RU2391592C1 - Check valve - Google Patents

Check valve Download PDF

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Publication number
RU2391592C1
RU2391592C1 RU2008153049/06A RU2008153049A RU2391592C1 RU 2391592 C1 RU2391592 C1 RU 2391592C1 RU 2008153049/06 A RU2008153049/06 A RU 2008153049/06A RU 2008153049 A RU2008153049 A RU 2008153049A RU 2391592 C1 RU2391592 C1 RU 2391592C1
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RU
Russia
Prior art keywords
holes
valve
hole
check valve
locking
Prior art date
Application number
RU2008153049/06A
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Russian (ru)
Inventor
Владимир Александрович Чигряй (RU)
Владимир Александрович Чигряй
Original Assignee
Владимир Александрович Чигряй
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Publication date
Application filed by Владимир Александрович Чигряй filed Critical Владимир Александрович Чигряй
Priority to RU2008153049/06A priority Critical patent/RU2391592C1/en
Application granted granted Critical
Publication of RU2391592C1 publication Critical patent/RU2391592C1/en

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Abstract

FIELD: machine building.
SUBSTANCE: proposed check valve comprises body with top and bottom coupling threads to allow the valve to be connected to tuning string. Movable element has through holes. Coupling serves to adjust spring contraction. Protective seal is pressed by plug. Said moving element represents a stepwise barrel that can move axially in the guides and be aligned in through holes of coupling and plug, and is furnished with axial through stepwise orifice. At the joints of different diametres a chamfer is made to make a seat for shut-off element. The latter represents a ball moving inside larger diametre hole.
EFFECT: reduced costs of additional washing and repair.
3 dwg, 6 cl

Description

The invention relates to the oil industry, in particular to downhole production equipment, and can be used in oil production, flushing and well development.

During the operation of pipeline systems, including those related to the oil industry, a technological pressure drop may occur in a certain area, an emergency stop of the pump, while the flow of the medium will reverse. In order to exclude this possibility, non-return valves are used, which allow the medium to pass through in only one direction.

Well-known installations of borehole electric centrifugal pumps, in which a check valve is installed at the outlet, the purpose of which is to keep a column of liquid in the tubing string when the pump is stopped and, thus, ensure minimum power consumption at the time of engine start (Bogdanov A.A. Submersible centrifugal electric pumps for oil production. - M: Nedra, 1968, p. 52-54).

Known check valve for a borehole electric centrifugal pump, comprising a head module with a seat and a locking element, made in the form of a tube made of plastic material with slotted grooves, while the outer diameter of the slotted grooves of the upper end of the tube is larger than the inner diameter of the tubing screwed into the module head and the inner diameter of the grooves is less than the inner diameter of this pipe, the inner diameter of the spline grooves of the lower end of the tube is larger than the diameter of the hole of the landing seat of the module head, and the lower end of ki is configured as a cone, truncated cone, a sphere or ellipsoid, with the tube height is less than the distance from the valve seat opening to the pipe tubing tubes [RF patent №2187709 IPC F04D 15/02, publ. 2002.08.20].

Known ball check valve for borehole centrifugal pumps, comprising a housing with an upper internal and lower external thread for connection to tubing and to the pump head. A cylindrical channel is formed in the valve body with an axial displacement limiter of the shut-off element integrally formed with the body and containing openings for the passage of fluid in the pressure pipe. The ball locking element is locked in the valve seat rigidly fixed in the housing by means of a nut and a threaded sleeve (Utility Model Patent No. 56940, IPC E21B 34/06, Bull. No. 27, 09/27/06.)

A well-known centrifugal pump valve comprising a housing with an internal and external connecting thread and a saddle fixed in it and a ball locking element located in the channel of the axial displacement limiter, according to a useful model, the valve seat is provided with a seating groove under the sealing ring and is fixed relative to the housing by a cylindrical sleeve and washer with holes for the passage of formation fluid, and in the upper part of the valve body there is a pipe with a sludge tube screwed into it of Tell provided with radial openings for the passage of formation fluid. A washer with holes for the passage of formation fluid is fixed from axial movement relative to the valve body by means of a spring ring, and the nozzle is mounted in the body by means of a key with a spring ring (Utility Model Patent No. 72268, IPC E21B 34/06, published on 2008.04.10] In the process operation of these valves in the pump unit, the upper pump section is clogged with mechanical impurities, which increases the number of repairs and the cost of flushing the equipment. l flushing well equipment through the device in cases of deposits of paraffin, salts and other contaminants.

The objective of the present invention is to reduce operating costs and the creation of an effective and reliable system for blocking fluid in the well without jamming for the operational management of field development and the effective implementation of repairs in the well.

This problem is solved due to the fact that in the non-return valve, comprising a body with upper and lower internal connecting threads, used to embed the valve into the tubing string, a movable element with through holes, a sleeve for adjusting the spring preload, a protective seal, pressed by a plug , a locking element in the form of a ball, a movable element is made in the form of a stepped glass, which allows axial movement in the guiding and centering through holes of the coupling and plug, in which An axial stepped through hole is made in the rum, a chamfer is made at the junction of different diameters of the hole, which is a saddle for the locking element, while the locking element in the form of a ball has the ability to move inside a larger diameter hole. Additionally, an annular groove is made on the outer surface of the smaller diameter of the stepped glass, in which an elastomeric ring gasket is installed.

Additionally, in the stepped glass above the elastomeric ring gasket there are radial through holes.

Additionally, through the larger diameter section in the stepped glass, through longitudinal holes are made.

Additionally, a cover with a through hole is installed on the upper end of the stepped glass, the chamfer of which is a saddle for the locking element.

Additionally, hard alloys are applied to the chamfers.

The invention is illustrated by drawings.

Figure 1 - General view of the valve in the operating position.

Figure 2 - General view of the valve when the pump is stopped.

Figure 3 - General view of the valve in the flushing position.

The valve comprises a hollow cylindrical body 1 with upper and lower internal connecting threads, which are used to integrate the valve into the tubing string. On the inner surface of the housing there is a protrusion with a thread for mounting the clutch 2, designed to regulate the compression force of the spring 3. The inner through hole of the clutch 2 is a guide and centering for the movable element in the form of a stepped glass 4, allowing movement in the axial direction. On the outer surface of the stepped cup 4 having a smaller diameter, an annular groove is made in which an elastomeric annular gasket 5 is installed. Radial through holes 6 are located above the elastomeric gasket. This surface is bounded by an annular bead 7, one side of which serves as a stop for the spring 3. In the area of larger diameter, through longitudinal holes are made 8. In the housing 1, the housing 9 of the protective seal 10 is fixedly fixed, pressed by the plug 11, the internal through hole of which is guide and centering for a stepped cup 4, in which an axial stepped through hole is made for the passage of fluid pumped by the pump, a chamfer is made at the interface of different diameters, on which a hard alloy is applied, which is a saddle 12 for a locking element, made, for example, in the form of a ball 13, having the ability to move inside the hole of larger diameter. At the upper end of the stepped glass 4 there is a lid 14 with a through hole, the bevel of which is a saddle 15 with a hard alloy. The check valve operates as follows.

When you turn on the pump under the action of the upward flow of the produced fluid, the shut-off element in the form of a ball 13 sits on the saddle 15. In this case, the fluid flow rushes into the through longitudinal holes 8 and then enters the pipe (not indicated in the drawing).

When the pump stops (not shown in the drawing), a pressure differential occurs between the zones located before and after the valve, under the action of a column of formation fluid, the ball 13 lowers onto the seat 12, blocking the return passage of the fluid, while the space of the step hole forms two cavities A and B. The liquid column is held in the tubing string, preventing the reverse rotation of the pump working elements. In this case, the initial compression load of the spring 3 is set equal to or greater than the axial load and the stepped cup 4 does not change its position.

During the operation of the well, salts, hydrates, paraffins and other undesirable solid formations are deposited on structures inside the well. These deposits can seriously impair pump performance. To dissolve such deposits, chemical reagents can be supplied, which are selected depending on the chemical composition of the well medium and, accordingly, on the chemical composition of solid deposits and are supplied under pressure to the pipe.

In this case, the pressure of the supplied fluid presses on the ball 13, which is located in the seat 12, and the stepped cup 4 falls down, sliding in the inner through hole of the sleeve 2, and the inner through hole of the plug 11, the spring 3 is compressed. In this case, the elastomeric ring gasket 5, installed in the contact zone of the coupling 2 and the stepped cup 4, is designed for reliable valve operation, since it eliminates the formation of scaling and scale in the mating parts.

Flushing fluid through the through longitudinal holes 8 and cavity A enters the interior of the housing 1 located between the coupling 1 and the housing 9 of the protective seal 10, then through the hole 6 and the cavity B is supplied to the pump, providing high-quality direct flushing.

After stopping the supply of flushing fluid, the pressure in the pipe drops, the spring 3 straightens, returning the stepped cup 4 to its original position, then the pump is turned on, the ball 13 rises into the seat 15, while the fluid flow through the cavities A and B rushes into the through longitudinal holes 8 and enters further into the pipe.

The proposed technical solutions provide more efficient operation of a well sucker-rod pumping unit when lifting highly viscous oil, reduce the cost of additional flushing and repair of equipment.

Claims (6)

1. The non-return valve, comprising a housing with upper and lower internal connecting threads used to integrate the valve into the tubing string, a movable element with through holes, a sleeve for adjusting the spring preload, a protective seal, preloaded by a plug, a ball-shaped locking element, characterized in that the movable element is made in the form of a stepped glass that allows axial movement in the guides and centering through holes of the coupling and plug, in which e step through hole, at the interface of different diameters of the hole a chamfer is made, which is a saddle for the locking element, while the locking element in the form of a ball has the ability to move inside a larger diameter hole.
2. The check valve according to claim 1, characterized in that on the outer surface of the stepped glass of smaller diameter an annular groove is made in which an elastomeric annular gasket is installed.
3. The check valve according to claim 2, characterized in that in the stepped glass above the elastomeric ring gasket there are radial through holes.
4. The non-return valve according to claim 2, characterized in that through the longitudinal glass holes are made in the stepped glass at a larger diameter section.
5. The check valve according to claim 1, characterized in that on the upper end of the stepped glass there is a lid with a through hole, the chamfer of which is a seat for the locking element.
6. The check valve according to claim 5, characterized in that the hard alloy is applied to the chamfers.
RU2008153049/06A 2008-12-30 2008-12-30 Check valve RU2391592C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2008153049/06A RU2391592C1 (en) 2008-12-30 2008-12-30 Check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2008153049/06A RU2391592C1 (en) 2008-12-30 2008-12-30 Check valve

Publications (1)

Publication Number Publication Date
RU2391592C1 true RU2391592C1 (en) 2010-06-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2449192C1 (en) * 2010-11-29 2012-04-27 Общество с ограниченной ответственностью "Русская электротехническая компания" ("РУСЭЛКОМ") Reversible check valve
RU2455546C1 (en) * 2010-12-30 2012-07-10 Общество с ограниченной ответственностью "Конкистадор" Check valve
WO2014065712A1 (en) * 2012-10-25 2014-05-01 Закрытое Акционерное Общество "Новомет-Пермь" (Зао "Новомет-Пермь") Valve for releasing gas from a submerisble pump
CN105201454A (en) * 2015-09-01 2015-12-30 中国石油天然气股份有限公司 Blowout-preventive multifunctional tail pipe for water injection well
RU2637620C2 (en) * 2013-03-16 2017-12-05 Поли Медикьюэ Лимитед Valve for transfer unit
RU176713U1 (en) * 2017-08-25 2018-01-25 Акционерное общество "Самаранефтегаз" Check valve
RU186883U1 (en) * 2018-12-17 2019-02-07 Общество с ограниченной ответственностью "Комплекс" Check valve for repair of injection wells
RU199503U1 (en) * 2019-12-08 2020-09-04 Игорь Владимирович Бердышев Valve for anti-icing and snow melting system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2449192C1 (en) * 2010-11-29 2012-04-27 Общество с ограниченной ответственностью "Русская электротехническая компания" ("РУСЭЛКОМ") Reversible check valve
RU2455546C1 (en) * 2010-12-30 2012-07-10 Общество с ограниченной ответственностью "Конкистадор" Check valve
WO2014065712A1 (en) * 2012-10-25 2014-05-01 Закрытое Акционерное Общество "Новомет-Пермь" (Зао "Новомет-Пермь") Valve for releasing gas from a submerisble pump
RU2637620C2 (en) * 2013-03-16 2017-12-05 Поли Медикьюэ Лимитед Valve for transfer unit
CN105201454A (en) * 2015-09-01 2015-12-30 中国石油天然气股份有限公司 Blowout-preventive multifunctional tail pipe for water injection well
CN105201454B (en) * 2015-09-01 2017-12-08 中国石油天然气股份有限公司 The multi-functional tail pipe of water injection well jet proof type
RU176713U1 (en) * 2017-08-25 2018-01-25 Акционерное общество "Самаранефтегаз" Check valve
RU186883U1 (en) * 2018-12-17 2019-02-07 Общество с ограниченной ответственностью "Комплекс" Check valve for repair of injection wells
RU199503U1 (en) * 2019-12-08 2020-09-04 Игорь Владимирович Бердышев Valve for anti-icing and snow melting system

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