Pressure tapping device for long shut-in well

Abstract

The utility model relates to the technical field of pressure pipeline tapping operation, in particular to a long shut-in well pressure tapping device which comprises a fixing frame. A hydraulic cylinder is installed on the fixed frame, a movable frame is installed in the fixed frame in a limited sliding mode, the hydraulic cylinder is in transmission connection with the movable frame, a hydraulic motor is arranged in the movable frame, a rotating shaft of the hydraulic motor is in transmission connection with a drill rod through a universal joint, the front end of the drill rod extends out of the fixed frame, and the drill rod is in sealed connection with the fixed frame. The fixing frame is in sealed connection with a sealing structure in the trepanning operation process. In the using process, the tapping device is connected with a sealing structure in the tapping operation process, axial pushing force is provided through the hydraulic cylinder, the hydraulic motor drives the drill rod to rotate, tapping operation on a pipeline under pressure is achieved, using in the process is more labor-saving and convenient, and meanwhile the tapping device is more stable and safer. And the use in engineering practice is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure pipeline opening operations, in particular to a pressure opening device for a long shut-in well. Background Art

[0002] Due to the needs of oil production and development, when oil fields are shut down for a long time and need to be put back into production or implement other operations, the original wellhead valve is often damaged, welded, etc. and cannot be opened, making conventional operations impossible. At this time, it is necessary to perform drilling operations at the original valve or original pipe mouth; but because it is impossible to determine whether there is pressure in the wellbore pipeline, gas welding and other methods cannot be used to directly drill holes, and pressure drilling operations are required.

[0003] In response to the above problems, the applicant has developed a set of pressure-opening equipment based on long-term engineering practice, and recorded it in the previously applied Chinese utility model patent: "CN219013652U A sealing structure at the opening position of an ultra-high pressure transmission pipeline". However, the equipment adopts a manual opening method, which has many inconveniences in the actual operation process, such as low efficiency, time-consuming and labor-intensive.

[0004] Therefore, based on the above, the applicant further improved and optimized the hole-opening device in the equipment to solve the drawbacks of the original equipment during use. Utility Model Content

[0005] The purpose of the utility model is to provide a long shut-in well pressure opening device in view of the deficiencies of the above-mentioned prior art, so as to achieve the purpose of being more convenient and stable to use during the pressure opening of a long shut-in well pipeline and effectively improving the construction efficiency.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a long well shut-in pressure hole opening device, including a fixed frame, a movable frame is installed in the fixed frame for limiting sliding, a hydraulic cylinder is fixedly installed on the fixed frame, the hydraulic cylinder is transmission connected to the movable frame, a hydraulic motor is installed in the movable frame, the hydraulic motor is transmission connected to the drill pipe through a universal joint, and the connection between the drill pipe and the fixed frame is sealed.

[0007] Furthermore, the fixed frame is provided with guide rods, the number of which is two, and the movable frame is installed by limiting sliding of the guide rods.

[0008] Furthermore, the fixing frame is provided with a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are fixedly connected via a connecting rod, and the guide rod is provided between the first mounting plate and the second mounting plate.

[0009] Furthermore, a third mounting plate and a fourth mounting plate are provided in the mobile frame, the third mounting plate is transmission-connected to the hydraulic cylinder, and the cylinder body of the hydraulic cylinder is fixedly connected to the first mounting plate.

[0010] Furthermore, ear plates are provided on the third mounting plate, pin holes are provided on the ear plates, and a spherical eye joint is correspondingly provided at the front end of the piston rod of the hydraulic cylinder. The pin hole on the ear plate is connected to the spherical eye joint at the front end of the piston rod of the hydraulic cylinder through a cylindrical pin.

[0011] Furthermore, the third mounting plate and the fourth mounting plate are connected through sleeves. There are two sleeves, which are respectively sleeved on two guide rods.

[0012] Furthermore, linear bearings are provided at both ends of the sleeve. The linear bearings are fixedly connected to the third mounting plate and the fourth mounting plate respectively. The linear bearings are sleeved on the guide rods and cooperate with the guide rods.

[0013] Furthermore, the hydraulic motor is mounted on the fourth mounting plate, and the rotating shaft of the hydraulic motor is drivingly connected to the drill pipe through a universal joint.

[0014] Furthermore, the drill pipe is hermetically connected to the second mounting plate. An installation hole is provided on the second mounting plate, and a sealing sleeve is installed through the installation hole. The drill pipe cooperates with the sealing sleeve.

[0015] Furthermore, a connecting portion is provided at the front end of the sealing sleeve, and a sealing ring is fixedly provided in the sealing sleeve. The sealing ring is in sealing cooperation with the drill pipe.

[0016] Advantages of the present utility model:

[0017] 1. In the present utility model, a hydraulic cylinder is used to provide axial driving force, and a hydraulic motor is used to provide power for the drill pipe. During the process of pressure tapping on a long-closed well pipeline, it is more labor-saving and convenient to use, which helps to improve the construction efficiency;

[0018] 2. In the present utility model, the hydraulic motor is drivingly connected to the drill pipe through a universal joint, which can solve the problem of non-concentricity between the hydraulic motor and the drill pipe caused by various reasons during the manufacturing, installation, and use of the device, making the use of the device more stable and reliable;

[0019] 3. The present utility model is provided with linear bearings at the connection between the moving frame and the guide rods, further ensuring the stability of use, and a sealing sleeve is provided between the drill pipe and the second mounting plate to ensure the sealing performance during use, both of which play a positive role in the stable and safe use of the device. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a schematic diagram of the fixed frame structure of the present utility model;

[0022] Figure 3 is a schematic diagram of the connection structure between the hydraulic motor and the drill pipe of the present utility model;

[0023] Figure 4 is a schematic diagram of the installation of the seal sleeve structure of the present utility model.

[0024] Figure 5 is a schematic diagram of the mobile rack structure of the present utility model.

[0025] The names corresponding to the marks in the figure:

[0026] 1. Fixed rack; 11. First mounting plate; 12. Second mounting plate; 121. Mounting hole; 13. Connecting rod; 14. Seal sleeve; 141. Connecting part; 142. Sealing ring; 143. Compression gland; 144. Locking cover; 2. Hydraulic cylinder; 3. Guide rod; 4. Mobile rack; 41. Third mounting plate; 411. Ear plate; 42. Fourth mounting plate; 43. Sleeve; 44. Cylindrical pin; 45. Linear bearing; 5. Hydraulic motor; 6. Universal joint; 7. Drill pipe. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0028] Embodiments of the present utility model:

[0029] As Figures 1-5 shown, in this embodiment, a fixed rack 1 is provided. A first mounting plate 11 and a second mounting plate 12 are provided in the fixed rack 1. The first mounting plate 11 and the second mounting plate 12 are connected by a connecting rod 13. In this embodiment, there are four connecting rods 13 and they are evenly arranged in a rectangle.

[0030] In this embodiment, a hydraulic cylinder 2 is fixedly installed on the first mounting plate 11. The cylinder body of the hydraulic cylinder 2 is located outside the fixed rack 1, and the piston rod of the hydraulic cylinder 2 passes through the through hole on the first mounting plate 11 and extends into the interior of the fixed rack 1.

[0031] In this embodiment, a guide rod 3 is further provided between the first mounting plate 11 and the second mounting plate 12. The number of the guide rods 3 is two and they are symmetrically arranged about the axis of the fixed rack 1. A mobile rack 4 is slidably installed through the guide rod 3.

[0032] In this embodiment, a third mounting plate 41 and a fourth mounting plate 42 are provided in the moving frame 4. A sleeve 43 is connected between the third mounting plate 41 and the fourth mounting plate 42. There are two sleeves 43 which are respectively sleeved on the guide rods 3 on both sides. Thus, the moving frame 4 can slide stably on the guide rods 3. Particularly, linear bearings 45 are provided at both ends of the sleeves 43 on both sides, and the guide rods 3 are connected to the linear bearings 45 to improve the stability of use.

[0033] In this embodiment, ear plates 411 are provided on the outer side of the third mounting plate 41. There are two ear plates 411 which are arranged vertically. Corresponding pin holes are provided on the two ear plates 411, and a spherical eye joint is correspondingly provided at the front end of the piston rod of the hydraulic cylinder 2. The spherical eye joint at the front end of the piston rod is inserted between the two ear plates 411 and a cylindrical pin 44 is inserted to realize the connection between the moving frame 4 and the hydraulic cylinder 2.

[0034] In this embodiment, a hydraulic motor 5 is fixedly installed on the fourth mounting plate 42. The hydraulic motor 5 is located inside the moving part. The rotating shaft of the hydraulic motor 5 extends to the outside of the moving frame 4 and is connected to the drill pipe 7 through a universal joint 6.

[0035] In this embodiment, a mounting hole 121 is formed in the second mounting plate 12. A sealing sleeve 14 is installed in the mounting hole 121. The drill pipe 7 extends out of the fixed frame 1 through the sealing sleeve 14. A connecting portion 141 is provided at the front end of the sealing sleeve 14. The connecting portion 141 can be hermetically docked with the pipeline sealing structure when the opening is used in the present utility model. And a sealing ring 142 is provided in the sealing sleeve 14. The sealing ring 142 is used for the seal between the drill pipe 7 and the second ear plate 12. A gland 143 is provided for the sealing ring 142 to fix the sealing ring 142. The sealing sleeve 14 is fixedly installed on the second mounting plate 12 through a locking cover 144.

[0036] The principle of the present utility model is:

[0037] When the present utility model is in use, it is docked with the pipeline sealing structure during opening. For the pipeline sealing structure, it is the sealing structure in the applicant's prior application and recorded in the Chinese utility model patent: "CN219013652U A Sealing Structure at the Opening Position of an Ultra-High Pressure Transmission Pipeline". The docking part can adopt threaded seal connection, which will not be elaborated here.

[0038] When the utility model is in use, a stable axial driving force is provided by the hydraulic cylinder 2 (the control of the hydraulic cylinder 2 is a mature existing technology and will not be elaborated here), and the drill pipe 7 is driven to rotate by the hydraulic motor 5 (the hydraulic motor 5 is an existing one and will not be elaborated here). At this time, the drill pipe 7 passes through the valve in the docking part and the sealing structure, so as to realize the pressure-bearing hole opening operation on the long-closed well pipeline. After the hole opening operation, the drill pipe 7 is withdrawn to the rear of the valve in the aforementioned sealing structure. At this time, the valve is closed to cut off the connection between the long-closed well pipeline and the hole opening device of the utility model. At this time, the drill pipe 7 continues to retreat. Since the retreat of the drill pipe 7 will create a certain amount of space, the liquid pressure in the pipeline between the valve and the hole opening device will be relieved. At this time, the hole opening device is removed from the aforementioned sealing mechanism, and the entire pressure-bearing hole opening operation process can be completed.

[0039] During the use of the utility model, a universal joint 6 is adopted to connect the hydraulic motor 5 and the drill pipe 7. During the use process, the universal joint 6 does not affect the transmission when there is a certain angle change. Therefore, the problem that the drill pipe 7 and the rotating shaft of the hydraulic motor 5 are not concentric can be effectively avoided. It is convenient for installation and also makes the stability of the utility model better during the use process.

Claims

1. A long shut-in pressure tapping device, characterized in that: The invention comprises a fixed frame (1), a movable frame (4) is installed in a limited sliding manner in the fixed frame (1), a hydraulic cylinder (2) is fixedly installed on the fixed frame (1), the hydraulic cylinder (2) is transmission-connected to the movable frame (4), a hydraulic motor (5) is installed in the movable frame (4), the hydraulic motor (5) is transmission-connected to a drill rod (7) through a universal joint (6), and the connection between the drill rod (7) and the fixed frame (1) is sealed.

2. A long shut-in well tapping device under pressure according to claim 1, characterized in that: The fixed frame (1) is provided with a guide rod (3), the number of the guide rods (3) being two, and the movable frame (4) is installed by limiting sliding through the guide rods (3).

3. A long shut-in well pressure tapping device according to claim 2, characterized in that: The fixing frame (1) is provided with a first mounting plate (11) and a second mounting plate (12); the first mounting plate (11) and the second mounting plate (12) are fixedly connected via a connecting rod (13); and the guide rod (3) is provided between the first mounting plate (11) and the second mounting plate (12).

4. A long shut-in well pressure tapping device according to claim 3, characterized in that: The mobile frame (4) is provided with a third mounting plate (41) and a fourth mounting plate (42); the third mounting plate (41) is transmission-connected to the hydraulic cylinder (2); and the cylinder body of the hydraulic cylinder (2) is fixedly connected to the first mounting plate (11).

5. A long shut-in well tapping device under pressure according to claim 4, characterized in that: The third mounting plate (41) is provided with an ear plate (411), a pin hole is provided on the ear plate (411), a fisheye joint is correspondingly provided at the front end of the piston rod of the hydraulic cylinder (2), and the pin hole on the ear plate (411) is connected to the fisheye joint at the front end of the piston rod of the hydraulic cylinder (2) via a cylindrical pin (44).

6. A long shut-in well tapping device under pressure according to claim 4, characterized in that: The third mounting plate (41) and the fourth mounting plate (42) are connected via a sleeve (43). There are two sleeves (43) which are respectively sleeved on the two guide rods (3).

7. A long shut-in well tapping device under pressure according to claim 6, characterized in that: Linear bearings (45) are provided at both ends of the sleeve (43). The linear bearings (45) are fixedly connected to the third mounting plate (41) and the fourth mounting plate (42) respectively. The linear bearings (45) are sleeved on the guide rod (3) and matched with the guide rod (3).

8. The long shut-in well pressure tapping device according to claim 4, characterized in that: The hydraulic motor (5) is mounted on the fourth mounting plate (42), and the rotating shaft of the hydraulic motor (5) is transmission-connected to the drill rod (7) via a universal joint (6).

9. A long shut-in well tapping device under pressure according to claim 8, characterized in that: The drill rod (7) is sealedly connected to the second mounting plate (12). A mounting hole (121) is provided on the second mounting plate (12). A sealing sleeve (14) is installed through the mounting hole (121). The drill rod (7) and the sealing sleeve (14) are matched.

10. A long shut-in well tapping device under pressure according to claim 9, characterized in that: The front end of the sealing sleeve (14) is provided with a connecting portion (141), a sealing ring (142) is fixedly arranged in the sealing sleeve (14), and the sealing ring (142) is in sealing cooperation with the drill rod (7).

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