RU173861U1 - DEVELOPMENT PROTECTION OF UNDERGROUND EQUIPMENT OF WELLS FROM MECHANICAL IMPURITIES - Google Patents

Abstract

The utility model relates to the mining industry and is intended for the oil and gas industry in the operation of oil and gas producing wells containing solid particles, sludge, sand, dirt, and in particular to devices for retaining mechanical impurities. Allows you to increase the life of the equipment due to a significant reduction in abrasive wear. The capture and deposition of mechanical impurities in the drive occurs under the action of centrifugal force, without the use of rotating parts and without mechanical connection with the drive of an electric centrifugal pump. The inventive device for protecting underground equipment of wells from mechanical impurities contains a housing with inlet openings and a drive in the lower part, connected by an adapter, the device is used with electric centrifugal pumps in the casing and is not mechanically connected to the drive of the electric centrifugal pump, and the inlets are located in bottom of the case. Through them, the fluid flow enters the fluid chamber, where, passing through the impeller blades mounted motionless, it receives rotation. Under the action of centrifugal force, solid particles are discarded to the walls of the chamber, which contain holes. Solid particles, having got through these openings and openings in the perforated casing into the annulus, due to the absence of fluid movement along the walls of the casing, are deposited in the accumulator. The proposed utility model provides increased reliability and efficiency of protection of underground equipment from mechanical impurities, increased well operation efficiency, increased well overhaul period, reduced operating costs and the duration of underground repairs.

Description

The utility model relates to the mining industry and is intended for the oil and gas industry in the operation of oil and gas producing wells containing solid particles, sludge, sand, dirt, and in particular to devices for retaining mechanical impurities. Allows you to increase the life of the equipment due to a significant reduction in abrasive wear.

A device is known for protecting the overpacker space from accumulation of solids, analogue (1), RF patent No. 2163312, date of filing of the application 06/22/2000, date of publication of the patent February 20, 2001. The device for protecting the overpacker space against the accumulation of mechanical impurities includes a well installed with a top and lower productive formations, a lifting column with a circulation valve in the lower formation zone and a packer. An underground casing is installed in the well, and on the end of the latter there is a lid placed on the lifting casing, which closes the over-packer space, an additional circulation valve is installed above the lid, a circulation valve is installed above the roof of the lower layer, and the lid on the lower side is made with radial ribs with the formation of the last the end face of the underground siege column of channels communicating annular spaces above and below the cover, while particles settling from the upper layer are delayed by erhney surface of the cover and again settling particles entrained gas lower perforation holes. The result is a warning of the accumulation of a powerful sand cork. The disadvantages of the device are unreliable design and low efficiency of protection against mechanical impurities.

A device for preventing clogging of the mechanisms of electric centrifugal pumps in wells is known, analogue (2), patent RU 2262006 C2, filing date September 16, 2003, published October 10, 2005. A device for preventing clogging and jamming of the mechanisms of electric centrifugal pumps in wells is installed above the pump , has a sump for the accumulation of solids and a labyrinth for separating particles, installed in the upper part of the device. To control the flow direction, a cylinder with a movable rod is installed inside the device. An upper valve is installed on the stem, which opens when the pump stops the hole in the upper part of the cylinder for liquid drain through the maze, and a lower valve that holds the stem in the upper position and opens the passage when the pump is running. Holes are made in the lower part of the sump. The cylinder inside the device is mounted movably, loaded down by a return spring and equipped with a conical ring seal to close the hole in the lower part of the sump with the pump turned off. The lower valve is float-operated for lifting through the upper valve of the movable cylinder and is equipped with a compression spring. At the entrance to the maze, a ring magnet is installed on the device’s body. The invention is aimed at preventing clogging and jamming of the actuators of the pumps when they are turned off. The disadvantages of the device are unreliable design and low efficiency of protection against mechanical impurities.

Known submersible separator of mechanical impurities, prototype (3), RF patent No. 2526068, application filing date 03/27/2013, published 08/20/2014, Submersible separator of mechanical impurities includes a housing with inlet and outlet openings, a rotating screw, a protective sleeve and a separation head with channels of removal of mechanical impurities. The inlet openings are located above the rotating screw, and channels for purified liquid are made in the separation head, connected with the outlet openings through an annular gap formed between the protective sleeve and the housing. On the inner side of the thermowell, a helical grill can be made with the cutting progress in the direction of rotation of the screw. An impeller can be installed in front of the outlets to increase the pressure. The disadvantages of this proposal are the design complexity, the need for a drive from an electric centrifugal pump, mechanical wear of rotating parts. The technical problem solved by the utility model is to increase the reliability and effectiveness of the protection of underground equipment from mechanical impurities.

The purpose of the proposed utility model is achieved by the fact that in the device for protecting underground equipment of wells from mechanical impurities, not mechanically connected with the drive of the electric centrifugal pump, the fluid flow enters through the inlet openings in the fluid chamber, where, passing through the impeller blades mounted motionless, it receives rotation. Under the action of centrifugal force, solid particles are discarded to the walls of the chamber, which contain holes. Solid particles, having got through these openings and openings in the perforated casing into the annulus, due to the absence of fluid movement along the walls of the casing, are deposited in the accumulator.

The technical result achieved by the proposed utility model is solved by a device for protecting underground equipment of wells from mechanical impurities, which contains a housing with inlets and a drive in the lower part connected by an adapter, the device being used with electric centrifugal pumps in a sealed enclosure and is not mechanically connected to driven by an electric centrifugal pump, and the inlets are located at the bottom of the housing. Through them, the fluid flow enters the fluid chamber, where, passing through the impeller blades mounted motionless, it receives rotation. Under the action of centrifugal force, solid particles are discarded to the walls of the chamber, which contain holes. Solid particles, having got through these openings and openings in the perforated casing into the annulus, due to the absence of fluid movement along the walls of the casing, are deposited in the accumulator.

The proposed utility model provides increased reliability and efficiency of protection of underground equipment from mechanical impurities, increased well operation efficiency, increased well overhaul period, reduced operating costs and the duration of underground repairs. New is that the capture and deposition of mechanical impurities in the drive occurs under the action of centrifugal force, without the use of rotating parts and without mechanical connection with the drive of an electric centrifugal pump. The device for protecting underground well equipment from mechanical impurities can significantly increase the service life of equipment due to the multiple reduction of abrasive wear.

In FIG. 1 shows a longitudinal section through the construction of a device for protecting underground well equipment from mechanical impurities. In FIG. 2 shows a connection diagram of a device for protecting underground equipment of wells from mechanical impurities to the housing of a sealed casing of an electric centrifugal pump.

The device for protecting underground equipment of wells from mechanical impurities (Fig. 1) contains a housing 1 with a drive 10 in the lower part with a plug 14 connected using an adapter 9, inlets 7, an adapter 11 in the upper part, for connecting tubing 17 ( Fig. 2) in the case of attaching to a sucker rod pump (not shown in the drawing) or to the housing of the sealed casing of the electric centrifugal pump 20 (Fig. 2). Inside the housing 1 (Fig. 1) there is a liquid chamber 15 containing a manifold 6 with a bottom 8, rings 3 with holes 16, rings 4 with impellers 5 fixed therein, located in a perforated casing 2 and fixed with a nut 12. Liquid chamber 15 connected to the housing 1 in the upper part by means of a sleeve 13, and in the lower shells of the inlets 7.

The operation of the system is as follows.

The flow of fluid through the inlet 7 enters the fluid chamber 15, where, passing through the blades of the impellers 5 mounted motionless, it receives rotation.

Under the action of centrifugal force, solid particles are discarded to the walls of the liquid chamber 15, which contain openings 16. Solid particles, which fall through the openings 16 and openings in the perforated casing 2, into the annulus, due to the absence of fluid movement along the walls of the housing 1, settle into the reservoir 10, and the purified liquid through the sub 11 (Fig. 2) enters the tubing 17 in case of attaching to a sucker rod pump (not shown in the drawing) or directly into the casing 18 of the electric centrifugal pump Sosa 20, further through an input unit 19 for receiving electrical centrifugal pump 20. The accumulator volume is increased on request by screwing the tubing between the accumulator 10 and the plug 14.

Technological and technical results when using a device to protect underground equipment of wells from mechanical impurities is achieved due to the fact that the capture and deposition of mechanical impurities in the drive occurs under the action of centrifugal force, without the use of rotating parts and without mechanical connection with the drive of an electric centrifugal pump.

The economic effect of the use of the invention can be achieved by increasing the reliability and efficiency of protecting underground equipment from mechanical impurities, increasing the efficiency of the well, increasing the overhaul period of the wells, reducing operating costs and the duration of underground repairs.

References

1. RF patent №2163312, the filing date of the application 06/22/2000, the date of publication of the patent 02/20/2001

2. Patent RU 2262006 C2, filing date September 16, 2003, published October 10, 2005

3. RF patent No. 2526068, application filing date 03/27/2013, published on 08/20/2014.

Claims (1)

A device for protecting underground equipment of wells from mechanical impurities, comprising a housing with inlet openings and a drive in the lower part connected by an adapter, characterized in that the device is used with electric centrifugal pumps in a sealed enclosure and is not mechanically connected to the drive of the electric centrifugal pump, and the inlets are located in the lower part of the housing, through them the fluid flow enters the fluid chamber, where, passing through the impeller blades mounted motionless, it receives a rotation set, further under the influence of centrifugal force discards solid particles to the chamber walls of which contain openings, solid particles hitting through these holes and the holes in the perforated casing into the annulus due to a lack of movement of fluid along the walls of the housing, ends up in the storage device.

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