CN219387858U

CN219387858U - Novel coalbed methane branch well structure

Info

Publication number: CN219387858U
Application number: CN202320622003.3U
Authority: CN
Inventors: 贾昆鹏; 高泉; 万志南
Original assignee: Xi'an Xianghong Energy Technology Co ltd
Current assignee: Xi'an Xianghong Energy Technology Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-07-21
Anticipated expiration: 2033-03-27

Abstract

The utility model relates to the technical field of horizontal well equipment and discloses a novel coalbed methane branch well structure, which comprises a main shaft, wherein a first well wall protection cover is fixedly arranged on the outer side wall of the main shaft, a second well wall protection cover is fixedly arranged on the outer wall of an extension cylinder of the main shaft, an air pump is fixedly arranged at the top of the inside of the main shaft, an air collection tank is fixedly arranged on one side of the air pump, and an observation window is fixedly arranged in the middle of the front end face of the air collection tank. According to the novel coalbed methane branch well structure, the first well wall protection cover is arranged on the outer wall of the main well barrel, and the second well wall protection cover is arranged on the outer wall of the extension barrel, so that the outer side of the well wall can be protected from being damaged to a great extent, the service life of a well barrel of the novel coalbed methane branch well structure is shortened due to the fact that the well wall is corroded in a wet condition under the ground for a long time, the practicability of the equipment is improved, and the service life of the equipment is prolonged.

Description

Novel coalbed methane branch well structure

Technical Field

The utility model relates to the technical field of horizontal well equipment, in particular to a novel coalbed methane branch well structure.

Background

A horizontal well, with a well inclination angle of at or near 90 °, has a well bore along the horizontal direction for a length of well. As shown in the drawings, the wellbore extends horizontally a substantial length in the reservoir. Sometimes, the kick angle may exceed 90 degrees, the "kick-up" for a particular need. Generally, horizontal wells are suitable for thin hydrocarbon reservoirs or fractured hydrocarbon reservoirs, and aim to increase the exposed area of the hydrocarbon reservoirs, wherein coal bed gas is hydrocarbon gas stored in coal beds, which mainly contains methane and is adsorbed on the surfaces of coal matrix particles, partially free in coal pores or dissolved in coal bed water, is a concomitant mineral resource of coal, belongs to unconventional natural gas, and is a clean and high-quality energy and chemical raw material which rises internationally in recent two decades.

The horizontal well distribution structure in the current stage has a plurality of defects, such as low coal bed gas discharge efficiency, high humidity in the underground for a long time, easy damage to a shaft, low service life and poor control of pressure and humidity in the main shaft.

Accordingly, one skilled in the art would be able to provide a novel coalbed methane lateral well structure to address the problems set forth in the background above.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a novel coalbed methane branch well structure, which can protect the outer side of a well wall from being damaged to a great extent and prevent the service life of a well shaft from being shortened due to long-time corrosion of a wet condition received underground by the aid of the first well wall protection cover arranged on the outer wall of a main well barrel and the second well wall protection cover arranged on the outer wall of an extension barrel, so that the practicability of equipment is improved and the service life of the equipment is prolonged.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the automatic gas collecting device comprises a main shaft, wherein a first well wall protection cover is fixedly arranged on the outer side wall of the main shaft, a second well wall protection cover is fixedly arranged on the outer wall of an extension shaft of the main shaft, a gas sucking pump is fixedly arranged at the top of the inside of the main shaft, and a gas collecting tank is fixedly arranged on one side of the gas sucking pump.

Further, an observation window is fixedly arranged in the middle of the front end face of the gas collection tank, a control panel is fixedly arranged at the bottom of the observation window, a control screen is fixedly arranged on one side of the front end face of the control panel, a plurality of control buttons are fixedly arranged on one side of the control screen, and a gas outlet is fixedly arranged at the bottom of one side of the gas collection tank;

through the technical scheme, the gas outlet can discharge the gas in the gas collection tank for further treatment.

Further, a pressure sensor is fixedly arranged at the bottom of the main shaft, a signal terminal is fixedly arranged at the bottom of the pressure sensor, and a temperature sensor is fixedly arranged at one side of the signal terminal;

through the technical scheme, the temperature sensor can timely transmit the underground temperature real-time condition to hands of staff.

Further, a first filter screen is fixedly arranged on one side of the bottom of the main shaft, and a second filter screen is fixedly arranged on one side of the first filter screen;

through the technical scheme, the second filter screen can adsorb impurities in the gas, so that the collected gas is purer.

Further, a first diversion cylinder is fixedly arranged at one side of the bottom of the main shaft, a second diversion cylinder is fixedly arranged at one side of the first diversion cylinder, and a fourth diversion cylinder is fixedly arranged at one side of the second diversion cylinder;

through the technical scheme, the fourth diversion cylinder can collect and discharge the coal gas in other areas to the main shaft.

Further, a control valve is fixedly arranged at the top of the inside of the main well barrel;

by the technical scheme, the control valve can control the collection switch of the main shaft.

Further, a plurality of support columns are fixedly arranged at the bottom of the gas collection tank;

through the technical scheme, the support column can support the weight of the gas collection tank.

Further, a third diversion cylinder is fixedly arranged on one side of the fourth diversion cylinder;

through the technical scheme, the third diversion cylinder can collect and discharge the coal gas in other areas to the main shaft.

The utility model has the following beneficial effects:

1. according to the novel coalbed methane branch well structure, the first well wall protection cover is arranged on the outer wall of the main well barrel, and the second well wall protection cover is arranged on the outer wall of the extension barrel, so that the outer side of the well wall can be protected from being damaged to a great extent, and the service life of a well barrel is shortened due to the fact that the well wall is corroded in a wet condition under the ground for a long time, so that the practicability of equipment is improved, and the service life of the equipment is prolonged.

2. According to the novel coalbed methane branch well structure, the pressure sensor is arranged at the bottom of the main well barrel, so that pressure signals can be sent to the outside through the pressure sensor, external staff can observe the internal gas pressure at any time, the temperature sensor is arranged at the bottom of the main well barrel, signals can be sent to the outside through the signal terminal, the staff can know the condition of underground humidity at any time, work can be safely carried out, accidents can be prevented, and the safety of equipment is improved.

3. According to the novel coal bed gas branch well structure, the air pump is arranged at the top of the main well barrel, so that the collection speed of coal gas can be accelerated, the equipment can more efficiently complete work, and the working efficiency of staff is improved.

Drawings

FIG. 1 is an elevation view of a novel coalbed methane lateral well structure in accordance with the present utility model;

FIG. 2 is a front view of a gas collection tank of the novel coalbed methane branch well structure;

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

fig. 4 is a partial enlarged view at fig. 1B.

Legend description:

1. a main wellbore; 2. a control valve; 3. a first borehole wall shield; 4. a pressure sensor; 5. a signal terminal; 6. a temperature sensor; 7. a second borehole wall shield; 8. a first split-flow cylinder; 9. a second split-flow cylinder; 10. a third split-flow cylinder; 11. a fourth diverting cylinder; 12. a gas collection tank; 13. an observation window; 14. a support column; 15. a control panel; 16. a control screen; 17. a control button; 18. an air extracting pump; 19. a first filter screen; 20. a second filter screen; 21. and an air outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other examples, which are obtained by persons of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present utility model based on the examples herein, and it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the exemplary embodiments according to the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-4, one embodiment provided by the present utility model is: including main pit shaft 1, the fixed first wall of a well protection casing 3 that is provided with of lateral wall of main pit shaft 1, the fixed second wall of a well protection casing 7 that is provided with of outer wall of extension section of thick bamboo of main pit shaft 1, the fixed aspiration pump 18 that is provided with in top of the inside of main pit shaft 1, the fixed gas collection jar 12 that is provided with in one side of aspiration pump 18.

The middle part of the front end surface of the gas collection tank 12 is fixedly provided with an observation window 13, the bottom of the observation window 13 is fixedly provided with a control panel 15, one side of the front end surface of the control panel 15 is fixedly provided with a control screen 16, one side of the control screen 16 is fixedly provided with a plurality of control buttons 17, the bottom of one side of the gas collection tank 12 is fixedly provided with a gas outlet 21, the gas outlet 21 can discharge the gas in the gas collection tank 12 for further treatment, the bottom of the main shaft 1 is fixedly provided with a pressure sensor 4, the bottom of the pressure sensor 4 is fixedly provided with a signal terminal 5, one side of the signal terminal 5 is fixedly provided with a temperature sensor 6, the temperature sensor 6 can timely transmit the underground temperature to the hands of staff, one side of the bottom of the main shaft 1 is fixedly provided with a first filter screen 19, one side of the first filter screen 19 is fixedly provided with a second filter screen 20, the second filter screen 20 can adsorb the impurity in the coal gas, make the coal gas of collecting purer, the fixed first reposition of redundant personnel section of thick bamboo 8 that is provided with in bottom one side of main pit shaft 1, the fixed second reposition of redundant personnel section of thick bamboo 9 that is provided with in one side of first reposition of redundant personnel section of thick bamboo 8, the fixed fourth reposition of redundant personnel section of thick bamboo 11 that is provided with in one side of second reposition of redundant personnel section of thick bamboo 9, the fourth reposition of redundant personnel section of thick bamboo 11 can collect the coal gas in other areas and send main pit shaft 1, the fixed control valve 2 that is provided with in top of main pit shaft 1, the control valve 2 can control the switch of collecting of main pit shaft 1, the fixed a plurality of support columns 14 that are provided with in bottom of gas collection jar 12, the support column 14 can support the weight of gas collection jar 12, the fixed third reposition of redundant personnel section of thick bamboo 10 is provided with in one side of fourth reposition of redundant personnel section of thick bamboo 11, the third reposition of redundant personnel section of thick bamboo 10 can collect the coal gas in other areas and send main pit shaft 1.

Working principle: according to the utility model, the first well wall protective cover 3 and the second well wall protective cover 7 are arranged on the outer wall of the main well 1, the underground hard substances can be prevented from damaging the well through the protection of the protective covers, the underground humidity is high, the reduction of the service life caused by overlooking the outer wall of the well due to the high humidity can be prevented, the first filter screen 19 and the second filter screen 20 are arranged in the main well 1, impurities in the coal gas can be adsorbed through the two filter screens, the purity of the gas is ensured, the pressure sensor 4 is arranged at the bottom of the main well 1, the staff can know the pressure degree of the coal gas at the bottom at any time, the staff can know the air humidity at the bottom at any time through the temperature sensor 6, the equipment can be controlled to work or shut down through the arrangement of the control valve 2, and then the collection speed of the coal gas can be accelerated through the air pump 18, so that the working efficiency of the staff is improved.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a novel coalbed methane branch well structure, includes main pit shaft (1), its characterized in that: the novel well wall protection device is characterized in that a first well wall protection cover (3) is fixedly arranged on the outer side wall of the main well barrel (1), a second well wall protection cover (7) is fixedly arranged on the outer wall of the extension barrel of the main well barrel (1), an air pump (18) is fixedly arranged at the top of the inside of the main well barrel (1), and an air collection tank (12) is fixedly arranged on one side of the air pump (18).

2. The novel coalbed methane branching well structure of claim 1, and further comprising: the middle part of preceding terminal surface of gas collection jar (12) is fixed and is provided with observation window (13), the bottom of observation window (13) is fixed and is provided with control panel (15), one side of the preceding terminal surface of control panel (15) is fixed and is provided with control screen (16), one side of control screen (16) is fixed and is provided with a plurality of control buttons (17), the bottom of one side of gas collection jar (12) is fixed and is provided with gas outlet (21).

3. The novel coalbed methane branching well structure of claim 1, and further comprising: the bottom of main well section of thick bamboo (1) is fixed and is provided with pressure sensor (4), the bottom of pressure sensor (4) is fixed and is provided with signal terminal (5), one side of signal terminal (5) is fixed and is provided with temperature sensor (6).

4. The novel coalbed methane branching well structure of claim 1, and further comprising: a first filter screen (19) is fixedly arranged on one side of the bottom of the main well barrel (1), and a second filter screen (20) is fixedly arranged on one side of the first filter screen (19).

5. The novel coalbed methane branching well structure of claim 1, and further comprising: the bottom one side of main shaft section of thick bamboo (1) is fixed and is provided with first reposition of redundant personnel section of thick bamboo (8), one side of first reposition of redundant personnel section of thick bamboo (8) is fixed and is provided with second reposition of redundant personnel section of thick bamboo (9), one side of second reposition of redundant personnel section of thick bamboo (9) is fixed and is provided with fourth reposition of redundant personnel section of thick bamboo (11).

6. The novel coalbed methane branching well structure of claim 1, and further comprising: the top of the inside of the main well barrel (1) is fixedly provided with a control valve (2).

7. The novel coalbed methane branching well structure of claim 1, and further comprising: the bottom of the gas collection tank (12) is fixedly provided with a plurality of support columns (14).

8. The novel coalbed methane branching well structure of claim 5, and further comprising: a third diversion cylinder (10) is fixedly arranged on one side of the fourth diversion cylinder (11).