Wellhead sealing pressure testing device of grouting well

Abstract

The utility model belongs to the field of pressure testing equipment, and particularly relates to a wellhead sealing pressure testing device of a grouting well, which comprises a drill rod mounted on a drilling machine, an upper sleeve is arranged on the drill rod, the top end of the upper sleeve is in welded sealing connection with the drill rod, an upper flange plate is fixedly mounted on the upper sleeve, a lower sleeve is sleeved on the drill rod, and the lower flange plate is fixedly mounted on the lower sleeve. The lower casing pipe is located below the upper casing pipe, a lower flange and an RJ flange are arranged on the lower casing pipe, the RJ flange is located at the top of the lower flange, a steel pipe is installed on one side of the drill rod, one end of the steel pipe is connected with a water pressing pipeline through a connecting quick connector, a pressure gauge used for pressure monitoring is installed on the top of the steel pipe, and installation holes are formed in the upper flange plate and the lower flange. The pressure test device is reasonable in design, the drilling tool in the well does not need to be lifted out of the well surface in the test process, the pressure test process is easy to operate, and the pressure test device has the advantages of being safe, low in cost, efficient and convenient to test and can meet the technical pressure requirements of related tests.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing equipment, in particular to a pressure testing device for the wellhead sealing of a grouting well. Background Art

[0002] During the construction of a grouting well, according to the technical requirements and specifications, a pressure resistance test must be carried out on the well every 200 m of drilling. The next construction content is determined according to the corresponding pressure requirements. To conduct the pressure resistance test, the wellhead sealing must be ensured.

[0003] In the prior art, each time the pressure is measured, the downhole drill string must be lifted out of the wellhead. After the wellhead is sealed, the corresponding pressure test and pressure resistance test are carried out. This leads to repeated lifting of the drill string during the construction process, resulting in an increase in workload, repeated operation of equipment, and a waste of a large amount of manpower, material resources, and financial resources. Therefore, we propose a pressure testing device for the wellhead sealing of a grouting well to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a pressure testing device for the wellhead sealing of a grouting well.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A pressure testing device for the wellhead sealing of a grouting well, including a drill pipe installed on a drilling rig. An upper casing is provided on the drill pipe. The top end of the upper casing is welded and sealed to the drill pipe, and an upper flange is fixedly installed on the upper casing.

[0007] A lower casing is sleeved on the drill pipe. The lower casing is located below the upper casing. A lower flange and an RJ flange are provided on the lower casing, and the RJ flange is located at the top of the lower flange. A steel pipe is installed on one side of the drill pipe. One end of the steel pipe is connected to a pressure water pipeline through a connecting quick joint, and a pressure gauge for pressure monitoring is installed on the top of the steel pipe.

[0008] Preferably, mounting holes are provided on both the upper flange and the lower flange, bolts are installed in the corresponding mounting holes, and nuts are threadedly sleeved on the bolts.

[0009] Preferably, an external thread is provided on the outer surface of the lower part of the lower casing, and the lower casing can be installed at the wellhead of the grouting well through the external thread on the lower casing.

[0010] Preferably, the bottom end of the drill pipe is connected to the downhole drill string.

[0011] Preferably, a plurality of reinforcement mechanisms for reinforcing the lower casing are provided on the outer side of the lower casing.

[0012] Preferably, the reinforcement mechanism includes a U-shaped seat, a rotating shaft and a rotating rod. The U-shaped seat is fixedly installed on the lower casing. Rotating shafts are rotatably installed on both inner walls of the U-shaped seat, and rotating rods are fixedly installed on the rotating shafts.

[0013] Preferably, a threaded groove is formed at the bottom of the rotating rod, and a support screw is threadedly installed in the threaded groove.

[0014] Preferably, a magnet is fixedly installed on one side of the rotating rod close to the lower casing, and the magnet is fixedly adsorbed to the lower casing.

[0015] Advantages of the present utility model:

[0016] 1. Ensure the safety of the sealing pressure test under the specified technical requirements;

[0017] 2. Low manufacturing cost;

[0018] 3. Easy to use and high efficiency;

[0019] 4. Avoid the large waste of manpower, material resources and financial resources caused by the repetitive and complicated work during the construction process. Description of the drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of a wellhead sealing pressure test device for a grouting well proposed by the present utility model;

[0021] Figure 2 is a partial structural schematic diagram of part A of a wellhead sealing pressure test device for a grouting well proposed by the present utility model;

[0022] Figure 3 is a sectional three-dimensional structural schematic diagram of the reinforcement mechanism of a wellhead sealing pressure test device for a grouting well proposed by the present utility model.

[0023] In the figure: 1, drill pipe; 2, upper casing; 3, upper flange; 4, RJ flange; 5, lower flange; 6, steel pipe; 7, pressure gauge; 8, installation hole; 9, lower casing; 10, reinforcement mechanism; 11, bolt; 12, nut; 13, U-shaped seat; 14, rotating shaft; 15, rotating rod; 16, magnet; 17, threaded groove; 18, support screw. Specific embodiments

[0024] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Reference Figures 1-3 , a pressure test device for the sealing performance of the wellhead of a grouting well, including a drill pipe 1 installed on a drilling rig. More specifically, the bottom end of the drill pipe 1 is connected to the downhole drill tool. An upper casing 2 is provided on the drill pipe 1. The top end of the upper casing 2 is welded and sealed to the drill pipe 1. An upper flange 3 is fixedly installed on the upper casing 2. A lower casing 9 is sleeved on the drill pipe 1. The lower casing 9 is located below the upper casing 2. A lower flange 5 and an RJ flange 4 are provided on the lower casing 9, and the RJ flange 4 is located at the top of the lower flange 5. A steel pipe 6 is installed on one side of the drill pipe 1. One end of the steel pipe 6 is connected to a pressure water pipeline through a connecting quick connector. A pressure gauge 7 for pressure monitoring is installed on the top of the steel pipe 6. One end of the steel pipe 6 is connected to a pressure water pipeline through a connecting quick connector, and water is injected and pressurized by an external pressure water pipeline. Check that there is no water leakage or pressure leakage in the pipeline. The external pressure water pipeline continues to pressurize. During the process of water injection and pressurization, pay attention to observing the change of the pressure gauge 7. If the pointer of the pressure gauge 7 is stable, the pressure is stable, so as to achieve the purpose of testing the sealing performance of the grouting well.

[0026] In this embodiment, mounting holes 8 are provided on both the upper flange 3 and the lower flange 5. Bolts 11 are installed in the corresponding mounting holes 8. Nuts 12 are threadedly sleeved on the bolts 11. The outer surface of the lower part of the lower casing 9 is provided with an external thread. The lower casing 9 can be installed at the wellhead of the grouting well through the external thread on the lower casing 9. The upper flange 3 and the lower flange 5 can be fixedly connected by fixing the bolts 11 and the nuts 12, so as to connect the upper casing 2 and the lower casing 9.

[0027] In this embodiment, a plurality of reinforcing mechanisms 10 for reinforcing the lower casing 9 are provided on the outer side of the lower casing 9. The reinforcing mechanism 10 includes a U-shaped seat 13, a rotating shaft 14 and a rotating rod 15. The U-shaped seat 13 is fixedly installed on the lower casing 9. Rotating shafts 14 are rotatably installed on both inner walls of the U-shaped seat 13. A rotating rod 15 is fixedly installed on the rotating shaft 14. A threaded groove 17 is provided at the bottom of the rotating rod 15. A support screw 18 is threadedly installed in the threaded groove 17. When the lower casing 9 is installed at the wellhead, the rotating rod 15 is tilted by rotating the rotating rod 15. By rotating the support screw 18, under the action of the threaded groove 17, the support screw 18 rotates and moves at the same time. The support screw 18 can be inserted into the ground. Through the cooperation of the support screw 18 and the rotating rod 15, multi-directional lateral support for the lower casing 9 can be realized, and the purpose of increasing the stability of the placement of the lower casing 9 can be achieved. A magnet 16 is fixedly installed on one side of the rotating rod 15 close to the lower casing 9, and the magnet 16 is adsorbed and fixed to the lower casing 9. By providing the magnet 16, the stored rotating rod 15 can be adsorbed and fixedly installed on the lower casing 9.

[0028] In the present utility model, the upper flange 3 and the lower flange 5 can be fixedly connected through the fixing bolt 11 and the nut 12, so as to connect the upper casing 2 and the lower casing 9. One end of the steel pipe 6 is connected with a pressure water pipeline through a quick-connect joint, and water is injected and pressurized by an external pressure water pipeline. Check that there is no water leakage or pressure leakage in the pipeline. The external pressure water pipeline continues to pressurize. During the process of water injection and pressurization, pay attention to observing the change of the pressure gauge 7. If the pointer of the pressure gauge 7 is stable, the pressure is stable, so as to achieve the purpose of testing the sealing performance of the grouting well. When the lower casing 9 is installed at the wellhead, the rotating rod 15 is rotated to make the rotating rod 15 inclined. By rotating the support screw 18, under the action of the thread groove 17, the support screw 18 rotates and moves at the same time. The support screw 18 can be inserted into the ground. Through the cooperation of the support screw 18 and the rotating rod 15, multi-directional lateral support for the lower casing 9 can be realized, and the purpose of increasing the stability of the placement of the lower casing 9 can be achieved.

[0029] The above has introduced in detail a device for testing the sealing performance of the wellhead of a grouting well provided by the present utility model. Specific embodiments are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A wellhead sealing pressure testing device for a grouting well, characterized in that: It comprises a drill rod (1) installed on a drilling rig, wherein an upper casing (2) is provided on the drill rod (1), the top end of the upper casing (2) is welded and sealed to the drill rod (1), and an upper flange (3) is fixedly installed on the upper casing (2); The drill pipe (1) is sleeved with a lower casing (9), the lower casing (9) is located below the upper casing (2), the lower casing (9) is provided with a lower flange (5) and an RJ flange (4), and the RJ flange (4) is located on the top of the lower flange (5), a steel pipe (6) is installed on one side of the drill pipe (1), one end of the steel pipe (6) is connected to a pressurized water pipeline via a quick connector, and a pressure gauge (7) for pressure monitoring is installed on the top of the steel pipe (6).

2. A wellhead sealing pressure testing device for a grouting well according to claim 1, characterized in that: The upper flange (3) and the lower flange (5) are both provided with mounting holes (8), bolts (11) are installed in the corresponding mounting holes (8), and nuts (12) are threadedly sleeved on the bolts (11).

3. A wellhead sealing pressure testing device for a grouting well according to claim 1, characterized in that: The lower outer surface of the lower casing (9) is provided with an external thread, and the lower casing (9) can be installed at the wellhead of a grouting well through the external thread.

4. A wellhead sealing pressure testing device for a grouting well according to claim 1, characterized in that: The bottom end of the drill rod (1) is connected to a drilling tool in the well.

5. A wellhead sealing pressure testing device for a grouting well according to claim 1, characterized in that: The outer side of the lower casing (9) is provided with a plurality of reinforcement mechanisms (10) for reinforcing the lower casing (9).

6. A wellhead sealing pressure testing device for a grouting well according to claim 5, characterized in that: The reinforcement mechanism (10) comprises a U-shaped seat (13), a rotating shaft (14) and a rotating rod (15); the U-shaped seat (13) is fixedly mounted on the lower casing (9); the rotating shafts (14) are rotatably mounted on the inner walls of both sides of the U-shaped seat (13); and the rotating rod (15) is fixedly mounted on the rotating shaft (14).

7. A wellhead sealing pressure testing device for a grouting well according to claim 6, characterized in that: A thread groove (17) is provided at the bottom of the rotating rod (15), and a supporting screw rod (18) is installed in the thread groove (17) through the inner thread.

8. A wellhead sealing pressure testing device for a grouting well according to claim 6, characterized in that: A magnet (16) is fixedly mounted on one side of the rotating rod (15) close to the lower sleeve (9), and the magnet (16) is fixedly attached to the lower sleeve (9).

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