CN215595557U

CN215595557U - Intelligent electric drive type accurate pressure control production system for gas well exploitation

Info

Publication number: CN215595557U
Application number: CN202122426723.6U
Authority: CN
Inventors: 伍嘉; 张小霞; 孟庆岭; 张瑶
Original assignee: Chengdu Sneiji Petroleum Technology Service Co ltd
Current assignee: Chengdu Sneiji Petroleum Technology Service Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-01-21
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses an intelligent electric drive type accurate pressure control production system for gas well exploitation, which comprises a temporary storage tank (1), a booster pump (2), a tail pipe (4) connected with a sleeve (3) and a return pipe (5) fixedly arranged at the bottom of the horizontal section of the sleeve (3), wherein a pressure sensor (6) and a valve body (7) are fixedly arranged at the bottom of the tail pipe (4), the inner cavity of the valve body (7) is communicated with the tail pipe (4), an air outlet pipe (8) communicated with the inner cavity is fixedly arranged on the side wall of the valve body (7), a pipeline I (9) is connected to the air outlet pipe (8) through a pipe clamp, one port of the booster pump (2) is communicated with the temporary storage tank (1), the other port of the booster pump (2) is connected with a pipeline II (10), and the other port of the pipeline II (10) is connected with the return pipe (5) through a pipe clamp. The utility model has the beneficial effects that: the shale gas mining pressure control device has the advantages of compact structure, accurate control of shale gas mining pressure, guarantee of shale gas mining efficiency and yield, and high automation degree.

Description

Intelligent electric drive type accurate pressure control production system for gas well exploitation

Technical Field

The utility model relates to an intelligent electric drive type accurate pressure control production system for gas well exploitation.

Background

Natural gas, sandstone gas, shale gas and the like are used as high-quality, efficient and clean new energy sources, and are widely distributed in China, large in resource quantity and wide in development and utilization prospect. The shale gas well has high initial yield and fast yield decrease, and how to prolong the initial high yield period and improve the final recovery efficiency is the key work of shale gas benefit development. The shale gas is exploited to realize benefits, a complex fracture network is formed through large-scale hydraulic fracturing, the effective stress around a well is rapidly increased due to overhigh production allocation, the fracture network area is rapidly closed and damaged, the diversion capacity is partially lost, and meanwhile, the decrease of express production decrease and medium and long term accumulative production is caused.

Shale gas mined from the underground is returned to the ground through an underground casing pipe and then conveyed into a designated storage tank, and in order to improve the conveying efficiency and the mining yield of the shale gas, the pressure in the casing pipe needs to be ensured to be always in a stable state. At present, a fixed oil nozzle is connected to the tail end opening of a sleeve to control pressure for production, and although the fixed nozzle can control pressure, the pressure difference of the fixed nozzle is large in change, and the pressure of a gas well cannot be accurately controlled. Therefore, an electrically driven type pressure-controlled production system with high accuracy for controlling the exploitation pressure of shale gas and ensuring the exploitation efficiency and yield of shale gas is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the intelligent electric-drive type accurate pressure control production system for gas well exploitation, which has the advantages of compact structure, accurate control of shale gas exploitation pressure, guarantee of shale gas exploitation efficiency and yield and high automation degree.

The purpose of the utility model is realized by the following technical scheme: an intelligent electric drive type accurate pressure control production system for gas well exploitation comprises a temporary storage tank, a booster pump, a tail pipe connected with a sleeve and a return pipe fixedly arranged at the bottom of the horizontal section of the sleeve, wherein the return pipe is communicated with the sleeve and forms an included angle with the sleeve; the bottom of the inner cavity of the valve body is sealed, an electric cylinder is fixedly arranged at the bottom of the sealed end, a piston rod of the electric cylinder extends into the inner cavity, a valve core is fixedly arranged on the action end of the piston rod, the valve core is in sliding fit with the inner cavity, an output interface of the pressure sensor is connected with an input interface of the controller through a signal line, and the controller is further connected with the electric cylinder.

The production system also comprises a threaded sleeve, and the right port of the sleeve and the left port of the tail pipe are both in threaded connection with the threaded sleeve.

And an electromagnetic valve is connected between the booster pump and the temporary storage tank and is connected with the controller.

The valve body is welded on the tail pipe.

The output connector of the pressure sensor is arranged through the bottom wall of the tail pipe.

And a guide post is fixedly arranged on the bottom surface of the valve core and slidably penetrates through the closed end of the valve body.

The horizontal section of the sleeve is arranged on the ground through a supporting seat.

And an air compensating valve is arranged at the top of the temporary storage tank.

The utility model has the following advantages:

1. the exploitation pressure of the shale gas is accurately controlled, and the exploitation efficiency and the yield of the shale gas are ensured.

2. The opening and closing of the valve core is controlled through the controller, meanwhile, the electromagnetic valve, the booster pump and the electric cylinder can be controlled to be opened and closed, meanwhile, the pressure of shale gas can be monitored through the pressure sensor in real time, the purpose of intelligently adjusting the production pressure of a wellhead is achieved, the production pressure is optimized, the production period and the gas yield of the shale gas well can be effectively improved, manual operation and control are not needed, and the working strength of operators is greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is an enlarged view of a portion I of FIG. 1;

FIG. 4 is a schematic diagram of the operation of the casing when the shale gas pressure is too high;

in the figure, 1-temporary storage tank, 2-booster pump, 3-sleeve, 4-tail pipe, 5-return pipe, 6-pressure sensor, 7-valve body, 8-air outlet pipe, 9-pipeline I, 10-pipeline II, 11-electric cylinder, 12-valve core, 13-thread sleeve, 14-electromagnetic valve, 15-guide column and 16-air make-up valve.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, without limiting the scope of the utility model to the following:

as shown in figures 1-3, an intelligent electric-drive type precise pressure control production system for gas well exploitation comprises a temporary storage tank 1, a booster pump 2, a tail pipe 4 connected with a casing 3, a return pipe 5 fixedly arranged at the bottom of the horizontal section of the casing 3, the reflux pipe 5 is communicated with the sleeve 3 and forms an included angle with the sleeve 3, a pressure sensor 6 and a valve body 7 are fixedly arranged at the bottom of the tail pipe 4, the output connector of the pressure sensor 6 is arranged by penetrating the bottom wall of the tail pipe 4, the valve body 7 is welded on the tail pipe 4, the inner cavity of the valve body 7 is communicated with the tail pipe 4, the side wall of the valve body 7 is fixedly provided with an air outlet pipe 8 communicated with the inner cavity, the air outlet pipe 8 is connected with a pipeline I9 through a pipe clamp, the pipeline I9 is communicated with the temporary storage tank 1, one port of the booster pump 2 is communicated with the temporary storage tank 1, the other port of the booster pump 2 is connected with a pipeline II10, and the other port of the pipeline II10 is connected with a return pipe 5 through a pipe joint; the bottom of the inner cavity of the valve body 7 is sealed, the bottom of the sealed end is fixedly provided with an electric cylinder 11, a piston rod of the electric cylinder 11 extends into the inner cavity, a valve core 12 is fixedly arranged on the action end of the piston rod, the valve core 12 is in sliding fit with the inner cavity, the output interface of the pressure sensor 6 is connected with the input interface of the controller through a signal line, and the controller is further connected with the electric cylinder 11.

The production system also comprises a threaded sleeve 13, wherein the right port of the casing 3 and the left port of the tail pipe 4 are both connected to the threaded sleeve 13 in a threaded manner, and when the casing or the tail pipe 4 is damaged, the threaded sleeve 13 can be detached to replace the tail pipe 4. And an electromagnetic valve 14 is connected between the booster pump 2 and the temporary storage tank 1, and the electromagnetic valve 14 is connected with a controller. And a guide post 15 is fixedly arranged on the bottom surface of the valve core 12, and the guide post 15 is arranged by sliding to penetrate through the closed end of the valve body 7. The horizontal section of the sleeve 3 is arranged on the ground through a supporting seat. And an air compensating valve 16 is arranged at the top of the temporary storage tank 1.

The working process of the utility model is as follows:

opening an air compensating valve 16, compensating a certain amount of shale gas into the temporary storage tank 1, and closing the air compensating valve 16 after compensation; setting a shale gas conveying pressure value in the casing 3 on a controller; the vertical section of the casing 3 is lowered into a gas well, shale gas in the gas well sequentially passes through the vertical section of the casing 3, the horizontal section of the casing 3 and the tail pipe 4 and finally enters a designated tank body, wherein the conveying direction of the shale gas is shown as an arrow in figure 1; in the conveying process, the pressure sensor 6 detects the pressure value of the shale gas in real time, converts the pressure signal into an electric signal, then the electric signal is transmitted to a controller, the controller compares the electric signal with a set pressure value after receiving the electric signal, if the detected shale gas pressure value is smaller than the set pressure value, the pressure in the casing 3 is insufficient, at this time, the controller controls the electromagnetic valve 14 and the booster pump 2 to start, the booster pump 2 pumps out the shale gas in the temporary storage tank 1, the pumped shale gas is pressurized by the booster pump 2 and then enters the casing 3 through the pipeline II10 and the return pipe 5 in sequence, so as to increase the pressure in the casing 3, further increasing the shale gas yield pressure in the casing 3 until the detected shale gas yield pressure value is equal to the set pressure value, the controller controls the solenoid valve 14 and the booster pump 2 to be closed, thereby ensuring shale gas exploitation efficiency and yield.

If the detected shale gas pressure value is larger than the set pressure value, the pressure in the casing 3 is overlarge, and potential safety hazards exist, at the moment, the controller controls the piston rod of the electric cylinder 11 to retract downwards, the piston rod drives the valve core 12 to move downwards, the air outlet pipe 8 is communicated with the cavity body, as shown in the figure 4, at the moment, a part of shale gas in the tail pipe 4 sequentially passes through the inner cavity of the valve body 7, the air outlet pipe 8 and the pipeline I9 and finally enters the temporary storage tank 1, so that the aim of reducing the pressure of the shale gas is achieved, until the detected shale gas pressure value is equal to the set pressure value, the controller controls the piston rod of the electric cylinder 11 to extend upwards, the piston rod drives the valve core 12 to move upwards, the valve core 12 blocks the air outlet pipe 8, and accordingly the shale gas mining efficiency and yield are ensured.

Therefore, the production control system ensures the stability of the pressure in the casing 3, realizes the accurate control of the exploitation pressure of the shale gas and ensures the exploitation efficiency and yield of the shale gas. Meanwhile, potential safety hazards caused by overhigh pressure of shale gas in the sleeve 3 are avoided, and the safety and reliability of the sleeve are achieved. In addition, this production system passes through opening and close of controller control case 12, can also control opening and close of solenoid valve 14, booster pump 2 and electric cylinder 11 simultaneously, can also reach the purpose of intelligent regulation shale gas pressure through the real-time monitoring well head production pressure of pressure sensor 6 simultaneously, optimizes the production pressure, can effectively improve shale gas well production cycle and gas production, and does not need artificial going to control, very big reduction operating personnel's working strength.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an accurate accuse pressure production system of intelligence electricity driving formula for gas well exploitation which characterized in that: it comprises a temporary storage tank (1), a booster pump (2), a tail pipe (4) connected with a casing pipe (3), a return pipe (5) fixedly arranged at the bottom of the horizontal section of the casing pipe (3), the return pipe (5) is communicated with the sleeve (3) and arranged at an included angle with the sleeve (3), a pressure sensor (6) and a valve body (7) are fixedly arranged at the bottom of the tail pipe (4), the inner cavity of the valve body (7) is communicated with the tail pipe (4), an air outlet pipe (8) communicated with the inner cavity is fixedly arranged on the side wall of the valve body (7), a pipeline I (9) is connected on the air outlet pipe (8) through a pipe clamp, the pipeline I (9) is communicated with the temporary storage tank (1), one port of the booster pump (2) is communicated with the temporary storage tank (1), the other port of the booster pump (2) is connected with a pipeline II (10), and the other port of the pipeline II (10) is connected with a return pipe (5) through a pipe joint; the bottom of the inner cavity of the valve body (7) is sealed, the bottom of the sealed end is fixedly provided with an electric cylinder (11), a piston rod of the electric cylinder (11) extends into the inner cavity, a valve core (12) is fixedly arranged on the acting end of the piston rod, the valve core (12) is in sliding fit with the inner cavity, an output interface of the pressure sensor (6) is connected with an input interface of the controller through a signal line, and the controller is further connected with the electric cylinder (11).

2. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: the production system also comprises a threaded sleeve (13), and the right port of the casing (3) and the left port of the tail pipe (4) are both connected to the threaded sleeve (13) in a threaded mode.

3. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: and an electromagnetic valve (14) is connected between the booster pump (2) and the temporary storage tank (1), and the electromagnetic valve (14) is connected with a controller.

4. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: the valve body (7) is welded on the tail pipe (4).

5. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: the output connector of the pressure sensor (6) penetrates through the bottom wall of the tail pipe (4).

6. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: the bottom surface of the valve core (12) is fixedly provided with a guide post (15), and the guide post (15) penetrates through the closed end of the valve body (7) in a sliding manner.

7. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: the horizontal section of the sleeve (3) is arranged on the ground through a supporting seat.

8. The intelligent electric drive type precise pressure control production system for gas well exploitation according to claim 1, wherein: and an air compensating valve (16) is arranged at the top of the temporary storage tank (1).