阅读说明：本技术 一种天然气开采井封堵装置 (Natural gas exploitation well plugging device ) 是由 张琦 李想 徐东 于 2019-10-18 设计创作，主要内容包括：一种天然气开采井封堵装置,包括封堵盖以及带有压力表的压力测试管,所述压力测试管贯穿所述封堵盖并延伸至所述封堵盖的下方,所述压力测试管的外壁设有管螺纹,所述压力测试管的外壁螺纹连接有气盒；本发明在封堵盖的下方设有气盒,气盒的输出端设有气囊,并且气囊位于配重筒的外侧,当封堵开采井时,将装置放在开采井井口,通过气盒上的单向输气阀充气,使气囊充斥配重筒与开采井壁之间的空间,以达到封堵的目的,密封性好,且本装置结构简单,没有复杂的机械机构,可靠性高；根据压力测试管上的压力表检测井内的压力,在需要时直接将气囊放气即可拆除,拆除过程简单。(A natural gas production well plugging device comprises a plugging cover and a pressure testing pipe with a pressure gauge, wherein the pressure testing pipe penetrates through the plugging cover and extends to the position below the plugging cover, pipe threads are arranged on the outer wall of the pressure testing pipe, and an air box is connected to the outer wall of the pressure testing pipe in a threaded manner; according to the invention, the air box is arranged below the blocking cover, the air bag is arranged at the output end of the air box and is positioned at the outer side of the counterweight cylinder, when a production well is blocked, the device is placed at the wellhead of the production well, and the air bag is inflated through the one-way air delivery valve on the air box, so that the air bag can fill the space between the counterweight cylinder and the wall of the production well, and the purpose of blocking is achieved, the sealing performance is good, and the device has a simple structure, is free from a complex mechanical mechanism and has high reliability; according to the pressure in the manometer detection well on the pressure test pipe, directly deflating the air bag when needed, and the dismantling process is simple.)

1. The natural gas production well plugging device comprises a plugging cover (1) and a pressure testing pipe (2) with a pressure gauge (21), and is characterized in that the pressure testing pipe (2) penetrates through the plugging cover (1) and extends to the lower part of the plugging cover (1), pipe threads are arranged on the outer wall of the pressure testing pipe (2), a gas box (3) is connected to the outer wall of the pressure testing pipe (2) in a threaded manner, the gas box (3) is attached to the lower end face of the plugging cover (1), a counterweight cylinder (5) is arranged below the gas box (3), the counterweight cylinder (5) is in threaded connection with the pressure testing pipe (2), an air bag (4) is arranged on the periphery of the outer side of the counterweight cylinder (5), the air bag (4) is connected to the output end of the gas box (3), a one-way gas conveying valve (31) and a one-way exhaust valve (32) are arranged on the gas box (3), the one-way air delivery valve (31) and the one-way exhaust valve (32) penetrate through the blocking cover (1) and extend to the upper end face of the blocking cover (1).

2. A natural gas production well plugging device according to claim 1, wherein said air bladder (4) is strip-shaped and the cross-sectional area of the bottom end of said air bladder (4) is larger than the cross-sectional area of the top of said air bladder (4).

3. A natural gas production well plugging device according to claim 1, wherein said air bag (4) is fixedly bonded with said counterweight cylinder (5), and a high-density sponge (41) is bonded on one side of said air bag (4) far from said counterweight cylinder (5).

4. A natural gas production well plugging device according to claim 1, wherein said plugging cap (1) is internally provided with an insulating layer (11), and the coverage area of said plugging cap (1) is larger than the diameter of the production well.

5. A natural gas production well plugging device according to claim 1, wherein said gas box (3) has a diameter larger than the diameter of said counterweight cylinder (5) and said gas box (3) has a diameter smaller than the diameter of the production well.

6. A natural gas production well plugging device according to claim 1, wherein the length of said counterweight cylinder (5) is 600 mm and 800mm, and said counterweight cylinder (5) has a cavity therein.

7. A natural gas production well plugging device according to claim 1, wherein said plugging cap (1) is provided with a fixation member (12) at its edge, said fixation member (12) extending through said plugging cap (1) and into the load surface.

8. A natural gas production well plugging device according to claim 1, wherein said plugging cap (1) is provided with two handles (13) at its upper end face.

Technical Field

The invention relates to the field of natural gas exploitation, in particular to a natural gas exploitation well plugging device.

Background

In the natural gas exploitation in-process, a plurality of trial wells are often beaten by exploration personnel so that follow-up essence is exploited and used, and the trial wells often also have the storage of natural gas, need carry out interim shutoff to the trial wells, and current shutoff mode is mostly pour with cement, has not only increased the cost, has lengthened the time limit for a project, and waste time and energy when unsealing moreover, and the practicality is poor, so need a natural gas exploitation well plugging device to solve above-mentioned problem now.

The invention with the application number of CN201821027449.7 discloses a natural gas production well plugging device, which comprises a device main body, wherein a cover plate is welded at the top end of the device main body, a screw is connected to the outer side of the cover plate in a threaded manner, a groove is formed in the center position of the top end of the cover plate, and a pressure test tube is inserted in the center position of the top end of a rotary disc. This novel natural gas exploitation well plugging device, when needs shutoff natural gas well head, put into natural gas well with the device main part, twist and move the screw and will lap and ground chucking, clockwise rotation carousel drives the screw rod and rotates in the pivot, the screw rod rotates and drives the spiro and promote branch and move to the outside, branch moves the outside that promotes first shutoff ring and second shutoff ring to the outside of device main part, can carry out the shutoff with the natural gas exploitation well, but the device structure is complicated, through the mechanical structure transmission, do not use probably to take place the corrosion under the field condition for a long time, cause its transmission reliability to descend.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides a natural gas production well plugging device.

The technical scheme of the invention is as follows: the utility model provides a natural gas exploitation well plugging device, includes the shutoff lid and has the pressure test pipe of manometer, the pressure test pipe runs through the shutoff lid extends to the below of shutoff lid, the outer wall of pressure test pipe is equipped with the pipe thread, the outer wall threaded connection of pressure test pipe has the gas box, the laminating of gas box is in the lower terminal surface of shutoff lid, the below of gas box is equipped with a counter weight section of thick bamboo, a counter weight section of thick bamboo with the pressure test pipe spiro union, outside a week of a counter weight section of thick bamboo is equipped with the gasbag, the gasbag is connected the output of gas box, be equipped with one-way gas transmission valve and one-way discharge valve on the gas box, one-way gas transmission valve and one-way discharge valve all run through the shutoff lid extends to the up end of shutoff lid.

Preferably, the airbag is strip-shaped, and the sectional area of the bottom end of the airbag is larger than that of the top of the airbag.

Preferably, the air bag is fixedly bonded with the counterweight cylinder, and a high-density sponge is bonded on one side of the air bag, which is far away from the counterweight cylinder.

Preferably, the inside of the blocking cover is provided with a heat preservation layer, and the coverage area of the blocking cover is larger than the diameter of the production well.

Preferably, the diameter of the gas box is greater than the diameter of the counterweight barrel, and the diameter of the gas box is less than the diameter of the production well.

Preferably, the length of the counterweight cylinder is 600 mm and 800mm, and a cavity is arranged in the counterweight cylinder.

Preferably, the edge of the blocking cover is provided with a fixing piece, and the fixing piece penetrates through the blocking cover and extends into the load surface.

Preferably, two handles are arranged on the upper end face of the blocking cover.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the air box is arranged below the blocking cover, the air bag is arranged at the output end of the air box and is positioned at the outer side of the counterweight cylinder, when a production well is blocked, the device is placed at the wellhead of the production well, and the air bag is inflated through the one-way air delivery valve on the air box, so that the air bag can fill the space between the counterweight cylinder and the wall of the production well, and the purpose of blocking is achieved, the sealing performance is good, and the device has a simple structure, is free from a complex mechanical mechanism and has high reliability; according to the pressure in the manometer detection well on the pressure test pipe, directly deflating the air bag when needed, and the dismantling process is simple.

Drawings

Fig. 1 is a schematic structural diagram of a natural gas production well plugging device according to an embodiment of the invention;

FIG. 2 is a schematic diagram of the distribution of air cells according to an embodiment of the present invention

FIG. 3 is a schematic top view of a containment cap in accordance with an embodiment of the present invention;

in the above fig. 1-3, 1, a plugging cover; 11. a heat-insulating layer; 12. a fixing member; 13. a handle; 2. a pressure test tube; 21. a pressure gauge; 3. a gas box; 31. a one-way gas delivery valve; 32. a one-way exhaust valve; 4. an air bag; 41. a high density sponge; 5. a counterweight cylinder.

The specific implementation mode is as follows:

the invention is further described below with reference to the accompanying drawings.