RU96908U1 - DEVICE FOR WASHING THE BOTTOM AND OIL AND GAS WELLS - Google Patents

Abstract

 A device for washing the bottom and barrel of an oil and gas producing well, including a tank, a pump mounted on a self-propelled means, component equipment and wellhead reinforcing piping of the well, characterized in that the component equipment is made in the form of a tee with connecting threads and is equipped with a high pressure valve, a high pressure sleeve with quick-detachable connections at the ends, a flange with a nozzle, and a thread is made to install a sealing plug on the inner surface of the nozzle.

Description

The utility model relates to the oil industry, namely, devices for flushing oil wells during underground or overhaul wells.

When eliminating asphalt-resinous and paraffin deposits in wells, cleaning the bottom of the well, direct or reverse flushing is used.

For washing, the wellhead fittings are partially disassembled: SUSG, flow and gas outlet line of wellhead valves, manifold line from wellhead valves.

Depending on the operations carried out, the liquid from the well after flushing enters the trough or through the manifold line to the pressure oil pipe of the well.

A device for washing tubing of oil and gas producing wells is known, including a tank, a pump mounted on a self-propelled vehicle with component equipment and technical equipment, wellhead reinforcing piping of the well, the component part of the equipment includes a lubricator with a built-in plug valve, stuffing box packing with the possibility of vertical movement and fixation in extreme positions. The upper tip of the rod has a locking member and a connection node with the pump supply pipe, while in the extreme upper position of the hollow rod its lower tip is located above the cork valve in the lubricator, and in the lowermost position the lower tip is located below the central valve (see RF patent No. 2179627, ЕВВ 37/06, published on February 20, 2002).

A disadvantage of the known device is the inability to perform direct and reverse flushing of the well with the same equipment.

In addition, during intermediate operations, the pressure oil pipeline remains depressurized, which is a violation of industrial safety rules.

The objective of the proposed device is to improve the design, which allows for direct and reverse flushing of the well without additional costs, and seals the flow line of the well for the duration of the intermediate work.

The problem is solved in that in the device for washing the bottom and the trunk of an oil and gas producing well, including a tank, a pump that are mounted on a self-propelled means, components and wellhead reinforcing piping, the components are made in the form of a tee with connecting threads and equipped with a high pressure valve, sleeve high pressure with quick-detachable connections at the ends, a flange with a nozzle, while for the installation of the sealing plug on the inner surface of the nozzle ba.

A distinctive feature of the proposed utility model is the presence of a tee in the device, which is equipped with a high-pressure valve, a high-pressure sleeve having quick-detachable connections at the ends, a flange with a pipe for connection to the high-pressure sleeve. In addition, a thread is made on the inner surface of the nozzle to install a sealing plug.

This allows direct and reverse flushing of the well and sealing the flow line of the well during intermediate operations.

Figure 1 shows the proposed device.

The device for washing the bottom and the well of an oil and gas well contains a tee 1 with connecting threads, a high pressure valve 2, a connecting pipe 3, a high pressure sleeve 4, union nuts 5, a pipe 6, a flange 7. A pipe 6 with an external thread is welded to the flange 7 .

On the inner surface of the pipe 6, a thread is made for installing a sealing plug (not shown).

The device operates as follows.

The tee 1 is installed using a threaded connection in the coupling on the faceplate, that is, it is connected to the tubing string.

With direct flushing of the well, the injection line from the flushing fluid supply pump is connected to the outlet of the tee.

One end of the high pressure sleeve is connected using a union nut 5 with a nozzle mounted on the annular valve 8. And the second end of the high pressure sleeve is connected using a union nut 5 to the nozzle 6. The flange 7 is attached to the flange of the non-return valve or valve using studs or bolts pressure pipe 10.

In borehole conditions, the circulation of flushing fluid through the tubing string and the annulus of the borehole and the transfer of asphalt-resinous and paraffin deposits to the pressure line of the pipeline.

During the backwash of the well, the injection line from the pump for supplying the washing liquid is connected to the annular valve 9. And the end of the high pressure sleeve is connected using a union nut 5 to the pipe 3, which is installed in the high pressure valve located on the lateral branch of the tee 1.

Flushing fluid circulates through the annulus of the well - the tubing string and the removal of asphalt-resinous and paraffin deposits into the pressure line of the oil pipeline.

When conducting intermediate work at the wellhead, the high-pressure sleeve is disconnected from the pipe 6 and a plug-sealant is installed.

The application of the proposed device allows for direct and reverse flushing of the well with minimal cost of working time, also allows you to seal the interior of the pressure pipeline.

Claims (1)

A device for washing the bottom and barrel of an oil and gas producing well, including a tank, a pump mounted on a self-propelled means, component equipment and wellhead reinforcing piping of the well, characterized in that the component equipment is made in the form of a tee with connecting threads and is equipped with a high pressure valve, a high pressure sleeve with quick-detachable connections at the ends, a flange with a nozzle, and a thread is made to install a sealing plug on the inner surface of the nozzle.