CN107725021A - A kind of unlimited level intelligence sliding bush apparatus of horizontal well - Google Patents

Abstract

The invention discloses an unlimited level intelligent sliding sleeve device for horizontal wells. The ground detector, the first electrode, the upper cylinder and the lower cylinder are all welded on the central cylinder, the upper cylinder, the central cylinder, and the lower cylinder communicate with each other, the upper end of the central cylinder is provided with a fracturing port, and the sliding sleeve is installed In the inner cavity of the central cylinder, the sliding sleeve and the inner cavity form a chamber, which is composed of an upper chamber and a lower chamber. The upper end of the upper chamber is provided with a first hydraulic pipe and a second hydraulic pipe. The lower end of the chamber is provided with a third hydraulic pipe and a fourth hydraulic pipe. The two-position four-way solenoid valve is connected to the hydraulic tank through the pipeline. The command receiving device, switch detection and signal transmitting device, and the first electrode are installed in the central cylinder. . The invention has reasonable design; the design of the sliding sleeve can be used for drilling and grinding, and the two-position four-way solenoid valve can be used for arbitrary switching of hydraulic pipes.

Description

An intelligent sliding sleeve device with unlimited levels for horizontal wells

technical field

The invention relates to the field of horizontal well fracturing, in particular to an intelligent sliding sleeve device with unlimited levels for horizontal wells.

Background technique

Horizontal well drilling technology is an advanced technology to increase single well production and efficiently develop low-permeability oil and gas reservoirs. Due to the long reservoir section and strong heterogeneity of horizontal wells, if conventional methods are used for stimulation, the pertinence is not strong and the effect is poor. Staged fracturing technology is currently the best method for exploiting low-porosity and low-permeability oil and gas reservoirs. The staged fracturing and completion technology of horizontal wells is mostly realized by sliding sleeve devices. Sleeves are also known as pitching slides.

After practice, the pitching sleeve has the following problems in actual use:

1. Most of the pitching sleeves can only be used in vertical or inclined wells;

2. The pitching sleeve cannot be self-locked after opening;

3. When the pitching sleeve is gritted, the low-density ball cannot enter the ball seat smoothly, which will cause the pitching sleeve to not open normally;

4. When the material used to make the ball seat is not a drillable material, the circumferential fixation between the inner sliding sleeve and the outer cylinder cannot be realized, so the drilling and grinding of the ball seat cannot be carried out by drilling and grinding, which will affect the oil well Drainage and subsequent production.

Contents of the invention

The object of the present invention is to provide an intelligent sliding sleeve device with unlimited levels for horizontal wells, so as to solve the above-mentioned technical problems.

To achieve the above object, the present invention adopts the following technical solutions:

An unlimited level intelligent sliding sleeve device for horizontal wells, including an upper cylinder, a central cylinder, a lower cylinder, a sliding sleeve, a two-position four-way solenoid valve, a command receiving device, a switch detection and signal transmitting device, a ground detector, The first electrode, the upper cylinder and the lower cylinder are all welded on the central cylinder, the upper cylinder, the central cylinder, and the lower cylinder communicate with each other, the upper end of the central cylinder is provided with a fracturing port, and the sliding sleeve is installed in the center In the inner cavity of the cylinder, the sliding sleeve can move up and down along the inner cavity. The sliding sleeve and the inner cavity form a chamber. The chamber is composed of an upper chamber and a lower chamber. The outer wall of the sliding sleeve is welded with protrusions. The chamber is divided from one another, the upper end of the upper chamber is provided with a first hydraulic pipe, the second hydraulic pipe, the lower end of the lower chamber is provided with a third hydraulic pipe, a fourth hydraulic pipe, the first hydraulic pipe, the second hydraulic pipe The hydraulic pipe, the third hydraulic pipe and the fourth hydraulic pipe are all connected to the two-position four-way solenoid valve, the two-position four-way solenoid valve is connected to the hydraulic tank through the pipeline, and the two-position four-way solenoid valve and the hydraulic tank are installed in the central cylinder , the command receiving device, the switch detection and signal transmitting device, and the first electrode are installed in the central cylinder, the command receiving device, the switch detecting and signal transmitting device are installed in the cavity, the cavity is sealed, and the first electrode Corresponding to the second electrode on the ground, the ground detector is connected with the command receiving device, switch detection and signal transmitting device in the intelligent sliding sleeve. The ground detector uses the electromagnetic wave information transmission system for information transmission, and the intelligent sliding sleeve is installed in the positioning tube .

Preferably, the upper cylinder is provided with internal threads, and the lower cylinder is provided with external threads.

Preferably, the outer surface of the sliding sleeve is wrapped with a sealing ring.

Preferably, a storage battery is also provided in the central cylinder, and the storage battery is electrically connected to the command receiving device, the switch detection and signal transmitting device, and the two-position four-way solenoid valve.

Compared with the prior art, the present invention has the following advantages: the design of the present invention is reasonable; the intelligent sliding sleeve device is lowered into the horizontal well section with the casing at the same time, thereby avoiding the problem that most of the ball-pitching sliding sleeves can only be used in vertical wells or inclined wells, At the same time, the two-position four-way solenoid valve, the command receiving device, the switch detection and the signal transmitting device can independently receive the commands on the ground, and the level is not limited; Pipe, the third hydraulic pipe, and the fourth hydraulic pipe supply and cut off the liquid to change the pressure of the upper chamber and the lower chamber to realize the up and down movement of the sliding sleeve. When the sliding sleeve is opened, it can also perform self-locking operation; this kind of The sliding sleeve device can also perform drilling and grinding operations; the command receiving device on the intelligent sliding sleeve device decodes after receiving the command sent by the ground detector, and the corresponding sliding sleeve of a certain level is opened. After the cracking is completed, the ground detector sends a command to close the sliding sleeve, and the command receiving device on the intelligent sliding sleeve device receives the closing command to execute the closing action. During the closing process of the sliding sleeve, the switch detection and signal transmitting device work to detect in real time The displacement of the sliding sleeve and the measurement results are transmitted to the ground through the formation information transmission channel, realizing the intelligent switch of the sliding sleeve.

Description of drawings

Fig. 1 is a schematic diagram of an unlimited-level intelligent sliding sleeve device for a horizontal well of the present invention.

Fig. 2 is a schematic diagram of a two-position four-way solenoid valve of an unlimited-stage intelligent sliding sleeve device for a horizontal well of the present invention.

Fig. 3 is a diagram of the control system of the intelligent sliding sleeve device for horizontal wells of the present invention.

In the figure: 1. Upper cylinder, 2. Sliding sleeve, 3. Upper chamber, 4. Lower chamber, 5. Inner cavity, 6. Center cylinder, 7. Cavity, 8. Command receiving device, 9. Switch detection and signal emission device, 10, lower cylinder, 11, first electrode, 12, hydraulic tank, 13, two-position four-way solenoid valve, 14, third hydraulic pipe, 15, fourth hydraulic pipe, 16, first One hydraulic pipe, 17, second hydraulic pipe, 18, fracturing port, 19, ground detector, 20, second electrode, 21, positioning pipe, 22, intelligent sliding sleeve.

detailed description

The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1-3, an intelligent sliding sleeve device with unlimited levels for horizontal wells includes an upper cylinder 1, a central cylinder 6, a lower cylinder 10, a sliding sleeve 2, a two-position four-way solenoid valve 13, and a command receiving Device 8, switch detection and signal transmitting device 9, ground detector 19, first electrode 11, the upper cylinder 1 and the lower cylinder 10 are welded on the central cylinder 6, and the upper cylinder 1 is provided with internal threads , the lower cylinder 10 is provided with external threads, and the sliding sleeve device is easy to connect with the casing through internal threads and external threads. The upper cylinder 1, the central cylinder 6, and the lower cylinder 10 communicate with each other, and the upper end of the central cylinder 6 is opened There are fracturing ports 18. The sliding sleeve 2 is installed in the inner cavity 5 of the central cylinder 6. The sliding sleeve 2 can move up and down along the inner cavity 5. The outer surface of the sliding sleeve is wrapped with a sealing ring. The sliding sleeve 2 and the inner cavity 5 to form a chamber, the chamber is composed of an upper chamber 3 and a lower chamber 4, a protrusion is welded on the outer wall of the sliding sleeve 2, and the protrusion divides the chamber, and the upper end of the upper chamber 3 is provided with The first hydraulic pipe 16, the second hydraulic pipe 17, the lower end of the lower chamber 4 is provided with the third hydraulic pipe 14, the fourth hydraulic pipe 15, the first hydraulic pipe 16, the second hydraulic pipe 17, the third hydraulic pipe 14, The fourth hydraulic pipe 15 is connected to the two-position four-way solenoid valve 13, the two-position four-way solenoid valve 13 is connected to the hydraulic tank 12 through the pipeline, and the two-position four-way solenoid valve 13 and the hydraulic tank 12 are installed in the central cylinder 6 , the command receiving device 8, the switch detection and signal transmitting device 9, and the first electrode 11 are installed in the central cylinder 6, the command receiving device 8, the switch detection and signal transmitting device 9 are installed in the cavity 7, and the cavity 7 For sealing design, the first electrode 11 corresponds to the second electrode 20 on the ground, the ground detector 19 is connected with the command receiving device 8, switch detection and signal transmitting device 9 in the intelligent sliding sleeve 22, and the ground detector 19 The electromagnetic wave information transmission system is used for information transmission, and the intelligent sliding sleeve 22 is installed in the positioning tube 21 .

The working principle of the present invention: the ground detector 19 sends a command to open the sliding sleeve 2, and the opening command is transmitted to the downhole intelligent sliding sleeve device through the formation information transmission channel composed of the positioning pipe 21 and the formation, and the command in the intelligent sliding sleeve device receives The device 8 outputs a control signal after receiving the opening command to make the two-position four-way solenoid valve 13 act, open the first hydraulic pipe 16 and the second hydraulic pipe 17, and the liquid in the hydraulic tank 12 enters the upper chamber 3, thereby driving the sliding valve. The sleeve 2 moves downward, and when the sliding sleeve 2 goes down to fully open the fracturing port 18, the switch detection and signal emission device 9 monitors the sliding displacement of the sliding sleeve 2 in real time, and the detection result is transmitted to the ground detector through the formation information transmission channel 19; If the sliding sleeve 2 of this stage needs to be closed after the fracturing is completed, the ground detector 19 sends a closing command for the sliding sleeve 2, and the closing command is transmitted to the downhole intelligent sliding sleeve 22 through the formation information transmission channel, and the intelligent sliding sleeve 22 The command receiving device 8 in the center outputs a control signal after receiving the closing command, so that the two-position four-way solenoid valve 13 acts, closes the first hydraulic pipe 16 and the second hydraulic pipe 17, and simultaneously opens the third hydraulic pipe 14 and the fourth hydraulic pipe. The liquid in the pipe 15 and the hydraulic tank 12 enters the lower chamber 4, thereby driving the sliding sleeve 2 to move upwards, thereby closing the fracturing port 18, and the switch detection and signal emitting device 9 records the sliding displacement of the sliding sleeve 2 in real time, thereby ensuring The frac port 18 is fully closed.

The above are preferred embodiments of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principle and spirit of the present invention, the changes, modifications, Alternatives and modifications still fall within the protection scope of the present invention.

Claims (4)

1. a kind of unlimited level intelligence sliding bush apparatus of horizontal well, including upper shell (1), central cylinder (6), lower shell (10), sliding sleeve (2), two-position four-way solenoid valve (13), order reception device (8), switch detection and sender unit (9), ground-based detector (19), first electrode (11), it is characterised in that the upper shell (1) and lower shell (10) are welded in central cylinder (6), Upper shell (1), central cylinder (6), lower shell (10) intercommunication, the upper end of central cylinder (6) offer pressure break port (18), sliding sleeve (2) be arranged on central cylinder (6) in inner chamber (5) in, sliding sleeve (2) can move up and down along inner chamber (5), sliding sleeve (2) with it is interior Chamber (5) forms chamber, and chamber is made up of upper chamber (3) and lower chambers (4), and projection is welded with the outer wall of the sliding sleeve (2), convex Rise and split chamber, the upper end of the upper chamber (3) is provided with the first hydraulic tube (16), the second hydraulic tube (17), lower chambers (4) lower end is provided with the 3rd hydraulic tube (14), the 4th hydraulic tube (15), the first hydraulic tube (16), the second hydraulic tube (17), the 3rd Hydraulic tube (14), the 4th hydraulic tube (15) are connected with two-position four-way solenoid valve (13), and two-position four-way solenoid valve (13) passes through pipe Line is connected with hydraulic tank (12), and two-position four-way solenoid valve (13) and hydraulic tank (12) are installed in central cylinder (6), the life Reception device (8), switch detection and sender unit (9), first electrode (11) is made to be arranged in central cylinder (6), order Reception device (8), switch detection and sender unit (9) are arranged in cavity (7), and cavity (7) is Seal Design, and described the One electrode (11) is corresponding with the second electrode (20) on ground, and ground-based detector (19) connects with the order in intelligent sliding sleeve (22) Receiving apparatus (8), switch detection and sender unit (9) connection, ground-based detector (19) use electromagnetic wave information Transmission system Information transfer is carried out, intelligent sliding sleeve (22) is arranged in positioning pipe (21).

A kind of 2. unlimited level intelligence sliding bush apparatus of horizontal well according to claim 1, it is characterised in that the upper shell (1) internal thread is provided with, lower shell (10) is provided with external screw thread.

A kind of 3. unlimited level intelligence sliding bush apparatus of horizontal well according to claim 1, it is characterised in that the sliding sleeve (2) Outer surface be enclosed with sealing ring.

A kind of 4. unlimited level intelligence sliding bush apparatus of horizontal well according to claim 1, it is characterised in that the central cylinder (6) battery, battery and order reception device (8), switch detection and sender unit (9), two-position four-way are additionally provided with Magnetic valve (13) is electrically connected with.