RU2261389C2 - Cut-off device - Google Patents

Abstract

FIELD: mining art, in particular, petroleum-gas industry, designed for use in the mouth equipment for oil-gas wells in operation of oil pipe-lines, water conduits, gas conduits.

SUBSTANCE: the cut-off device has a body with ducts for passage of liquid. The body is made of two aligned branch pipes. The inner ducts of the branch pipes are hydraulically coupled by radial holes to a by-pass bush. The bush is installed for motion relative to the body axis. The body branch pipes are interconnected through a threaded connection to the centering surfaces. Flanges are made at the ends of the branch pipes. Annular grooves are made on the inner diameter of the by-pass bush for flow of liquid. The annular grooves are hydraulically connected by intersecting holes. These holes are made in the wall of the by-pass bush. Open grooves are made on the outside diameters of the flanges. A crosspiece with a central hole for the eccentric with control levers is positioned in these grooves, it connects the body to the flanges. The eccentric is engageable with the by-pass bush through a seat for combination or overlapping of the radial holes and annular grooves at rotation of the control levers.

EFFECT: enhanced reliability of device operation, reduced force of control in service, provided maintainability and competitionability.

2 cl, 2 dwg

Description

The invention relates to the field of mining, in particular to the oil and gas industry, and can be used in wellhead equipment for oil and gas wells, in the operation of oil pipelines, water pipelines, gas pipelines.

Known locking devices containing a housing, locking elements, actuator, flange connection elements [2] ÷ [4].

The disadvantages of the known locking devices are the design complexity due to the large elemental base, complexity in the manufacturing process and, as a rule, unreliability during operation.

A locking device is known, comprising a housing with channels for fluid passage, the housing being made of two nozzles coaxially connected to each other, the internal channels of the nozzles are hydraulically connected by radial holes with a bypass sleeve mounted to move relative to the axis of the housing. [1]

The disadvantages of the known device are insecurity during operation, which leads to unreasonable consumption of material and labor resources.

The objective of the invention is to increase reliability, to reduce control efforts during operation, to ensure competitiveness and maintainability.

The technical result is achieved by the fact that the locking device containing the housing with channels for the passage of fluid, the housing is made of two coaxially interconnected pipes, the internal channels of the pipes are hydraulically connected by radial holes with a bypass sleeve mounted to move relative to the axis of the housing, characterized in that the nozzles of the body are interconnected through a threaded connection with the centering surfaces, flanges are made at the ends of the nozzles, and on the inner diameter the bypass sleeve is made annular grooves for the fluid flow, which are hydraulically connected by intersecting holes made in the wall of the bypass sleeve, while on the outer diameters of the flanges open grooves are made and there is a connecting housing with the crosshead flanges with a central hole for the cam with control levers, interacting with the bypass sleeve through the socket for combining or overlapping radial holes and annular grooves when rotating the control levers.

To ensure reduction of rotation efforts by the control levers during operation of the shut-off device, radial and intersecting holes are placed evenly around the circumference.

Figure 1 shows the locking device in the "open" position.

Figure 2 shows the locking device in the closed position.

The locking device contains

a housing with channels, made in the form of two coaxially interconnected nozzles 1,

threaded connection with centering surfaces 2,

flange connection elements 3,

internal channels 4 of the housing 1,

radial holes 5,

ring grooves 6,

bypass sleeve 7,

outer diameter 8 of the housing 1,

intersecting holes 9,

open slots 10,

traverse 11,

traverse hole 12,

clown 13,

control levers 14,

locking screw 15,

nest 16,

seals 17,

wipers 18,

bolts 19,

housing axis 20,

o-rings 21.

In the statistical position, the elements of the shut-off device interact as follows.

Pipes with elements of the flange connection 3, internal channels 4 and radial holes 5 are connected to each other through a threaded connection with the centering surfaces 2, forming a housing with channels, made in the form of two coaxially interconnected pipes 1.

After, for example, milling the open grooves 10 and finishing machining, for example, accurate turning or grinding along the outer diameters of the nozzles 8 assembly with the manufacture of annular grooves for seals 17, the housing is disconnected into the nozzles.

Seals 17 are installed in the annular grooves of the nozzles.

The bypass sleeve 7 with wipers 18, with annular recesses 6 and intersecting holes 9 through the seals 17 is put on the outer diameter 8 of the nozzle and through the bypass sleeve 7 and the threaded connection with the centering surfaces 2 of the nozzle are coaxially connected to each other, forming the housing 1 of the locking device.

A traverse 11 with an eccentric 13 and control levers 14 passing through an opening in the traverse 12, interacting with the socket 16, made in the bypass sleeve 7, is installed in the open grooves 10 by means of bolts 19.

The control levers 14 are fixed with a locking screw 15.

Through the sealing rings 21, the locking device is installed, for example, on wellhead equipment or, for example, on an oil and gas pipeline.

In the dynamic position, the locking device operates as follows:

In the open position (Fig. 1), the pumped medium (liquid, gas) through the internal channels 4 of the housing 1, the radial holes 5, the ring grooves 6, the intersecting holes 9 made in the bypass sleeve 7, is transported according to the specified technological schedule in the direction indicated by arrows .

To overlap the shut-off device, for example, on the wellhead equipment or on the oil and gas pipeline, the eccentric 13 is rotated by the control levers 14.

The eccentric 13, interacting through the socket 16, moves the bypass sleeve 7 relative to the axis of the housing 20, which copies the movement of the eccentric, rotates and moves in the closed position (figure 2), blocking the hydraulic communication channels 5, 6, 9 of the locking device.

Both in the open and in the closed positions (FIG. 1, FIG. 2), the seals 17 ensure the shutoff device is leakproof at a pressure of MPa (kgf / cm ² ) 35 (350), excluding the ingress of the pumped liquid or gas into the environment.

Wipers 18 clean the outer diameter 8 of the housing 1 from dust, dirt and precipitation when moving the bypass sleeve 7 relative to the axis of the housing 20.

Radial 5 and intersecting 9 holes evenly spaced around the circumference provide balanced loads of the bypass sleeve 7 on the outer diameter 8 of the housing 1, which in turn provides lightness.

Sources of information

1. RU 94041194 A1, cl. F 16K 3/24, 1996

2. RU No. 2168091 C2, 7 F 16 K 5/04, 1999

3. RU No. 2168604 C2, 7 E 21 B 33/03, 1996

4. French patent FR 2694362 Al, F 16 K 5/04, 1994

5. A.S. No. 494554, F 16 K 5/16, 1976

6. US patent No. 3700003, F 16 K 5/10, 1972

7. US Patent No. 4111261 A, 1978

8. US Patent No. 5067563 A, 1991

9. US Patent No. 5076356 A, 1991.

10. RU No. 2088830 C1, 6 F 16 K 5/16, 1997

11. RU No. 2088831 C1, 6 F 16 K 5/6, 1997

12. RU No. 2097634 C1, 6 F 16 K 5/10, 1997

13. RU No. 2097635 C1, 6 F 16 K 5/10, 1997

14. SU No. 1606789 A1, F 16 K 5/16, 1988

Claims (2)

1. The locking device containing a housing with channels for the passage of fluid, and the housing is made of two coaxially interconnected nozzles, the inner channels of the nozzles are hydraulically connected by radial holes with a bypass sleeve mounted to move relative to the axis of the housing, characterized in that the nozzles of the housing are connected to each other through a threaded connection with centering surfaces, flanges are made at the ends of the nozzles, and ring outlets are made on the inner diameter of the bypass sleeve openings for fluid flow, which are hydraulically connected by intersecting openings made in the wall of the bypass sleeve, with open grooves made on the outer diameters of the flanges and placed in them a connecting body with the crosshead flanges with a central hole for the clown with control levers interacting with the bypass sleeve through a slot for combining or overlapping radial holes and annular grooves when rotating the control levers. 2. The locking device according to claim 1, characterized in that the radial and intersecting holes are placed evenly around the circumference.

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