Hydraulic down hole valve

FIELD: oil and gas production.

SUBSTANCE: down-hole valve includes housing with channel going through it, ball with through hole installed with the possibility of turning at its axis without longitudinal movement so that through hole coincides and not coincides with the said channel. The said ball axis is installed with the possibility of selective longitudinal movement in relation to the housing not depending upon the said turning.

EFFECT: increase of valve operation reliability via reliable keeping of open and closed position.

13 cl, 9 dwg

 

The technical field

The present invention relates to downhole hydraulic (lube) valves, enabling the Assembly of the tubing in the borehole under pressure by isolating the lower part thereof, and, in particular, to elements of the valves associated with their overlap, Assembly and manufacturing methods of components.

Prior art

Hydraulic valves-lubricators are the valves, enabling installation in the borehole extended structures on a closed hydraulic valve when there is pressure in the well below it. These valves are often used in conjunction with downhole esdv to overlay the pressure under the valve.

Lube devices use the surface of the well, and they include compartments over the mouth of the well, through which gather the layout of the bottom of the drill string with a bottom valve overlapping the pressure in the well. These surface lubricators have restrictions on the length determined by the dimensions of the equipment rig. Well lubricators bypass restrictions on length, characteristic of surface lubricators, due to the introduction of the downhole valve, enabling them to use in the well space length up to thousands of feet to build equipment the project for the bottom of the drill string.

In the past, such as valves used ball valves. They are in General distinguished by the presence of paired control lines suitable to the opposite surfaces of the piston when the reciprocating movement of which is associated with the ball, the latter is rotated 90 degrees between the open and closed positions. To hold the ball in both positions can be used chucks, released under the action of pressure in one of the control lines. An example of this design can be found in patents US 4368871, 4197879 and 4130166. In these patents the ball is rotated on their axes mounted in the bearings. In other designs the ball is given to a straight-line motion at the same time rotated through 90 degrees between the open and closed positions. One example of such implementation is offered by the company Expro Group device 15K Enhanced Landing String Assembly, which includes such hydraulic valve. In other designs combine the rotation and linear motion of the ball and having a separate locking sleeves, hydraulically translated in the locked position of the ball due to the shift and rotation of the sleeve in the closed position of the ball, as shown in patent US 4522370. Some valves are made recoverable at the pump-copressor pipes, such as Halliburton's PESLV4 Lubricator Valve. Sleeve fixing the open position, passing through the ball, as proposed in patent US 4449587. Other designs, such as shown in patent US 6109352 and used in the subsea wellhead equipped with a worm gear pinion and rack to move the ball and applied remotely controlled means for moving for switching the valve between the open and closed positions. In this patent it is stated that both end positions are fixed, but further stated that the same managed the move tool just changes the direction of movement and therefore the valve can change the direction.

The present invention aims at eliminating the drawbacks and to obtain a more "elegant" solutions for downhole hydraulic ball valve. One of the differences is the ability of linear movement for locking in the open position of the ball, which is normally rotated on their axes between open and closed positions. Another difference is related to the method of manufacture of parts that must be cut in the longitudinal direction, so as to preserve the original size of the channel, despite the destruction of part of a wall in longitudinal section of details. Another difference is the ability to build components with a given overall size, so in order to accurately set the pre-load on the offset is provided by the support surface, interacting with the Orb. These and other differences of the present invention will become more clear to experts in the art from consideration of preferred options for performing and accompanying drawings, described below, while understanding that the full scope of the invention defined by the claims.

Summary of the invention

Proposed in the present invention the ball downhole hydraulic valve has a ball rotating on their axes to open or closed position when exposed to the working piston of the line pressure control. The ball also has the ability to move in a fixed open position. In a preferred embodiment, the ball covers the cage and keeps the ball opposite the seat. The cage is made of solid parts, which drilled directed along the tangent channels with chopped them in the thread before the part is cut by the method of electro-erosive cutting. Fasteners connect properly cut half, so to place them with a gap, restoring the original internal size acoustic details. Assistive devices provide the ability to host internal components at such a distance so that you can create by spring required prior the nutrient load on the saddle, adjacent to the ball.

Brief description of drawings

Below the invention is described in more detail with reference to the accompanying drawings on which is shown:

figure 1 - cross section of the hydraulic valve;

figure 2 is an enlarged view of the upper edge of the valve from Fig 1;

figure 3 is an enlarged view of the middle part of the valve 1 when the ball is in the open position;

figure 4 is an alternative view presented in figure 3, with the ball in closed position;

figure 5 is an enlarged view of the lower edge of the valve 1;

figure 6 is a perspective view corresponding to the cross sections of figures 4 and 5;

figure 7 is a view of the top of the valve 1 when assembling, ensure that the appropriate distance between the internal components;

on Fig view of the lower edge of the valve 1 when assembling, ensure that the appropriate distance between the internal components;

figure 9 is a perspective view of cells covering the ball and cut in the longitudinal direction.

Detailed description the preferred option of carrying out the invention

Figure 1 shows the layout of the main components, reflecting their relative position when the ball 10 in the center in the closed position. The sleeve 12 is located above the ball 10 and the sleeve 14 is below it. These bushings are made in accordance with the seat 16 and the seat 18, held the ball 10 cell 20. Cell 20 shown in prospects the formation (MRF) figure 9. The slider 22 passes through the cell 20 and is connected with the bowl 10, turning it between open and closed positions on the rotary axis 24. The piston 26 in response to the pressure in the line management provides the reciprocating movement of the slider 22 that controls the action of the ball 10. Node 28 are locked in the open position is located near the top of the device, while the pre-loaded mechanism 30 is installed near the opposite edge. Using this basic layout the main components of the valve in the other figures will be given for additional details and explained the basic operations.

6 can be used to explain how the ball 10 is rotated 90 degrees between the closed position shown in Fig.6, and the open position shown in figure 3. The piston 26 has the same effect as the majority of the pistons, known in the art and used in downhole valves. Twin line control (not shown) pass from the surface opposite to the working surface of the piston 26 and cause it to move in opposite directions. The piston 26 is bonded to the slider 22 for joint movement. The slider 22 has an upper ring 32 and the lower ring connected by tie-rods 36, one of which is visible in Fig.6. Figure 9 you can see that the cell and eat longitudinal grooves 38 and 40, where are the ties 36 of the slide 22. From a consideration of figures 1 and 6, you can see that the slider 22 is in the highest point of its stroke, where it is in contact with the mandrel 42. The ball 10 has opposite tapered outer grooves 44, one of which is partially visible in Fig.6. Grooves 44 are parallel to each other on opposite surfaces 46, better visible in figure 1. Plane 46 on the ball 10 are associated with the couplers 48 and 50 cells 20, as best seen in figures 6 and 9. The axis 24 is fixed in the holes 52 and 54 and continue into a ball 10, providing the ability to rotate it around its own axis. The cage 22 is stationary, but moving the slider 22 under the action of the piston 26 causes rotation of the ball 10 around its own axis. This is because the coupler 36 is supplied with inferior inside pins (not shown)within the grooves 44 on the ball 10 is offset from the center coincident with the axis 24, which leads to rotation of the ball 10.

For a better understanding of this movement it is necessary to compare figures 3 and 4. Figure 4 shows the balloon 10 in the closed position and the top ring 32, in the vicinity of the mandrel 42, but not in contact with it. While the snap ring 56 coincides with the groove 58 on the sleeve 12 that holds the ball 10 in the closed position until such time as the piston 26 is not applied sufficient pressure to launch a spring retaining ring 56 of the PA is and 58 and move it to fit the groove 60, which corresponds to the open position shown in figure 3. On the other hand figure 4 during normal opening and closing of the ball 10 is the only moving part, except the ball 10 shown in the figures, is the slider 22 with the ring 56. Figure 3 shows the fully open position of the ball 10 when the ring 56, coinciding with the groove 60. Alternatively, the slider 22 can be contacted with the cell 20. Figure 3 shows the piston 26 connected to the slider 22 of the mounting element 62. Figure 3 shows one of the compounds 65 with line management providing the action of the piston 26. Figure 3 also shows that the bushings 12 and 14 formed edges 64 and 66, respectively, and the cell 20 holds both edges close to the ball 10. The edges 64 and 66 posted by seals 16 and 18, respectively, to provide a circular hermetic contact with the ball 10 when it is rotated between the open and closed positions, shown in figures 3 and 4.

Figure 5 you can see the bottom edge of the sleeve 14, and another connection 68 to the main control used for displacement of the piston 26 in the opposite direction compared with the application of pressure through the connection 65, shown in figure 3. The bottom sub 70 has a ledge 72, which rests against the spring 74. The spring 74 pushes the ring 76, United thread 78 with wut is some 14. The pin 80 fixes the position of the ring 76 after it will be in the position originally defined by the action described below. Essentially, the spring 74 is a pre-loaded spring acting on the node, starting with the ring 76 and continuing to the top of the valve shown in figure 2.

Using figure 2 will be described fixing the valve in the open position. In the end, the sleeve 12 is held by the top sub 82. The ledge 84 is fixed ring 86 with rapovymi teeth, coupled with the mandrel 42. The ring 86 has an internal groove 88 with the tapered part 90. The ring 92 is initially placed in an internal groove 88. It has ratchet teeth 94 which, in accordance with figure 2, the distance from hrapovic teeth 96 on the ring 86. The ring 92 abuts against the retaining ring 98, which in turn holds the split ring 100 in the groove 102 of the sleeve 12. Since these parts are interconnected, the sleeve 12 is pressed down to the ball 10 and is experiencing an upward force on the sleeve 14 provided by the spring 74 (see figure 5). The locking sleeve 104 has one (or more) internal groove 106 that serves to connect to some device (not shown), which eventually pulls the sleeve 104 up. Shear pin 108 initially holds the sleeve 104 with the sleeve 12. On vtalk the 12 is a groove 110, in which initially are directed tangentially pins 112 protruding from the sleeve 104. The sleeve 104 is initially holds the ring 92 in the groove 88. In the process mentioned not shown, the device pulls up the sleeve 104, breaking the shear pin 108. As you move the sleeve upward directed tangentially pins 112 are moved in the groove 110 until then, until you come across its top edge, after which the sleeve 104 begins to move together with the sleeve 12. At this time, the sleeve 104 is moved upward from the ring 92, giving him the ability to shrink inward, releasing the tapered portion 90. When the alignment pins 112 with the top of the groove 110 and the movement of the sleeve 12 together with the ring 104 of the ring 100, which is in the groove 102 of the sleeve 12, together with the ring 98 in turn can now push the ring 92 on the tapered portion 90, so that the ratchet teeth 94 will come into interaction with rapovymi teeth 96 on the supplied rapovymi teeth of the ring 86. Upward movement described above will continue until such time as the sleeve 12 reaches the stop motion. This happens in two ways, depending on the position of the ball 10 while pulling up the sleeve 12. If the ball 10 is in the open position, as shown in figure 3, the cell 20 is pulled upwards with the edge 64 as well as the slider 22 is connected with the sleeve 12 at the groove 60. The ball 10 is moved upward together with what letkol 20, because associated with it by the axis 24 of rotation. The ball 10 is not rotated due to the lack of relative movement between the slider 22 and the cage 20. Movement of the sleeve 12 is stopped when the ring 32 will encounter on the mandrel 42, and is fixed by adhesion hrapovic teeth 94 and 96. On the other hand, if the ball 10 is in the closed position, shown in figure 4, the sleeve 12 carries up the cage 20 and moves it relative to the slider 22. This is because under the influence of the movement of the sleeve 12 of the upper ring 32 of the slide 22, is already in the vicinity of the mandrel 42, just a quick reach it during movement of the sleeve 12 and up. When moving up the sleeve 12 extends his cage 20 relative to the slider 22, which causes the pins provided on the slider 22, rotate the ball to the open position, as they interact with the grooves 44 on the ball 10. When the cell 20 will rest against already stopped ring 32 of the slide 22, the upward movement is stopped, and this again is fixed by adhesion hrapovic teeth 94 and 96.

Referring again to figure 2, it can be seen that if desired, the spring 114 may be used to put pressure down on the ring 86 and through the other parts described above, the sleeve 12, which in turn presses on the ball 10 and the sleeve 14, which in turn pushes the spring 74 acting on the Col is about 76, bonded thread 78 with the sleeve 14. This interaction keeps the cage 20 in a fixed position during normal operation of the ball 10, and when the sleeve 104 with 2 pull, allows you to move the cage 20 upward until it reaches a fixed open position, in which the penetration hole 116, passing through the ball 10, is completely open and continues up and down through the sleeve 12 and 14. As it is clear to experts in the field of technology, assembling the parts located between the ledge 84 at the upper edge and the ledge 118 at the lower edge, each has its own tolerance for size, and adjustment, it is possible to install the ring 76 and the screw 78, in fact, minimal. Therefore, before final Assembly with the top sub 82 and the bottom sub 70 may be determined by the total size of the parts situated between the ledges 84 and 118, and determines the position of the ring 76, is necessary to ensure proper pre-load on the collected items. Assembly technology is reflected in the figures 7 and 8.

Instead of Assembly top sub 82 and the spring 114 with the mandrel 42 with it are connected the upper template 122. When fully screw the ledge 124 pushes the ring 86 to the place where the ledge 84 of the top sub 82 properly mates with him. At the same time the lower edge, as shown in Fig, instead of installing the lower p is rabotnika 70, spring pin 74 or 80 on the mandrel 42 screw bottom pattern 124. The lower pattern 124 is coupled console 126 and 128, respectively provided with ledges 130 and 132, which are moving along the thread reach exactly the situation in which there should be a ledge 118 when the screw of the sub 70. Due to the presence of open intervals between consoles 126 and 128 have access to the adjusting ring 76, and it can be moved up or down on the threads 78 before installing the pin 80. The ring 76 by rotation of the lead up to the ledges 130 and 132, and then, turning, raise enough to match the holes 134 and grooves 136 (see figure 5), so that the ring took a fixed position as close to the ledge 118 during Assembly with the bottom sub 70 in which is installed a spring 74. The upper template 122 (7) remove and replace the top sub 82 by spring 114 (figure 2). After screwing the bottom sub 70 with the spring 74, the spring 74 will be adequately pre-loaded, so as, in spite of the accumulation of tolerances of all parts of the design, the actual position of the ring surface 76 defined on the basis of the necessary pre-load of the spring 74.

Figure 9 depicts the fully assembled cell 20. Because of the need to cover the balloon 10 and the edges 64 and 66 (Fig 3) it must be made of two parts. Technologist who I manufacture this product or other products, you want to make of the two parts assembled to each other, is to perform a longitudinal section 140. Before you do, make all the operations of machining, shown in Fig.9, including the execution of the channels 142 and 144 on one side and a similar channel on the other side (not shown)passing through the longitudinal section 140. In addition, before the incision is made in the channels 142 and 144 cause the thread. Then EDM method an incision 140. In this known method in the process of incision removes part of the wall. Therefore, after the connection is cut half their inner diameter 146 is smaller than it was before cutting. However, there is a step caused the thread and the related thread on the rods 148 and 150, through which the connection section 140 half will be divided in the incision area just enough to offset a portion of the wall removed in the cutting process so that final Assembly of the initial diameter 146 of the whole product will be restored as it was before cutting. Although EDM cutting is removed from the wall only a few thousandths of an inch, to perform longitudinal section, the result is still the resizing of the inner channel. This technology drilling and tapping lane is on the implementation of the longitudinal cut electroerosion method gives the possibility of restoring the original size of the channel in the process of connecting the cut halves with each other.

For specialists in this field it is clear that hydraulic ball valve can usually be engaged by the feed pressure in the fuel line control, which moves the piston 26 in opposite directions to rotate the ball around its own axis by 90 degrees when it is open and closed positions. A distinctive feature is the preservation of an open and closed position after their achievement. The valve can be locked in the open position or when the continuation of this situation, or when moving from the closed position due to the release of the upper sleeve 12 and its rise as long as no work ratchet clamp. When ball 10 is in the open position, which maintains the total cross section passing through the valve channel. Although the described ratchet lock that can be considered other fixation devices, such as the dog in the slots, a conical clamping sleeve or other equivalent devices. It should be noted that the longitudinal movement of the ball 10 is used only when an attempt is made to fix its open position. It should be clear that alternative parts may have a different configuration, giving you the opportunity to fix the ball 10 in the closed position.

Another distinctive feature of the proposed hydraulic valve which is pre-load the internal components and the installation of internal components to Assembly of the upper and lower subs with a spring or springs, creating a pre-load, so that could be obtained should the magnitude of this load. Another difference is the method of manufacturing a split in the longitudinal direction of the parts, so that they retain their original inside dimension, despite the destruction of part of a wall when performing a cutting operation. Used drilling methods and application thread before longitudinal cutting electroerosion method with subsequent restoration to almost the initial distance between the joined halves by step inflicted threads and fasteners, introduced in the channel and connecting the longitudinal section. In this particular device in this way can be manufactured cell 20 and the slider 22. This technology has many other applications for the split in the longitudinal direction and having internal channels of the parts to be bonded without the influence of consequences from the use of the cutting process, such as cutting electroerosion method.

Although it was previously shown a preferred embodiment of the invention, the experts in this field should be clear that the scope of the invention is much broader and generally defined by the claims below.

1. The downhole valve comprising a housing (82, 42) passing through it by channel (12, 14), the Sha is (10) with the pass-through orifice (116), mounted to rotate on its axis (24) without longitudinal displacement (20, 22), so that the penetration hole match and did not coincide with the specified channel, and the specified axis (24) of the balloon (10) is installed with the possibility of selective longitudinal movement relative to the body, regardless of the rotation.

2. The valve according to claim 1, comprising opposite seat on the sleeves, which rests on a ball under the influence of the bias force.

3. The valve according to claim 2, in which at least one of the sleeves selectively bonded to the enclosure.

4. The valve according to claim 3, in which the sleeve is made with the possibility of fixing on the body after breaking up and moving.

5. The valve according to claim 4, in which these saddles are held in a ball cage has a slide movably mounted for movement relative to the cell, the ball is fixed in the cell can be rotated and the slider interacts with the Orb offset relative to the center with the provision of the aforementioned mounting of the ball with the possibility of rotation between the open and closed positions, and by selectively moving one of these sleeves in fixed position ball remains in the open position, if it was already open at the beginning of the movement of the sleeve or ball jumps to the specified open position from the closed position due to otnositelnogo move cells and slider, caused by movement of the sleeve.

6. The valve according to claim 5, in which the specified selective fastening of the sleeve to the housing is secured in the first position of the retaining ring, originally held by the movable sleeve which is connected with the sleeve having a recess, giving free course that provides the offset of the lock ring and its longitudinal movement to grip unidirectional ratcheting mechanism on the specified case.

7. The valve according to claim 2, comprising a movably mounted on one of the sleeves of the adjusting ring, designed for the selection, after mounting in the specified case, the distance from one edge of one of the bushings with seats to the recess in the housing with the provision set pre-load bias element, rests on the specified adjustment ring and the ledge.

8. The valve according to claim 7, in which the adjustment ring mounted on the other of the sleeve with the saddle in relation to the previously mentioned sleeve with a saddle which is selectively connected with the case.

9. The valve according to claim 7, including a temporary part of the housing with a slot giving access to the adjusting ring, while the ledge in the same place as the above ledge in the housing, with the possibility of positioning and fixing the adjusting ring on his sleeve floor in the position, required to create a pre-load on these bushings seat after replacing this a temporary part of the body and focus bias element in the specified ledge in the housing and the adjusting ring.

10. The valve according to claim 5, in which at least the slider or the cage is made of solid parts and cut longitudinally to provide a threaded channel, passing on either side of the specified section, so inserted into the respective threaded channel of the fastener parts on the distance compensating for the removal of material during a specified slitting.

11. The valve of claim 10, wherein said incision is made using wire EDM cutting.

12. The valve according to claim 5, in which to provide the specified fixation sleeve with the ball held in the open position, without reducing the amount of the said bore hole in the ball or channel in the body.

13. The valve according to claim 5, containing a piston associated with the slide and connected to the chassis with the possibility of supplying pressure to provide for joint movement in opposite directions of the piston and slider.



 

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18 cl, 5 dwg

FIELD: mining.

SUBSTANCE: facility consists of case with pass-through opening, of shell fixed in pass-through opening where shell projects inward through opening along radius, creates narrowing section of flow area and presents seat for gate, facility also consists of gate made so as to pass into through opening and set on seat. The shell is made deformed, which facilitates gate passing through the narrowing section of flow area, when specified value of force is applied to the gate, and which also limits a circular chamber for fluid medium. The method is disclosed as follows: the device for control over flow is included into a flow string; this device contains the case with passing through opening and the section of narrowing of flow area created by the shell limiting the circular chamber for fluid medium; the shell projects along the radius inward the through opening; the shell presents the seat for the gate; the gate is installed inside the flow string and is set on the seat; pressure in the string is raised above the gate to the first level creating a packing which shuts off the flow of fluid medium inside the string; further pressure of fluid medium in the string is raised to the second level and the gate is forced through via the narrowing section thus opening the string for fluid medium flow.

EFFECT: facilitates temporary shutting off flow and selective opening of string for fluid medium flow.

24 cl, 5 dwg

FIELD: devices adapted to case oil and gas wells, particularly to prevent reverse grout flow from hole annuity into string.

SUBSTANCE: valve has ball slide, which may be thrown down from surface, body provided with elastic member and expandable seat arranged inside it. Elastic member and expandable seat are formed so that through orifice defined in above members may expand up to value equal to ball slide diameter. The valve also has seat support. The seat consists of annular segments displaceable along inner converging downward conical surface formed on seat support by expanding the seat with ball slide. When the ball seat returns in its initial position the segments are pressed one to another due to elastic member flexibility.

EFFECT: increased reliability of casing pipe sealing and resistance to pressure directed from below.

4 dwg

Casing pipe valve // 2298640

FIELD: oil production industry, particularly means for casing pipe centering.

SUBSTANCE: valve comprises limiter with seat and axial side channels, hollow bush and spring-loaded disc slide. Spring-loaded disc slide may cooperate with seat in air-tight manner. Hollow bush is installed in axial channel of the limiter through shear members and is arranged over the side channels to provide side channel sealing. Limiter has through channels located between axial channel and seat. Axial channel is closed with cap from below. Disc slide may move in axial direction without side limiter channels closing.

EFFECT: simplified structure and increased operational reliability of casing pipe valve, possibility of cement grout injection without casing pipe throat loss.

1 dwg

Valve assembly // 2312205

FIELD: distribution devices used in liquid and gaseous medium production systems, particularly in oil and gas production systems.

SUBSTANCE: device comprises body with liquid medium inlet and outer channels, shell secured in the body, piston with rod 8 slidably secured in the shell. Piston is made of magnetic material and includes two parts 6, 7 connected to rod 8 ends. Plate-type shutoff valve 9 is arranged in central part of rod 8. Body comprises upper 1 and lower 2 parts connected with each other by means of coupling 3 so that chamber 14 is created in-between. Shell includes two parts 4, 5. One shell part 4 is installed in upper part 1 of the body. Another part 5 is connected to lower part 2 thereof. Parts 4, 5 are provided with valve seats 10, 11 connected to ends thereof facing each other. Constant magnets 12, 13 are connected to other ends of parts 4, 5. Shutoff valve 9 is arranged in valve chamber 14 and may cooperate with valve seats of sleeve parts 4, 5. Each piston part 1, 2 is arranged in corresponding part shell 4, 5 and may slide and cooperate with constant magnets 12, 13 in extreme positions thereof. Inlet channel comprises two conduits 15, 16 made in upper 1 and lower 2 body parts correspondingly. Outlet channel is made in upper body part 1 and may communicate valve chamber 14 with pump. Gaps 18, 19 are created between shell parts 4, 5 and walls of corresponding body parts 1, 2. Through orifices 20, 21 are made in walls of each part 4, 5.

EFFECT: provision of serial liquid suction from separate cavities arranged at different levels along with suction process continuity maintenance.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to method and system of injecting process fluid medium into well. According to the invention the well is equipped with safety valve controlled from land surface. The valve is controlled by alteration of pressure in the valve control pipeline. Also process fluid medium is pumped into the well so that the flow runs through the valve control pipeline. There is provided running the flow from the valve to a well head and to the aperture of process fluid supply into the well. The system consists of a pipeline connected to the valve control pipeline and containing at least one aperture for process medium supply and one back valve which prevents flow of bed mediums from each aperture for supply of process medium via the pipeline supplying process medium into the valve control pipeline. Also the pipeline supplying process medium is installed at the section of the well below the safety valve so, that at least one aperture for process medium supply is located below the safety valve.

EFFECT: increase efficiency of method and reliability of system for well development.

19 cl, 1 tbl, 1 dwg

FIELD: mining.

SUBSTANCE: facility consists of case with pass-through opening, of shell fixed in pass-through opening where shell projects inward through opening along radius, creates narrowing section of flow area and presents seat for gate, facility also consists of gate made so as to pass into through opening and set on seat. The shell is made deformed, which facilitates gate passing through the narrowing section of flow area, when specified value of force is applied to the gate, and which also limits a circular chamber for fluid medium. The method is disclosed as follows: the device for control over flow is included into a flow string; this device contains the case with passing through opening and the section of narrowing of flow area created by the shell limiting the circular chamber for fluid medium; the shell projects along the radius inward the through opening; the shell presents the seat for the gate; the gate is installed inside the flow string and is set on the seat; pressure in the string is raised above the gate to the first level creating a packing which shuts off the flow of fluid medium inside the string; further pressure of fluid medium in the string is raised to the second level and the gate is forced through via the narrowing section thus opening the string for fluid medium flow.

EFFECT: facilitates temporary shutting off flow and selective opening of string for fluid medium flow.

24 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: invention is related to valves of flap type equipped with leveling device and used as isolating valves in wells or for control of fluid medium motion in other situations. Invention objective is to establish damages for elements of straight-way valve inbuilt in hinged shutter of flap valve, in case of shutter closure by fluid flow and for upper non-discharge side of hinged shutter from contact with control bushing. Unit of flap valve has leveling device with outlet valve element installed with the possibility of displacement between open and closed positions. Peculiar feature of leveling device design is availability of support in the form of stop element fixed on hinged shutter both with axial and radial fixation. Besides, between this support and outlet valve element there is compressed spring installed, which pushes outlet valve element in direction of closed position. Hinged shutter also has pair of substantially flat rising contact platforms on its non-discharge side, which provide for interaction of hinged shutter with control pipe and prevent sliding of deformed material on leveling opening, which may isolate this opening or jam valve element.

EFFECT: provision of possibility to establish damages for elements of straight-way valve inbuilt in hinged shutter of flap valve, in case of shutter closure by fluid flow and for upper non-discharge side of hinged shutter from contact with control bushing.

18 cl, 5 dwg

FIELD: oil-and gas industry.

SUBSTANCE: device contains a tool for installation in a borehole, which has a hole for a fluid medium injection in to the well, a case, which at least partly covers the tool, for the tool eccentrically dislocation relatively to a longitudinal borehole axis, which has a section with a greater width in a radial direction, in a diapason of first angles around the tool's longitudinal axis. The tool's hole oriented under an angle lying-in the first diapason limit.

EFFECT: casing string damage decrease.

16 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: system of control over actuating mechanism of downhole device consists of case of device with channel and at least one connection with control line, of at least one piston with first part communicating with said connection with control line, second part balanced by pressure and preventing effect to said channel, and third part forming at least partially chamber of alternate volume isolated from said channel. If the main system fails, then the reserve system is actuated.

EFFECT: simplicity, reliability and low cost of fabrication.

22 cl, 1 dwg

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