RU98469U1 - DEVICE FOR REGULATING LIQUID TAKE-OFF IN A WELL OPERATION PROCESS - Google Patents

Abstract

 1. A device for regulating fluid withdrawal during operation of a well, comprising a main packer comprising a housing with a thrust pipe at the top, a filter at the bottom and an elastic sleeve installed between the upper and lower layers, and a control unit, the housing with radial channels of which is connected to the thrust pipe, characterized in that it is provided with an additional through packer installed above the upper layer and communicated from below with a thrust pipe, the main and additional packers provided with a lower and with anchors that hold down and up, respectively, the control unit body is provided around the radial channels with longitudinal bypass channels communicating the sub-packer well space with the overpacker, and the radial channels of the control unit body are equipped with an adjustable nozzle-nozzle on top to limit selection from the upper formation and message between-packer well space with over packer. ! 2. A device for regulating fluid withdrawal during a well operation according to claim 1, characterized in that the radial channels of the body of the regulatory unit are located below the upper formation. ! 3. A device for regulating fluid withdrawal during operation of a well according to claim 1 or 2, characterized in that the thrust pipe is equipped with a check valve below the control unit.

Description

The technical solution relates to oil production and is intended to regulate fluid withdrawal during the operation of wells.

The well-known "downhole installation for simultaneous-separate development of several operational facilities" (patent RU No. 2211311, ЕВВ 43/14, publ. 08/27/2003), consisting of a pipe string with one or more packers, characterized in that the installation is equipped with sections located above and / or below the packer with technical parameters made depending on the geological and field characteristics of the corresponding operational facilities, each section including at least one borehole chamber and / or one nipple with th therein a valve regulating flow, with at least one or more packers equipped disconnector top of the pipe string and / or telescopic connection.

The disadvantage of this installation is the possibility of the formation of a water cone due to the presence of receiving holes above the reservoir, low reliability due to the presence of control valves inside the sections of the device, which can lead to their sludge and failure, the high cost and complexity of the design due to the large the number of mating movable nodes and parts.

The closest to the achieved result is the "Device for regulating the selection of fluid during the operation of the well" (patent PM RU No. 44742, ЕВВ 43/12, 43/14, publ. 03/27/2005), containing a packer, comprising a housing and an elastic cuff and regulating node, characterized in that it is equipped with a landing tool in the form of a nozzle and a thrust nozzle connected by shear elements, and the packer is equipped with a mandrel connected from above to the stop nozzle and from below to the packer body, the latter, in turn, connected to the support coupling with the possibility of longitudinal movement, based on a lower pipe equipped with a filter; the control unit is rigidly installed in the coupling of the thrust pipe inside the landing tool and is made in the form of a differential valve, the locking body of which is spring-loaded from top to bottom, and its body is equipped with radial channels communicating the internal space of the device with the well.

The disadvantages of this device are the high metal consumption and, as a consequence, the high cost due to the support on the bottom of the device, the ability to work only with formations, the lower one of which has higher reservoir pressure, the irrational mode of operation of the upper formation, since it is not cut off from the top of the well and, as a result, due to the presence of a liquid column of gas from the upper part of the well, the impossibility of consciousness of depression on the upper layer.

The technical task of the proposed utility model is to create a simple and reliable device that is capable of working with two reservoirs, the upper of which has a greater reservoir pressure, while allowing more effective impact on the upper reservoir due to the packer installed above the upper reservoir.

A device for regulating fluid withdrawal during well operation, comprising a main packer comprising a housing with a thrust pipe at the top, a filter at the bottom and an elastic sleeve installed between the upper and lower layers, and a control unit, a housing with radial channels of which is connected to the resistant pipe.

What is new is that it is equipped with an additional through packer installed above the upper layer and communicated from the bottom with a thrust pipe, the main and additional packers provided with lower and upper anchors that hold down and up, respectively, and the control unit housing is provided with longitudinal bypasses around the radial channels channels communicating the under-packer space of the well with the over-packer, and the radial channels of the casing of the regulatory unit on top are equipped with an adjustable nozzle (fitting) for Neighboring selection of the top layer and Posts mezhpakernogo well nadpakernym space.

New is also the fact that the radial channels of the body of the regulatory unit are located below the upper layer.

Also new is the fact that the thrust pipe is equipped with a check valve below the control unit.

Figure 1 shows a device for regulating fluid withdrawal during operation of a well.

Figure 2 shows a section aa of the device (see Figure 1).

A device for regulating the selection of fluid during operation of the well 1 (Figure 1) contains a main packer 2, including a housing 3 with a thrust pipe 4 at the top, a filter 5 at the bottom and an elastic cuff 6 and installed between the upper 7 and lower 8 layers, and a control unit 9 , the housing 10 with radial channels 11 of which is connected to the thrust pipe 4. The device is equipped with an additional through packer 12 installed above the upper layer 7 and communicated from below with the thrust pipe 4. The main 2 and additional 12 packers are provided with a lower 13 and the top 14 anchors holding respectively from moving down and up. The housing 10 of the control unit 9 is provided around the radial channels 11 with longitudinal bypass channels 15 (FIG. 2), communicating the under-packer space 16 (FIG. 1) of the well 1 with the over-packer 17. The radial channels 11 of the housing 10 of the control unit 9 are provided with an adjustable nozzle (fitting) from above 18 to communicate the inter-packer space 19 of the well 1 with the over-packer 17. To prevent the formation of a water cone, the radial channels 11 of the housing 10 of the regulatory unit 9 can be located below the upper formation 7. The thrust pipe can be equipped with a lower control separating unit 9, the check valve 22 to avoid overflows of the product from the upper to the lower reservoir 7 8.

The device operates as follows.

The main packer 2 (for example, the PRO-YamO2 packer of JSC “Packer”, Oktyabrsky) with a filter 5 and an anchor 13 that holds it down into the well 1 is lowered and installed using a planting tool (not shown in FIG. 1) above the lower layer 8 case 3 of the packer 2 from moving downward and falling to the bottom of the well 1, and the elastic cuff 6 isolates the borehole space between the layers 7 and 8. Then, an additional through-hole packer 12 is lowered into the well 1 (for example, the Packer PRO-YVZh JSC Packer, g .October) with thrust pipe 4, regulating node 9 and anchor 14 to vza actions with fixing in the case 3 of the packer 2 of the stop pipe 4. After that, the additional packer 12 is unloaded on the main packer 2, isolating the borehole space above the upper formation 7, and is fixed from moving up by the anchor 14 using the landing tool (not shown in Fig. 1) . After installing the packers 2 and 12 into the well on the pipe string 20, the submersible pump 21 is lowered, which is located above the additional packer 12, and put into operation. As a result, the products of the lower layer 8 from the sub-packer space 16 along the thrust pipe 4 through the longitudinal bypass channels 15 (FIG. 2) of the housing 10 of the regulating unit 9 (FIG. 1) and the passage packer 12 enter the over-packer space 17, and the products of the upper layer 7 from the interpacker space 19 through the radial channels 11 of the housing 10 of the regulating unit 9 and the nozzle (fitting) 18 (to reduce the in-situ pressure of the upper layer 7) through the thrust pipe 4 through the in-line packer 12 enters the overpacker space 17. The products of the upper 7 and lower about 8 layers from the above-packer space 17, the pump 21 rises to the day surface along the pipe string 20. At the same time, the nozzle (fitting) 18 is selected so that while sampling the products of the upper 7 and lower 8 layers with the pump 20, lower the bottomhole pressure to increase the selection from the lower layer.

The thrust pipe may be equipped with a check valve 22 below the control unit 9 to prevent product flows from the upper layer 7 to the lower 8 if there are stops of the pump 21.

The proposed device is a simple and reliable design, made with the possibility of working with two productive formations, the upper of which has a greater reservoir pressure, while allowing more effective impact on the upper reservoir due to the packer installed above the upper reservoir.

The device provides a decrease in the selection of associated water from the upper reservoir by compressing it with two packers and choking, which allows to reduce bottomhole pressure and increase oil withdrawal from the lower reservoir, which has a low pressure.

Claims (3)

1. A device for regulating fluid withdrawal during operation of a well, comprising a main packer comprising a housing with a thrust pipe at the top, a filter at the bottom and an elastic sleeve installed between the upper and lower layers, and a control unit, the housing with radial channels of which is connected to the thrust pipe, characterized in that it is provided with an additional through packer installed above the upper layer and communicated from below with a thrust pipe, the main and additional packers provided with a lower and with anchors that hold down and up, respectively, the control unit body is provided around the radial channels with longitudinal bypass channels communicating the sub-packer well space with the overpacker, and the radial channels of the control unit body are equipped with an adjustable nozzle-nozzle on top to limit selection from the upper formation and message between-packer well space with over packer. 2. A device for regulating fluid withdrawal during a well operation according to claim 1, characterized in that the radial channels of the body of the regulatory unit are located below the upper formation. 3. A device for regulating fluid withdrawal during operation of a well according to claim 1 or 2, characterized in that the thrust pipe is equipped with a check valve below the control unit.