Water injection well replaces steel ring safe and fast butt joint process device

Abstract

The utility model discloses a water injection well replaces steel ring safe and fast butt joint process device, including process props open and tight fixed assembly, process props open and tight fixed assembly includes pipe connection assembly, wellhead connection assembly, one outer wall of pipe connection assembly, wellhead connection assembly sets up screw, and another outer wall sets up support axle, the support axle is rotationally arranged, and the axial positioning sets up support outer cylinder, support outer cylinder is with screw thread connection, the drive seat is rotationally arranged on support outer cylinder, the synchronous setting worm wheel is on support outer cylinder, the drive seat rotationally sets up worm, and worm is engaged with worm wheel. The utility model discloses has adopted worm wheel and worm design, and through spanner drive can save time and labour, has reduced the labor intensity of staff, has improved the operating safety.

Description

Technical Field

[0001] This utility model relates to the field of petroleum development technology, specifically to a safe and rapid docking process device for replacing steel rings in water injection wells. Background Technology

[0002] After an oil field is put into development, the formation pressure decreases as oil and gas are extracted, necessitating the replenishment of energy to the formation. Water injection is a measure that involves injecting water into the formation through injection wells to maintain formation pressure and improve oil production rate and recovery rate. However, due to the long-term exposure of the injection wellhead to high pressure and corrosion from the injected water, problems arise in the wellhead process such as leakage from the clamp steel ring, damage to the gate valve plate causing incomplete closure, leakage from the gate screw, and slippage between the gate screw and the gate plate. These issues affect the water injection effect, necessitating gate replacement. Furthermore, wastewater overflow can easily cause environmental pollution and affect on-site quality control.

[0003] When replacing the gate valve at the injection wellhead, the well must be shut down, the pressure released, and the clamp skin removed. External force is used to support the replacement of the steel ring or gate valve. However, after external force support is applied, there may be excessive clearance and misalignment on one side of the clamp head. After the wellhead replacement is completed and the external force support is removed, it is found that the wellhead process has undergone stress deformation and cannot be restored to its original state. Restoring the process at this point involves a significant workload, requiring 4-5 people simultaneously to pry, lift, and pull to align the clamp head. The operation takes approximately one hour, affecting water injection efficiency. The large number of operators also poses a risk of injury from slipping pry bars. In a certain management area with over 170 water wells, over 240 repairs were made in 2023 due to leakage in the injection wellhead clamp steel rings, and over 150 gate valves were replaced due to malfunctions. The oilfield currently has approximately 1250 operating water wells, resulting in a massive number of gate valve replacements and steel ring leakage repairs annually. This prolonged, multi-person operation mode has led to decreased water injection efficiency and increased operational risks.

[0004] Announcement No. CN204487461U discloses a disassembly method for a steel ring threaded expander, including an expander body. The expander body consists of an adjusting tube, support legs, and anti-slip grooves. The adjusting tube has a locking platform in the middle of its wall, and both ends of the adjusting tube have forward and reverse threads on their inner walls. The support legs consist of a support rod and a support block. One end of the support rod has a thread, and the other end of the support rod is welded with a support block. The two support legs are respectively fitted into the interior of both ends of the adjusting tube through the threads on the support rod in a forward and reverse rotation manner. The top surface of the support block has an anti-slip groove.

[0005] The force application scheme of the prior art is different from that of this patent.

[0006] Announcement No. CN204382185U discloses a steel ring replacement tool, including a lever, a lead screw, a connecting rod seat, pipe clamps, and a wedge-shaped semi-ring. The lever is T-shaped, with the front end of the middle rod of the T-shaped lever fixedly connected to the rear end of the lead screw. The connecting rod seat has a threaded hole penetrating its front and rear surfaces in the middle part. The front end of the lead screw passes through the threaded hole and is rotatably connected to the middle part of the outer semi-ring of the wedge-shaped semi-ring through a connector, and the lead screw is perpendicular to the connecting rod seat. There are two pipe clamps, which are symmetrically fixed on the connecting rod seat through clamp connecting plates and located on both sides of the wedge-shaped semi-ring, and the central axis of the pipe clamps is parallel to the connecting rod seat.

[0007] The existing technology intelligently generates a single-sided gap by opening the gap with a wedge block, which is inconvenient in actual use.

[0008] Announcement No. CN204366901U discloses a valve changer, including a clamp, a connecting structure, a jack base, and a jack. The clamp can be fitted onto the outside of a vertical oil pipe to lock the vertical oil pipe. One end of the connecting structure is fixedly connected to the clamp, and the other end of the connecting structure is engaged with one end of the jack base. The other end of the jack base is engaged with a large flange. The jack is disposed inside the jack base, which is a telescopic component. Both ends of the jack base can move horizontally under the action of the jack.

[0009] The force application scheme of the prior art is different from that of this patent.

[0010] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0011] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model provides a safe and fast docking process device for replacing steel rings in water injection wells.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] The device for safe and rapid connection of steel ring replacement in water injection wells includes a pipe connection assembly and a wellhead connection assembly. A lead screw is installed on the outer wall of one of the pipe connection assemblies and the wellhead connection assembly, and a support shaft is installed on the outer wall of the other. A support outer cylinder is rotatably and axially positioned on the support shaft. The support outer cylinder is threadedly connected to the lead screw. A drive seat is rotatably mounted on the support outer cylinder, and a worm gear is synchronously mounted on the support outer cylinder. A worm is rotatably mounted on the drive seat, and the worm meshes with the worm gear.

[0014] Furthermore, a first support ring is provided on the inner wall of the outer support cylinder; a second support ring is provided on the outer wall of the support shaft; the end of the outer support cylinder away from the lead screw is connected to a first support plate, and the second support ring is located between the first support ring and the first support plate;

[0015] Specifically, axial force bearings are provided between the first support ring and the second support ring, and between the second support ring and the first support plate.

[0016] Furthermore, a third support ring is provided on the inner wall of the drive seat; a fourth support ring is provided on the outer wall of the support outer cylinder; the outer wall of the support outer cylinder is connected to the second support plate by screws; the third support ring is located between the fourth support ring and the second support plate;

[0017] Specifically, axial force bearings are provided between the third support ring and the fourth support ring, and between the third support ring and the second support plate.

[0018] Furthermore, the worm gear is integrally formed with the supporting outer cylinder, or connected by a key.

[0019] Furthermore, the pipe connection assembly is a clamp, the outer wall of the clamp is connected to the lead screw or support shaft, and the axis of the clamp is perpendicular to the axis of the lead screw and the axis of the support shaft.

[0020] Furthermore, the wellhead connection assembly includes a connecting plate, a sliding groove is provided on the connecting plate, a fixed sleeve passes through the sliding groove, the connecting plate is connected to a support shaft or a lead screw, and the axis of the fixed sleeve is perpendicular to the axis of the lead screw and the axis of the support shaft.

[0021] Furthermore, the pipe connection assembly, wellhead connection assembly, worm gear, worm, support outer cylinder, and lead screw constitute a process-spreading, tensioning, and fixing assembly;

[0022] Specifically, the docking process device also includes a process reset and correction assembly;

[0023] Specifically, the process reset and correction assembly includes a locking body, which is U-shaped and includes a fork wall, a horizontal wall, and a double fork wall;

[0024] Specifically, a first locking bolt is provided through the first fork wall, and a second locking bolt is provided through the second fork wall. The first locking bolt and the second locking bolt are rotatably connected to locking teeth at the ends of the locking body.

[0025] Specifically, an adjustment base plate is provided on one end face of the locking body, and an adjustment bolt is provided through the adjustment base plate.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This utility model adopts a worm gear design, which can save time and effort by being driven by a wrench, reducing the labor intensity of employees and improving operational safety.

[0028] 2. This utility model adopts a spreading and tightening fixing assembly and a process reset and correction assembly, which can realize safe and fast maintenance and replacement of steel rings in water injection wells, significantly shortening the repair time, reducing downtime and maintenance costs, and improving work efficiency.

[0029] 3. This utility model adopts a miniaturized design and fully considers the structural characteristics of the water injection wellhead device. Through the fixed combination of the clamp assembly and the fixing sleeve, the steel ring of the water injection well can be quickly replaced, reducing the replacement time and making the maintenance work simple and convenient.

[0030] 4. This device has a wide range of applications. It can be used at the wellhead of water injection wells and at water injection valve assemblies.

[0031] 5. The clamp assembly and fixing sleeve of this utility model realize the tensioning and fixing function, which can firmly support the device on the operating plane for operation; the reset and correction assembly of this utility model can adjust the misalignment in different directions by installing the reset device, which is easy to install and operate; the tensioning and fixing assembly and the process reset and correction assembly can be operated separately or in combination, which can improve the water injection rate and help the green, low-carbon and sustainable development of the energy industry. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the process spreading, tensioning and fixing assembly in this utility model.

[0033] Figure 2 This is a schematic diagram of the process reset and correction assembly in this utility model.

[0034] Figure 3 This is a schematic diagram of the connection between the outer support cylinder and the support shaft in this utility model.

[0035] Figure 4 This is a schematic diagram of the connection between the outer support cylinder and the drive seat in this utility model.

[0036] Figure 5 This is a schematic diagram of the wellhead.

[0037] In the diagram: 1. Pipe connection assembly; 2. Connecting plate; 3. Fixing sleeve; 4. Support outer cylinder; 41. First support ring; 42. Fourth support ring; 5. Lead screw; 6. Worm gear; 7. Worm; 8. Key; 9. First locking bolt; 10. Second locking bolt; 11. Locking nut; 12. Adjusting bolt; 13. Locking body; 14. Support shaft; 141. Second support ring; 15. Drive seat; 151. Third support ring; 16. First support plate; 17. Second support plate.

[0038] 201. Wellhead; 202. Gate; 203. Steel ring; 204. Four-way connector; 205. Oil tubing; 206. Oil tubing delivery line; 207. Wellhead delivery line. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example 1:

[0041] Please see Figure 1 , Figure 3 , Figure 4 , Figure 5 The present invention provides a safe and quick docking process device for replacing steel rings in water injection wells, including a process opening, tightening and fixing assembly, which is used to open the opening function to increase the operating gap, tighten the tightening function to reduce the closing gap, and fix the installation to ensure stability and firmness.

[0042] The process-spreading, tensioning, and fixing assembly includes a pipe connection assembly 1 and a wellhead connection assembly. The pipe connection assembly 1 is used to fix the tubing 205, and the wellhead connection assembly is used to fix the wellhead 201. A lead screw 5 is installed on the outer wall of one of the pipe connection assemblies 1 and the wellhead connection assembly, and a support shaft 14 is installed on the other outer wall. A support outer cylinder 4 is rotatably and axially positioned on the support shaft 14. The support outer cylinder 4 is threadedly connected to the lead screw 5. A drive seat 15 is rotatably installed on the support outer cylinder 4, and a worm gear 6 is synchronously installed on the support outer cylinder 4. A worm 7 is rotatably installed on the drive seat 15, and the worm 7 meshes with the worm gear 6. In use, the... The fixed assembly is fixed to the wellhead 201, the pipe connection assembly 1 is connected to the tubing 205, and the wellhead connection assembly is connected to the wellhead 201. The worm 7 is rotated by a tool and stabilized so that it does not rotate around the supporting outer cylinder 4. The worm 7 drives the worm wheel 6, which in turn drives the supporting outer cylinder 4 to rotate. The screw 5 and the supporting outer cylinder 4 are uncoupled, and the pipe connection assembly 1 moves away from the fixed assembly. The distance between the tubing delivery line 206 and the wellhead delivery line 207 increases. When the disassembly distance is reached, the steel ring 203 or the gate valve 202 can be disassembled. Conversely, the tubing delivery line 206 and the wellhead delivery line 207 can be tightened to complete the installation of the steel ring 203 or the gate valve 202.

[0043] Specifically, the worm gear 7 extends out of the drive seat 15 and is provided with a connecting handle for connecting to a wrench. In order to make it easier to stabilize the drive seat 15, the wrench is a double-handle socket wrench.

[0044] Specifically, a first support ring 41 is provided on the inner wall of the outer support cylinder 4, and a second support ring 141 is provided on the outer wall of the support shaft 14. The end of the outer support cylinder 4 away from the lead screw 5 is connected to the first support plate 16 by screws. The second support ring 141 is located between the first support ring 41 and the first support plate 16. An axial force bearing, such as a thrust bearing or a tapered roller bearing, is provided between the first support ring 41 and the second support ring 141 and between the second support ring 141 and the first support plate 16 to achieve rotational connection and bidirectional axial positioning.

[0045] Specifically, a third support ring 151 is provided on the inner wall of the drive seat 15, and a fourth support ring 42 is provided on the outer wall of the outer support cylinder 4. The outer wall of the outer support cylinder 4 is connected to the second support plate 17 by screws. The third support ring 151 is located between the fourth support ring 42 and the second support plate 17. An axial force bearing is provided between the third support ring 151 and the fourth support ring 42, and between the third support ring 151 and the second support plate 17, so as to realize rotational connection and bidirectional axial positioning.

[0046] Specifically, the worm gear 6 is integrally formed with the supporting outer cylinder 4, or connected by a key 8.

[0047] Furthermore, the pipe connection assembly 1 is a clamp, the outer wall of which is threadedly connected to the lead screw 5 or the support shaft 14, and the axis of the clamp is perpendicular to the axis of the lead screw 5 and the axis of the support shaft 14.

[0048] Furthermore, the wellhead connection assembly includes a connecting plate 2, on which a sliding groove is provided, and a fixed sleeve 3 is inserted into the sliding groove. The connecting plate 2 is connected to the support shaft 14 or the lead screw 5 by welding, and the axis of the fixed sleeve 3 is perpendicular to the axis of the lead screw 5 and the axis of the support shaft 14.

[0049] Preferably, this device is made of stainless steel, which has a long service life and can be reused.

[0050] When replacing the steel ring 203 of the wellhead 201, first stop the well and depressurize it. Then, remove the fastening bolts of the steel ring. Install the process support and tightening assembly in the safe and quick docking process device for replacing the steel ring of the water injection well below or above the gate 202 that needs to be replaced. Install the pipe connection assembly 1 on one side of the tubing 205. Adjust the position of the connecting plate 2 to tighten the fixing sleeve 3 and install it on the fixing bolt of the large four-way connector 204 of the wellhead 201. Use a special wrench to tighten the worm gear mechanism. The worm 7 drives the worm wheel 6, and the worm wheel 6 drives the outer support cylinder 4 to rotate through the key 8, so that the screw 5 moves outward to open the operating gap that allows the steel ring 203 or gate 202 to be removed. Then, replace the steel ring 203 or gate 202.

[0051] After replacing steel ring 203 or gate 202, tighten the worm gear mechanism in the opposite direction to reduce the closing gap.

[0052] Example 2:

[0053] Based on Example 1, combined with Figure 2 This embodiment also includes a process reset and correction assembly, which is used to achieve precise alignment and complete process docking.

[0054] The process reset and correction assembly includes a locking body 13, which is U-shaped and includes a fork wall, a horizontal wall, and a second fork wall. A first locking bolt 9 is provided through the fork wall, and a second locking bolt 10 is provided through the second fork wall. The first locking bolt 9 and the second locking bolt 10 are rotatably inserted into locking teeth 11 at the ends of the locking body 13 by pins. An adjustment base plate is provided on one end face of the locking body 13, and an adjustment bolt 12 is provided through the adjustment base plate.

[0055] After replacing the steel ring 203 or the gate 202, tighten the worm gear mechanism in the opposite direction to reduce the closing gap. If the clamp head is misaligned, install and fix the process positioning and correction assembly. Tighten the clamp head of the locking body 13 and the conveying pipeline together with the first locking nut 9 and the second locking nut 10. Tighten the adjusting bolt 12 to correspond with the gate 202. According to the principle of force interaction, tighten the adjusting bolt 12 until the gate 202 and the conveying pipeline are back to the same axis position. Then, tighten the worm gear mechanism with a special wrench to completely close the gap. Attach the clamp skin and finally complete the clamp installation.

[0056] This patent solves the problem of long disassembly and resetting time and multiple personnel involved in the 201 process of water injection wellhead, which poses safety hazards.

[0057] By following the steps above, the replacement of the wellhead steel ring in the water injection well can be completed quickly, safely, and efficiently, improving both work efficiency and safety.

[0058] This invention, through the adoption of two specialized designs—a spreading and tightening fixing assembly and a process reset and correction assembly—enables rapid replacement and maintenance of the wellhead steel ring in water injection wells, significantly shortening replacement time and improving water injection efficiency. Simultaneously, the design of the device fully considers safety during operation, strengthening the fixing combination of the assemblies at both ends to achieve safe operation, reduce operational risks, and make maintenance work simpler and more convenient. This device not only reduces the labor intensity of employees, decreases downtime and maintenance costs, but also reflects respect for and protection of the environment, meeting the requirements of safety, environmental protection, and sustainable development.

[0059] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0060] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A safe and quick docking process device for replacing steel rings in water injection wells, comprising a pipe connection assembly and a wellhead connection assembly, characterized in that: A lead screw is provided on the outer wall of one of the pipe connection assembly and the wellhead connection assembly, and a support shaft is provided on the other outer wall. The outer support cylinder is rotatably and axially positioned on the support shaft; The outer support cylinder is threadedly connected to the lead screw. A drive seat is rotatably mounted on the outer support cylinder. A worm wheel is synchronously mounted on the outer support cylinder. A worm is rotatably mounted on the drive seat. The worm meshes with the worm wheel.

2. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, The inner wall of the outer support cylinder is provided with a first support ring; the outer wall of the support shaft is provided with a second support ring; the end of the outer support cylinder away from the lead screw is connected to a first support plate, and the second support ring is located between the first support ring and the first support plate; An axial force bearing is provided between the first support ring and the second support ring, and between the second support ring and the first support plate.

3. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, A third support ring is provided on the inner wall of the drive seat; a fourth support ring is provided on the outer wall of the outer support cylinder; the outer wall of the outer support cylinder is connected to the second support plate by screws; the third support ring is located between the fourth support ring and the second support plate; An axial force bearing is provided between the third support ring and the fourth support ring, and between the third support ring and the second support plate.

4. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, The worm gear is integrally formed with the supporting outer cylinder, or connected by a key.

5. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, The pipe connection assembly is called a clamp, the outer wall of the clamp is connected to the lead screw or support shaft, and the axis of the clamp is perpendicular to the axis of the lead screw and the axis of the support shaft.

6. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, The wellhead connection assembly includes a connecting plate with a sliding groove. A fixed sleeve is inserted into the sliding groove. The connecting plate is connected to a support shaft or a lead screw. The axis of the fixed sleeve is perpendicular to the axis of the lead screw and the axis of the support shaft.

7. The safe and rapid docking process device for replacing steel rings in water injection wells according to claim 1, characterized in that, The pipe connection assembly, wellhead connection assembly, worm gear, worm, support outer cylinder, and lead screw together form a process-opening, tensioning, and fixing assembly; The docking process device also includes a process reset and correction assembly; The process reset and correction assembly includes a locking body, which is U-shaped and includes a single-fork wall, a horizontal wall, and a double-fork wall. The first locking bolt is provided through the first fork wall, and the second locking bolt is provided through the second fork wall. The first locking bolt and the second locking bolt are rotatably connected to the locking teeth at the end of the locking body. An adjustment base plate is provided on one end face of the locking body, and an adjustment bolt is provided through the adjustment base plate.

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