Rigid spiral centralizer for oil well

Abstract

The utility model discloses a rigid spiral centralizer for an oil well, which comprises a main body assembly, a spiral centralizer and a spiral centralizer, the clamping assembly comprises a first groove, a second groove, a first through hole, a first locking rod, a second through hole, a second locking rod, a second arc-shaped clamping plate and a first arc-shaped clamping plate; the first groove is formed in one end of the sleeve, the second groove is formed in one end of the sleeve, the first through hole is formed in the side edge of the sleeve, the first locking rod is connected into the first through hole in a threaded mode, the second through hole is formed in the first locking rod, and the second locking rod is connected into the second through hole in a threaded mode. On one hand, the rigid spiral centralizer is put into a well along with an oil pipe, when a section of oil pipe is installed, one centralizer needs to be installed, firstly, the centralizer is arranged outside the oil pipe on the well in a sleeving mode, then the oil pipe is connected with the underground, and in the installation process, the centralizer needs to be held all the time to prevent the centralizer from falling off and affecting connection of two oil pipes; and safety accidents are also caused by errors.

Description

Technical Field

[0001] The utility model relates to the technical field of rigid spiral centralizers, in particular to a rigid spiral centralizer used for oil wells. Background Art

[0002] The rigid spiral centralizer used in oil wells is a device specially designed to keep the tubing or casing in the correct position during drilling. It is usually made of metal, with high rigidity and strength, and can resist the lateral pressure of the formation during drilling, prevent the tubing or casing from bending or twisting, and ensure that they remain on the predetermined track.

[0003] A rigid spiral centralizer is lowered into the well along with the oil pipe. When installing a section of oil pipe, a centralizer needs to be installed. First, the centralizer is put on the outside of the oil pipe on the well, and then the oil pipe is connected to the well. During the installation process, the centralizer needs to be held all the time to prevent it from falling, which will affect the connection of the two oil pipes. On the other hand, safety accidents may also be caused by mistakes. Therefore, it is necessary to provide a rigid spiral centralizer for oil wells to prevent the centralizer from falling and reduce the labor intensity of workers. Utility Model Content

[0004] The purpose of the utility model is to provide a rigid spiral centralizer for oil wells, so as to solve the problem raised in the above-mentioned background technology that the rigid spiral centralizer is lowered into the well along with the oil pipe. When installing a section of the oil pipe, a centralizer needs to be installed. First, the centralizer is put on the outside of the oil pipe on the well, and then the oil pipe is connected to the well. During the installation process, the centralizer needs to be supported all the time to prevent it from falling, which affects the connection of the two oil pipes. On the other hand, it may also cause safety accidents due to mistakes.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0006] The utility model is a rigid spiral centralizer for oil wells, comprising:

[0007] a main body assembly, the main body assembly comprising a sleeve;

[0008] A clamping assembly, the clamping assembly comprising a first groove, a second groove, a first through hole, a first locking rod, a second through hole, a second locking rod, a second arc-shaped clamping plate and a first arc-shaped clamping plate;

[0009] The first groove is opened on the side of one end of the sleeve, the second groove is opened on the side of one end of the sleeve, the first through hole is opened on the side of the sleeve and passes through the second groove, the first locking rod is screwed in the first through hole, the second through hole is opened in the first locking rod, the second locking rod is screwed in the second through hole, the second arc-shaped clamping plate is rotatably connected to the second locking rod, and the first arc-shaped clamping plate is formed in one step and connected to the second arc-shaped clamping plate.

[0010] Furthermore, the second groove is located on a side of the first groove, and the second groove is located on an inner side of the sleeve.

[0011] Furthermore, the first arc-shaped clamping plate is fitted on the first groove, and the second arc-shaped clamping plate is fitted on the second groove.

[0012] Furthermore, there are two groups of clamping components, which are respectively located at two ends of the sleeve and are centrally symmetrical.

[0013] Furthermore, the main body component also includes spiral ribs, and there are six spiral ribs in total, which are welded to the outside of the sleeve and evenly distributed.

[0014] Further, it also includes a damage prevention component;

[0015] The anti-damage assembly includes a protective cover, a connecting shaft, a torsion spring and a fixing plate;

[0016] The fixing plate is fixed on the side of the sleeve, the connecting shaft is rotatably connected to the fixing plate, the protective cover is fixed on both ends of the connecting shaft, the torsion spring is sleeved on the connecting shaft, one end of the torsion spring is fixed on the connecting shaft, and the other end is fixed on the fixing plate.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The utility model, through the setting of the clamping assembly, sleeves the casing on the oil pipe to be installed in the well, twists the first locking rod in the first through hole, and then twists the second locking rod in the second through hole, driving the second arc-shaped clamping plate and the first arc-shaped clamping plate away from the second groove and the first groove, gradually approaching the oil pipe until the oil pipe is firmly pressed against the oil pipe. At this time, the well oil pipe can be connected to the downhole oil pipe. This setting can reduce the labor intensity of workers who continuously hold the casing by hand, and avoid the occurrence of safety accidents.

[0019] 2. The utility model, through the anti-damage component set up, the casing is sleeved on the oil pipe, and the protective cover is flipped around the fixed plate, driving the connecting shaft to rotate around the fixed plate. At this time, the first locking rod and the second locking rod can be twisted to clamp the oil pipe, and then the protective cover is loosened. Under the action of the torsion spring, the protective cover covers the casing. When the oil pipe is installed, the protective cover is opened, and the first locking rod and the second locking rod are rotated in reverse order in turn to drive the first arc-shaped clamping plate and the second arc-shaped clamping plate back into the first groove and the second groove, and then the protective cover is loosened. Under the action of the torsion spring, the protective cover is closed. This setting can protect the first locking rod to prevent the first locking rod from being worn when the casing moves with the oil pipe in the well, making the clamping assembly unusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the position of the clamping assembly of the utility model;

[0023] Figure 3 This is a schematic diagram of the positions of the first groove and the second groove of the utility model;

[0024] Figure 4 It is a partial structural schematic diagram of the clamping assembly of the utility model;

[0025] Figure 5 A schematic structural diagram of the anti-damage component of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 10. Sleeve; 11. Spiral edge; 20. First groove; 21. Second groove; 22. First through hole; 23. First locking rod; 24. Second through hole; 25. Second locking rod; 26. Second arc-shaped clamping plate; 27. First arc-shaped clamping plate; 30. Protective cover; 31. Connecting shaft; 32. Torsion spring; 33. Fixing plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1-4 As shown, this embodiment is a rigid spiral centralizer for oil wells, comprising:

[0032] A main body component, the main body component includes a sleeve 10;

[0033] The casing 10 plays a supporting role;

[0034] A clamping assembly, the clamping assembly includes a first groove 20, a second groove 21, a first through hole 22, a first locking rod 23, a second through hole 24, a second locking rod 25, a second arc-shaped clamping plate 26 and a first arc-shaped clamping plate 27;

[0035] The first groove 20 is provided on the side of one end of the sleeve 10, the second groove 21 is provided on the side of one end of the sleeve 10, the first through hole 22 is provided on the side of the sleeve 10 and passes through the second groove 21, the first locking rod 23 is screwed in the first through hole 22, the second through hole 24 is provided in the first locking rod 23, the second locking rod 25 is screwed in the second through hole 24, the second arc clamping plate 26 is rotatably connected to the second locking rod 25, and the first arc clamping plate 27 is formed in one step and connected to the second arc clamping plate 26;

[0036] The first groove 20 and the second groove 21 have a receiving function, the first through hole 22 has a connecting and adjusting function, the first locking rod 23 has an adjusting function, the second through hole 24 has a connecting and adjusting function, the second locking rod 25 has an adjusting function, and the second arc-shaped clamping plate 26 and the first arc-shaped clamping plate 27 have a clamping function;

[0037] The second groove 21 is located at the side of the first groove 20, and the second groove 21 is located at the inner side of the sleeve 10;

[0038] The first arc-shaped clamping plate 27 is attached to the first groove 20, and the second arc-shaped clamping plate 26 is attached to the second groove 21;

[0039] The first arc-shaped clamping plate 27 fits the first groove 20 and is located outside the second arc-shaped clamping plate 26, so as to reduce the impact deformation thereof during movement;

[0040] There are two groups of clamping components, which are located at both ends of the sleeve 10 and are centrally symmetrical;

[0041] The main body assembly also includes a spiral rib 11, and there are six spiral ribs 11, which are welded to the outside of the sleeve 10 and evenly distributed;

[0042] The spiral edge 11 plays a role of limiting and can also generate a swirling effect to promote the flow of the entire fluid.

[0043] Working principle:

[0044] Put the casing 10 on the oil pipe to be installed in the well, turn the first locking rod 23 in the first through hole 22, and then turn the second locking rod 25 in the second through hole 24, so as to drive the second arc-shaped clamping plate 26 and the first arc-shaped clamping plate 27 away from the second groove 21 and the first groove 20, and gradually approach the oil pipe until it is firmly against the oil pipe. At this time, the oil pipe in the well can be connected to the oil pipe downhole.

[0045] This step can reduce the labor intensity of workers who continuously hold the sleeve 10 by hand, thus avoiding the occurrence of safety accidents.

[0046] See also Figure 5 This embodiment is based on the above embodiment and further includes:

[0047] The anti-damage component includes a protective cover 30, a connecting shaft 31, a torsion spring 32 and a fixing plate 33;

[0048] The fixing plate 33 is fixed to the side of the sleeve 10, the connecting shaft 31 is rotatably connected to the fixing plate 33, the protective cover 30 is fixed to both ends of the connecting shaft 31, and the torsion spring 32 is sleeved on the connecting shaft 31, with one end fixed to the connecting shaft 31 and the other end fixed to the fixing plate 33;

[0049] The protective cover 30 plays a protective role and is arranged in an arc shape to reduce the resistance during movement. The connecting shaft 31 plays a connecting role, the torsion spring 32 has a reset function, and the fixing plate 33 plays a fixing role.

[0050] Working principle:

[0051] Put the casing 10 on the oil pipe, flip the protective cover 30 around the fixing plate 33, drive the connecting shaft 31 to rotate around the fixing plate 33, then turn the first locking rod 23 and the second locking rod 25 to clamp the oil pipe, then loosen the protective cover 30, and under the action of the torsion spring 32, the protective cover 30 covers the casing 10;

[0052] When the oil pipe is installed, open the protective cover 30, rotate the first locking rod 23 and the second locking rod 25 in reverse order, drive the first arc clamping plate 27 and the second arc clamping plate 26 back to the first groove 20 and the second groove 21, and then release the protective cover 30, and under the action of the torsion spring 32, the protective cover 30 is closed.

[0053] This step can protect the first locking rod 23 to prevent the first locking rod 23 from being worn when the casing 10 moves with the oil pipe in the well, thereby preventing the clamping assembly from being unusable.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rigid spiral centralizer for oil wells, characterized in that: include: A main body component, the main body component comprising a sleeve (10); A clamping assembly, the clamping assembly comprising a first groove (20), a second groove (21), a first through hole (22), a first locking rod (23), a second through hole (24), a second locking rod (25), a second arc-shaped clamping plate (26) and a first arc-shaped clamping plate (27); The first groove (20) is provided on the side of one end of the sleeve (10), the second groove (21) is provided on the side of one end of the sleeve (10), the first through hole (22) is provided on the side of the sleeve (10) and passes through the second groove (21), the first locking rod (23) is screwed into the first through hole (22), the second through hole (24) is provided in the first locking rod (23), the second locking rod (25) is screwed into the second through hole (24), the second arc clamping plate (26) is rotatably connected to the second locking rod (25), and the first arc clamping plate (27) is connected to the second arc clamping plate (26) by one-step molding.

2. A rigid spiral centralizer for oil wells according to claim 1, characterized in that: The second groove (21) is located on the side of the first groove (20), and the second groove (21) is located on the inner side of the sleeve (10).

3. A rigid spiral centralizer for oil wells according to claim 1, characterized in that: The first arc-shaped clamping plate (27) is fitted on the first groove (20), and the second arc-shaped clamping plate (26) is fitted on the second groove (21).

4. A rigid spiral centralizer for oil wells according to claim 1, characterized in that: There are two groups of clamping components, which are respectively located at two ends of the sleeve (10) and are centrally symmetrical.

5. The rigid spiral centralizer for oil wells according to claim 1, characterized in that: The main body component also includes spiral ribs (11), and there are six spiral ribs (11) in total, which are welded to the outside of the sleeve (10) and are evenly distributed.

6. A rigid spiral centralizer for oil wells according to claim 1, characterized in that: Also included are loss prevention components; The anti-damage assembly comprises a protective cover (30), a connecting shaft (31), a torsion spring (32) and a fixing plate (33); The fixing plate (33) is fixed on the side of the sleeve (10), the connecting shaft (31) is rotatably connected to the fixing plate (33), the protective cover (30) is fixed on both ends of the connecting shaft (31), and the torsion spring (32) is sleeved on the connecting shaft (31), with one end fixed on the connecting shaft (31) and the other end fixed on the fixing plate (33).

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