Wellhead oil pipe centralizer
By introducing a swing reduction assembly and pressure sensor into the wellhead oil pipe regularizer, the oil pipe side deviation is monitored and warned in real time, the problem of wear of the wellhead oil pipe under special circumstances is solved, and safety and stability are improved.
Patent Information
- Application Number
- CN202423180265.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In special circumstances, it is difficult to detect excessive anti-combination force in time, resulting in wear and tear of the oil pipe or straightener, which poses safety hazards.
A wellhead oil pipe straightener is designed, including a sleeve, inner ring groove, swing reduction assembly and pressure sensor. The side deviation of the oil pipe is reduced through the roller and spring structure. It is equipped with an acoustic and optical alarm to monitor the pressure in real time, and early warning is made when the warning value exceeds.
It effectively reduces the side deviation and wear of the oil pipe, improves safety, and ensures the normal production of the oil well and the timeliness of equipment maintenance.
Smart Images
Figure CN223136080U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil and gas exploitation, in particular to a wellhead tubing centralizer. Background Technique
[0002] The wellhead tubing centralizer is an important device for supporting and fixing the tubing. The wellhead tubing centralizer is mainly used to maintain the stability and verticality of the tubing in the wellhead, prevent the tubing from shifting or deforming due to external forces, and by ensuring the correct position of the tubing in the wellhead, the wellhead tubing centralizer helps to maintain the normal production of the oil well, reduce energy consumption and maintenance costs. Under normal circumstances, the abutting force between the centralizer and the tubing is controllable and within the design range. However, in some special cases (such as abnormal liquid pressure in the wellbore, sudden change in the movement state of the sucker rod, etc.), the abutting force may exceed the expectation, and it is difficult for the staff to detect it in time, resulting in excessive wear of the tubing or the centralizer, and easily inducing safety accidents.
[0003] Therefore, it is necessary to provide a new wellhead tubing centralizer to solve the above technical problems. Content of the Utility Model
[0004] To solve the above technical problems, the utility model provides a wellhead tubing centralizer.
[0005] The wellhead tubing centralizer provided by the utility model includes a sleeve, an inner ring groove is opened in the sleeve, and a plurality of annularly distributed descending swing components are arranged in the inner ring groove, and the side deviation of the tubing is reduced through the descending swing components;
[0006] The descending swing component includes a mounting frame, a plurality of rotatably connected rollers are mounted on the mounting frame, and a butting rod is fixedly mounted on the surface of the mounting frame facing away from the axis of the sleeve. The butting rod passes through a coaxial variable-diameter hole opened in the sleeve, and a spring is sleeved on the butting rod;
[0007] A plurality of annularly distributed grooves are opened on the outer wall of the sleeve, and the grooves correspond to the descending swing components one by one. A protective cover is fixedly mounted on each groove, and a pressure sensor opposite to the butting rod is fixedly mounted in the protective cover.
[0008] Preferably, the coaxial variable-diameter hole is arranged along the radial direction of the sleeve, and the coaxial variable-diameter hole is a gradually changing structure with the aperture decreasing from inside to outside.
[0009] Preferably, a socket ring is fixedly sleeved on the butting rod, one end of the spring is fixedly connected to the outer ring surface of the socket ring, and the other end of the spring is fixedly connected to the inner hole wall of the coaxial variable-diameter hole.
[0010] Preferably, two symmetrically distributed limiting rods are fixedly installed on the surface of the mounting frame facing away from the axis of the sleeve, and the two limiting rods respectively pass through two limiting holes opened in the sleeve and are slidably connected to the limiting holes.
[0011] Preferably, the rod head of the abutting rod extends into the protective cover and is fixedly installed with a rubber abutting socket head for abutting against the pressure sensor.
[0012] Preferably, a controller for displaying the value of the pressure sensor is installed on the protective cover, and an audible and visual alarm is also installed on the protective cover.
[0013] Preferably, a connecting flange is fixedly installed at the bottom of the sleeve, and a plurality of mounting holes are opened in the connecting flange.
[0014] Compared with the related art, the wellhead tubing centralizer provided by the present utility model has the following beneficial effects:
[0015] 1. In the present utility model, the outer wall of the tubing abuts against the roller, thereby driving the abutting rod to slide outwards from the coaxial variable-diameter hole, and then the spring is compressed. Moreover, the rollers of multiple groups of swing-down components abut against the outer wall of the tubing, reducing the hidden danger of the tubing from side deviation and side slip. At the same time, the designed spring can effectively eliminate part of the side deviation stress of the tubing.
[0016] 2. In the present utility model, when the tubing deflects to one side, the roller in this direction receives a large abutting force, thereby driving the length of the rod section of the abutting rod sliding into the protective cover to become longer until the rubber abutting socket head abuts against the pressure sensor. Then, the controller can immediately display the pressure value of the tubing deflecting to this side. If the value displayed by the pressure sensor exceeds the pre-set warning value, the audible and visual alarm can give a warning, enabling the staff to immediately know and quickly carry out maintenance, greatly reducing the wear degree of the equipment and the tubing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of the wellhead tubing centralizer provided by the present utility model;
[0018] Figure 2 is Figure 1 a schematic structural diagram of the swing-down component in the sleeve when the sleeve shown in
[0019] Figure 3 is Figure 2 a schematic cross-sectional structure diagram of the sleeve shown in
[0020] Figure 4 is Figure 2 a schematic structural diagram of the swing-down component shown in
[0021] Figure 5 is Figure 1Schematic structural diagram of the protective cover shown
[0022] Figure 6 is Figure 5 Schematic internal structure diagram of the protective cover shown
[0023] Reference numerals in the figure: 1, sleeve; 1a, inner ring groove; 1b, coaxial variable-diameter hole; 1c, limiting hole; 1d, groove; 11, connecting flange; 11a, mounting hole; 2, descending swing assembly; 21, mounting frame; 22, roller; 23, abutting rod; 231, rubber abutting sleeve head; 24, socket ring; 25, spring; 26, limiting rod; 3, protective cover; 4, pressure sensor; 5, controller; 6, sound and light alarm Specific embodiments
[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model
[0025] The following describes the specific implementation of the present utility model in detail with reference to specific embodiments
[0026] Please refer to Figures 1 to 6 , a wellhead tubing centralizer provided by an embodiment of the present utility model, the wellhead tubing centralizer includes a sleeve 1 and a descending swing assembly 2
[0027] In an embodiment of the present utility model, please refer to Figures 1 to 6 , a connecting flange 11 is fixedly installed at the bottom of the sleeve 1, and a plurality of mounting holes 11a are opened on the connecting flange 11. The connecting flange 11 is installed on the oil well wellhead and fixed with screws to keep the sleeve 1 coaxially arranged with the wellhead
[0028] An inner ring groove 1a is opened in the sleeve 1, and a plurality of groups of circumferentially distributed descending swing assemblies 2 are arranged in the inner ring groove 1a. The descending swing assembly 2 is used to reduce the lateral deviation of the tubing. The descending swing assembly 2 includes a mounting frame 21, and a plurality of rotatably connected rollers 22 are installed on the mounting frame 21. An abutting rod 23 is fixedly installed on the surface of the mounting frame 21 facing away from the axis of the sleeve 1. The abutting rod 23 passes through a coaxial variable-diameter hole 1b opened in the sleeve 1. The coaxial variable-diameter hole 1b is arranged along the radial direction of the sleeve 1, and the coaxial variable-diameter hole 1b is a gradually changing structure with a decreasing aperture from inside to outside. A spring 25 is sleeved on the abutting rod 23. Specifically, a socket ring 24 is fixedly sleeved on the abutting rod 23. One end of the spring 25 is fixedly connected to the outer ring surface of the socket ring 24, and the other end of the spring 25 is fixedly connected to the inner hole wall of the coaxial variable-diameter hole 1b
[0029] The outer wall of the sleeve 1 is provided with a plurality of annularly distributed grooves 1d, and the grooves 1d correspond one-to-one to the swing-down components 2, a protective cover 3 is fixedly installed on each of the grooves 1d, and a pressure sensor 4 arranged opposite to the abutment rod 23 is fixedly installed inside the protective cover 3, a controller 5 for displaying the value of the pressure sensor 4 is installed on the protective cover 3, and an audible and visual alarm 6 is also installed on the protective cover 3.
[0030] It should be noted that: the oil pipe is passed through the sleeve 1 and inserted into the oil well. When the oil pipe passes through the roller 22 area in the sleeve 1, the outer wall of the oil pipe abuts against the roller 22, thereby driving the abutting rod 23 to slide outward toward the coaxial diameter-changing hole 1b, and then the spring 25 is compressed, and the roller 22 side of the multiple groups of sway reduction assemblies 2 abuts against the outer wall of the oil pipe, reducing the hidden dangers of lateral deviation and side sliding of the oil pipe. At the same time, the designed spring 25 can effectively eliminate the lateral deviation stress of part of the oil pipe.
[0031] When the oil pipe deviates to one side, the roller 22 in that direction is subjected to a large combined force, thereby driving the length of the rod section of the abutment rod 23 that slides into the protective cover 3 to become longer until the rubber abutment sleeve 231 abuts against the pressure sensor 4. The controller 5 can immediately display the pressure value of the oil pipe deviating to that direction. If the value displayed by the pressure sensor 4 exceeds the preset warning value, the sound and light alarm 6 can issue a warning, so that the staff can immediately know and quickly perform maintenance, which greatly reduces the wear of equipment and oil pipes and improves the safety of oil development.
[0032] Furthermore, two symmetrically distributed limit rods 26 are fixedly installed on the plate surface of the mounting frame 21 away from the axial direction of the sleeve 1, and the two limit rods 26 respectively pass through the two limit holes 1c opened in the sleeve 1 and are slidably connected to the limit holes 1c, so that when the oil pipe abuts against the roller 22, the limit rods 26 can improve the stability of the roller 22 sliding outward toward the inner ring groove 1a.
[0033] In addition, the rod head of the abutment rod 23 extends into the protective cover 3 and is fixedly mounted with a rubber abutment sleeve 231 for abutting the pressure sensor 4, thereby reducing the problem of damage to the contact area of the pressure sensor 4.
[0034] It is worth noting that in order to improve the corrosion resistance of the centralizer, the sleeve 1 and the protective cover 3 are made of stainless steel, thereby extending their service life.
[0035] The working principle of the wellhead tubing centralizer provided by the utility model is as follows:
[0036] Insert the tubing through the sleeve 1 and into the oil well. When the tubing passes through the area of the roller 22 in the sleeve 1, the outer wall of the tubing abuts against the roller 22, thereby driving the abutting rod 23 to slide outward from the coaxial variable-diameter hole 1b. As a result, the spring 25 is compressed, and the rollers 22 of multiple sets of swing-down components 2 abut against the outer wall of the tubing, reducing the risk of the tubing deflecting or slipping sideways. At the same time, the designed spring 25 can effectively eliminate some of the side deflection stress of the tubing.
[0037] When the tubing deflects to one side, the roller 22 in this direction receives a relatively large resultant force, which drives the length of the rod section of the abutting rod 23 sliding into the protective cover 3 to become longer until the rubber abutting sleeve head 231 abuts against the pressure sensor 4. Then, its controller 5 can immediately display the pressure value of the tubing deflecting in this direction. When the value displayed by the pressure sensor 4 exceeds the pre-set warning value, the sound and light alarm 6 can give a warning, enabling the staff to immediately know and quickly carry out maintenance, greatly reducing the wear of the equipment and the tubing, and at the same time improving the safety of oil development.
[0038] The circuits and controls involved in this utility model are all prior arts and will not be elaborated here.
[0039] The above are only the embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of this utility model.
Claims
1. A tubing centralizer for wellhead, characterized in that, It includes a sleeve (1) with an inner annular groove (1a) formed therein, and multiple groups of annularly distributed swing-down components (2) are arranged in the inner annular groove (1a) to reduce the lateral deviation of the oil pipe through the swing-down components (2). The swing-down component (2) includes a mounting frame (21) on which a plurality of rotatably connected rollers (22) are mounted, and a contact rod (23) is fixedly mounted on the surface of the mounting frame (21) facing away from the axis of the sleeve (1). The contact rod (23) passes through a coaxial variable-diameter hole (1b) formed in the sleeve (1), and a spring (25) is sleeved on the contact rod (23). A plurality of annularly distributed grooves (1d) are formed in the outer wall of the sleeve (1), and the grooves (1d) correspond to the swing-down components (2) one by one. A protective cover (3) is fixedly mounted on each groove (1d), and a pressure sensor (4) opposite to the contact rod (23) is fixedly mounted in the protective cover (3).
2. The wellhead tubing centralizer according to claim 1, wherein, The coaxial variable-diameter hole (1b) is arranged along the radial direction of the sleeve (1), and the coaxial variable-diameter hole (1b) has a gradually changing structure with the aperture decreasing from inside to outside.
3. The wellhead tubing centralizer according to claim 2, wherein, A socket ring (24) is fixedly sleeved on the contact rod (23). One end of the spring (25) is fixedly connected to the outer ring surface of the socket ring (24), and the other end of the spring (25) is fixedly connected to the inner hole wall of the coaxial variable-diameter hole (1b).
4. The wellhead tubing centralizer according to claim 3, characterized in that, Two symmetrically distributed limiting rods (26) are fixedly mounted on the surface of the mounting frame (21) facing away from the axis of the sleeve (1). The two limiting rods (26) respectively pass through two limiting holes (1c) formed in the sleeve (1) and are slidably connected to the limiting holes (1c).
5. The wellhead tubing centralizer according to claim 1, wherein The rod head of the contact rod (23) extends into the protective cover (3) and is fixedly mounted with a rubber contact sleeve head (231) for contacting the pressure sensor (4).
6. The wellhead tubing centralizer according to claim 1, wherein A controller (5) for displaying the value of the pressure sensor (4) is mounted on the protective cover (3), and an audible and visual alarm (6) is also mounted on the protective cover (3).
7. The wellhead tubing centralizer according to claim 1, wherein A connecting flange (11) is fixedly mounted at the bottom of the sleeve (1), and a plurality of mounting holes (11a) are formed in the connecting flange (11).