Rotational flow rigid casing centralizer

Abstract

The utility model discloses a rotational flow rigid casing centralizer, which relates to the casing centralizer field, and comprises a centralizer main body, the centralizer main body is internally provided with an adjusting cavity, the inner wall of the adjusting cavity is provided with threads, the outer ring of the threads is in threaded connection with an annular movable block, and the annular movable block is convenient to twist. An arc-shaped pressing plate is movably arranged between the annular movable block and the bottom of the centralizer body, and the top of the arc-shaped pressing plate is fixedly connected with a mounting block. According to the centering device, the annular movable block in threaded connection with the centering device body is shifted to rotate, the position of the annular movable block is changed downwards at the moment, the arc-shaped pressing plate is pressed downwards after the position of the annular movable block is changed, and then the bending degree of the arc-shaped pressing plate is adjusted; in this way, the bending degree of the arc-shaped pressing plate can be conveniently adjusted according to the actual situation of site construction, and meanwhile the application range of the centralizer body is widened.

Description

Technical Field

[0001] The utility model relates to the field of casing centralizers, and particularly relates to a swirl rigid casing centralizer. Background Technique

[0002] A casing centralizer is a tool used in oil drilling and production engineering, mainly used to ensure the correct position of the casing in the wellbore, keep it centered, so that the cement slurry can solidify evenly in the annular gap between the casing and the well wall, thereby ensuring the cementing quality. This tool plays an important role in preventing the casing from contacting the well wall, improving the cementing quality and reducing the resistance of casing lowering.

[0003] The existing centralizers still have the following problems when in use: the existing casing centralizers have a single form, which leads to a limited range of use for each specification of the centralizer, and there are also many limiting conditions when selecting the centralizer, which may affect the subsequent construction efficiency.

[0004] Therefore, it is necessary to invent a swirl rigid casing centralizer to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a swirl rigid casing centralizer to solve the problem that the existing casing centralizers have a single form, which leads to a limited range of use for each specification of the centralizer, and there are also many limiting conditions when selecting the centralizer, which may affect the subsequent construction efficiency as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a swirl rigid casing centralizer, including a centralizer main body, an adjustment cavity is arranged inside the centralizer main body, and threads are arranged on the inner wall of the adjustment cavity, and an annular movable block is threadedly connected to the outer ring of the threads, which is convenient for twisting the annular movable block. An arc-shaped pressing plate is movably arranged between the annular movable block and the bottom of the centralizer main body, and an installation block is fixedly connected to the top of the arc-shaped pressing plate, and the installation block is movably connected to the annular groove arranged inside the annular movable block. It also includes:

[0007] A limiting component, a fixing rod is fixedly connected to the inner wall of the arc-shaped pressing plate, a channel is arranged inside the fixing rod, and a movable rod is movably connected to the inside of the channel through a spring, and the end of the movable rod moves inside a vertical groove preset inside the centralizer main body.

[0008] Preferably, there are eight arc-shaped pressing plates in total, and the eight arc-shaped pressing plates are evenly distributed in a ring at equal angles, and the arc-shaped pressing plates have toughness, which is convenient for adjusting the radian of the arc-shaped pressing plates subsequently.

[0009] Preferably, the mounting block is composed of a columnar block one and a columnar block two integrally installed with the columnar block one, and the outer ring diameter of the columnar block one is larger than the outer ring diameter of the columnar block two, and the outer wall of the columnar block one and the outer wall of the columnar block two are in contact with the inner wall of the annular groove and are slidably connected, so that when the annular movable block is twisted, the arc pressure plate and the mounting block fixedly connected to the top of the arc pressure plate will not hinder the rotation of the annular movable block.

[0010] Preferably, the lower end of the second columnar block is fixedly connected to the top of the arc-shaped pressure plate, so that when the annular movable block is twisted to change the height position of the annular movable block, the annular movable block presses down on the arc-shaped pressure plate so as to adjust the degree of bending of the arc-shaped pressure plate according to the actual situation at the construction site.

[0011] Preferably, two symmetrical limit blocks are fixedly connected to the two side walls of the end of the movable rod away from the fixed rod, and the limit blocks and the outer walls of the ends of the movable rod fixedly connected to the limit blocks are in contact with the inner walls of the vertical grooves to achieve sliding connection.

[0012] Preferably, the two ends of the spring are fixedly connected to the inner wall of the groove and the end wall of the movable rod movably mounted inside the groove, so that when the curvature of the arc pressure plate is adjusted, the position of the arc pressure plate will not shift.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. The utility model rotates the annular movable block, which is threadedly connected to the centralizer body and changes its position downward. After the position change, the annular movable block presses down the arc-shaped pressure plate, thereby adjusting the degree of curvature of the arc-shaped pressure plate. This facilitates adjustment of the curvature of the arc-shaped pressure plate according to the actual situation of on-site construction, and also expands the scope of application of the centralizer body.

[0015] 2. At the same time, under the restriction of the limiting component, the arc pressure plate will not be offset when adjusting the curvature, thus ensuring that the eight arc pressure plates distributed in a circular shape with equal angles will not deviate in subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 This is an exploded view of the overall structure of the present utility model;

[0019] Figure 3 This is a three-dimensional view of the internal structure of the centralizer body (in a partially sectioned state) of the present utility model;

[0020] Figure 4 This is an exploded view of the internal structure of the limiting component of the present utility model;

[0021] Figure 5 This is a three-dimensional view of the internal structure of the centralizer body (in a horizontally sectioned state) of the present utility model.

[0022] Explanation of reference numerals:

[0023] 1. Centralizer body; 2. Adjustment cavity; 3. Annular movable block; 4. Arc-shaped pressing plate; 5. Mounting block; 501. First columnar block; 502. Second columnar block; 6. Annular groove; 7. Thread; 8. Limiting component; 801. Fixed rod; 802. Movable rod; 803. Channel; 804. Spring; 805. Limiting block; 806. Vertical groove. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0025] The present utility model provides a Figures 1-5 swirling rigid casing centralizer as shown in the figure, including a centralizer body 1. An adjustment cavity 2 is provided inside the centralizer body 1, and a thread 7 is provided on the inner wall of the adjustment cavity 2. An annular movable block 3 is threadedly connected to the outer circle of the thread 7, which is convenient for twisting the annular movable block 3. An arc-shaped pressing plate 4 is movably arranged between the annular movable block 3 and the bottom of the centralizer body 1. The top of the arc-shaped pressing plate 4 is fixedly connected to a mounting block 5, and the mounting block 5 is movably connected to an annular groove 6 provided inside the annular movable block 3. It further includes:

[0026] A limiting component 8. A fixed rod 801 is fixedly connected to the inner wall of the arc-shaped pressing plate 4. A channel 803 is provided inside the fixed rod 801, and a movable rod 802 is movably connected to the inside of the channel 803 through a spring 804. The end of the movable rod 802 moves inside a vertical groove 806 preset inside the centralizer body 1.

[0027] There are a total of eight arc-shaped pressing plates 4, and the eight arc-shaped pressing plates 4 are evenly distributed at equal angles in a ring shape. The arc-shaped pressing plate 4 itself has toughness, which is convenient for adjusting the radian of the arc-shaped pressing plate 4 subsequently.

[0028] The mounting block 5 is composed of a columnar block 1 501 and a columnar block 2 502 integrally installed with the columnar block 1 501, and the outer ring diameter of the columnar block 1 501 is larger than the outer ring diameter of the columnar block 2 502, and the outer wall of the columnar block 1 501 and the outer wall of the columnar block 2 502 are in contact with the inner wall of the annular groove 6 and are slidably connected. In this way, when the annular movable block 3 is twisted, the arc pressure plate 4 and the mounting block 5 fixedly connected to the top of the arc pressure plate 4 will not hinder the rotation of the annular movable block 3.

[0029] The lower end of the columnar block 2 502 is fixedly connected to the top of the arc-shaped pressure plate 4, so that when the annular movable block 3 is twisted to change the height position of the annular movable block 3, the annular movable block 3 presses down on the arc-shaped pressure plate 4 so as to adjust the degree of bending of the arc-shaped pressure plate 4 according to the actual situation at the construction site.

[0030] Two symmetrical limit blocks 805 are fixedly connected to the two side walls of the end of the movable rod 802 away from the fixed rod 801, and the limit blocks 805 and the outer walls of the ends of the movable rod 802 fixedly connected to the limit blocks 805 are in contact with the inner walls of the vertical groove 806 to achieve sliding connection.

[0031] The two ends of the spring 804 are fixedly connected to the inner wall of the groove 803 and the end wall of the movable rod 802 movably mounted inside the groove 803, so that when the curvature of the arc pressure plate 4 is adjusted, the position of the arc pressure plate 4 will not shift.

[0032] When the annular movable block 3 is rotated in an annular direction, the annular movable block 3 is threadedly connected to the threaded hole 7 set on the inner wall of the adjustment cavity 2 preset in the centralizer body 1. At this time, the rotation of the annular movable block 3 in different directions can change the upper and lower positions of the annular movable block 3. When the annular movable block 3 is rotated in a clockwise direction, the annular movable block 3 threadedly connected to the centralizer body 1 changes its position downward. After the position of the annular movable block 3 changes, the arc pressure plate 4 that is movably connected to the annular groove 6 preset in the annular movable block 3 is pressed down. At this time, it is convenient to adjust the bending degree of the arc pressure plate 4, and the threaded connection has self-locking properties. When the annular movable block 3 is no longer rotated, the height position of the annular movable block 3 will not change. This makes it convenient to adjust the bending degree of the arc pressure plate 4 according to the actual situation of on-site construction to ensure the limitation of the bending degree of the arc pressure plate 4.

[0033] At the same time, when the arc-shaped pressing plate 4 is adjusted in terms of the degree of bending, under the restrictive action of the fixed rod 801 and the movable rod 802 movably sleeved inside the fixed rod 801, the movable rod 802 moves inside the vertical groove 806 at a fixed position, so as to ensure that the subsequent use of the eight arc-shaped pressing plates 4 distributed at equal angles in a ring shape will not deviate, and ensure that the use of the entire centralizer body 1 is more accurate.

[0034] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A swirl rigid casing centralizer, comprising a centralizer body (1), characterized in that, An adjustment cavity (2) is provided inside the centralizer body (1), and threads (7) are provided on the inner wall of the adjustment cavity (2). An annular movable block (3) is threadedly connected to the outer circle of the threads (7). An arc-shaped pressing plate (4) is movably arranged between the annular movable block (3) and the bottom of the centralizer body (1). A mounting block (5) is fixedly connected to the top of the arc-shaped pressing plate (4), and the mounting block (5) is movably connected to an annular groove (6) provided inside the annular movable block (3). Further included is: A limiting component (8). A fixing rod (801) is fixedly connected to the inner wall of the arc-shaped pressing plate (4). A channel (803) is provided inside the fixing rod (801). A movable rod (802) is movably connected to the inside of the channel (803) through a spring (804). The end of the movable rod (802) moves inside a vertical groove (806) preset inside the centralizer body (1).

2. The swirl rigid casing centralizer according to claim 1, characterized in that, There are eight arc-shaped pressing plates (4) in total, and the eight arc-shaped pressing plates (4) are evenly distributed in a ring at equal angles. The arc-shaped pressing plate (4) has toughness itself.

3. The swirl rigid casing centralizer according to claim 1, characterized in that, The mounting block (5) is composed of a columnar block one (501) and a columnar block two (502) integrally installed with the columnar block one (501). The outer diameter of the columnar block one (501) is larger than the outer diameter of the columnar block two (502). The outer walls of the columnar block one (501) and the columnar block two (502) are in contact with the inner wall of the annular groove (6) and are slidably connected.

4. The swirl rigid casing centralizer according to claim 3, characterized in that, The lower end of the columnar block two (502) is fixedly connected to the top of the arc-shaped pressing plate (4).

5. A swirl rigid casing centralizer according to claim 1, characterized in that, Two symmetrical limiting blocks (805) are fixedly connected to the two side walls of the end of the movable rod (802) away from the fixing rod (801). The outer walls of the limiting blocks (805) and the end of the movable rod (802) fixedly connected to the limiting blocks (805) are in contact with the inner wall of the vertical groove (806) and are slidably connected.

6. The swirl rigid casing centralizer according to claim 1, characterized in that, The two ends of the spring (804) are respectively fixedly connected to the inner wall of the channel (803) and the end wall of the movable rod (802) movably sleeved inside the channel (803).

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