CN219795176U - Roller centralizer for rotary well cementation - Google Patents
Roller centralizer for rotary well cementation Download PDFInfo
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- CN219795176U CN219795176U CN202322411973.1U CN202322411973U CN219795176U CN 219795176 U CN219795176 U CN 219795176U CN 202322411973 U CN202322411973 U CN 202322411973U CN 219795176 U CN219795176 U CN 219795176U
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- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a roller centralizer for rotary well cementation, which belongs to the technical field of oilfield logging tools and comprises a centralizer, a first fixing plate and a second fixing plate, wherein clamping mechanisms are fixedly connected to the top and the bottom of the centralizer. When the novel well cementation device is used, according to the diameter of a well cementation in actual conditions, the threaded rod is fixedly connected with the first clamping sleeve through the limiting hole of the first fixing plate, the threaded rod is rotated again, so that the first clamping sleeve and the second clamping sleeve are both close to the middle, the sleeve is clamped, the nut sleeve is sleeved on the outer circular surface of the threaded rod and is tightly rotated, the centralizer is fixedly arranged on the sleeve, and the problems that the centralizer is unreasonable in configuration or too little in configuration, friction is greatly increased, the sleeve is required to be lowered in place under additional downward pressure, a groove is formed in a well wall due to a key groove, leakage is caused, even drilling is blocked, and maintenance cost is high are solved.
Description
Technical Field
The utility model relates to the technical field of oilfield logging tools, in particular to a roller centralizer for rotary well cementation.
Background
The rotary casing cementing technology is one of the most advanced cementing technology at home and abroad, and the application of the technology can greatly improve the displacement efficiency and effectively improve the cementing quality.
Most of the existing roller centralizers are designed by directly punching the outer wall of the centralizer body, and then the roller assemblies are arranged in the centralizer body, so that the strength of the centralizer body is reduced, the centralizer body is easily damaged under high-strength operation, and once the centralizer is damaged, the whole centralizer is possibly replaced, so that unnecessary waste is caused;
the prior patent (bulletin number: CN 215213367U) roller centralizer comprises a centralizer body, wherein a threaded hole is formed in the top end of the centralizer body, the bottom of the centralizer body is conical, an auxiliary sleeve is sleeved at a lever arm in the middle of the centralizer body, rolling assemblies are arranged in the auxiliary sleeve in a central symmetry mode, each rolling assembly comprises a fixed plate, a rotating wheel is arranged in the middle of each fixed plate, the device is sleeved on the outer wall of the centralizer body by adopting the auxiliary sleeve when in use, then the rolling assemblies are arranged in the auxiliary sleeve, so that the hole is not required to be formed in the centralizer body, the strength of the centralizer body is guaranteed, meanwhile, the auxiliary sleeve can be removed, the roller can be conveniently detached and replaced when the roller is damaged, waste is reduced to a great extent, and the cost is saved.
Aiming at the problems, the prior patent provides a solution, but when the well cementation with different diameters is carried out, the friction is greatly increased due to unreasonable configuration of the centralizer or too little casing running, the casing and the joint hoop can increase the friction, so that the casing is put in place by additional pressing force, the key slot can cause the well wall to form a groove, leakage and even drilling sticking are caused, and the maintenance cost is high.
For this purpose, a roller centralizer for rotary cementing is proposed.
Disclosure of Invention
The utility model aims to provide a roller centralizer for rotary well cementation, which can be suitable for different sizes, and can solve the problems that when well cementations with different diameters are run down, friction resistance is greatly increased due to unreasonable configuration of the centralizer or too little running down, friction resistance is increased by a sleeve and a joint hoop, so that the sleeve is required to be run down in place under additional running pressure, a groove is formed by a key groove, leakage is caused, even drilling is blocked, and maintenance cost is high.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the roller centralizer for rotary well cementation comprises a centralizer, wherein a first fixing plate and a second fixing plate are fixedly connected to the two sides of the top and the bottom of the centralizer respectively, the shapes of the first fixing plate and the second fixing plate are semicircular, and clamping mechanisms are fixedly connected to the top and the bottom of the centralizer;
the clamping mechanism comprises a first clamping sleeve and a second clamping sleeve which are respectively and fixedly connected to the inner sides of a first fixing plate and a second fixing plate, the structures and functions of the first clamping sleeve and the second clamping sleeve are the same, but the positions of the first clamping sleeve and the second clamping sleeve are different, the outer circular surface of the first clamping sleeve is fixedly connected with a plurality of limiting sleeves, the limiting sleeve at the middle part of the first clamping sleeve is rotationally connected with a threaded rod, and the threaded rod penetrates through the inner part of the first fixing plate and is rotationally connected with a nut sleeve.
Preferably, a plurality of spacing holes have all been seted up to the surface of first fixed plate, second fixed plate, the threaded rod runs through the spacing hole fixedly connected with first chucking cover of first fixed plate, the both ends of the outer disc of first chucking cover all rotate and are connected with the gag lever post, the gag lever post runs through the inside of first fixed plate.
Preferably, the outer circular surface of the limiting rod is provided with threads, the inner wall of the limiting sleeve is provided with a thread ring, and the limiting rod is in threaded connection with the limiting sleeve.
Preferably, the centralizer comprises a first semicircular sleeve, a second semicircular sleeve, a connecting plate and a threaded bolt, wherein threaded holes are formed in the top and the bottom of the first semicircular sleeve and the second semicircular sleeve, and the first semicircular sleeve is fixedly connected with the second semicircular sleeve through the connecting plate and the threaded bolt to form an integral centralizer.
Preferably, the top of crossing department of first semicircle cover, second semicircle cover all fixedly connected with connecting plate, the inside of connecting plate all rotates and is connected with the screw bolt, the screw bolt rotates and is connected in the screw hole of first semicircle cover, second semicircle cover.
Preferably, the outer circumference of the centralizer is provided with a clamping block fixedly connected with the circumference, the clamping block is convex in shape, a plurality of spring buckles are arranged on two sides of the outer surface of the clamping block, and the clamping block is fixedly connected with a rolling mechanism through the plurality of spring buckles.
Preferably, the rolling mechanism comprises a supporting frame fixedly connected to the outer surface of the clamping block, limiting grooves with the same size as the clamping block are formed in the supporting frame, a plurality of clamping holes are formed in two sides of the outer surface of the supporting frame, and the spring buckle penetrates through the clamping holes to enable the supporting frame to be fixedly sleeved on the outer surface of the clamping block.
Preferably, the inside of support frame is the interval and is equipped with horizontal groove, vertical groove, the inside in horizontal groove, vertical groove is rotated respectively and is connected with first gyro wheel, second gyro wheel.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the first fixing plate, the second fixing plate and the clamping mechanism are arranged, the threaded rod is firstly fixedly connected with the first clamping sleeve by penetrating through the limit hole of the first fixing plate according to the diameter of the well cementation in actual conditions, and the threaded rod is rotated again, so that the first clamping sleeve and the second clamping sleeve are both close to the middle, the sleeve is clamped, the nut sleeve is sleeved on the outer circular surface of the threaded rod and is tightly rotated, the centralizer is fixedly arranged on the sleeve, the problems that the friction is greatly increased due to unreasonable configuration or too little configuration of the centralizer, the sleeve and the joint hoop are increased, the sleeve is required to be lowered into place due to additional downward pressure, a groove is formed by a key groove, leakage is caused, even drilling is blocked, and the maintenance cost is high are solved;
2. the utility model is provided with the clamping blocks, the spring buckles and the rolling mechanism, and the rollers connected inside the centralizer are easy to damage and more complex to replace in the long-term use process of the centralizer, and at the moment, a plurality of clamping blocks can be arranged on the outer circular surface of the centralizer and are fixedly connected with the support frame by utilizing the plurality of spring buckles, so that the whole support frame is convenient to install or disassemble, and the operation of replacing the first roller and the second roller is simple and can be directly replaced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall structural view of the present utility model;
FIG. 2 is a split view of the centralizer of the utility model;
FIG. 3 is a schematic view of the clutch mechanism of the present utility model;
FIG. 4 is a bottom view of the present utility model;
fig. 5 is a schematic diagram showing the disconnection of the rolling mechanism according to the present utility model.
Reference numerals illustrate:
1. a centralizer; 11. a first half-round sleeve; 12. a second semi-circular sleeve; 13. a threaded hole; 14. a connecting plate; 15. a threaded bolt; 2. a first fixing plate; 3. a second fixing plate; 4. a limiting hole; 5. a clamping mechanism; 51. a first clamping sleeve; 52. a second clamping sleeve; 53. a threaded rod; 54. a nut sleeve; 55. a limit sleeve; 56. a limit rod; 6. a clamping block; 7. a spring buckle; 8. a rolling mechanism; 81. a support frame; 82. a limit groove; 83. a clamping hole; 84. a transverse slot; 85. a first roller; 86. a vertical groove; 87. and a second roller.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 5, the present utility model provides a technical solution:
the roller centralizer for rotary well cementation comprises a centralizer 1, wherein a first fixing plate 2 and a second fixing plate 3 are fixedly connected to the two sides of the top and the bottom of the centralizer 1 respectively, the shapes of the first fixing plate 2 and the second fixing plate 3 are semicircular, and a clamping mechanism 5 is fixedly connected to the top and the bottom of the centralizer 1;
the clamping mechanism 5 comprises a first clamping sleeve 51 and a second clamping sleeve 52 which are respectively and fixedly connected to the inner sides of the first fixing plate 2 and the second fixing plate 3, the first clamping sleeve 51 and the second clamping sleeve 52 are identical in structure and function, but different in setting positions, the outer circular surface of the first clamping sleeve 51 is fixedly connected with a plurality of limiting sleeves 55, the limiting sleeve 55 in the middle of the first clamping sleeve 51 is rotationally connected with a threaded rod 53, and the threaded rod 53 penetrates through the inner part of the first fixing plate 2 and is rotationally connected with a nut sleeve 54.
Specifically, as shown in fig. 1 and 3, the outer surfaces of the first fixing plate 2 and the second fixing plate 3 are provided with a plurality of limiting holes 4, the threaded rod 53 penetrates through the limiting holes 4 of the first fixing plate 2 and is fixedly connected with the first clamping sleeve 51, two ends of the outer circular surface of the first clamping sleeve 51 are rotatably connected with limiting rods 56, and the limiting rods 56 penetrate through the first fixing plate 2.
The inner wall of the limiting hole 4 is provided with threads, and the limiting hole 4 is arranged, so that when the limiting rod 56 passes through the limiting hole 4, the position of the limiting rod is limited, and the position of the first clamping sleeve 51 fixedly connected with the limiting rod cannot be changed after being clamped.
Specifically, as shown in fig. 1 and 3, the outer circumferential surface of the stop lever 56 is provided with threads, the inner wall of the stop collar 55 is provided with a thread ring, and the stop lever 56 is in threaded connection with the stop collar 55.
Specifically, as shown in fig. 1, 2 and 4, the centralizer 1 includes a first semicircular sleeve 11, a second semicircular sleeve 12, a connecting plate 14 and a threaded bolt 15, wherein threaded holes 13 are formed at both ends of the top and bottom of the first semicircular sleeve 11 and the second semicircular sleeve 12, and the first semicircular sleeve 11 is fixedly connected with the second semicircular sleeve 12 through the connecting plate 14 and the threaded bolt 15 to form an integral centralizer 1.
Through setting up first semicircle cover 11, second semicircle cover 12, connecting plate 14, threaded bolt 15 for whole centralizer 1 is detachable, thereby makes and carries out quick equipment to centralizer 1, does not need spending too much time, consequently makes the staff can practice thrift a large amount of time when carrying out the dismouting, thereby has reached the effect that improves dismouting efficiency.
Specifically, as shown in fig. 1, 2 and 4, the top ends of the intersections of the first semi-circular sleeve 11 and the second semi-circular sleeve 12 are fixedly connected with a connecting plate 14, the inside of the connecting plate 14 is rotatably connected with a threaded bolt 15, and the threaded bolt 15 is rotatably connected in the threaded holes 13 of the first semi-circular sleeve 11 and the second semi-circular sleeve 12.
The first semicircular sleeve 11 and the second semicircular sleeve 12 are sleeved on the outer circular surface of the sleeve, and are fixedly connected through the threaded bolt 15 and the connecting plate 14, so that the formed integral centralizer 1 is sleeved on the sleeve, at the moment, according to the diameter of well cementation in actual conditions, the threaded rod 53 passes through the limiting hole 4 of the first fixing plate 2 to be fixedly connected with the first clamping sleeve 51, the threaded rod 53 is rotated again, the first clamping sleeve 51 and the second clamping sleeve 52 are both close to the middle, the sleeve is clamped, the nut sleeve 54 is sleeved on the outer circular surface of the threaded rod 53 and is tightly rotated, the centralizer 1 is fixedly installed on the sleeve, and the problems that the arrangement of the centralizer 1 is unreasonable or too little, friction resistance is greatly increased, friction resistance is increased by the sleeve and the joint hoop, the sleeve is required to be lowered into place by extra downward pressure, the key slot can cause the well wall to form a groove, leakage is caused, and even the drilling is blocked, and the maintenance cost is high are solved.
Specifically, as shown in fig. 1 and 5, the outer circumferential surface of the centralizer 1 is fixedly connected with a fixture block 6 in a circumferential arrangement, the shape of the fixture block 6 is convex, two sides of the outer surface of the fixture block 6 are provided with a plurality of spring buckles 7, and the fixture block 6 is fixedly connected with a rolling mechanism 8 through the plurality of spring buckles 7.
The spring buckle 7 is the existing structure, can make support frame 81 fixed connection on fixture block 6 surface through spring buckle 7, simultaneously when need dismantle support frame 81, only need press spring buckle 7 for accomodate in the inside storage section of thick bamboo of fixture block 6, can follow fixture block 6 with support frame 81 and take out.
Specifically, as shown in fig. 1 and 5, the rolling mechanism 8 includes a supporting frame 81 fixedly connected to the outer surface of the clamping block 6, a limiting groove 82 with the same size as the clamping block 6 is formed in the supporting frame 81, a plurality of clamping holes 83 are formed in two sides of the outer surface of the supporting frame 81, and the spring buckle 7 penetrates through the clamping holes 83 to enable the supporting frame 81 to be fixedly sleeved on the outer surface of the clamping block 6.
Specifically, as shown in fig. 1 and 5, the inside of the supporting frame 81 is provided with a transverse groove 84 and a vertical groove 86 at intervals, and the inside of the transverse groove 84 and the inside of the vertical groove 86 are respectively connected with a first roller 85 and a second roller 87 in a rotating manner.
Because centralizer 1's long-term in-process of using, its internal connection's gyro wheel is damaged easily, it is comparatively complicated to change, this moment the accessible sets up a plurality of fixture blocks 6 on centralizer 1's outer disc, and utilize a plurality of spring buckle 7 card in support frame 81's draw-in hole 83, make support frame 81 fixed connection, thereby conveniently install whole support frame 81, simultaneously when need dismantle support frame 81, only need press spring buckle 7, make accomodate in fixture block 6's inside storage section of thick bamboo, can follow fixture block 6 with support frame 81 and take out, and then make the operation that needs change first gyro wheel 85 and second gyro wheel 87 become simple, can directly change.
Through adopting above-mentioned technical scheme, when the well cementation to different diameter sizes is under the sleeve pipe, can be because of centralizer 1 configuration is unreasonable or down too little for friction increases by a wide margin, and sleeve pipe and festival hoop can increase friction, thereby need extra downforce to put the sleeve pipe in place, the keyway can cause the wall of a well to form the slot, causes the leakage, even blocks the brill, causes cost of maintenance high problem.
Working principle: when the novel well cementation device is used, according to the diameter of a well cementation in actual conditions, the threaded rod 53 passes through the limiting hole 4 of the first fixing plate 2 to be fixedly connected with the first clamping sleeve 51, the threaded rod 53 is rotated again, so that the first clamping sleeve 51 and the second clamping sleeve 52 are close to the middle, the sleeve is clamped, the nut sleeve 54 is sleeved on the outer circular surface of the threaded rod 53 and is tightly rotated, the centralizer 1 is fixedly arranged on the sleeve, the rotary well cementation work can be performed, meanwhile, the rollers connected inside the centralizer 1 are easy to damage and are relatively complex to replace in the long-term use process of the centralizer 1, a plurality of clamping blocks 6 can be arranged on the outer circular surface of the centralizer 1 and are fixedly connected with the supporting frame 81 by utilizing the plurality of spring clamps 7, so that the whole supporting frame 81 is convenient to install or detach, and the operation of replacing the first roller 85 and the second roller 87 is simple and can be directly replaced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. The utility model provides a rotatory well cementation is with gyro wheel centralizer, includes centralizer (1), its characterized in that: the top and bottom sides of the centralizer (1) are respectively and fixedly connected with a first fixing plate (2) and a second fixing plate (3), the shapes of the first fixing plate (2) and the second fixing plate (3) are semicircular arcs, and the top and bottom of the centralizer (1) are fixedly connected with a clamping mechanism (5);
the clamping mechanism (5) comprises a first clamping sleeve (51) and a second clamping sleeve (52) which are respectively and fixedly connected to the inner sides of a first fixing plate (2) and a second fixing plate (3), the structures and functions of the first clamping sleeve (51) and the second clamping sleeve (52) are identical, but the arranged positions of the first clamping sleeve and the second clamping sleeve are different, the outer circle surface of the first clamping sleeve (51) is fixedly connected with a plurality of limiting sleeves (55), the limiting sleeves (55) at the middle of the first clamping sleeve (51) are rotationally connected with threaded rods (53), and the threaded rods (53) penetrate through the inner portions of the first fixing plate (2) and are rotationally connected with nut sleeves (54).
2. The roller centralizer for rotary cementing of claim 1, wherein: the novel fixing device is characterized in that a plurality of limiting holes (4) are formed in the outer surfaces of the first fixing plate (2) and the second fixing plate (3), the threaded rod (53) penetrates through the limiting holes (4) of the first fixing plate (2) and is fixedly connected with a first clamping sleeve (51), limiting rods (56) are rotatably connected to the two ends of the outer circular surface of the first clamping sleeve (51), and the limiting rods (56) penetrate through the first fixing plate (2).
3. A rotary cementing roller centralizer as claimed in claim 2, wherein: the outer circular surface of the limiting rod (56) is provided with threads, the inner wall of the limiting sleeve (55) is provided with a thread ring, and the limiting rod (56) is in threaded connection with the limiting sleeve (55).
4. The roller centralizer for rotary cementing of claim 1, wherein: the centralizer (1) comprises a first semicircular sleeve (11), a second semicircular sleeve (12), a connecting plate (14) and a threaded bolt (15), threaded holes (13) are formed in the top and the bottom of the first semicircular sleeve (11) and the second semicircular sleeve (12), and the first semicircular sleeve (11) is fixed to the second semicircular sleeve (12) through the connecting plate (14) and the threaded bolt (15) to be connected and form the integral centralizer (1).
5. The rotary cementing roller centralizer of claim 4, wherein: the novel connecting plate is characterized in that connecting plates (14) are fixedly connected to the top ends of the intersecting parts of the first semicircular sleeve (11) and the second semicircular sleeve (12), threaded bolts (15) are rotatably connected to the inner parts of the connecting plates (14), and the threaded bolts (15) are rotatably connected to threaded holes (13) of the first semicircular sleeve (11) and the second semicircular sleeve (12).
6. The roller centralizer for rotary cementing of claim 1, wherein: the outer circumferential surface of the centralizer (1) is provided with a plurality of spring buckles (7), the outer circumferential surface of the centralizer (1) is provided with a plurality of clamping blocks (6), the clamping blocks (6) are in a convex shape, and the two sides of the outer surface of each clamping block (6) are provided with a plurality of spring buckles (7), and the clamping blocks (6) are fixedly connected with rolling mechanisms (8) through the plurality of spring buckles (7).
7. The rotary cementing roller centralizer of claim 6, wherein: the rolling mechanism (8) comprises a supporting frame (81) fixedly connected to the outer surface of the clamping block (6), limiting grooves (82) with the same size as the clamping block (6) are formed in the supporting frame (81), a plurality of clamping holes (83) are formed in two sides of the outer surface of the supporting frame (81), and the spring buckle (7) penetrates through the clamping holes (83) so that the supporting frame (81) is fixedly sleeved on the outer surface of the clamping block (6).
8. The rotary cementing roller centralizer of claim 7, wherein: the inside of support frame (81) is the interval and is equipped with horizontal groove (84), vertical groove (86), the inside in horizontal groove (84), vertical groove (86) is rotated respectively and is connected with first gyro wheel (85), second gyro wheel (87).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322411973.1U CN219795176U (en) | 2023-09-06 | 2023-09-06 | Roller centralizer for rotary well cementation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322411973.1U CN219795176U (en) | 2023-09-06 | 2023-09-06 | Roller centralizer for rotary well cementation |
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| CN219795176U true CN219795176U (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322411973.1U Active CN219795176U (en) | 2023-09-06 | 2023-09-06 | Roller centralizer for rotary well cementation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117888834A (en) * | 2024-03-18 | 2024-04-16 | 吉林省大多天盛金属陶瓷技术有限公司 | Oil rod anti-corrosion centralizer with side arm body adjusting function and method |
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2023
- 2023-09-06 CN CN202322411973.1U patent/CN219795176U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117888834A (en) * | 2024-03-18 | 2024-04-16 | 吉林省大多天盛金属陶瓷技术有限公司 | Oil rod anti-corrosion centralizer with side arm body adjusting function and method |
| CN117888834B (en) * | 2024-03-18 | 2024-05-10 | 吉林省大多天盛金属陶瓷技术有限公司 | Oil rod anti-corrosion centralizer with side arm body adjusting function and method |
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