RU38821U1 - DEVICE FOR REPLACEMENT OF STEM AND SIDE LATCHES OF FOUNTAIN FITTINGS UNDER PRESSURE - Google Patents

Abstract

A device for replacing the stem and side gates of a fountain valve under pressure, including a housing with a flange for connecting to the housing of the replaced valve, a surge chamber with a locking element, a rod located in the housing, an overlapping element mounted on the end of the stem, characterized in that it is additionally equipped with a hose high pressure and a buffer flange, which is located after the lateral working valve and is equipped with a locking element, while the high pressure hose is connected to the locking elements equalizing to measures flange and a buffer, and as the locking elements using the high-pressure taps.

Description

A device for replacing the stem and side gates of a fountain valve under pressure relates to the oil and gas industry, namely, devices for replacing a valve in a gas well when repairing wellhead equipment, in particular when repairing a fountain valve.

When repairing wellhead equipment, it is often necessary to replace the stem or side gates of fountain valves. The replacement of valves is usually done after killing the well, which is associated with additional costs for killing the well and subsequent development. The best option is to replace the gate valves under pressure without killing the well.

A device is known that is used to replace valves of fountain valves under pressure, including a housing with a flange for connecting to a housing of a replaceable valve, a rod located in the housing, an overlapping element located at the end of the stem [Utility Model Patent No. 18730 of the Russian Federation].

The disadvantage of this device is that when replacing the valves of the fountain valves, the overlapping device is not unloaded, which leads to the high complexity of the work in the process of replacing the valves of the fountain valves.

A device is known that is used to replace valves of fountain valves under pressure, including a housing with a flange for connecting to the housing of a replaceable valve, a surge chamber with a locking element, a rod located in the housing, an overlapping element located at the end of the rod [AS No. 446712 USSR].

The disadvantage of this device is the relatively high complexity of the work to equalize the pressure before and after the blocking element when replacing the valves of the fountain valves, due to the need to use additional equipment during the work.

The challenge facing when creating the device is to ensure reliability and speed of replacement of valves of fountain valves.

Achievable technical result consists in reducing the complexity of unloading the overlapping element in the process of replacing valves of fountain valves.

The task and the technical result are achieved by the fact that in the known device for replacing the stem and side valves of the fountain valves under pressure, comprising a housing with a flange for connecting to the housing of the replaced valve, a surge chamber with a locking element, a rod located in the housing, an overlapping element mounted on the end of the rod, in contrast to the prototype, it is additionally equipped with a high pressure hose and a buffer flange, which is located after the lateral working valve and is equipped with a locking element, with this high-pressure hose is connected to the locking elements of the surge chamber and the buffer flange, and high pressure valves are used as locking elements.

In Fig.1 shows the inventive device when replacing the stem gate valve of the fountain, in Fig.2 - the same when replacing the lateral gate valve of the fountain.

The device consists of a housing 1 with a flange 2 and a movable rod 3 coaxially mounted in it. On the side of the flange 2 in the housing 1, a surge chamber 4 is made with a sealing element 5 at the point of entry of the rod 3 and a locking element 6. As a locking element 6 of safety conditions it is necessary to use a high pressure tap. An overlapping element 7 is installed at the end of the stem. As

blocking element 7, you can use a piston lock, blind plug, check valve or any other blocking element. The housing of the replaceable stem valve 8 with the gate 9 located therein is connected by flanges 10 to the body 1 and the pipe head 11 of the fountain valve, on the lateral outlets of which the lateral valves 12 and 13 are located. A buffer flange 14 with a locking element 15 is attached to the lateral working valve 12. the elements 6 and 15 are interconnected during the replacement of the stem valve 8 are connected by a high pressure hose 16.

The device operates as follows.

When the gate 9 of the replaceable stem valve 8 is closed, the device with the overlapping element 7 completely inserted inside the equalization chamber 4 by its flange 2 is fastened, for example, bolts or studs with nuts, and the steel ring is attached to the flange 10 of the replaceable stem valve 8. To the side working flange the valve 12 by means of fasteners and a steel ring is attached to the buffer flange 14 with a locking element 15, which is used as a high-pressure valve. A high-pressure hose 16 is connected to the shut-off elements 6 and 15 located on the housing 1 and on the buffer flange 14. Gas through the high-pressure hose 1 ^ connected to the shut-off elements is transferred from the internal cavity 17 of the pipe head 11 to the equalization chamber 4. After pressure equalization before and after the blocking element 7, close the locking element 6 and open the gate 9 of the replaceable stem valve 8. By turning the steering wheels 18, the blocking element 7 is inserted inside the pipe head 11 and fix it in the pipe head 11. Fixing the The covering element 7, depending on its design, is produced either by wrapping the tubing head 11 in the threaded connection of the tubing 19 suspension, or by anchoring it in the inner surfaces of the tubing 20 or in another way. Then close the locking element 15, disconnect the high pressure hose 16 from the locking element 6 with the simultaneous release of gas from the internal cavity

high pressure hose 16. After that, the locking element 6 is opened and the pressure in the equalization chamber 4 is reduced to atmospheric pressure.

After fixing the blocking element 7 in the pipe head 11, the device is removed from the flange 10 of the replaced stem valve 8, and then the replaced stem valve 8. In place of the replaced stem valve 8, a new stem valve is mounted, to the flange 10 of which the device is mounted. A high-pressure hose 16 is connected to the shut-off element 6, the shut-off elements 15 and 6 are opened in series, the gas is passed from the internal cavity 17 of the pipe head 11 to the equalization chamber 4. After equalizing the pressure before and after the blocking element 7, by turning the steering wheels 18, the blocking element 7 in the pipe the head 11, move it into the equalization chamber 4 and close the gate 9 of the replaced, new, stem valve 8. After reducing the pressure in the equalization chamber 4 using a flexible high-pressure hose 16 as described above dix technology disassembled device with flange 10 new, replaced, valve stem 8.

The replacement of the lateral valve 21 is carried out according to the above method. In this case, the device is mounted on the flange 22 of the replaceable lateral valve 21, the subsequent work on its replacement is carried out according to the above technology.

Claims (1)

A device for replacing the stem and side gates of a fountain valve under pressure, including a housing with a flange for connecting to the housing of the replaced valve, a surge chamber with a locking element, a rod located in the housing, an overlapping element mounted on the end of the stem, characterized in that it is additionally equipped with a hose high pressure and a buffer flange, which is located after the lateral working valve and is equipped with a locking element, while the high pressure hose is connected to the locking elements equalizing to measures flange and a buffer, and as the locking elements using the high-pressure taps.