Device for separate operation of two beds of same well

FIELD: oil industry.

SUBSTANCE: device has body with solid wall in central channel and three rows of radial channels. Moving branch pipe is put on the body with a pin. It interacts with figured groove, placed on the body. Stepped cylinder is connected to the body, which by lower end enters a packer, and by upper end is stopped against a spring. It is mounted between end of cylinder and ring-shaped shelf of moving branch pipe. Dependently on position of moving branch pipe connection of behind-pipe space where pump is positioned, occurs to zone of upper or lower productive bed.

EFFECT: simplified construction, higher efficiency, higher reliability.

2 dwg

 

The invention relates to the oil and gas industry, in particular to devices for separate operation of two reservoirs one well.

Known bypass clutch for separate operation of the two layers, comprising a housing with a channel that tells the pump intake with a pipe and the annular space in the upper part of which has a seat under a stop valve. The enclosure is equipped with a limit switch shut-off organ, placed in the upper part of the coupling (A.S. No. 863839, IPC E 21 In 43/14, 1981).

The drawbacks:

- if reservoir pressure vary greatly, only one reservoir;

- inability to hold a separate hydrodynamic formations;

- if the layers have the same pressure, it is impossible to provide separate operation of reservoirs, because they will work both.

The closest in technical essence to the present invention is a device for simultaneously separate operation of two reservoirs one well comprising a casing and a movable nozzle, forming between them an annular chamber, a series of radial channels, spring-shaped groove that interacts with the locking pin, check valve and packer (A.S. No. 330242, IPC E 21 In 43/14, 1972).

Significant disadvantages of the device are:

- the complexity of the design, obuslovlennaya a large number of units and parts and hence high intensity;

- misalignment of the sealing surfaces will create a large resistance of the movable part, which will lead to low efficiency and reliability;

- limited power and energy capabilities of the spring: it will not be able to create a large load to move the movable elements;

the cavity where the spring is, which will lead to clogging impurities and the conclusion of spring failure.

Object of the invention is a device having a simplified design and increased efficiency and reliability in operation.

This problem is solved by the proposed device for the separate operation of two reservoirs one well comprising a casing and a movable nozzle, forming between them an annular chamber, a series of radial channels, spring-shaped groove that interacts with the locking pin, check valve and packer.

What's new is that the body is equipped with a blank wall, overlapping the Central channel, and a movable nozzle is installed on the outside of the casing, a series of radial channels are placed in the housing, and one of them is below the hollow partitions, and the other two above, the spring is installed on the outside of the bore of the rolling pipe between the annular ledge and the upper end face C is lindra, connected to the lower part of the body, on the outer surface of which is shaped groove.

Figure 1 shows the proposed device in longitudinal section lowered into the well.

Figure 2 - scan shape groove.

The device consists of a casing 1 (Fig 1)with a blank partition 2 and three rows of radial channels, one of which 3 is located below the hollow partition, and the other two are 4 and 5 above. In the lower part of the housing 1 on the outer surface shaped groove 6 (figure 2). In case 1 telescopically wearing a movable nozzle 7 with the annular sample 8, forming with the housing an annular chamber and having in the lower part of the cylindrical bore 9 with the annular ledge 10. The locking pin 11 at one end is rigidly connected to a movable nozzle 7, and the other interacts with shaped groove 6. The movable nozzle 7 is partially included in a stepped cylinder 12, which is connected to the housing 1. In the cylindrical bore 9 between the flange 10 and the upper end of cylinder 12 is spring 13. The lower end of the cylinder 12 enters into the body of the packer 14. In the upper part of the body is set centralizer 15. The mating surfaces of the parts provided with sealing rings 16. In the Central channel of the housing 1 between rows 4 and 5 of radial channels is a non-return valve 17.

The device operates as follows.

It is lowered into the well on tubing (tubing) 18 together with the packer or packer down in advance and set above the lower productive formation 19 and thereby cut its annulus from the top productive stratum 20.

During the descent of the device and inserting it in the hole the pin 11 is in position “a” (figure 2), i.e. the radial channels 4 and 5 are located above the end face 21 of the rolling pipe 7 (position I), and the upper reservoir 20 communicates with the internal space of the tubing through the channels 4 and 5. In tubing down the pump, master this layer and make the necessary hydrodynamic studies, and then exploit, for example, to approach the water. Then the operation stop and translate the movable nozzle 7 in position II. To do this in the annulus create excessive pressure under the impact of which is movable nozzle 7, compressing the spring 13 moves downward, the pin 11 also goes down and takes the position “a’” (figure 2). The pressure is released, the movable nozzle 7 under the influence of spring 13 rises up and takes the position II, in which the rows of channels 1 and 2 through the medium of the sample 8 are connected, and podvecerni space, i.e. the area of the lower productive formation 19 communicates with the space above the device. Pin 11 will go in position “b”. Spend the necessary hydrodynamic studies to establish the parameters of the lower productive formation.

Then the upper reservoir 20 are cut off. To do this in the annulus again create a surplus on the pressure, the movable nozzle 7 moves downward, the pin 11 moves from position “b” to position “b′” (2), the pressure is released, the movable nozzle 7 under the influence of spring 13 rises up and covers the range of 3 radial channels 9 (position III). Pin 11 will go in position “b” (figure 2). Podvecerni space, i.e. the area of the bottom of the reservoir, is connected with the inner space of the tubing. Again include the pump and now exploit the lower reservoir 19.

If you want to go for operation of the upper productive formation of the lower reservoir off by transferring the movable pipe 7 from position III to position I by carrying out the above operations.

The proposed device, in comparison with the known, is much simpler in design, components and parts of it have a high work′sposobnostey and reliable in operation.

Device for the separate operation of two reservoirs one well comprising a casing and a movable nozzle, forming between them an annular chamber, a series of radial channels, spring-shaped groove that interacts with the locking pin, check valve and packer, characterized in that the housing is equipped with a blank wall, overlapping the Central channel, and a movable pipe is installed with the outer side the us corps a series of radial channels are placed in the housing, and one of them is below the hollow partitions, and the other two above, the spring is installed on the outside of the bore of the rolling pipe between the annular ledge and the upper end of the cylinder connected to the lower part of the body, on the outer surface of which is shaped groove.



 

Same patents:

FIELD: mining industry.

SUBSTANCE: at least one pipes column is lowered into well with constant or variable diameter with or without plugged end, with at least one packer lowered below upper bed of hydraulic and/or mechanical effect with or without column separator. Below and above packer mounting assemblies are lowered in form of well chamber, or nipples with removable valve for feeding working agent through them respectively into lower and upper beds, mounting packer and pressing it from downwards and/or upwards. Minimal absorption pressure for each bed is determined during pressing. Working agent is pumped from mouth into pipes column hollow at given pressure, directing it into upper and/or lower beds through appropriate detachable valves in mounting assemblies. Total flow of working agent is measured on the surface as well as mouth pressure and/or temperature in pipes column hollow and behind-pipe well space. Face pressure of upper bed is determined as well as pressure in pipes column and behind-column space at depth of detachable valve in mounting assembly above the packer. Flow of working agent pumped into upper bed through detachable well is determined, subtracted from total flow and flow of working agent fed into lower bed is determined. Actual flows of working agent for beds are compared to planned values. In case of differences mouth pressure is changed ad/or detachable valves for one or more beds are extracted from mounting assemblies by rope gears. Their characteristics and/or parameters are determined and altered. After that each detachable valve is mounted again into appropriate mounting assembly by rope gears and pumping of working agent through them into appropriate beds is resumed.

EFFECT: higher efficiency.

25 cl, 11 dwg

FIELD: oil and gas extractive industry.

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EFFECT: higher efficiency.

1 dwg, 3 cl

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The invention relates to the oil and gas industry

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FIELD: oil and gas extractive industry.

SUBSTANCE: device has operation columns of upper and lower well zones, placed eccentrically one inside the other in upper zone of well, double airlift column, mounted in upper well zone, and double airlift column, connected to operation well of lower well zone, separation column, mounted coaxially to operation column of upper well zone, and cementation pipe. According to invention, in a well with significant power of non-productive zone it is equipped with additional separating column with cleaning channels for lowering drilling tool therein and drilling well to lower well zone with removal of drilling slurry by double airlift column of upper zone through cleaning channels. Additional separating column is combined coaxially with operation column of lower well zone and is rigidly fixed to separation column.

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1 dwg, 3 cl

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EFFECT: higher efficiency.

25 cl, 11 dwg

FIELD: oil industry.

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EFFECT: simplified construction, higher efficiency, higher reliability.

2 dwg

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EFFECT: simplified construction, higher reliability, higher durability.

2 dwg

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