Grading well cementation tool

Abstract

The utility model belongs to the technical field of well cementation equipment, and particularly relates to a grading well cementation tool which comprises a connecting sleeve, an upper connector and a lower connector, and the upper connector is fixedly connected to the outer wall of the top end of the connecting sleeve; through cooperative use of a pressing plate and a connecting rod, when grouting needs to be conducted, a hydraulic rod is used for moving a moving block, the moving block drives a sealing ring to move together during moving, the moving block moves to the position of a grouting hole, along with movement of the sealing ring, a sealing plate does not block a second communicating hole any more, and the grouting efficiency is improved. And when the sealing plate is separated from the pressing plate, the pressing plate can reset under the action of the first spring, the pressing plate is moved to the position close to the second communicating hole, the mortar is prevented from entering the bottom of the sealing groove, and therefore the stability of the well cementation tool in the using process is improved under the condition that the sealing performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the well cementing equipment technical field, and specifically relates to a hierarchical well cementing tool. BACKGROUND

[0002] The two-stage (hierarchical) well cementing process technology refers to a special well cementing tool, a hierarchical collar and various matched plugs, which are used to divide a long cement sealing well section into two sections for sealing, and the hierarchical well cementing is mainly a two-stage or multi-stage well cementing method used to prevent downhole lost cement slurry due to too long cement sealing section and well leakage.

[0003] According to the search, the utility model discloses a hierarchical collar for well cementing, and the technical scheme is disclosed in the technology, that is, a slurry hole is symmetrically arranged in the middle of the two sides of the fixed sleeve, an inlaying plate is symmetrically connected to the upper end of the inner side of the fixed sleeve, the lower end of the inlaying plate is slidably connected in the inlaying groove, and the like.

[0004] However, when the cement mortar is injected using the tool, the cement mortar is injected through the flow-through hole and the slurry outlet hole, in the process, the cement mortar passes through the inlaying groove and causes part of the cement mortar to be left in the bottom of the inlaying groove and cannot be discharged, which may block the inlaying plate when it enters the inlaying groove, affects the sealing performance at the position, and affects the stability of the tool during use.

[0005] To solve the above problems, the hierarchical well cementing tool is provided in the application. CONTENT OF THE UTILITY MODEL

[0006] To solve the problems in the background technology, the utility model provides the hierarchical well cementing tool, which has the characteristics of preventing cement mortar from being blocked.

[0007] To achieve the above object, the utility model provides the following technical scheme: hierarchical cementing tool, including connecting sleeve, upper joint and lower joint, the upper joint is fixedly connected on the outer wall of the connecting sleeve top end, the lower joint is fixedly connected on the inner wall of the connecting sleeve bottom, the connecting sleeve is provided with moving block, the outer wall of moving block is fixedly connected with sealing ring, the connecting sleeve is opened with grouting hole, the position close to grouting hole of sealing ring all is opened with second communication hole, the position close to second communication hole of sealing ring all is opened with sealing groove, the position close to second communication hole of moving block all is opened with first communication hole, the moving block is opened with flow guide groove, flow guide groove communicates with first communication hole, every sealing groove is provided with anti -blocking structure in;

[0008] The anti-blocking structure includes a pressing plate, the pressing plate is arranged at the bottom of the sealing groove, the bottom surface of the pressing plate is fixedly connected with a connecting rod, the sealing ring is provided with a through hole near the connecting rod, the connecting rod is arranged in the through hole, the bottom end of the connecting rod penetrates the through hole, the bottom end of the connecting rod is fixedly connected with a connecting plate, the top surface of the connecting plate is fixedly connected with a first spring, the top end of the first spring is fixedly connected to the bottom surface of the sealing ring, the inner wall of the connecting sleeve is fixedly connected with a sealing plate near the sealing groove, and the bottom end of the sealing plate is arranged in the sealing groove.

[0009] As the utility model hierarchical cementing tool is preferred, the bottom surface of the sealing ring is fixedly connected with a protective box near the first spring, and the connecting plate and the first spring are arranged in the protective box.

[0010] As the utility model hierarchical cementing tool is preferred, the bottom surface of the protective box is fixedly connected with a fixed plate, the top surface of the fixed plate is fixedly connected with a second spring, and the top end of the second spring is fixedly connected to the bottom surface of the connecting plate.

[0011] As the utility model hierarchical cementing tool is preferred, the top surface of the pressing plate is fixedly connected with a stopper, the stopper is arranged in the sealing groove, and the stopper is arranged on both sides of the second communication hole.

[0012] As the utility model hierarchical cementing tool is preferred, the bottom end of the sealing plate is arranged as a circular arc structure.

[0013] As the utility model hierarchical cementing tool is preferred, the top surface of the moving block is fixedly connected with a connecting seat, the top surface of the connecting seat is fixedly connected with a sleeve, the inner wall of the sleeve is provided with an internal thread, the connecting sleeve is provided with a hydraulic rod, the bottom end of the hydraulic rod is provided with an external thread, and the hydraulic rod is threadedly connected with the sleeve.

[0014] As the utility model hierarchical cementing tool preferably, the top surface of the casing is provided with a blocking ring, the blocking ring is fixedly connected on the outer wall of the hydraulic rod.

[0015] As the utility model hierarchical cementing tool preferably, the outer wall of the blocking ring is fixedly connected with a first flow guide plate.

[0016] As the utility model hierarchical cementing tool preferably, the inner wall of the top end position of the moving block is fixedly connected with a second flow guide plate.

[0017] Compared with the prior art, the utility model has the beneficial effects that: the anti-blocking structure is added on the application, the pressing plate and the connecting rod can be used in cooperation, when grouting is needed, the hydraulic rod is used to move the moving block, so that the moving block moves together with the sealing ring when moving, the moving block moves to the position of the grouting hole, with the movement of the sealing ring, the sealing plate no longer blocks the second communication hole, so that the mortar can be discharged through the grouting hole for cementing, and when the sealing plate is separated from the pressing plate, the pressing plate will be reset under the action of the first spring, so that the pressing plate moves to the position close to the second communication hole, preventing the mortar from entering the bottom of the sealing groove, thereby improving the stability of the cementing tool during use while ensuring the sealing property, and the second spring and the fixed plate are added at the same time, when the connecting plate moves towards the fixed plate, the second spring will change from the relaxed state to the compressed state, when the sealing plate is separated from the pressing plate, the second spring will have the same effect as the first spring, thereby preventing the first spring from being damaged and causing the tool to be unable to be used normally, and the service life of the cementing tool is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the sectional view of the utility model;

[0021] Figure 3 It is the partial structural schematic diagram of the utility model Figure 1 ;

[0022] Figure 4 It is the partial structural schematic diagram of the utility model Figure 3 ;

[0023] Figure 5 It is the partial structural schematic diagram of the utility model Figure 4 ;

[0024] Figure 6 In this utility model Figure 5 A schematic diagram of the first partial structure;

[0025] Figure 7 In this utility model Figure 5 A schematic diagram of the second local structure;

[0026] Figure 8 In this utility model Figure 7 A schematic diagram of a partial structure;

[0027] In the picture:

[0028] 1. Connecting sleeve; 11. Grouting hole; 2. Upper connector; 3. Lower connector; 4. Hydraulic rod; 41. Retaining ring; 42. First guide plate; 5. Moving block; 51. Guide groove; 52. First connecting hole; 6. Sealing ring; 61. Second connecting hole; 62. Sealing groove; 7. Anti-clogging structure; 71. Pressure plate; 72. Connecting rod; 73. Connecting plate; 74. First spring; 75. Protective box; 76. Second spring; 77. Fixing plate; 78. Stop block; 79. Sealing plate; 710. Through hole; 8. Connecting seat; 81. Sleeve; 9. Second guide plate. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] In the prior art, the existing cementing tool comprises a connecting sleeve 1, an upper joint 2 and a lower joint 3, the upper joint 2 is fixedly connected to the outer wall of the top end of the connecting sleeve 1, the lower joint 3 is fixedly connected to the inner wall of the bottom end of the connecting sleeve 1, a moving block 5 is arranged in the connecting sleeve 1, a sealing ring 6 is fixedly connected to the outer wall of the moving block 5, the connecting sleeve 1 is symmetrically provided with grouting holes 11, the position, close to the grouting holes 11, of the sealing ring 6 is provided with second communication holes 61, the position, close to the second communication holes 61, of the sealing ring 6 is provided with sealing grooves 62, the position, close to the second communication holes 61, of the moving block 5 is provided with first communication holes 52, the moving block 5 is provided with a flow guide groove 51, the flow guide groove 51 is communicated with the first communication holes 52, the moving plate and the sealing layer are pushed to move in the fixed sleeve, then the flow-through hole formed in the moving plate can be opposite to the grouting port formed in the fixed sleeve, then the grading collar can be grouted, thereby avoiding the use of drilling tools to drill the internal structure of the grading collar, and then the grading collar is not damaged in the cementing process, the overall strength of the grading collar is not affected, the grading collar can be normally used, and the probability of hidden troubles of the cementing quality of the grading collar is reduced.

[0032] The present application combines the above prior art, as shown in Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 , the utility model provides a technical scheme: grading cementing tool, every sealing groove 62 is provided with anti-blocking structure 7, anti-blocking structure 7 includes pressing plate 71, and pressing plate 71 is arranged at the bottom of sealing groove 62, and the bottom surface of pressing plate 71 is fixedly connected with connecting rod 72 in pairs of symmetry, and the position, close to connecting rod 72, of sealing ring 6 is provided with through hole 710, and connecting rod 72 is arranged in the close through hole 710 respectively, and the bottom end of connecting rod 72 penetrates through through hole 710, and the bottom end of connecting rod 72 is fixedly connected with connecting plate 73, and the top surface of connecting plate 73 is fixedly connected with first spring 74, and the top end of first spring 74 is fixedly connected to the bottom surface of sealing ring 6, and the position, close to sealing groove 62, of connecting sleeve 1 inner wall is fixedly connected with sealing plate 79, and the bottom end of sealing plate 79 is arranged in sealing groove 62.

[0033] In the embodiment, the moving block 5 is at a higher position without grouting, the bottom end of the sealing plate 79 is in contact with the pressing plate 71 and presses the pressing plate 71 down, the pressing plate 71 moves together with the connecting rod 72 when the pressing plate 71 moves, the connecting rod 72 moves together with the connecting plate 73, the first spring 74 is kept in a stretched state, the sealing plate 79 blocks the second communication hole 61, and the mortar is prevented from overflowing, when grouting is needed, the moving block 5 is moved, the moving block 5 moves together with the sealing ring 6 when the moving block 5 moves, the moving block 5 moves to the position of the grouting hole 11, the sealing plate 79 no longer blocks the second communication hole 61 when the sealing ring 6 moves, the mortar can be discharged through the grouting hole 11 to cement the well, and when the sealing plate 79 is separated from the pressing plate 71, the pressing plate 71 is reset under the action of the first spring 74, the pressing plate 71 moves to the position close to the second communication hole 61, the mortar is prevented from entering the bottom of the sealing groove 62, and the stability of the well cementing tool in use is improved while the sealing property is ensured.

[0034] Further,

[0035] As shown in Figure 5 , Figure 7 and Figure 8 ;

[0036] In combination with the above content,

[0037] In order to protect the first spring 74, in an optional embodiment, the bottom surface of the sealing ring 6 close to the position of the first spring 74 is fixedly connected with a protection box 75, and the connecting plate 73 and the first spring 74 are arranged in the protection box 75.

[0038] In the embodiment, the first spring 74 and the connecting plate 73 in the protection box 75 are protected by arranging the protection box 75.

[0039] Further,

[0040] As shown in Figure 1 , Figure 7 and Figure 8 ;

[0041] In combination with the above content,

[0042] In order to improve the service life of the anti-blocking structure 7, in an optional embodiment, the bottom surface of the protection box 75 is fixedly connected with a fixed plate 77, the top surface of the fixed plate 77 is fixedly connected with second springs 76 in a symmetrical manner, and the top ends of the second springs 76 are fixedly connected to the bottom surface of the connecting plate 73.

[0043] In the embodiment, when the connecting plate 73 moves towards the fixed plate 77, the second spring 76 changes from a relaxed state to a compressed state, and after the sealing plate 79 leaves the pressing plate 71, the second spring 76 plays the same role as the first spring 74, thereby preventing the tool from being unable to be normally used due to damage of the first spring 74, and improving the service life of the well cementing tool.

[0044] Further, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0045] As shown in Figure 6 and Figure 7 ;

[0046] In combination with the above, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0047] In order to further improve the anti-blocking effect, in an optional embodiment, the top surface of the pressing plate 71 is fixedly connected with a stop block 78 in a symmetrical manner, the stop block 78 is arranged in the sealing groove 62, and the stop block 78 is arranged on both sides of the second communication hole 61, and the bottom end of the sealing plate 79 is arranged in a circular arc structure.

[0048] In the embodiment, when grouting is performed, the mortar may enter the sealing grooves 62 on both sides of the second communication hole 61, the stop block 78 can block the sealing grooves 62 on both sides of the second communication hole 61, further prevent the mortar from entering the sealing grooves 62, and the bottom end of the sealing plate 79 is arranged in a circular arc structure, which can be matched with the stop blocks 78 on both sides and will not affect the sealing performance of the sealing plate 79.

[0049] Further, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0050] As shown in Figures 2 to 4 ;

[0051] In combination with the above, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0052] In order to facilitate the installation of the hydraulic rod 4, in an optional embodiment, the top surface of the moving block 5 is fixedly connected with a connecting seat 8, the top surface of the connecting seat 8 is fixedly connected with a sleeve 81, the inner wall of the sleeve 81 is provided with an internal thread, the connecting sleeve 1 is provided with the hydraulic rod 4, the bottom end of the hydraulic rod 4 is provided with an external thread, and the hydraulic rod 4 is threadedly connected with the sleeve 81.

[0053] In the embodiment, when the hydraulic rod 4 is installed, the bottom end of the hydraulic rod 4 is placed into the sleeve 81 and the hydraulic rod 4 is rotated, so that the hydraulic rod 4 and the sleeve 81 are fixed, and the installation and disassembly of the hydraulic rod 4 are facilitated.

[0054] Further, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0055] As shown in Figures 2 to 4 ;

[0056] In combination with the above, in the embodiment, the connecting plate 73 is connected to the fixed plate 77 through the first spring 74 and the second spring 76.

[0057] In order to improve the effect of grouting, in an optional embodiment, the top surface of the sleeve 81 is provided with a baffle ring 41, which is fixedly connected to the outer wall of the hydraulic rod 4, and the outer wall of the baffle ring 41 is fixedly connected with a first flow guide plate 42, and the inner wall of the top end position of the moving block 5 is fixedly connected with a second flow guide plate 9.

[0058] In this embodiment: the baffle ring 41 can shield the top of the sleeve 81 to prevent the mortar from entering the sleeve 81, thereby ensuring the stability of the connection between the sleeve 81 and the hydraulic rod 4, and by providing the first flow guide plate 42 and the second flow guide plate 9, the mortar can be quickly guided into the flow guide groove 51 without flowing onto the inner wall of the connecting sleeve 1, thereby improving the effect of grouting.

[0059] The working principle and use process of the utility model: when installing the hydraulic rod 4, only need to put the bottom end of the hydraulic rod 4 into the sleeve 81 and rotate the hydraulic rod 4, then the hydraulic rod 4 and the sleeve 81 can be fixed, which is convenient for the installation and disassembly of the hydraulic rod 4, in the case of not grouting, the moving block 5 will be at a higher position, so that the bottom end of the sealing plate 79 will contact and press down the pressing plate 71, when the pressing plate 71 moves, it will drive the connecting rod 72 to move together, so that the connecting plate 73 is driven by the connecting rod 72 to move, thereby the first spring 74 remains in a stretched state, and the sealing plate 79 blocks the second communication hole 61 to prevent the mortar from overflowing, when grouting is needed, the moving block 5 is moved by using the hydraulic rod 4, so that the sealing ring 6 moves together when the moving block 5 moves, and the moving block 5 moves to the position of the grouting hole 11, with the movement of the sealing ring 6, the sealing plate 79 no longer blocks the second communication hole 61, so that the mortar can be discharged through the grouting hole 11 for well cementing, and when the sealing plate 79 is separated from the pressing plate 71, the pressing plate 71 will be reset under the action of the first spring 74, so that the pressing plate 71 moves to the position close to the second communication hole 61, preventing the mortar from entering the bottom of the sealing groove 62, thereby improving the stability of the well cementing tool in use while ensuring the sealing property, and when the connecting plate 73 moves towards the fixed plate 77, the second spring 76 changes from a relaxed state to a compressed state, and after the sealing plate 79 leaves the pressing plate 71, the second spring 76 plays the same role as the first spring 74, thereby preventing the tool from being unable to be used normally due to the damage of the first spring 74, and improving the service life of the well cementing tool, when grouting, the mortar may enter the sealing groove 62 on both sides of the second communication hole 61 when passing through the second communication hole 61, the baffle 78 can block the sealing groove 62 on both sides of the second communication hole 61, further preventing the mortar from entering the sealing groove 62, and by setting the bottom end of the sealing plate 79 as a circular arc structure, it can be adapted to the baffle 78 on both sides, without affecting the sealing property of the sealing plate 79.

[0060] It should be pointed out finally that: the above only for the preferred embodiments of the utility model have, and do not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A staged cementing tool, comprising a connecting sleeve (1), an upper connector (2), and a lower connector (3), wherein the upper connector (2) is fixedly connected to the outer wall of the top end of the connecting sleeve (1), and the lower connector (3) is fixedly connected to the inner wall of the bottom end of the connecting sleeve (1). A movable block (5) is provided inside the connecting sleeve (1), and a sealing ring (6) is fixedly connected to the outer wall of the movable block (5). The connecting sleeve (1) is symmetrically provided with grouting holes (11). A second connecting hole (61) is provided on each of the sealing rings (6) near the grouting holes (11). A sealing groove (62) is provided on each of the sealing rings (6) near the second connecting hole (61). A first connecting hole (52) is provided on each of the movable blocks (5) near the second connecting hole (61). A guide groove (51) is provided on the movable block (5), and the guide groove (51) communicates with the first connecting hole (52). The tool is characterized in that: Each of the sealing grooves (62) is provided with an anti-clogging structure (7); The anti-blocking structure (7) includes a pressure plate (71), which is located at the bottom of the sealing groove (62). Connecting rods (72) are symmetrically fixedly connected to the bottom surface of the pressure plate (71). The sealing ring (6) has through holes (710) near the connecting rods (72). The connecting rods (72) are respectively located in the through holes (710) near the connecting rods (710). The bottom end of the connecting rod (72) passes through the through hole (710). The bottom end of the connecting rod (72) is fixedly connected to a connecting plate (73). A first spring (74) is fixedly connected to the top surface of the connecting plate (73). The top end of the first spring (74) is fixedly connected to the bottom surface of the sealing ring (6). A sealing plate (79) is fixedly connected to the inner wall of the connecting sleeve (1) near the sealing groove (62). The bottom end of the sealing plate (79) is located in the sealing groove (62).

2. The staged cementing tool according to claim 1, characterized in that: A protective box (75) is fixedly connected to the bottom surface of the sealing ring (6) near the first spring (74), and the connecting plate (73) and the first spring (74) are both located inside the protective box (75).

3. The staged cementing tool according to claim 2, characterized in that: A fixing plate (77) is fixedly connected to the bottom surface of the protective box (75), and a second spring (76) is symmetrically fixedly connected to the top surface of the fixing plate (77). The top ends of the second springs (76) are all fixedly connected to the bottom surface of the connecting plate (73).

4. The staged cementing tool according to claim 1, characterized in that: The pressure plate (71) has symmetrically fixed blocks (78) on its top surface. The blocks (78) are all located in the sealing groove (62) and are respectively located on both sides of the second connecting hole (61).

5. The staged cementing tool according to claim 4, characterized in that: The bottom end of the sealing plate (79) is configured as an arc structure.

6. The staged cementing tool according to claim 1, characterized in that: A connecting seat (8) is fixedly connected to the top surface of the movable block (5), and a sleeve (81) is fixedly connected to the top surface of the connecting seat (8). An internal thread is provided on the inner wall of the sleeve (81). A hydraulic rod (4) is provided inside the connecting sleeve (1). An external thread is provided at the bottom end of the hydraulic rod (4). The hydraulic rod (4) is threadedly connected to the sleeve (81).

7. The staged cementing tool according to claim 6, characterized in that: A retaining ring (41) is provided on the top surface of the sleeve (81), and the retaining ring (41) is fixedly connected to the outer wall of the hydraulic rod (4).

8. The staged cementing tool according to claim 7, characterized in that: A first guide plate (42) is fixedly connected to the outer wall of the retaining ring (41).

9. The staged cementing tool according to claim 8, characterized in that: A second guide plate (9) is fixedly connected to the inner wall at the top of the movable block (5).

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