CN212249972U

CN212249972U - Ground well drilling well body structure for gas extraction

Info

Publication number: CN212249972U
Application number: CN202020803875.6U
Authority: CN
Inventors: 赵有州; 杨锐; 周阳
Original assignee: Guizhou Water Mine Aoruian Clean Energy Co ltd
Current assignee: Guizhou Water Mine Aoruian Clean Energy Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-12-29
Anticipated expiration: 2030-05-14

Abstract

The utility model relates to a gas is taken out and is adopted well drilling technical field, specifically is a ground well drilling well body structure for gas is taken out and adopt, including well body mechanism, the inner wall fixedly connected with reinforcing mechanism of well body mechanism, it has the drinking-water pipe to peg graft in reinforcing mechanism's inside, the one end fixedly connected with water pump of drinking-water pipe, well body mechanism is including opening screen pipe, first sleeve, well casing, second sleeve, closing cap, hole groove and exhaust tube. This a ground well drilling well body structure for gas drainage, the inner wall of screen pipe and well casing is consolidated to the outer loop of reinforcing mechanism, the hardness of opening screen pipe and well casing is improved, thereby avoid opening screen pipe and well casing atress deformation or cracked problem, the fastness of well body has been improved, through setting up inner ring and bracing piece, the fastness of outer loop has not only been improved, and the inner ring is spacing to the drinking-water pipe in addition, avoid the drinking-water pipe to make a round trip to rock and cracked problem in the well under operating condition, and is rational in infrastructure, and simple installation, and the practicality is improved.

Description

Ground well drilling well body structure for gas extraction

Technical Field

The utility model relates to a gas drainage well drilling technical field specifically is a ground well drilling shaft structure for gas drainage.

Background

The main component of coal mine gas is CH4 (methane), which is a clean and high-efficiency energy source associated with coal. In a goaf formed after coal mining, a large amount of gas still exists, and can be continuously extracted and utilized. Since the density of CH4 (methane) is lower than that of air, the CH4 (methane) is preferentially accumulated in a fracture zone of a roof and the upper part of a goaf generally, compared with underground extraction, extraction by a ground drilling mode has the advantages of high extraction concentration, simplicity and convenience in utilization, low cost and the like, and is a new field with a wide development prospect. Related industries are formed in British, Germany and America, China is still in the stage of starting and exploring, and key laboratories in China for coal and coal bed gas co-mining are developing related technologies.

The drainage and gas collection integrated goaf gas extraction well body structure disclosed in the Chinese patent CN207048740U avoids the separate construction of a water extraction well and a gas extraction well, achieves the effect of two well types by using one well type, saves the drilling and operation maintenance cost, can effectively seal the water-bearing layer above the goaf fracture zone, avoids the water-bearing stratum on the goaf from flowing into the goaf by water burst, can solve the problem of hole collapse and blockage caused by the collapse and accumulation of falling gravels in the goaf, keeps the well shaft stable, realizes the continuous and effective communication of the well shaft, the fracture zone and the goaf space, utilizes negative pressure equipment on the ground to extract gas accumulated in the goaf while drainage pump is arranged in the well shaft for drainage, realizes gas-water separation and gas-water co-mining, but, the drainage and gas-extraction integrated goaf gas extraction well body structure, while solving the problems, the following disadvantages are provided:

according to the drainage and gas production integrated goaf gas extraction well body structure, due to the large amount of mining and accumulated water extraction of a coal mine, the rock stratum deformation amount is large, the deformation speed is high, the bending stress is large, and the part of the three-opening screen pipe for drilling cannot adapt to the changes and deform or break.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a ground well drilling well body structure for gas drainage through setting up strengthening mechanism, consolidates the well body, has solved the problem of proposing among the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a ground well drilling well body structure for gas extraction comprises a well body mechanism, wherein a reinforcing mechanism is fixedly connected to the inner wall of the well body mechanism, a water pumping pipe is inserted into the reinforcing mechanism in an inserting mode, and one end of the water pumping pipe is fixedly connected with a water pump;

the well body mechanism comprises an opening sieve tube, a first sleeve, a well pipe, a second sleeve, a sealing cover, a hole groove and an exhaust tube, wherein one end of the opening sieve tube is fixedly connected with the first sleeve, the opening sieve tube is in threaded connection with the well pipe through the first sleeve arranged at one end of the opening sieve tube, one end of the well pipe far away from the first sleeve is fixedly connected with the second sleeve, the well pipe is in threaded connection with the sealing cover through the second sleeve arranged at one end of the well pipe, the hole groove is formed in the axis of the sealing cover, and one side of the sealing cover is fixedly connected with the exhaust tube;

the reinforcing mechanism comprises an inner ring, a supporting rod and an outer ring, the supporting rod is fixedly connected to the outer surface of the inner ring, and the outer ring is fixedly connected to one end, far away from the inner ring, of the supporting rod.

Optionally, the outer surfaces of the first sleeve, the second sleeve and the sealing cover are fixedly connected with a bump.

Optionally, the inner walls of the sieve tube and the well tube are fixedly connected with a reinforcing mechanism, and the inner walls of the sieve tube and the well tube are fixedly connected with the outer surface of the outer ring.

Optionally, the number of the supporting rods is multiple, and the supporting rods are uniformly distributed on the outer surface of the inner ring.

Optionally, the inner ring and the outer ring are concentric circles.

Optionally, the closing cap is inserted with the drinking-water pipe through the hole groove that sets up in its axle center department, the drinking-water pipe is inserted with the inner wall of surface and inner ring.

(III) advantageous effects

The utility model provides a ground well drilling well body structure for gas drainage possesses following beneficial effect:

1. this a ground well drilling well body structure for gas drainage, through setting up reinforcing mechanism, reinforcing mechanism's outer loop is consolidated the inner wall of opening screen pipe and well casing, improves the hardness of opening screen pipe and well casing to avoid opening screen pipe and well casing atress deformation or cracked problem, improved the fastness of well body.

2. This a ground well drilling shaft structure for gas drainage through setting up inner ring and bracing piece, inner ring and bracing piece have not only improved the fastness of outer loop, peg graft the drinking-water pipe in the inside of inner ring in addition, can carry on spacingly to the drinking-water pipe, avoid the drinking-water pipe to make a round trip to rock and cracked problem in the well under operating condition, rational in infrastructure, the simple installation has improved the practicality.

Drawings

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

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic structural view of the well mechanism of the present invention;

fig. 4 is a schematic structural diagram of the reinforcing mechanism of the present invention.

In the figure: 1-well body mechanism, 101-screen opening, 102-first sleeve, 103-well pipe, 104-second sleeve, 105-sealing cover, 106-hole groove, 107-exhaust pipe, 2-reinforcing mechanism, 201-inner ring, 202-support rod, 203-outer ring, 3-exhaust pipe, 4-water pump and 5-lug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 4, the present invention provides a technical solution: a ground well drilling well body structure for gas extraction comprises a well body mechanism 1, wherein a reinforcing mechanism 2 is fixedly connected to the inner wall of the well body mechanism 1, a water pumping pipe 3 is inserted into the reinforcing mechanism 2, one end of the water pumping pipe 3 is fixedly connected with a water pump 4, and accumulated water at the bottom of a well is pumped out through the water pumping pipe 3 by the water pump 4;

the well body mechanism 1 comprises a sieve opening pipe 101, a first sleeve 102, a well pipe 103, a second sleeve 104, a sealing cover 105, a hole groove 106 and an exhaust pipe 107, wherein one end of the sieve opening pipe 101 is fixedly connected with the first sleeve 102, the sieve opening pipe 101 is in threaded connection with the well pipe 103 through the first sleeve 102 arranged at one end of the sieve opening pipe, threads are arranged in the first sleeve 102, threads are arranged on the outer surface of one end of the well pipe 103, so that the inner wall of the first sleeve 102 is in threaded connection with one end of the well pipe 103 with the threads, one end of the well pipe 103 far away from the first sleeve 102 is fixedly connected with the second sleeve 104, the well pipe 103 is in threaded connection with the sealing cover 105 through the second sleeve 104 arranged at one end of the well pipe 103, threads are arranged in the second sleeve 104, the outer surface of one end of the sealing cover 105 is provided with the threads, the hole groove 106 is arranged at the axial center of the sealing, an exhaust pipe 107 is fixedly connected to one side of the sealing cover 105, one end of the exhaust pipe 107 penetrates into the sealing cover 105, and a gas pump is fixedly connected to the outer end of the exhaust pipe 107, so that the gas pump 107 can exhaust gas in the well through the exhaust pipe 107;

the reinforcing mechanism 2 comprises an inner ring 201, a supporting rod 202 and an outer ring 203, the supporting rod 202 is fixedly connected to the outer surface of the inner ring 201, the outer ring 203 is fixedly connected to one end, far away from the inner ring 201, of the supporting rod 202, and the outer ring 203 is used for reinforcing the inner walls of the sieve tube 101 and the well pipe 103 and improving the hardness of the sieve tube 101 and the well pipe 103, so that the problem that the sieve tube 101 and the well pipe 103 deform or break under stress is solved.

The outer surfaces of the first sleeve 102, the second sleeve 104 and the sealing cover 105 are fixedly connected with the convex blocks 5, so that the well pipe 103 is conveniently connected to the sieve-opening pipe 101 in a threaded manner or the sealing cover 105 is connected to the well pipe 103 in a threaded manner or the sieve-opening pipe 101 or the well pipe 103 is clamped with the drilling machinery through the convex blocks 5, so that the sieve-opening pipe 101 or the well pipe 103 is fixed, when the well pipe 103 is connected to the sieve-opening pipe 101 in a threaded manner, the problem of rotation of the sieve-opening pipe 101 is avoided, or when the sealing cover 105 is connected to the well pipe 103 in a threaded manner, the problem of rotation of the well pipe 103 is avoided, the reinforcing mechanisms 2 are fixedly connected to the inner walls of the sieve-opening pipe 101 and the well pipe 103, as the depth of a well gradually increases, the distance between two adjacent reinforcing mechanisms 2 gradually decreases, the inner walls of the sieve-opening pipe 101 and the well pipe 103 are fixedly connected to the outer surface of the outer ring 203, inner ring 201 and outer ring 203 are concentric circles, and closing cap 105 pegs graft with drinking-water pipe 3 through setting up hole groove 106 in its axle center department, and closing cap 105 is provided with sealed the pad with the seam crossing of drinking-water pipe 3, avoids gas to distribute out from the seam crossing of closing cap 105 with drinking-water pipe 3, and drinking-water pipe 3 pegs graft with the inner wall of inner ring 201 with the surface, pegs graft through making drinking-water pipe 3 and inner ring 201, reaches the purpose of fixed drinking-water pipe 3, avoids the problem that drinking-water pipe 3 rocked back and forth in the well.

When the well is used, the outer end of the extraction pipe 107 is fixedly connected with a gas pump, so that the gas pump 107 pumps gas in the well body through the extraction pipe 107, the water pump 4 pumps accumulated water at the bottom of the well through the extraction pipe 3, the outer ring 203 reinforces the inner walls of the sieve tube 101 and the well pipe 103, the hardness of the sieve tube 101 and the well pipe 103 is improved, and the problem that the sieve tube 101 and the well pipe 103 deform or break under stress is avoided.

To sum up, this a ground well drilling well body structure for gas drainage, during the use, through setting up reinforcing mechanism 2, the outer loop 203 of reinforcing mechanism 2 reinforces the inner wall of opening screen pipe 101 and well casing 103, improve the hardness of opening screen pipe 101 and well casing 103, thereby avoid opening the problem that screen pipe 101 and well casing 103 atress warp or fracture, the fastness of well body has been improved, through setting up inner ring 201 and bracing piece 202, inner ring 201 and bracing piece 202 have not only improved the fastness of outer loop 203, and peg graft the inside of inner ring 203 with drinking-water pipe 3, can carry on spacingly to drinking-water pipe 3, avoid drinking-water pipe 3 to make a round trip to rock and the cracked problem in the well under operating condition, and is rational in infrastructure, and simple installation, and the practicality is improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a ground well drilling well bore structure for gas drainage, includes well bore mechanism (1), its characterized in that: the inner wall of the well body mechanism (1) is fixedly connected with a reinforcing mechanism (2), a water pumping pipe (3) is inserted into the reinforcing mechanism (2), and one end of the water pumping pipe (3) is fixedly connected with a water pump (4);

the well body mechanism (1) comprises an open sieve tube (101), a first sleeve (102), a well pipe (103), a second sleeve (104), a sealing cover (105), a hole groove (106) and an exhaust pipe (107), wherein one end of the open sieve tube (101) is fixedly connected with the first sleeve (102), the open sieve tube (101) is in threaded connection with the well pipe (103) through the first sleeve (102) arranged at one end of the open sieve tube, one end, far away from the first sleeve (102), of the well pipe (103) is fixedly connected with the second sleeve (104), the well pipe (103) is in threaded connection with the sealing cover (105) through the second sleeve (104) arranged at one end of the well pipe, the hole groove (106) is formed in the axis of the sealing cover (105), and the exhaust pipe (107) is fixedly connected to one side of the sealing cover (105);

the reinforcing mechanism (2) comprises an inner ring (201), a supporting rod (202) and an outer ring (203), the supporting rod (202) is fixedly connected to the outer surface of the inner ring (201), and the outer ring (203) is fixedly connected to one end, far away from the inner ring (201), of the supporting rod (202).

2. The ground drilling well bore structure for gas extraction according to claim 1, characterized in that: the outer surfaces of the first sleeve (102), the second sleeve (104) and the sealing cover (105) are fixedly connected with a lug (5).

3. The ground drilling well bore structure for gas extraction according to claim 1, characterized in that: the inner walls of the sieve tube (101) and the well tube (103) are fixedly connected with a reinforcing mechanism (2), and the inner walls of the sieve tube (101) and the well tube (103) are fixedly connected with the outer surface of the outer ring (203).

4. The ground drilling well bore structure for gas extraction according to claim 1, characterized in that: the number of the supporting rods (202) is multiple, and the supporting rods (202) are uniformly distributed on the outer surface of the inner ring (201).

5. The ground drilling well bore structure for gas extraction according to claim 1, characterized in that: the inner ring (201) and the outer ring (203) are concentric circles.

6. The ground drilling well bore structure for gas extraction according to claim 1, characterized in that: the sealing cover (105) is connected with the water pumping pipe (3) in an inserting mode through a hole groove (106) formed in the axis of the sealing cover, and the water pumping pipe (3) is connected with the outer surface of the inner wall of the inner ring (201) in an inserting mode.