RU2566353C1 - Hydraulically-operated shutoff valve of cartridge type - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: tubing string assembly comprises a setting case connected by threaded connection to the pipe string. The case is made with a groove for placement of latch mechanism and a groove for delivery chamber with opening to interchange with hydraulic control line. The groove is placed between the upper and lower systems of seals. The system is made with upper and lower inner seals, which are mated to a locking body. The system is made with upper and lower outer seals, which are mated to inner surface of the case. The locking body is made stepped, its upper step is placed in the lower system of seals and its lower step may interact with a saddle. The upper step is placed between the upper and lower seals; together with the lower system of seals it forms a cavity coupled to the chamber by means of opening.

EFFECT: improved function of control of the locking body, reduced labour costs at maintenance, repair and servicing.

2 cl, 4 dwg

Description

The invention relates to the oil and gas industry, in particular to a plug-in type plug-in valve with hydraulic control, which can be installed or removed with the help of a mounting device from a tubing string for repair or maintenance.

Known shut-off valve installed under the packer, comprising a housing with a locking body located therein, a passage channel in the housing and in the locking body, communicating the space of the production casing above and below the shut-off valve in the open position, while the housing is mounted on a metal pipe in which the bypass holes and the groove are made, and the production string spaces above and below the shut-off valve are communicated through a tip installed with the possibility of entering the passage channel (RU No. 127123 U1, E21B 34/06, 04/20/2013).

Known shut-off valve comprising a housing with inlet and outlet fittings, a saddle with a shutter, a pilot mechanism in the form of interacting in the middle of a spring-loaded vertical rod connected to the shutter, and a horizontal piston made in the form of a control mechanism (RU No. 2315173 C1, E21B 34 / 02, 01.20.2008).

Known shut-off valve for a gas well, comprising a housing with a saddle, a locking member, a locking member control unit including a spring-loaded stem with an axial channel mounted in the housing with the possibility of axial movement and forming an annular cavity with the housing for supplying a control agent (RU No. 2311578 C1 , E21B 34/06, F16K 3/04, 11/27/2007).

A gas shutoff valve is known, including a shutter and a closed chamber located above it and forming a closed chamber, a movable sleeve with an annular piston, connected with the shutter with the possibility of moving it to the closed position when the piston moves in the direction of increasing the chamber volume (RU No. 2194845 C2 , E21B 34/06, 12.20.2002).

A known shut-off valve comprising a housing, a spring-loaded rod with a piston installed in the housing, an annular hydraulic chamber in communication with the fluid supply pipe, and a poppet, made with the possibility of transitioning to the open position when fluid is supplied to the hydraulic ring chamber (RU No. 2160357 C2, E21B 34/06, 10.12.2000).

Known shut-off valve comprising a housing with an axial channel and a locking element located in the housing, made in the form of a hollow differential piston with a collet located in its lower part, and equipped with a guide cylinder mounted in the housing with the formation of an annular gap (RU No. 2145024 C1, E21B 34/08, F16K 17/34, 01/27/2000).

Known valve-shutoff estuarine hydraulically controlled, containing a prefabricated housing having a hydraulic input for supplying control fluid under pressure, a locking element in the form of a poppet valve, a control unit of the locking body in the form of a spring-loaded rod mounted in a precast housing with the possibility of axial movement, the sealing unit installed in the housing, and the sealing sleeve with an elastic polymer seal (RU No. 109789 U1, E21B 34/06, 10.27.2011).

Known is a shut-off valve with a mounting device for a gas well in an emergency situation, comprising a housing with a saddle, a locking member, a control unit for a locking body in the form of a spring-loaded stem, while a groove with a nipple profile is made in the housing above the control unit for a locking body and an expansion sleeve is placed located in the zone of the locking body, and made the lock placed in the groove with a nipple profile (RU No. 93874 U1, E21B 34/06, 05/10/2010).

All known shut-off valves are individually designed.

Known hydraulically controlled valve-cutoff for gas wells, connected by a threaded connection to the string of tubing and containing a housing, a saddle, a locking member, a groove for the injection chamber with an opening connected to the hydraulic control line, a locking device in the form of a lock, equipped with a locking element, having the ability to interact with the device for installation, and a groove for placing the lock of the locking device (RU No. 94279 U1, E21B 34/06, 05/20/2010).

This technical solution was taken as the closest analogue of the invention.

In the closure valve of the closest analogue, the control of the shut-off element is performed from the wellhead by supplying the controlled fluid through a tube into the cavity with a rod that acts on the control unit of the shut-off element, while the spring is compressed. When the fluid pressure is relieved, the spring returns the control unit to the locking member to its original position and the locking member closes. When the shut-off valve is open, the reservoir pressure of the produced fluid exerts counter pressure on the rod, and there may be a moment when it moves it to its original position and closes the shut-off element. The movement of the locking element in the shut-off valve of the closest analogue depends on the movement of the stem.

In the closure valve of the closest analogue, its body is directly connected by a threaded connection to the tubing string, while removing the shutoff valve from the well is possible only when lifting the tubing string.

The basis of the invention is the solution to a problem that allows to simplify operation, increase the control functions of the locking body, improve maintenance, repair and preventive maintenance.

The technical result of the invention lies in the possibility of extracting the shut-off valve from the well (subsequent installation) without lifting the tubing string and providing a full bore section inside the tubing string for lowering the technological tools into the well and pumping the process fluids by making an installation case connected with a string of tubing, making grooves in it to accommodate the lock of the locking device and grooves for the supercharger chamber, connected by an opening to the hydraulic control line, and in creating the unity of control functions of the locking body by placing the injection chamber in the groove of the installation case, the presence of the lower and upper sealing systems and making the locking body stepwise, having the ability to interact with the lock of the locking device located in a groove for it, made in the installation case.

According to the invention, this problem is solved due to the fact that the plug-in hydraulically controlled shut-off valve is connected by a threaded connection to the tubing string and contains a housing, a saddle, a shut-off element, a groove for the injection chamber with an opening connected to the hydraulic control line, a fixing device in the form of the lock, equipped with a locking element that can interact with the device for installation, and a groove for placing the lock of the locking device.

The layout of the tubing string includes an installation housing.

The installation housing is connected by a threaded connection to the tubing string.

The mounting case is made with a groove to place the lock of the locking device.

The installation case is made with a groove for the injection chamber with a hole.

The hole is connected to the hydraulic control line.

A groove for the injection chamber is located between the upper and lower seal systems.

The upper and lower sealing systems are placed sequentially under the lock of the locking device.

The lower seal system is made with upper and lower inner seals.

The upper and lower internal seals are associated with a locking body.

The upper seal system is made with upper and lower outer seals.

Upper and lower outer seals mate with the inner surface of the installation housing.

The locking body is made stepwise.

The upper stage of the locking element is located in the lower system of the seal.

The upper stage of the locking element is located between the upper and lower inner seals.

The upper stage of the locking member together with the lower sealing system forms a cavity connected to the discharge chamber by means of an opening.

The hole is made in the lower seal system.

The lower stage of the locking element has the ability to interact with the saddle.

At the same time, in the upper stage of the locking element, the upper inner seals are placed on a smaller diameter than the diameter of the placement of the lower inner seals.

In addition, at the lower stage of the locking element, a sleeve is made in contact with the seat, on which scrapers are placed to remove mechanical impurities.

The applicant has not identified sources containing information about technical solutions identical to the invention, which allows us to conclude that it meets the criterion of "novelty."

Due to the implementation of the distinguishing features of the invention (together with the features indicated in the restrictive part of the formula), important new properties of the object are achieved.

The connection of the installation housing with the tubing string allows the shut-off valve to be removed from the well without lifting the tubing string, which simplifies operation, improves maintenance, and repairs and maintenance.

The execution in the installation case of a groove for locating the lock of the fixing device and the execution of a groove in it for the injection chamber connected by an opening to the hydraulic control line increases the functionality of the bouncing valve.

The presence in the lower system of the seal of the upper and lower internal seals associated with the locking body, and the presence in the upper system of the seal of the upper and lower external seals associated with the inner surface of the installation case, the location of the discharge chamber between them - all this allows to increase the control functions of the movement of the locking body .

The placement of the injection chamber in the groove of the installation case, the presence of the lower and upper sealing systems and the locking element being stepped when placing the upper stage in the lower sealing system together with the formation of a cavity together with the lower sealing chamber together with the lower sealing system, provide the unity of control functions for the shut-off valve.

The applicant is not aware of any publications that would contain information on the influence of the distinguishing features of the invention on the achieved technical result. In this regard, we can conclude that the proposed technical solution meets the criterion of "inventive step".

The invention is illustrated by drawings, which depict:

in FIG. 1 - plug-in type shut-off valve with tubing string, section;

in FIG. 2 - shut-off valve with a lock in the closed position, section;

in FIG. 3 - installation case, section;

in FIG. 4 - upper and lower system of seals, fragment, section.

Hydraulic shutoff valve contains:

tubing string 1,

installation case (connected to column 1) - 2,

a groove for the injection chamber (in case 2) - 3,

hole for connection to a hydraulic control line (in groove 3) - 4,

locking device in the form of a lock - 5,

groove (for lock 5) - 6,

the upper seal system - 7,

upper outer seals (seal 7) - 8,

lower outer seals (seal 7) - 9,

lower seal system - 10,

upper internal seals (seal 10) - 11,

lower internal seals (seal 10) - 12,

hole (in system 10) - 13,

locking body - 14,

the upper stage (organ 14) - 15,

cavity (connected by a hole 13 with a groove 3) - 16,

saddle - 17,

lower stage (organ 14) - 18,

the sleeve (stage 18) - 19,

scrapers (on sleeve 19) - 20.

A hydraulically controlled plug-in shut-off valve is connected by a threaded connection to the tubing string 1.

The layout of the tubing string 1 includes a mounting housing 2.

The installation housing 2 is connected by a threaded connection to the tubing string 1.

The mounting housing 2 is made with a groove 6 for placement of the lock 5 of the locking device.

The installation case 2 is made with a groove 3 for the injection chamber with a hole 4.

Hole 4 is connected to a hydraulic control line (not shown).

A groove 3 for the injection chamber is located between the upper 7 and lower 10 seal systems.

The upper 7 and lower 10 systems of seals are placed sequentially under the lock 5 of the locking device.

The lower system 10 of the seal is made with the upper 11 and lower 12 inner seals.

The upper 11 and lower 12 inner seals are associated with a locking member 14.

The upper system 7 of the seal is made with the upper 8 and lower 9 outer seals.

The upper 8 and lower 9 outer seals mate with the inner surface of the mounting housing 2.

The locking element 14 is made stepwise.

The upper stage 15 of the locking element 14 is located in the lower system 10 of the seal.

The upper stage 15 of the locking member 14 is located between the upper 11 and lower 12 inner seals.

The upper stage 15 of the locking member 14 forms, together with the lower sealing system 10, a cavity 16 connected to the discharge chamber 3 by means of an opening 13.

The hole 13 is made in the lower system 10 of the seal.

The lower stage 18 of the locking member 14 has the ability to interact with the seat 17.

Moreover, in the upper stage 15 of the locking element 14, the upper inner 11 seals are placed on a diameter smaller than the diameter of the placement of the lower inner 12 seals.

In addition, at the lower stage 18 of the locking member 14, a sleeve 19 is made that is in contact with the seat 17, on which scrapers 20 are placed to remove mechanical impurities.

The control valve shut-off is as follows.

The installation housing 2 is screwed into the tubing string 1 and lowered into the well. Together with the installation case 2, a hydraulic control line pipe (not shown) is lowered into the well, which is screwed into the hole 4. The hydraulic control pipe is clamped to the tubing string 1, passes through a fountain to a hydraulic station (not shown).

On the installation fixture (not shown) by rope equipment when using a mechanical jar (not shown), the shut-off valve with the lock of the locking device 5 is lowered into the installation case 2.

They make a mechanical strike with a few strokes down to a hard stop and raise the installation fixture, which automatically disengages, up to the mouth.

In order to open the shut-off valve, pressure is supplied from the hydraulic station to the discharge chamber of the cavity 3.

The opening of the shut-off valve, under the closed gate of which reservoir pressure, is carried out using backpressure from the mouth.

After installing the shut-off valve in the installation housing 2 and supplying a fluid cavity 3 under pressure to the pressure chamber, the shut-off member 14 will begin to move down, since its upper stage 15 is located in the upper 11 and lower 12 internal seals of the lower seal system 10. Moreover, the upper 11 internal seals placed on a diameter smaller than the lower 12 inner seals, forming the difference in the area of the diametrical sections, creating a driving force.

After installing the shut-off valve in the installation case 2, the lock of the locking device 5 will go into the groove 6, while the upper 8 and lower 9 seals of the upper system of the seal 7 will be placed on the inner surface of the installation case 2 and an injection chamber of the cavity 3 will be located between them.

When the working fluid is supplied into the cavity 3, connected by the hole 13 with the cavity 16, it will flow between the upper 11 and lower 12 internal seals, while the locking element 14 will move down due to the difference in the areas described above.

If it is necessary to lift (prevent) the shut-off valve, the hydraulic control line is disconnected. A fitting device with a mechanical jar is lowered via a cable technique through a lubricator. With a light blow of a mechanical jar, the installation fixture is automatically connected to the lock of the fixing device 5 of the shut-off valve, and by striking the mechanical jar up, it is knocked out of the installation case 2.

Raise the shutoff valve from the well without lifting the tubing string 1, do the prophylaxis and again lower it into the well.

In addition, the lifting of the shut-off valve from the tubing string 1 provides a fully bore section inside the tubing string 1, which allows the descent of technological tools into the well and pumping of process fluids.

The proposed shut-off valve used devices, parts and components that are widely used for downhole fittings, and its manufacture at LLC Scientific and Production Company Zavod Zavod and experimental tests determine, according to the applicant, its compliance with the criterion of "industrial applicability".

Using the proposed shut-off valve allows:

- simplify operation;

- increase the management functions of the locking body;

- improve maintenance, repair and preventive maintenance.

Claims (2)

1. A hydraulically controlled plug-in shut-off valve connected by a threaded connection to the tubing string and comprising a housing, a saddle, a locking member, a groove for the injection chamber with an opening connected to the hydraulic control line, a locking device in the form of a lock, equipped with a locking element, having the ability to interact with the device for installation, and a groove for placing the lock of the locking device, characterized in that the layout of the column tubing contains t mounting case connected by a threaded connection to the tubing string, made with a groove for locating the lock of the fixing device and a groove for the injection chamber with an opening connected to the hydraulic control line located between the upper and lower sealing systems placed in series under the lock of the locking device the lower system of which is made with upper and lower inner seals associated with a locking body, and the upper seal system is with upper and lower outer seals associated with the inner surface of the installation case, the shutoff member is stepped, the upper stage of which is located in the lower seal system, is located between its upper and lower inner seals and forms a cavity connected with the lower seal system to the discharge chamber by holes made in the lower system of the seal, and the lower stage of the locking element has the ability to interact with the seat, while in the upper tim upper closure member inner seal arranged on a diameter smaller than the diameter size of placing lower inner seals. 2. A hydraulically controlled plug-in shut-off valve according to claim 1, characterized in that at the lower stage of the locking element there is a sleeve in contact with the seat on which scrapers are located to remove mechanical impurities.

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