CN207092971U - Layered production string - Google Patents

Abstract

The utility model discloses a layered oil recovery string, which belongs to the technical field of oil and gas exploitation. The layered oil recovery string includes a plurality of packers and a plurality of electric water blocking devices, and two adjacent packers An electric water blocking device is arranged between them, and the lower end of the lowermost packer is connected to one of the electric water blocking devices; the packer and the adjacent electric water blocking device are shorted by oil pipe section connection. The layered oil production string provided by the utility model obtains data such as production capacity, fluidity, and water content of different oil layers while performing layered extraction.

Description

Layered production string

technical field

The utility model relates to the technical field of oil and gas exploitation, in particular to a layered test oil production string.

Background technique

During the normal production process of oil wells, due to the large interlayer differences of different oil layers in the oilfield and the serious interlayer interference, each production layer contributes differently to the overall fluid production capacity. The production capacity, fluidity and water content and other data can guide the formulation of oil and gas production plans.

A prior art provides a layered oil production string, the layered oil production string includes a plurality of packers, and the plurality of packers are connected by tubing nipples. When carrying out oil production in separate layers, set the packer above the oil layer to be exploited, and the oil in the oil layer enters the short joint of the tubing and flows out from the oil wellhead; after that, the packer above the set packer is set The device is set to exploit the oil layer above the exploited oil layer.

In the process of realizing the utility model, the designer finds that the prior art has at least the following problems:

When the layered oil production string provided by the prior art is used for production, the data such as productivity, fluidity and water content of each oil layer cannot be obtained.

Utility model content

In view of this, the utility model provides a layered oil production string, which can obtain data such as production capacity, fluidity and water content of different oil layers by cooperating with other equipment while performing layered oil recovery.

Specifically, the utility model provides a layered oil production string, which includes a plurality of packers and a plurality of electric water blocking devices, and one electric plugging device is arranged between two adjacent packers. A water device, the lower end of the lowermost packer is connected with an electric water blocking device;

The packer is connected to the adjacent electric water blocking device through a short joint of oil pipe.

Optionally, the lower end of the lowermost electric water blocking device is connected with a plug.

Optionally, a tubing anchor is also included, the lower end of the tubing anchor is connected to the upper end of the uppermost packer.

Optionally, a tubing hanger is also included, the lower end of the tubing hanger is connected to the upper end of the tubing anchor.

Optionally, a hands-off joint is provided between the lower end of the tubing hanger and the upper end of the tubing anchor.

Optionally, an oil well pump is arranged between the lower end of the tubing hanger and the upper end of the hands-off joint.

Optionally, the lower end of the tubing hanger and the upper end of the oil well pump, the lower end of the oil well pump and the upper end of the drop joint, the lower end of the drop joint and the upper end of the oil pipe anchor and the The lower end of the tubing anchor is connected to the upper end of the uppermost packer through a tubing nipple and/or a thickened tubing nipple.

Optionally, the electric water blocking device is connected with the ground controller through cables.

The beneficial effect of the technical scheme that the utility model embodiment provides is:

In the layered oil production string provided by the embodiment of the utility model, different oil layers are separated by setting a plurality of packers, and the electric water blocking device and the bottommost packer are arranged between two adjacent packers. The electric water shutoff device under the device can cooperate with other equipment to obtain data such as productivity, fluidity, water content and porosity of different oil layers. Therefore, the layered oil production string provided by the utility model can obtain data such as productivity, fluidity, and water content of different oil layers while performing layered extraction of oil layers.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural view of a layered oil production string in an embodiment of the utility model;

Fig. 2 is a schematic structural diagram of an electric water blocking device in an embodiment of the present invention.

The reference signs in the figure represent respectively:

1. Tubing suspension shortener;

2. The first tubing pup joint;

3. The first thickened tubing nipple;

4. Oil well pump;

5. The second thickened tubing nipple;

6. Screen tube;

7. The third thickened tubing nipple;

8. Dropped connectors;

9. The fourth thickened tubing nipple;

10. Tubing anchor;

11. The fifth thickened tubing nipple;

12. The first packer;

13. The second tubing nipple;

14. The first electric water blocking device;

15. The sixth thickened tubing pup joint;

16. The second packer;

17. The third tubing pup joint;

18. The second electric water blocking device;

19. The seventh thickened tubing nipple;

20. Silk plugging;

21. Casing;

a. Eccentric upper joint;

b. Sealing and positioning tube;

c. Water injection conduit;

d. Positioning tube;

e. On-off valve;

f. Battery cartridge;

g. Pressure sensor;

h. Motor;

i. Controller;

j. Outer sleeve;

k, the lower joint;

l. Cavity;

m. Pressure inlet hole.

Detailed ways

In order to make the technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

An embodiment of the utility model provides a layered oil production string, as shown in FIG. 1 , which cooperates with the casing 21 in the oil well for production operations.

This embodiment provides a layered oil production string, as shown in Figure 1, including a packer 12, a packer 16, an electric water shutoff device 14, an electric water shutoff device 18, a packer 12 and a packer 16 is provided with an electric water blocking device 14, the lower end of the packer 16 is connected to the electric water blocking device 18, the upper end of the packer 12 and the electric water blocking device 14, the lower end of the electric water blocking device 14 is connected to the packer 16 The upper end of the packer 16, the lower end of the packer 16, and the upper end of the electric water shutoff device 18 are connected through a tubing nipple.

The working principle of the layered oil production string provided in this embodiment is described below:

The layered oil production string provided in this embodiment is lowered into the casing of the oil well, so that the electric water blocking device 14 is opposite to the upper oil layer, and the electric water blocking device 18 is opposite to the lower oil layer. First, set the packer 16 to seal off the annulus between the layered production string and the casing below the packer 16; turn on the electric water blocking device 18, and the oil in the oil layer below passes through the casing The perforation enters the electric water shutoff device 18, and flows out of the oil well through the layered oil production string. The electric water shutoff device 18 cooperates with other equipment to obtain data such as the production capacity, fluidity and water content of the oil layer; close the electric water shutoff Device 18, set the packer 12, open the electric water shutoff device 14, the oil in the upper oil layer enters the electric water shutoff device 14 through the perforation on the casing, and flows out through the internal cavity of the layered production string For oil wells, the electric water shutoff device 14 cooperates with other equipment to obtain data such as productivity, fluidity and water content of the oil layer.

The layered oil production string provided by the embodiment of the utility model divides different oil layers by setting the packer 12 and the packer 16, and separates the different oil layers by setting the packer 12 and the packer 16. The electric water shutoff device 18 below the device 14 and the packer 16, in conjunction with other equipment, can obtain data such as productivity, fluidity, water content and porosity of different oil layers. Therefore, the layered oil production string provided by the embodiment of the utility model can obtain data such as productivity, fluidity, and water content of different oil layers while performing layered extraction of oil layers.

It should be noted that in this embodiment, the layered oil production string includes two packers and two electric water shutoff devices as an example. In other embodiments, the layered oil production string may include multiple packers An electric water shutoff device is installed between two adjacent packers, and an electric water shutoff device is connected to the lower end of the bottom packer.

In this embodiment, as shown in Figure 2, the electric water blocking device used includes an eccentric upper joint a, a sealing inspection positioning pipe b, a positioning pipe d, an outer sleeve j, and a lower joint k, wherein the eccentric upper joint a is opened There is a water injection conduit c, the sealing inspection positioning pipe b is vertically connected with the positioning pipe d, and then fixed in the cavity l formed by the connection of the eccentric upper joint a, the outer sleeve j and the lower joint k, the inner wall of the cavity l and the positioning tube There is an annulus between the outer walls of d, which is divided into five independent spaces by insulating partitions, and the battery cartridge f, pressure sensor g, controller i, motor h and switch valve e are respectively fixed in the independent spaces. There is a pressure introduction hole m on the outer sleeve j corresponding to the position of the pressure sensor g, and a threaded through hole is opened on the wall of the positioning pipe d corresponding to the position of the water inlet of the switch valve e, and the switch valve e The water inlet and the positioning pipe d are threaded through the through hole, the shaft of the motor h is connected with the rotation shaft of the switch valve e, and the water outlet of the switch valve e is connected with the water injection conduit c, so that the positioning tube d The liquid in the tank can flow out or in through the water injection conduit c under the control of the switch valve e. The battery cartridge f supplies power to the motor h through the cable, and the pressure signal measured by the pressure sensor g is sent to the pressure signal input end of the controller h through the signal cable.

The controller i is composed of an amplifier, a position encoder, a microprocessor and a solid-state relay, wherein the output terminals of the amplifier and the position encoder are connected to the data input terminal of the microprocessor in turn, and the positive input terminal of the amplifier is used as the pressure signal of the controller i The input terminal, the control signal output terminal of the microprocessor is connected to the start signal input terminal of the solid state relay, and the control signal output terminal that is turned on after starting in the solid state relay is used as the control terminal connected to the power supply circuit of the motor h, on the position encoder The position sensing switch is fixed on the rotating bearing of the switching valve e, so that the switching degree of the switching valve can be sensed. Run the microcomputer communication software in the controller i, use the USB interface to operate the microprocessor chip of the controller, and input information such as layer number, control pressure and control code into the memory in the microprocessing chip. When the controller i is working, it will run its program according to the memory information, and judge the information received by the pressure sensor g. The pressure signal sensed by the sensor g is amplified by the amplifier and sent to the microprocessor for processing. When it is determined that the received signal is true, a drive signal is sent to the motor h, and the position signal output by the position encoder is measured. When it matches the control command sent by the ground, stop the motor drive and position. When it is judged that the signal received by the pressure sensor is false, it performs interference signal processing and waits for the arrival of the next group of signals.

The ground controls the opening and closing of the electric water blocking device in any section of the downhole, or the process of setting the nozzle diameter layer by layer. After receiving the pressure code, through information processing, the action of the micro-motor is controlled, and the switch on the working cylinder is adjusted to the working state, that is, opening, closing or arbitrarily setting the mouth diameter and layering production. Before going into the well, connect the PC and the pressure control switch tool, use the special communication software to input the layer number, control pressure and other parameters into the microprocessor according to the construction requirements, and pre-set the opening or closing instructions, only when the wellhead is suppressed When the generated piezoelectric signal is consistent with the preset command, the piezoelectric control switch starts to act and completes opening or closing. Since the control command is composed of pressure and time combined waves at different intervals, one-to-one reliable control of the downhole piezoelectric switch can be accurately realized. Since the set start pressure is low, the start pressure value can be reached continuously and stably for most production wells. Therefore, the opening and closing of the electric water blocking device of each layer can be controlled arbitrarily on the ground through the piezoelectric signal.

In this embodiment, as shown in FIG. 1 , the lower end of the lower electric water shutoff device 18 is connected to a plug 20 . The plug 20 blocks the bottom of the layered production string, so that the oil that enters the internal cavity of the layered string can only flow out through the oil wellhead.

In this embodiment, as shown in FIG. 1 , the layered production string further includes a tubing anchor 10 , and the lower end of the tubing anchor 10 is connected to the upper end of the uppermost packer 12 . After the layered oil production string is run into the casing, the oil pipe anchor 10 is anchored on the casing, so that the layered oil production string is fixed in the oil well.

In this embodiment, as shown in FIG. 1 , the layered production string further includes a tubing hanger 1 , and the lower end of the tubing hanger 1 is connected to the upper end of a tubing anchor 10 . The tubing hanger 1 plays the role of supporting the tubing string and sealing the annular space between the tubing string and the casing 21 .

In this embodiment, as shown in FIG. 1 , a hands-off joint 8 is provided between the lower end of the tubing hanger 1 and the upper end of the tubing anchor 10 . After the layered oil recovery is completed, put heavy objects into the cavity of the layered oil production string to separate the string on the upper part of the drop-in joint 8 from the drop-in joint 8, and take out the string on the upper part of the drop-in joint 8 from the oil well . The fishing tool can be lowered to salvage the pipe string at the bottom of the hands-off joint 8 from the oil well, or the pipe string at the bottom of the hands-off joint 8 can be discarded in the oil well.

In this embodiment, as shown in FIG. 1 , an oil well pump 4 is arranged between the lower end of the tubing hanger 1 and the upper end of the hands-off joint 8 . The upper end of the pump barrel of the oil well pump 4 is connected with the lower end of the tubing hanger 1 , and the lower end of the pump barrel of the oil well pump 4 is connected with the upper end of the drop joint 8 . When performing layered oil production, after setting the packer 16, turn on the electric water shutoff device 18 and the oil pump 4, and the oil well pump 4 will lift the oil that has entered the pipe string through the electric water shutoff device 18 to the ground; After the packer 12, turn on the electric water shutoff device 14 and the oil well pump 4, and the oil well pump 4 will lift the oil that has entered the pipe string through the electric water shutoff device 14 to the ground.

In this embodiment, as shown in FIG. 1 , a first tubing nipple 2 and a first thickening tubing nipple 3 may be connected between the tubing hanger 1 and the oil well pump 4 . Specifically, the lower end of the tubing hanger 1 can be detachably connected with the upper end of the first tubing nipple 2 through threads, and the lower end of the first tubing nipple 2 can be detachably connected with the upper end of the first thickened tubing nipple 3 through threads. Ground connection, the lower end of the first thickened tubing nipple 3 can be detachably connected with the upper end of the pump barrel of the oil well pump 4 through threads.

In this embodiment, as shown in FIG. 1 , the second thickened tubing nipple 5 , the screen pipe 6 and the third thickened tubing nipple can be connected between the lower end of the pump barrel of the oil well pump 4 and the hands-off joint 8 7. Specifically, the lower end of the pump cylinder of the oil well pump 4 can be detachably connected with the upper end of the second thickened oil pipe nipple 5 through threads, and the lower end of the second thickened oil pipe nipple 5 can be connected with the upper end of the screen pipe 6 through threads. Connected detachably, the lower end of the screen pipe 6 can be connected with the upper end of the third thickened tubing nipple 7 through threads, and the lower end of the third thickened tubing nipple 7 can be detachably connected with the upper end of the drop joint 8 through threads.

In this embodiment, as shown in FIG. 1 , a fourth thickened tubing nipple 9 may be connected between the lower end of the hands-off joint 8 and the tubing anchor 10 . Specifically, the lower end of the hands-off joint 8 can be detachably connected with the upper end of the fourth thickened tubing nipple 9 through threads, and the lower end of the fourth thickened tubing nipple 9 can be detachably connected with the upper end of the tubing anchor 10 through threads. connect.

In this embodiment, as shown in FIG. 1 , a fifth thickened tubing nipple 11 is connected between the lower end of the tubing anchor 10 and the packer 12 . Specifically, the lower end of the tubing anchor 10 can be detachably connected with the upper end of the fifth thickened tubing sub-joint 11 through threads, and the lower end of the fifth thickened tubing sub-joint 11 can be detachably connected with the upper end of the packer 12 through threads. connect.

In this embodiment, as shown in FIG. 1 , the lower end of the packer 12 and the upper end of the electric water shutoff device 14 can be connected with a second tubing nipple 13 . Specifically, the lower end of the packer 12 can be detachably connected with the upper end of the second tubing nipple 13 through threads, and the lower end of the second tubing nipple 13 can be detachably connected with the upper end of the electric water blocking device 14 through threads.

In this embodiment, as shown in FIG. 1 , a sixth thickened tubing nipple 15 may be connected between the electric water shutoff device 14 and the packer 16 . Specifically, the lower end of the electric water blocking device 14 can be detachably connected with the upper end of the sixth thickened tubing nipple 15 through threads, and the lower end of the sixth thickened tubing nipple 15 can be connected with the upper end of the packer 16 through threads. detachable ground connection.

In this embodiment, as shown in FIG. 1 , a third tubing nipple 17 may be connected between the packer 16 and the electric water blocking device 18 . Specifically, the lower end of the packer 16 can be detachably connected with the upper end of the third tubing nipple 17 through threads, and the lower end of the third tubing nipple 17 can be detachably connected with the upper end of the electric water blocking device 18 through threads.

In this embodiment, as shown in FIG. 1 , a seventh thickened tubing nipple 19 may be connected between the electric water blocking device 18 and the plug 20 . Specifically, the lower end of the electric water blocking device 18 can be detachably connected with the seventh thickened oil pipe short joint 19 through threads, and the seventh thickened oil pipe short joint 19 can be detachably connected with the upper end of the plug 20 through threads.

Among them, thicker tubing nipples have better pressure bearing capacity than tubing nipples.

In this embodiment, the packer 12 and the packer 16 can adopt the Y341-114 type. But not limited thereto, other models can also be used in other embodiments of the present invention.

In this embodiment, the electric water blocking device 14 and the electric water blocking device 18 can also be connected with the ground controller through cables. In this way, the operator can control the opening or closing of the electric water blocking device 14 and the electric water blocking device 18 through the ground controller, which is convenient for remote control. The ground controller is connected with the electric water blocking device 14 and the electric water blocking device 18 through cables, and the cables can be fixedly arranged in the pipe wall of the layered oil production string.

The above description is only for those skilled in the art to understand the technical solution of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. A layered oil production string, characterized in that it comprises a plurality of packers and a plurality of electric water shutoff devices, and one said electric water shutoff device is arranged between two adjacent packers, The lower end of the lowermost packer is connected with an electric water blocking device; The packer is connected to the adjacent electric water blocking device through a short joint of oil pipe. 2. The layered oil production string according to claim 1, characterized in that, the lower end of the electric water blocking device at the bottom is connected with a plug. 3. The layered oil production string according to claim 1, further comprising a tubing anchor, the lower end of which is connected to the upper end of the uppermost packer. 4. The layered oil production string according to claim 3, further comprising a tubing hanger, the lower end of the tubing hanger is connected to the upper end of the tubing anchor. 5 . The layered oil production string according to claim 4 , wherein a hands-off joint is provided between the lower end of the tubing hanger and the upper end of the tubing anchor. 6 . The layered oil production string according to claim 5 , wherein an oil well pump is arranged between the lower end of the tubing hanger and the upper end of the drop joint. 6 . 7. The layered oil production string according to claim 6, characterized in that, the lower end of the tubing hanger and the upper end of the oil well pump, the lower end of the oil well pump and the upper end of the drop joint, the The lower end of the drop-off joint is connected to the upper end of the tubing anchor, and the lower end of the tubing anchor is connected to the upper end of the uppermost packer through a tubing nipple and/or a thickened tubing nipple. 8. The layered oil production string according to any one of claims 1-7, characterized in that the electric water blocking device is connected to the surface controller through a cable.