages of this device are:

firstly, the possibility of emergency situations in the form of a danger of jamming of the device in the working position when relieving pressure on the piston (for example, when the spring breaks), since in the working position the diameter of the circle described around the rollers is larger than the diameter of the well;

secondly, uneven expansion of the expandable device along the entire length, since the pressure generated by the mud pumps is not always stable, and the force acting from the walls of the expandable device can exceed the force of the piston acting on the pusher, which ultimately complicates the passage of downhole equipment through expandable device or requires additional operations for flaring.

The technical task of the proposed utility model is to increase the reliability and operability of the device by eliminating emergency situations when removing equipment and improving the quality of flaring operations due to the uniformity of flaring along the entire length of the expandable device.

The technical problem is solved by a device for expanding pipes in a well, including a housing with a central channel, threads for connecting to downhole equipment and recesses on the outer surface, in which rollers are mounted on axes, the upper ends of which are fixed in the housing detachably with a radial clearance, and the lower installed in the supports of the housing with the help of hinges with the ability to rotate them in a plane passing through the longitudinal geometric axes of the housing and rollers, and a pusher interacting with the upper Tsami roller axes.

What is new is that the housing is prefabricated, consisting of an upper housing and a lower housing with rollers, the upper and lower housings being interconnected with only axial movement towards each other without depressurization of the central channel, and the pusher is rigidly connected to the lower part of the upper housing, which also equipped with a piston, and on top with a stop, while the lower case on top is equipped with a hydraulic cylinder in which the piston of the upper case is installed, and a spring is installed between the emphasis of the upper case and the hydraulic cylinder compression, and the piston cavity of the hydraulic cylinder is connected to the central channel.

Also new is the fact that the hydraulic cylinder is locked in a transport position relative to the upper case with a spring-loaded lock in place, which interacts with the central channel using a radial hole.

Figure 1 shows the device in the initial (transport) position with an axial section.

Figure 2 - the device in the working position with an axial section.

Figure 3 is a section aa (see figure 1).

Figure 4 is a section bB (see figure 1).

Figure 5 - section bb (see figure 2).

In Fig.6 is a section GG (see Fig.2).

A device for expanding pipes in a well consists of a housing 1 with a central channel 2 (see Fig. 1), threads 3 and 3 'for connecting to downhole equipment (not shown in Fig.), And recesses 4 (see Figs. 1 and 2) on the outer surface, in which the rollers 5 mounted on the axles 6 are placed, the upper ends 7 of which are fixed in the housing 1 demountably with a radial clearance 8, and the lower 9 are mounted in the supports 10 of the housing 1 using hinges 11 with the possibility of rotation in the plane F ( see figure 3) passing through the longitudinal geometric axis of the housing 1 and the rollers 5, and t a pusher 12 (see FIGS. 1 and 2) interacting with the upper ends 7 of the axles 6 of the rollers 5. The housing 1 is prefabricated, consisting of an upper housing 13 and a lower housing 14 with rollers 5. The upper 13 and lower 14 casings are interconnected with the possibility of only axial movement towards one without depressurization of the central channel 2. The pusher 12 is rigidly connected to the lower part of the upper housing 13, which is also equipped with a piston 15, and on top of the stop 16. The lower housing 14 is equipped with a hydraulic cylinder 17 on top of which the piston 15 of the upper housing 13 is mounted . Between the stop 16 a compression spring 18 is installed in the upper body 13 and the hydraulic cylinder 17. The piston cavity 19 of the hydraulic cylinder 17 is connected to the central channel 2. To prevent unauthorized operation of the device when lowering into horizontal wells 20 or wells 20 with a complex profile, the hydraulic cylinder 17 can be fixed in the transport position relative to the upper case 13 with a spring-loaded retainer 21 interacting with the central channel 2 by means of a radial hole 22. To exclude the rotation of the upper case 13 includes In relation to the lower 14, the lower outer part of the upper housing 13 below the piston is made in the form of a hexagon 23 (see 1 and 4), interacting with the internal hexagon 24 of the lower part of the hydraulic cylinder 17 (see figures 1 and 4).

Unauthorized fluid flows are eliminated by seals 25 (see figure 1), 26, 27 and 28.

The device operates as follows:

The device assembly as part of the downhole equipment (not shown in Fig.), Which is connected by threads 3 and 3 '(see Fig. 1), is lowered into the well 20 (see Figs. 1 and 2) to an expandable device 29 (for example : in the form of a profile blocker previously installed in the extension 30 of the open wellbore 20). Then create a fluid flow through the Central channel 2 and give rotation to the housing 1. By connecting the outer hexagon 23 (see figures 1 and 4) of the upper housing 13 and the internal hexagon 24 of the hydraulic cylinder 17 of the lower housing 14 (see figure 1) all design rotates synchronously. In this case, the pressure differential generated between the pressures inside the borehole 20 and inside the central channel 2 during fluid flow leads to the fact that the latch 21 (see Figs. 1 and 2) is pushed out through the opening 22, releasing the hydraulic cylinder 17 from the upper casing 13. As a result, the pressure transmitted from the central channel 2 to the over-piston cavity 19 of the hydraulic cylinder 17 lifts the hydraulic cylinder 17 relative to the piston 15, compressing the compression spring 18 located between the stop 16 and the hydraulic cylinder 17, and the pusher 12 extends the upper ends 7 of the axles 6 together with the rollers 5 and from the recesses 4, choosing the gap 8 to the minimum size, while the lower ends 9 will rotate on hinges 11 in the supports 10. Axes 6 rotate in the plane F (see figure 3), passing through the longitudinal geometric axes of the housing 1 and the rollers 5, passing to working position.

Next, the device is given translational downward movement, as a result, under the action of the rollers 5 (see FIG. 2), the expandable device 29 (see FIG. 5) from its initial state in the well 20 flares up tightly along the open hole extension 30 (see FIG. 6) wells 20. In this case, to extend the rollers 5 (see FIG. 2), not only the pressure differential in the supra-piston cavity 19 of the hydraulic cylinder 17 is used, but also the weight of the downhole equipment located above the device, excluding unauthorized folding of the rollers 5 (see FIG. 1) transport situation. As a result, flaring of the expandable device 29 is uniform over the entire length (see FIGS. 2 and 6).

After the flare is completed, the fluid circulation through the central channel 2 (see FIG. 2) is stopped, under the action of a spring 18 resting on a stop 16, the hydraulic cylinder 17 with the lower casing 14 is pressed down (automatic return), returning the device to the transport position (see FIG. .1), the pusher 12 stops pressing the upper ends 7 of the axles 6 of the rollers 5 out. In cases of jammed rollers

5, when the spring 18 is insufficient to return to the transport position, the downhole equipment is lifted together with the upper body 13 and the pusher 12 relative to the lower body 14 jammed by the rollers in the well 20 (forced return), returning the device to the transport position. In the transport position, the upper housing 13 is fixed relative to the hydraulic cylinder 17, a spring clip 21, which, when combined with the hole 22, enters it. In cases where the rollers 5 unauthorized diverge, then under the influence of external forces, which, based on the structural form of the rollers 5 always have a radial component directed inward, the rollers 5 return to the transport position, excluding jamming of the device in the well 20.

The design of the proposed device for expanding pipes in the well allows to increase the reliability and operability of the device by eliminating emergency situations when removing equipment and to improve the quality of the operations of expanding due to the uniformity of expansion along the entire length of the expandable device.

Claims (2)

1. A device for expanding pipes in a well, including a housing with a central channel, threads for connecting to 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 detachably with a radial clearance, and the lower installed in the bearings of the housing with the help of hinges with the ability to rotate them in a plane passing through the longitudinal geometric axis of the housing and the rollers, and the pusher interacting with the upper ends of the axes of the rollers, I distinguish it consists in that the housing is prefabricated, consisting of an upper housing and a lower housing with rollers, the upper and lower housings being interconnected with only axial movement towards each other without depressurization of the central channel, and the pusher is rigidly connected to the lower part of the upper housing, which is also equipped a piston, and on top - an emphasis, while the lower case on top is equipped with a hydraulic cylinder in which the piston of the upper case is installed, and a compression spring is installed between the emphasis of the upper case and the hydraulic cylinder, nadporshnevogo cavity of the hydraulic cylinder is connected with the central channel. 2. The device according to claim 1, characterized in that the hydraulic cylinder is fixed in the transport position relative to the upper case with a spring-loaded lock in contact with the central channel using a radial hole.