RU2463442C1 - Restricting shutoff valve of device for mounting liner string in well - Google Patents

Restricting shutoff valve of device for mounting liner string in well Download PDF

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Publication number
RU2463442C1
RU2463442C1 RU2011115647/03A RU2011115647A RU2463442C1 RU 2463442 C1 RU2463442 C1 RU 2463442C1 RU 2011115647/03 A RU2011115647/03 A RU 2011115647/03A RU 2011115647 A RU2011115647 A RU 2011115647A RU 2463442 C1 RU2463442 C1 RU 2463442C1
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RU
Russia
Prior art keywords
piston
sleeve
spring
contact
throttle
Prior art date
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RU2011115647/03A
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Russian (ru)
Inventor
Алексей Михайлович Володин (RU)
Алексей Михайлович Володин
Владислав Алексеевич Сорокин (RU)
Владислав Алексеевич Сорокин
Андрей Александрович Клинов (RU)
Андрей Александрович Клинов
Сергей Борисович Лободюк (RU)
Сергей Борисович Лободюк
Александр Викторович Деев (RU)
Александр Викторович Деев
Алексей Николаевич Васин (RU)
Алексей Николаевич Васин
Николай Павлович Петров (RU)
Николай Павлович Петров
Олег Николаевич Андрианов (RU)
Олег Николаевич Андрианов
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Открытое Акционерное Общество "Тяжпрессмаш"
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Application filed by Открытое Акционерное Общество "Тяжпрессмаш" filed Critical Открытое Акционерное Общество "Тяжпрессмаш"
Priority to RU2011115647/03A priority Critical patent/RU2463442C1/en
Application granted granted Critical
Publication of RU2463442C1 publication Critical patent/RU2463442C1/en

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Abstract

FIELD: oil-and-gas production.
SUBSTANCE: proposed valve comprises piston, spring, nut coupled with sleeve by thread joint, and spring stop. Composite sleeve consists of main bearing part and part to stay in contact with piston of operation of shutoff throttle valve. Sleeve contact part is made from stainless steel. To seal clearance between sleeve parts, rubber or polymer seal ring is fitted there between. Piston is made from stainless steel and has tapered ledge. Angle between generator of whatever taper surfaces in contact and axis of piston symmetry varies from 25 to 35 degrees. Piston length-to-maximum diameter ratio varies from 2.5 to 3.5. Piston is coupled with sleeve bearing part by nut with round holes bored therein for pumping working fluid there through. Aforesaid springs top consists of washer interacting with spring and screw screwed in piston to press washer to spring. Spring coil cross-section may be shaped to rectangle. Note here that rectangle larger side is parallel with axis of piston symmetry.
EFFECT: higher reliability, manufacturability, reduced material intensity.
2 cl, 5 dwg

Description

The invention relates to the field of equipment for oil and gas production and can be used when attaching oil or gas wells, namely when installing casing shanks in oil or gas wells.

Known throttle check valve device for mounting a well with a casing shank, including a piston, spring-loaded with a spring, a sleeve connected to the piston by a nut having holes for pumping the working fluid, as well as a spring stop assembly in the lower part of the piston [1].

The disadvantage of this device is, first of all, the low reliability of its operation, since the parts in contact, the piston and the sleeve, which ensure the closing of the butterfly valve, are made of steel susceptible to corrosion, i.e. rust.

In addition, the throttle shutoff valve has a large material consumption, since the dimensions of its parts are not optimized in any way.

Also, the manufacturing technology of the butterfly valve is complex, since the spring stop assembly in the lower part of the piston contains at least one nut, which must be manufactured specifically for this assembly.

Closest to the claimed is a throttle shutoff valve of a device for installing and sealing a casing liner in a well, including a piston spring-loaded, a sleeve interacting with the piston with at least one nut connected to the sleeve by a threaded connection, and a spring, and also including spring stop assembly [2].

The disadvantage of this device is the low reliability of its operation, since the parts in contact, the piston and the sleeve, which ensure the closing of the butterfly valve, are made of steel susceptible to corrosion, i.e. rust.

Also, the shutoff valve has a large material consumption, since the dimensions of its parts are not optimized in any way. The sleeve is solid, which provides a large consumption of metal when turning it.

The manufacturing technology of the butterfly valve is complex, since the spring stop assembly in the upper part of the piston contains two nuts that must be manufactured specifically for this assembly.

The objective of the invention is to reduce the material consumption of the throttle shutoff valve of the device for installing the liner of the casing string in the well, simplifying the manufacturing technology of the throttle shutoff valve of the device for installing the liner of the casing string in the well, and also to increase the reliability of its operation by improving the design of the throttle shutoff valve.

This object is achieved by the fact that in the throttle check valve of the device for installing the casing liner in the well, including a piston spring-loaded, a sleeve interacting with the piston with at least one nut connected to the sleeve by a threaded connection, and a spring, as well as including spring stop assembly, new is that the sleeve is a composite consisting of two main parts connected by a screw, the main bearing part and the contact part in contact with the piston when triggered a valve-stop valve, while the contact part of the sleeve is made of stainless steel, and for sealing the gap between the parts of the sleeve there is a sealing ring made of rubber or polymer material, in addition, the piston is made of stainless steel, and the piston has a conical protrusion in contact with the conical surface of the contact part of the sleeve when the throttle shutoff valve is activated, and the angle between the generatrix of any of the contacting conical surfaces and the axis of symmetry of the piston lies in at 25 to 35 degrees, in addition, the piston contains an internal cavity, and the ratio of the length of the piston to its maximum diameter is from 2.5 to 3.5, and in addition, the piston is connected to the main bearing part of the sleeve using a nut, having round drilled holes for pumping the working fluid, and the spring stop assembly in the upper part of the piston consists of a washer interacting with the spring and a screw screwed into the piston and pressing the washer against the spring.

The task is also achieved by the fact that the cross section of the coil of the spring has a rectangular shape, with the larger side of the rectangle parallel to the axis of symmetry of the piston.

Figure 1 schematically shows the throttle check valve of the device for installing the liner casing in the well.

Figure 2 shows a section aa of the butterfly valve of the device for installing the liner of the casing string in the well, indicated in figure 1.

Figure 3 schematically shows a longitudinal section of the piston throttle check valve device for installing the liner casing in the well. The letter A indicates the length of the piston. The letter B indicates the maximum diameter of the piston. The letter φ denotes the angle between the generatrix of the conical surface of the protrusion of the conical shape of the piston in contact with the contact part of the sleeve when the throttle-shutoff valve is activated, and the axis of symmetry of the piston Q.

Figure 4 shows a part of the throttle check valve of the device for installing the casing liner in the well, comprising a spring, where the cross section of the spring coil has a rectangular shape, with the larger side of the rectangle parallel to the axis of symmetry of the piston Q.

Figure 5 schematically shows the throttle check valve of the device for installing the liner casing in the well at the time of its operation.

The throttle check valve of the device for installing the casing liner in the well consists of a piston 1, spring-loaded with a spring 2, a sleeve consisting of a main bearing part 3 and a contact part 4 in contact with the piston 1 when the throttle shutoff valve is activated (Fig. 1). The parts of the sleeve 3 and 4 are connected using a screw 5. To seal the gap between the parts of the sleeve 3 and 4, a sealing ring 6 made of rubber or polymer material is installed. The contact part of the sleeve 4 is made of stainless steel. Piston 1 is also made of stainless steel. The main bearing part of the sleeve 3 interacts with the piston 1 by means of a nut 7 connected to the main bearing part of the sleeve 3 by a threaded connection, and the spring 2, and also from the spring stop assembly 2. The spring stop assembly 2 consists of a screw 8 screwed into the piston 1, and washers 9. The washer 9 is pressed against the spring 2 by means of a screw 8. The nut 7 has openings for pumping the working fluid 10 (FIG. 2).

In addition, the piston 1 has a conical protrusion 11 in contact with the conical surface of the contact part of the sleeve 4 when the throttle-shut-off valve is activated (Figs. 1, 3). Moreover, the angle φ between the generatrix of any of the contacting conical surfaces and the axis of symmetry of the piston Q lies within from 25 to 35 degrees. The piston 1 also contains an internal cavity 12. The ratio of the length of the piston A to its maximum diameter B is from 2.5 to 3.5. That is, A / B = 2.5 ... 3.5.

Also, the cross section of the coil of the spring 2 may have a rectangular shape, with the larger side of the rectangle parallel to the axis of symmetry of the piston 1 - Q (figure 4).

The inventive throttle shutoff valve operates as follows. The throttle shutoff valve, together with the device for installing the casing liner in the well, is lowered into the well to a specified depth. After installing the specified device at a predetermined depth in the well, the working fluid is pumped through the throttle shutoff valve to flush the well with a set flow rate that does not allow the throttle shutoff valve to work, that is, to close. After flushing the well, the flow rate of the working fluid is increased to a value at which the throttle shutoff valve is actuated. The piston 1 moves downward, compressing the spring 2, until its conical surface on the protrusion 11 (Fig. 3) contacts the conical surface of the contact part of the sleeve 4. The gap between the piston 1 and the contact part of the sleeve 4 (5) overlaps. Overlapping of the slit occurs as a result of an increase in the pressure of the working fluid on the piston 1 and a decrease in the pressure in the gap between the piston 1 and the contact part of the sleeve 4. The decrease in pressure in the slit between the piston 1 and the contact part of the sleeve 4 is caused by an increase in the speed of the pumped working fluid as a result of an increase in the pressure of the working fluid . In this case, the hydrodynamic pressure forces on the piston 1 must exceed the elastic forces of the spring 2. After the throttle shut-off valve is triggered, that is, when the supply of the working fluid to the well is shut off, the working fluid pressure is additionally increased to the set values and thus provide the response of other components of the shank installation device casing string in the well specified in the prototype [2] and in the analogue [1].

Since the piston 1 and the contact part of the sleeve 4 are made of stainless steel, this increases the reliability of operation of the butterfly valve. The contacting surfaces of these parts are not subject to corrosion and, with appropriate accuracy of their manufacture, will always fit snugly against one.

In addition, the area of the contact surface between the piston 1 and the contact part of the sleeve 4 is determined by the area of the contact surface of the protrusion of the piston 11. The decrease in the area of the contact surface also increases the reliability of operation of the throttle shutoff valve, since in this case the likelihood of a loose contact of the contacting surfaces when the throttle shutoff is triggered is reduced. valve. The contact surface of the protrusion of the piston 11 in this case will fit more tightly to the contact part of the sleeve 4 with constant precision manufacturing of these parts, which simplifies the manufacturing technology of the butterfly valve (Fig.3, 5).

Since the sleeve is not integral, made of stainless steel, but only a part of it, this reduces the consumption of stainless steel butterfly valve.

Due to the fact that the piston 1 contains an internal cavity 12, this also reduces the material consumption of the butterfly valve butterfly valve (stainless steel) (Fig. 3).

The node of the spring stop 2 is simpler compared to the same node specified in the prototype [2], which simplifies the manufacturing technology of the butterfly valve. In addition, it has a lower material consumption compared to the prototype.

The nut 7 has drilled holes of round shape 10 for pumping the working fluid (figure 2). It also simplifies the manufacturing technology of the butterfly valve compared to the prototype [2], where similar holes are made by milling the specified nut.

The angle φ between the generatrix of the conical surface of the protrusion of the conical shape of the piston 11 in contact with the contact part of the sleeve 4 when the throttle-shutoff valve is activated, and the axis of symmetry of the piston Q cannot be less than 25 degrees and not more than 35, since in this case a loose fit of the contacting surfaces when the throttle shutoff valve is triggered. In this case, the angle φ is optimal, which also increases the reliability of operation of the butterfly valve (Fig. 3).

The ratio of the length of the piston A to its maximum diameter B cannot be less than 2.5, since in this case the reliability of operation of the throttle shut-off valve will decrease. Between the piston 1 and the nut 7 there is a gap, and with a small length of the piston 1, the protrusion of the piston 11 may unevenly adhere to the surface of the contact part of the sleeve 4 when the throttle shutoff valve is activated.

The ratio of the length of the piston A to its maximum diameter B cannot be more than 3.5, since in this case, with a large length of the piston 1, the material consumption of the throttle-shut-off valve will unjustifiably increase (Fig. 3).

The specified size ratio is optimal and provides good reliability of operation of the butterfly valve and its minimum material consumption.

Since the cross section of the coil of the spring 2 can have a rectangular shape, with the larger side of the rectangle parallel to the axis of symmetry of the piston 1 - Q, this will further increase the reliability of operation of the butterfly valve when the pressure of the working fluid increases. A spring 2 with the indicated coil cross-section has a more accurate coefficient of elasticity than, for example, a spring with a round coil cross-section, and less undergoes plastic deformation during long-term storage of the butterfly valve in the transport position.

Thus, the throttle shutoff valve of the device for installing the casing liner in the well has high reliability, is technologically advanced to manufacture, and at the same time has minimal material consumption.

INFORMATION SOURCES

1. Patent for the invention of the Russian Federation No. 2368754, ЕВВ 7/20, published September 27, 2009

2. Patent for the invention of the Russian Federation No. 2171366, ЕВВ 43/10, ЕВВ 33/14, published on July 27, 2001.

Claims (2)

1. The throttle check valve of the device for installing the casing liner in the well, including a piston spring-loaded with a spring, a sleeve interacting with the piston with at least one nut connected to the sleeve with a threaded connection, and a spring, and also including a spring stop assembly, characterized in the fact that the sleeve is a composite consisting of two main parts connected by a screw, the main bearing part and the contact part in contact with the piston when the throttle-shut-off valve is activated, while the active part of the sleeve is made of stainless steel, and for sealing the gap between the parts of the sleeve there is a sealing ring made of rubber or polymer material, in addition, the piston is made of stainless steel, and the piston has a conical protrusion in contact with the conical surface of the contact part of the sleeve when throttle shutoff valve, and the angle between the generatrix of any of the contacting conical surfaces and the axis of symmetry of the piston is in the range from 25 to 35 °, in addition, the piston contains lives an internal cavity, and the ratio of the length of the piston to its maximum diameter is from 2.5 to 3.5, and, in addition, the piston is connected to the main bearing part of the sleeve using a nut having drilled round holes for pumping the working fluid, and the spring stop assembly in the upper part of the piston consists of a washer interacting with the spring and a screw screwed into the piston and pressing the washer against the spring.
2. The butterfly valve of the device for installing the casing liner in the well according to claim 1, characterized in that the cross section of the coil of the spring has a rectangular shape, with the larger side of the rectangle parallel to the axis of symmetry of the piston.
RU2011115647/03A 2011-04-20 2011-04-20 Restricting shutoff valve of device for mounting liner string in well RU2463442C1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU885675A1 (en) * 1980-03-03 1981-11-30 Предприятие П/Я А-7899 Safety valve
US4497367A (en) * 1983-02-04 1985-02-05 Stevenson Alan R Liner hanger
RU2171366C1 (en) * 2000-11-22 2001-07-27 Терентьев Сергей Владимирович Device for installation and sealing of casing liner in well
RU2183849C2 (en) * 1999-10-29 2002-06-20 Открытое акционерное общество "НПО Энергомаш имени академика В.П. Глушко" Stabilizer of liquid pressure difference
RU2005100879A (en) * 2005-01-17 2006-06-20 Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД"-ОАО "ПМЗ ВОСХОД" (RU) Modular executive hydraulic hydraulic valve for built-in installation and high pressures
RU2313713C2 (en) * 2005-03-22 2007-12-27 Открытое акционерное общество "АТОММАШЭКСПОРТ" Check valve with axial direction of flow
EP1966526A1 (en) * 2005-12-28 2008-09-10 Prysmian Cables & Systems Limited Pressure relief valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU885675A1 (en) * 1980-03-03 1981-11-30 Предприятие П/Я А-7899 Safety valve
US4497367A (en) * 1983-02-04 1985-02-05 Stevenson Alan R Liner hanger
RU2183849C2 (en) * 1999-10-29 2002-06-20 Открытое акционерное общество "НПО Энергомаш имени академика В.П. Глушко" Stabilizer of liquid pressure difference
RU2171366C1 (en) * 2000-11-22 2001-07-27 Терентьев Сергей Владимирович Device for installation and sealing of casing liner in well
RU2005100879A (en) * 2005-01-17 2006-06-20 Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД"-ОАО "ПМЗ ВОСХОД" (RU) Modular executive hydraulic hydraulic valve for built-in installation and high pressures
RU2313713C2 (en) * 2005-03-22 2007-12-27 Открытое акционерное общество "АТОММАШЭКСПОРТ" Check valve with axial direction of flow
EP1966526A1 (en) * 2005-12-28 2008-09-10 Prysmian Cables & Systems Limited Pressure relief valve

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