Rotational flow centralizer for petroleum well cementation

Abstract

The utility model relates to the technical field of petroleum well cementation, in particular to a rotational flow centralizer for petroleum well cementation, which comprises two fixing screws and two semi-circular bodies, each fixing screw is provided with a knob and two limiting rings, two ends of one semi-circular body are provided with first extension plates, each first extension plate is provided with a thread bushing and two positioning holes, and the two semi-circular bodies are provided with second extension plates. The two ends of one semicircular body are each provided with a first extension plate, the two ends of the other semicircular body are each provided with a second extension plate, each second extension plate is provided with a through hole and two positioning rods, and the outer sides of the two semicircular bodies are each provided with a plurality of rotational flow blades. When the two semi-circular bodies are in butt joint, the fixing screw rod is screwed into the threaded sleeve, the two semi-circular bodies are in butt joint under the action of the threads, the operation mode does not need intervention of multiple persons, and butt joint of the centralizer can be completed only by one person.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum cementing, in particular to a cyclone centralizer for petroleum cementing. Background Art

[0002] During the completion process of drilling, especially in directional wells, horizontal wells and extended reach wells, a centralizer is an essential device. The centralizer centers the casing in the wellbore, which not only reduces friction during the casing installation process but also ensures a uniform annular gap between the casing and the wellbore wall.

[0003] The prior art patent CN202323531451.1 discloses a vortex centralizer for oil well cementing, comprising a centralizer body, wherein the centralizer body comprises two centrally symmetrical pieces, the two centralizer bodies facing each other and enclosing and fixed on the outer circumference of the drill pipe, the outer wall of the centralizer body after enclosing is evenly provided with vortex blades, and two groups of sleeve rods are symmetrically provided, the inner cavity of the sleeve rods is respectively provided with a shock-absorbing spring, the outer ends of the sleeve rods are respectively covered with sleeve rod end covers, and a push rod is respectively inserted into the center hole of each sleeve rod end cover, and the inner end of each push rod located in the inner cavity of the sleeve rod is respectively provided with a push rod large diameter end, and the large diameter end of each push rod is respectively pressed on the corresponding shock-absorbing spring; the outer end of each push rod is respectively welded to the concave center of the arc-shaped support plate; the vortex centralizer for oil well cementing has a disassembly mechanism, which is convenient for workers to put it on the outer circumference of the pipe string, and the disassembly is convenient and quick, with low vibration and long service life.

[0004] However, in the above-mentioned prior art, since the centralizer needs the cooperation of multiple people to install the centralizer on the pipe when docking, this installation method not only wastes manpower, but also requires the workers to press the centralizer hard during the installation process to make the tenon completely enter the slot, thereby increasing the labor intensity of the workers. Utility Model Content

[0005] The purpose of the utility model is to provide a cyclone centralizer for oil well cementing, aiming to solve the technical problem in the prior art that, when the centralizer is docked, it requires the cooperation of multiple people to install the centralizer on the pipeline. This installation method not only wastes manpower, but also requires the workers to press the centralizer hard during the installation process to make the tenon fully enter the slot, thereby increasing the labor intensity of the workers.

[0006] To achieve the above-mentioned purpose, the utility model adopts a vortex straightener for oil cementing, including two fixed screws and two semicircular bodies, the fixed screws are provided with a knob and two limit rings, one of the semicircular bodies is provided with a first extension plate at both ends, the first extension plate is provided with a threaded sleeve and two positioning holes, the other semicircular body is provided with a second extension plate at both ends, the second extension plate is provided with a through hole and two positioning rods, the outer sides of the two semicircular bodies are provided with multiple vortex blades, the two fixed screws are respectively rotatably connected to the corresponding second extension plates and are located in the through holes, and the two limit rings are respectively abutted against the two end surfaces of the second extension plate, the two fixed screws are respectively threadedly connected to the corresponding threaded sleeves and are located in the threaded sleeves, and the two positioning rods are respectively slidably set in the corresponding positioning holes.

[0007] Wherein, a supporting pad is provided at the joint of the two semicircular bodies, a buffer pad is provided on the inner side of the two semicircular bodies, and the number of the buffer pads is multiple.

[0008] Wherein, the knob is located at one end of the fixing screw, the two limiting rings are located in the middle of the fixing screw, the threaded sleeve is located between the two positioning holes, and the through hole is located between the two positioning rods.

[0009] Among them, the vortex straightener for oil cementing also includes two mud guard mechanisms, the mud guard mechanism includes a mud guard and multiple shock-absorbing components, the shock-absorbing components include a connecting rod, a shock-absorbing spring and a sleeve, the mud guard is fixedly connected to the connecting rod and is located on the connecting rod, the connecting rod is slidingly connected to the sleeve and is located in the sleeve, the shock-absorbing spring is arranged in the sleeve and is supported between the connecting rod and the sleeve, the sleeve is fixedly connected to the corresponding semicircular body, and is located on the outside of the semicircular body, and is also located between the multiple vortex blades.

[0010] Wherein, an auxiliary fender is provided on one side of each of the first extension plate and the second extension plate, and the auxiliary fender is arc-shaped and maintains the same curvature as the fender.

[0011] The utility model discloses a swirl centralizer for oil well cementing, comprising two fixed screws and two semicircular bodies, wherein the fixed screws are provided with a knob and two limit rings, wherein both ends of one of the semicircular bodies are provided with a first extension plate, wherein the first extension plate is provided with a threaded sleeve and two positioning holes, and both ends of the other semicircular body are provided with a second extension plate, wherein the second extension plate is provided with a through hole and two positioning rods, and multiple swirl blades are provided on the outer sides of the two semicircular bodies. By splitting the centralizer into the two semicircular bodies, and then providing the threaded sleeve and the fixed screw, the centralizer is provided with a through hole. The positioning rod plays a positioning role. When the two semicircular bodies are docked, the fixing screw is screwed into the threaded sleeve to make the two semicircular bodies docked under the action of the thread. This operation method does not require the intervention of multiple people, and only one person is needed to complete the docking of the centralizer. In this way, the technical problem that when the centralizer is docked, multiple people are required to cooperate to install the centralizer on the pipeline is solved. This installation method not only wastes manpower, but also requires the staff to press the centralizer hard during the installation process to make the tenon completely enter the slot, thereby increasing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a three-dimensional stereogram of the present utility model.

[0014] Figure 2 It is the main view of the present utility model.

[0015] Figure 3 This utility model Figure 2 Sectional view along line AA.

[0016] Figure 4 This utility model Figure 2 Cross-sectional view along line BB.

[0017] 1-fixing screw, 2-semicircular body, 3-knob, 4-limiting ring, 5-first extension plate, 6-through hole, 7-positioning hole, 8-second extension plate, 9-threaded sleeve, 10-positioning rod, 11-swirl blade, 12-holding pad, 13-buffer pad, 14-mudguard, 15-connecting rod, 16-shock-absorbing spring, 17-sleeve, 18-auxiliary mudguard. DETAILED DESCRIPTION

[0018] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] See also Figures 1 to 4 The utility model provides a vortex centralizer for oil well cementing, comprising two fixed screws 1 and two semicircular bodies 2, wherein the fixed screws 1 are provided with a knob 3 and two limiting rings 4, wherein both ends of one of the semicircular bodies 2 are provided with a first extension plate 5, wherein the first extension plate 5 is provided with a threaded sleeve 9 and two positioning holes 7, and both ends of the other semicircular body 2 are provided with a second extension plate 8, wherein the second extension plate 8 is provided with a through hole 6 and two positioning rods 10, and a plurality of swirl blades 11 are provided on the outer sides of the two semicircular bodies 2, the two fixed screws 1 are respectively rotatably connected to the second extension plate 8 and are located in the through holes 6, and the two limiting rings 4 are respectively held against the two end surfaces of the second extension plate 8, the two fixed screws 1 are respectively threadedly connected to the threaded sleeve 9 and are located in the threaded sleeve The sleeve 9 is provided with two positioning rods 10 which are respectively slidably arranged in the corresponding positioning holes 7. By splitting the centralizer into the two semicircular bodies 2, and then arranging the threaded sleeve 9 and the fixing screw 1, the positioning rod 10 plays a positioning role. When the two semicircular bodies 2 are docked, the fixing screw 1 is screwed into the threaded sleeve 9, so that the two semicircular bodies 2 are docked under the action of the thread. This operation method does not require the intervention of multiple people, and only one person is needed to complete the docking of the centralizer. In this way, the technical problem that the centralizer needs the cooperation of multiple people to be installed on the pipeline when docking is solved, and this installation method not only wastes manpower, but also requires the staff to press the centralizer hard during the installation process to make the tenon completely enter the slot, thereby increasing the labor intensity of the staff.

[0020] Among them, the two semicircular bodies 2 are each provided with a supporting pad 12 at the joint, and the inner side of the two semicircular bodies 2 is provided with a buffer pad 13, and the number of the buffer pads 13 is multiple. The supporting pad 12 can facilitate the docking of the two semicircular bodies 2, play a protective role, and prevent the two semicircular bodies 2 from contacting each other and causing deformation. At the same time, the buffer pad 13 can facilitate the protection of the pipeline that needs to be straightened.

[0021] Secondly, the knob 3 is located at one end of the fixing screw 1 , the two limiting rings 4 are located in the middle of the fixing screw 1 , the threaded sleeve 9 is located between the two positioning holes 7 , and the through hole 6 is located between the two positioning rods 10 .

[0022] Again, the cyclone centralizer for oil well cementing also includes two mud guard mechanisms, the mud guard mechanism includes a mud guard 14 and a plurality of shock absorbing components, the shock absorbing components include a connecting rod 15, a shock absorbing spring 16 and a sleeve 17, the mud guard 14 is fixedly connected to the connecting rod 15 and is located on the connecting rod 15, the connecting rod 15 is slidably connected to the sleeve 17 and is located in the sleeve 17, the shock absorbing spring 16 is arranged in the sleeve 17 and is held between the connecting rod 15 and the sleeve 17, the sleeve 17 is fixedly connected to the corresponding semicircular body 2 and is located in the semicircular body. The outer side of the semicircular body 2 and is also located between the multiple swirl blades 11. The mud can be blocked by the mud guard, thereby reducing the mud retention between the connecting rod 15 and the sleeve 17, further improving the service life of the device. When the pipeline vibrates during operation, the vibration will be transmitted to the sleeve 17 through the semicircular body 2. The sleeve 17 vibrates, causing the sleeve 17 to slide on the outer side of the connecting rod 15. At this time, the shock-absorbing spring 16 alleviates the vibration through the elastic deformation characteristics, thereby greatly improving the shock-absorbing effect of the device when it is working, and increasing the service life of the pipeline and the device.

[0023] In addition, an auxiliary fender 18 is provided on one side of the first extension plate 5 and the second extension plate 8. The auxiliary fender 18 is arc-shaped and maintains the same curvature as the fender 14. The auxiliary fender 18 can facilitate the shielding of mud at both ends of the centralizer.

[0024] When using the present invention, the fixing screw 1 is completely separated from the threaded sleeve 9, and the two semicircular bodies 2 are pulled apart under the action of the two positioning rods 10, and then the two semicircular bodies 2 are put on the pipe. First, one of the fixing screws 1 is screwed into the sleeve opening of the threaded sleeve 9, and then the other fixing screw 1 is screwed into the sleeve opening of the threaded sleeve 9. Then, the fixing screws 1 are rotated alternately to slowly dock the two semicircular bodies 2 until the two fixing screws 1 are difficult to rotate. The operation method of this design does not require the intervention of multiple people, and only one person is needed to complete the docking of the centralizer. The swirl blades 11 described in this article can guide and clear the mud to avoid mud blockage. In this way, the technical problem that the centralizer needs multiple people to cooperate to install the centralizer on the pipe when docking is solved, which not only wastes manpower, but also requires the staff to press the centralizer hard during the installation process to make the tenon completely enter the slot, thereby increasing the labor intensity of the staff.

[0025] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. A cyclone centralizer for oil well cementing, characterized in that: The invention comprises two fixing screws and two semicircular bodies, wherein the fixing screws are provided with a knob and two limiting rings, wherein both ends of one of the semicircular bodies are provided with a first extension plate, and the first extension plate is provided with a threaded sleeve and two positioning holes, and both ends of the other semicircular body are provided with a second extension plate, and the second extension plate is provided with a through hole and two positioning rods, and multiple swirl blades are provided on the outer sides of the two semicircular bodies, the two fixing screws are respectively rotatably connected to the corresponding second extension plates and are located in the through holes, and the two limiting rings are respectively held against the two end surfaces of the second extension plate, the two fixing screws are respectively threadedly connected to the corresponding threaded sleeves and are located in the threaded sleeves, and the two positioning rods are respectively slidably provided in the corresponding positioning holes.

2. The cyclone centralizer for oil well cementing according to claim 1, characterized in that: Abutment pads are provided at the joints of the two semicircular bodies, and buffer pads are provided on the inner sides of the two semicircular bodies, and the number of the buffer pads is multiple.

3. The cyclone centralizer for oil well cementing according to claim 2, characterized in that: The knob is located at one end of the fixing screw, the two limiting rings are located in the middle of the fixing screw, the threaded sleeve is located between the two positioning holes, and the through hole is located between the two positioning rods.

4. The cyclone centralizer for oil well cementing according to claim 3, characterized in that: The vortex centralizer for oil cementing also includes two mud guard mechanisms, which include mud guards and multiple shock-absorbing assemblies. The shock-absorbing assemblies include a connecting rod, a shock-absorbing spring and a sleeve. The mud guard is fixedly connected to the connecting rod and is located on the connecting rod. The connecting rod is slidably connected to the sleeve and is located in the sleeve. The shock-absorbing spring is arranged in the sleeve and is supported between the connecting rod and the sleeve. The sleeve is fixedly connected to the corresponding semicircular body and is located on the outside of the semicircular body, and is also located between the multiple vortex blades.

5. The cyclone centralizer for oil well cementing according to claim 4, characterized in that: An auxiliary fender is provided on one side of each of the first extension plate and the second extension plate, and the auxiliary fender is arc-shaped and maintains the same curvature as the fender.

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