Complex stratum gas storage well positive circulation well cementation device

Abstract

The utility model relates to the technical field of complex stratum gas storage well positive circulation well cementation devices, and discloses a complex stratum gas storage well positive circulation well cementation device which comprises a main body mechanism, a fixing mechanism is arranged at the top of the main body mechanism, a connecting mechanism is arranged at the bottom of the main body mechanism, and the main body mechanism comprises a pipeline. A telescopic pipeline is slidably connected into the pipeline, a connecting column is fixedly connected to the surface of the telescopic pipeline, and an elastic column is fixedly connected to the end, away from the telescopic pipeline, of the connecting column. According to the well cementation device, the telescopic pipeline moves downwards by controlling the lifting platform on the well cementation device, the connecting column can move downwards through the downward movement of the telescopic pipeline, the elastic column can move downwards through the downward movement of the connecting column, and at the moment, the supporting rod slides on the inner wall of a pipeline; and cement-adhered residues on the inner wall of the pipeline are scraped into the sleeve and flow out from the discharge hole, so that the surface of the pipeline can be cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of positive circulation cementing devices for gas storage wells in complex formations, in particular to a positive circulation cementing device for gas storage wells in complex formations. Background Art

[0002] The positive circulation cementing device for gas storage wells in complex formations is a device used for cementing natural gas wells under complex geological conditions. In oil and gas production, cementing refers to the process of reinforcing the well wall by injecting cement slurry or other materials into the wellbore after drilling to prevent leakage of groundwater or formation gas, and at the same time stabilize the wellbore structure to ensure safe production. Gas storage wells in complex formations usually refer to natural gas wells with complex geological conditions, poor well wall stability, high pressure and high temperature, toxic gases such as hydrogen sulfide, and flammable and explosive gases. Cementing operations in such underground environments require special equipment and technology to ensure cementing effects and operational safety. Its working principle is to transport cement slurry or other cementing materials from the ground to the bottom of the well through a mud circulation system, and then inject the cementing materials into the wellbore through cementing tools at the bottom of the well, eventually forming a solidified well wall.

[0003] The existing positive circulation cementing device for gas storage wells in complex formations needs to discharge the material through a pipeline when transferring cement and liquid to the inside of the well wall in order to fill the well wall. When filling the well wall, a large amount of cement liquid will remain on the surface of the pipeline, which is not easy to clean and affects the use. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a positive circulation cementing device for a gas storage well in a complex formation.

[0005] The utility model is implemented by the following technical solutions: a positive circulation cementing device for a gas storage well in a complex formation, comprising a main body mechanism, a fixing mechanism is arranged on the top of the main body mechanism, and a connecting mechanism is arranged on the bottom of the main body mechanism;

[0006] The main body mechanism includes a pipeline, the interior of the pipeline is slidably connected to a telescopic pipeline, a connecting column is fixedly connected to the surface of the telescopic pipeline, an end of the connecting column away from the telescopic pipeline is fixedly connected to an elastic column, an end of the elastic column away from the connecting column is fixedly connected to a support rod, and an end of the support rod away from the elastic column is fixedly connected to a scraper.

[0007] As a further improvement of the above solution, the main body mechanism includes a connecting column, there are two supporting rods, the two connecting columns are symmetrically distributed around the telescopic pipeline, and the scraper contacts the inner wall of the pipeline.

[0008] As a further improvement of the above solution, the main body structure includes an elastic column, which is made of polypropylene and has good elasticity and corrosion resistance and can work stably for a long time in an underground environment.

[0009] Through the above technical solution, the scraper is made of polyurethane, which has good corrosion resistance and wear resistance and is relatively lightweight, which can reduce the weight of the scraper itself and reduce damage to the well wall.

[0010] As a further improvement of the above solution, the fixing mechanism includes a fixing column, the fixing column is fixedly connected to the top of the pipeline, a ventilation hole is opened on the top of the fixing column, and a monitoring device is fixedly connected to the inner wall of the ventilation hole.

[0011] As a further improvement of the above solution, the fixing mechanism includes ventilation holes, and there are two ventilation holes, which are symmetrically distributed with the fixing column as the center.

[0012] Through the above technical solution, the fixing column is fixedly connected to the top of the pipe, and the air outlet of the fixing column is aligned with the middle of the pipe and the ground. When the device is performing an emptying operation, excess gas will flow out from the air outlet.

[0013] As a further improvement of the above solution, the connecting mechanism includes a sleeve, the sleeve is fixedly connected to the bottom of the pipeline, and a discharge port is opened at the bottom of the sleeve.

[0014] As a further improvement of the above solution, a telescopic pipeline is slidably connected inside the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model connects the stirred cement into the telescopic pipeline and connects the telescopic pipeline to the lifting platform on the cementing device, so that the up and down movement of the telescopic pipeline can be controlled, and the telescopic pipeline connected to the material body is moved downward to the inside of the casing, and the cement in the telescopic pipeline will flow out of the telescopic pipeline into the casing and out of the discharge port. Due to the size of the diameter of the discharge port, the cement that does not flow out of the discharge port will enter the pipeline and slowly fill the well wall, and a high-pressure pump connected to the top of the telescopic pipeline will inject the cement into the wellbore through the telescopic pipeline.

[0017] The utility model allows cement to fill the wellbore through the discharge port. At this time, it is necessary to connect a specially prepared liquid to the telescopic pipeline, and the telescopic pipeline is moved downward by controlling the lifting platform on the cementing device. The downward movement of the telescopic pipeline can make the connecting column move downward, and the downward movement of the connecting column can make the elastic column move downward. At this time, the support rod will slide on the inner wall of the pipeline, scrape the residue of cement on the inner wall of the pipeline into the casing, and flow out from the discharge port, so that the surface of the pipeline can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the positive circulation cementing device for a gas storage well in a complex formation of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the connection device of the positive circulation cementing device for a gas storage well in a complex formation of the utility model;

[0020] Figure 3 This is a schematic diagram of the pipeline structure of the positive circulation cementing device for a gas storage well in a complex formation of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the pipeline of the positive circulation cementing device for a gas storage well in a complex formation of the utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the positive circulation cementing device A for a gas storage well in a complex formation according to the utility model.

[0023] Description of main symbols:

[0024] 1. Main body; 101. Pipe; 102. Telescopic pipeline; 103. Connecting column; 104. Elastic column; 105. Support rod; 106. Scraper; 2. Fixing mechanism; 201. Fixing column; 202. Ventilation hole; 203. Monitoring device; 3. Connecting mechanism; 301. Casing; 302. Discharge port. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] Example:

[0027] Please combine Figure 1-5 , a positive circulation cementing device for a gas storage well in a complex formation of this embodiment comprises a main body mechanism 1, a fixing mechanism 2 is arranged on the top of the main body mechanism 1, and a connecting mechanism 3 is arranged on the bottom of the main body mechanism 1;

[0028] The main body 1 includes a pipeline 101, and the pipeline 101 is slidably connected to the telescopic pipeline 102 inside. The surface of the telescopic pipeline 102 is fixedly connected with a connecting column 103, and the end of the connecting column 103 away from the telescopic pipeline 102 is fixedly connected to an elastic column 104, and the end of the elastic column 104 away from the connecting column 103 is fixedly connected to a support rod 105, and the end of the support rod 105 away from the elastic column 104 is fixedly connected to a scraper 106. The main body 1 includes a connecting column 103, and there are two support rods 105. The two connecting columns 103 are symmetrically distributed with the telescopic pipeline 102 as the center. The scraper 106 contacts the inner wall of the pipeline 101. The main body 1 includes an elastic column 104. The elastic column 104 is made of polypropylene and has good elasticity and corrosion resistance. It can work stably for a long time in an underground environment. By connecting the stirred cement into the telescopic pipeline 102 and connecting the telescopic pipeline 102 to the lifting platform on the cementing device, the up and down movement of the telescopic pipeline 102 can be controlled. By connecting the telescopic The pipeline 102 moves downward to the inside of the casing 301. At this time, the cement in the telescopic pipeline 102 will flow out of the telescopic pipeline 102 into the casing 301 and out of the discharge port 302. Due to the size of the diameter of the discharge port 302, the cement that does not flow out of the discharge port 302 will enter the pipeline 101 and slowly fill the well wall. A high-pressure pump is connected to the top of the telescopic pipeline 102 to inject cement into the wellbore through the telescopic pipeline 102, and the cement fills the wellbore through the discharge port 302. At this time, the telescopic pipeline 102 needs to be A specially prepared liquid is connected to the pipeline 102, and the telescopic pipeline 102 is moved downward by controlling the lifting platform on the cementing device. The downward movement of the telescopic pipeline 102 can make the connecting column 103 move downward, and the downward movement of the connecting column 103 can make the elastic column 104 move downward. At this time, the support rod 105 will slide on the inner wall of the pipeline 101, and the cement residue on the inner wall of the pipeline 101 will be scraped into the casing 301 and flow out from the discharge port 302, so that the surface of the pipeline 101 can be cleaned.

[0029] The fixing mechanism 2 includes a fixing column 201, which is fixedly connected to the top of the pipe 101. A ventilation hole 202 is opened on the top of the fixing column 201. A monitoring device 203 is fixedly connected to the inner wall of the ventilation hole 202. The fixing mechanism 2 includes two ventilation holes 202, and the two ventilation holes 202 are symmetrically distributed with the fixing column 201 as the center.

[0030] The connection mechanism 3 includes a sleeve 301 , which is fixedly connected to the bottom of the pipeline 101 , a discharge port 302 is provided at the bottom of the sleeve 301 , and a telescopic pipeline 102 is slidably connected inside the sleeve 301 .

[0031] The implementation principle of a positive circulation cementing device for a gas storage well in a complex formation in the embodiment of the present application is as follows: by connecting the stirred cement into the telescopic pipeline 102, and by connecting the telescopic pipeline 102 to the lifting platform on the cementing device, the up and down movement of the telescopic pipeline 102 can be controlled, and by moving the telescopic pipeline 102 connected to the material body downward to the inside of the casing 301, the cement in the telescopic pipeline 102 will flow out of the telescopic pipeline 102 into the casing 301 and out from the discharge port 302. Due to the size of the diameter of the discharge port 302, the cement that does not flow out of the discharge port 302 will enter the pipeline 101 and slowly fill the well wall, and the telescopic pipeline 10 A high-pressure pump connected to the top injects cement into the wellbore through the telescopic pipeline 102, and the wellbore is filled with cement through the discharge port 302. At this time, it is necessary to connect the telescopic pipeline 102 with a specially prepared liquid, and the telescopic pipeline 102 is moved downward by controlling the lifting platform on the cementing device. The downward movement of the telescopic pipeline 102 can make the connecting column 103 move downward, and the downward movement of the connecting column 103 can make the elastic column 104 move downward. At this time, the support rod 105 will slide on the inner wall of the pipeline 101, and the residue of cement on the inner wall of the pipeline 101 will be scraped into the casing 301 and flow out from the discharge port 302, so that the surface of the pipeline 101 can be cleaned.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A positive circulation cementing device for a gas storage well in a complex formation, characterized in that: It comprises a main body mechanism (1), a fixing mechanism (2) is arranged at the top of the main body mechanism (1), and a connecting mechanism (3) is arranged at the bottom of the main body mechanism (1); The main body mechanism (1) comprises a pipe (101), the interior of the pipe (101) is slidably connected to a telescopic pipeline (102), a connecting column (103) is fixedly connected to the surface of the telescopic pipeline (102), an end of the connecting column (103) away from the telescopic pipeline (102) is fixedly connected to an elastic column (104), an end of the elastic column (104) away from the connecting column (103) is fixedly connected to a support rod (105), and an end of the support rod (105) away from the elastic column (104) is fixedly connected to a scraper (106).

2. A positive circulation cementing device for a gas storage well in a complex formation as claimed in claim 1, characterized in that: The main body structure (1) comprises a connecting column (103), two supporting rods (105), the two connecting columns (103) are symmetrically distributed with the telescopic pipeline (102) as the center, and the scraper (106) contacts the inner wall of the pipeline (101).

3. A positive circulation cementing device for a gas storage well in a complex formation as claimed in claim 1, characterized in that: The main body structure (1) comprises an elastic column (104), and the elastic column (104) is made of polypropylene.

4. A positive circulation cementing device for a gas storage well in a complex formation as claimed in claim 1, characterized in that: The fixing mechanism (2) comprises a fixing column (201), wherein the fixing column (201) is fixedly connected to the top of the pipeline (101), a ventilation hole (202) is provided on the top of the fixing column (201), and a monitoring device (203) is fixedly connected to the inner wall of the ventilation hole (202).

5. A positive circulation cementing device for a gas storage well in a complex formation as claimed in claim 4, characterized in that: The fixing mechanism (2) comprises ventilation holes (202), there are two ventilation holes (202), and the two ventilation holes (202) are symmetrically distributed with the fixing column (201) as the center.

6. The positive circulation cementing device for a gas storage well in a complex formation according to claim 1, characterized in that: The connecting mechanism (3) comprises a sleeve (301), the sleeve (301) is fixedly connected to the bottom of the pipeline (101), and a discharge port (302) is provided at the bottom of the sleeve (301).

7. A positive circulation cementing device for a gas storage well in a complex formation as claimed in claim 6, characterized in that: The sleeve (301) is slidably connected with a telescopic pipeline (102) inside.

Images