Casing centralizer for oil exploitation

Abstract

A casing centralizer for oil exploitation comprises a plurality of installation modules arranged around the axis of a casing in a surrounding mode. The mounting module comprises a mounting plate, a supporting strip, a connecting belt and a mounting groove; one side of the mounting plate is in contact with the sleeve, and the other side of the mounting plate is provided with a supporting strip; the supporting strip is arranged on the side away from the mounting plate and makes contact with the well wall. One end of the connecting belt is connected to one side of the mounting plate, and the other end of the connecting belt is connected into the mounting groove of the adjacent mounting plate. The problems that a traditional fixed centralizer is poor in adaptability and difficult to adapt to sleeves of different specifications, and the sleeving installation step is tedious are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil exploitation equipment technical field, specifically, relate to a casing centralizer for oil exploitation. BACKGROUND

[0002] In oil drilling engineering, casing centralizer is the key device to ensure casing installation in the wellbore. The conventional centralizer adopts fixed structure, which has poor adaptability, cannot be adjusted when the casing diameter changes, and is difficult to adapt to casings of different diameters. Moreover, the conventional centralizer needs to be sleeved from the casing end, but the casing generally has a long length, so that the sleeving and installation steps are more complicated. SUMMARY

[0003] The utility model discloses casing centralizer for oil exploitation, solved the conventional fixed centralizer poor adaptability, difficult to adapt to different specifications casing, and the step of sleeving and installation is more complicated.

[0004] The embodiment of the utility model realizes by the following technical scheme:

[0005] A casing centralizer for oil exploitation comprises:

[0006] A plurality of installation modules are arranged around the axis of the casing.

[0007] The installation module comprises an installation plate, a support strip, a connecting belt and an installation slot. One side of the installation plate is in contact with the casing, and the other side is provided with a support strip. The support strip is arranged on the side away from the installation plate and is in contact with the well wall. One end of the connecting belt is connected to one side of the installation plate, and the other end is connected to the installation slot of the adjacent installation plate.

[0008] The side of the installation plate in contact with the casing is an arc-shaped concave surface.

[0009] An elastic pad is arranged on the arc-shaped concave surface of the installation plate, and a gap is left between the elastic pad and the arc-shaped concave surface.

[0010] A chamber is arranged inside one side of the installation plate, and a side hole is arranged towards one side of the adjacent installation plate. A rotating shaft is rotatably arranged inside the chamber, one end of the rotating shaft penetrates through one side of the installation plate and is fixed by a limiting mechanism. One end of the connecting belt penetrates through the side hole and is connected to the side wall of the rotating shaft. When the rotating shaft rotates, one end of the connecting belt can be driven to retract into or extend out of the chamber, so that the adjacent installation plate is closer or farther away.

[0011] The limiting mechanism comprises a telescopic rod, a limiting slot and a limiting end; one end of the telescopic rod is connected to one end of the rotating shaft, and the other end is connected to the limiting end; a limiting tooth is arranged on the side wall of the limiting end; a tooth groove is arranged on the side wall of the limiting slot and is engaged with the limiting tooth; when the limiting end is placed in the limiting slot with the telescopic rod shortened, the limiting tooth on the side wall of the limiting end is engaged with the tooth groove, so that the rotating shaft is fixed; when the limiting end is separated from the limiting slot with the telescopic rod lengthened, the limiting end is controlled to rotate, and then the rotating shaft can be driven to rotate.

[0012] The mounting slot is provided with a mounting column and a fixing nut; one end of the mounting column is provided with a thread, and the fixing nut is matched and mounted on the mounting column; one end of the connecting belt away from the chamber is provided with a mounting hole; when the mounting hole is sleeved on the mounting column, the fixing nut is mounted on the mounting column to press the connecting belt to the bottom of the limiting slot, so that one end of the connecting belt is fixed.

[0013] The technical scheme of the utility model embodiment has at least the following advantages and beneficial effects:

[0014] 1. The casing centralizer for oil exploitation of the utility model adopts a plurality of installation modules distributed around the casing axis, and adjacent installation modules are connected through connecting belts, and the installation of the device can be directly performed on the installation position of the casing side wall, avoiding the need to disassemble the casing and sleeve it from the end portion.

[0015] 2. The casing centralizer for oil exploitation of the utility model drives the connecting belt to be wound and unwound through the rotating shaft, realizes accurate control of the spacing between adjacent installation plates, and further expands the range of installable casing sizes by adjusting the number of installation modules.

[0016] 3. The casing centralizer for oil exploitation of the utility model adopts an arc-shaped concave design of the installation plate, which can better fit the casing, increase the contact area, and form a double-layer buffer structure in cooperation with the design of the elastic pad and the gap, effectively absorbing the vibration impact in the drilling process, and when the elastic pad is in contact with the casing, the side of the elastic pad is attached to the casing side wall of the arc surface, and the other side is close to the arc-shaped concave surface of the installation plate, and the gap between them provides space for the deformation of the elastic pad.

[0017] 4. The casing centralizer for oil exploitation of the utility model adopts a limiting mechanism to ensure positioning after adjusting the connecting belt, fixes through the engagement of the limiting tooth and the tooth groove, and adopts the design of the telescopic rod, so that the limiting end can be adjusted by being separated from the limiting slot, realizing quick adjustment and positioning fixation; and the mounting column and the fixing nut cooperate to realize quick locking and anti-disengagement of the end of the connecting belt; the modules are connected through the connecting belt, simplifying the assembly process, and the limiting mechanism can be quickly unlocked and adjusted without disassembling the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall assembly schematic diagram of the utility model;

[0019] Figure 2 is the structure schematic diagram of the installation module; Figure 1 is the enlarged view of A in the middle;

[0020] Figure 3 is the structure schematic diagram of the installation module;

[0021] Figure 4 is the structure schematic diagram of the installation module; Figure 3 is the enlarged view of B in the middle;

[0022] Figure 5 is the structure schematic diagram of the installation module; Figure 4 is the structure schematic diagram of the installation module;

[0023] Figure 6 is the structure schematic diagram of the installation module; Figure 3 is the sectional view of a-a in the middle.

[0024] In the figure, 101 is the installation plate, 102 is the support strip, 103 is the connecting belt, 104 is the installation groove, 105 is the installation column, 106 is the fixing nut, 107 is the cavity, 108 is the side hole, 109 is the rotating shaft, 110 is the shaft sleeve, 111 is the telescopic shaft, 112 is the limiting end, 113 is the limiting groove, 114 is the installation hole, and 2 is the elastic pad. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the utility model.

[0027] As Figure 1As shown, a casing centralizer for oil exploitation includes a plurality of installation modules arranged around the axis of the casing; one side of the installation modules is attached to the sidewall of the casing and is connected to the casing to prevent the casing from deviating in the well and to avoid the casing directly contacting the well wall, thereby reducing the friction and collision between the casing and the well wall and reducing the risk of damage to the casing; the installation module includes an installation plate 101, a support strip 102, a connecting band 103, and an installation slot 104; one side of the installation plate 101 contacts the casing, and the other side is provided with a support strip 102 along the axis of the casing; the support strip 102 is provided on the side away from the installation plate 101 and contacts the well wall; one end of the connecting band 103 is connected to one side of the installation plate 101, and the other end is connected to the installation slot 104 of the adjacent installation plate 101 for connecting the adjacent two installation modules; when the device needs to be installed on the casing, a corresponding number of installation modules are connected in sequence through the connecting band 103, and then they are arranged around the casing so that the installation modules are attached to the casing wall; finally, the connecting band 103 on the installation module at one end is fixed in the installation slot 104 on the installation module at the other end, so that the device is installed on the casing.

[0028] As shown in Figure 3 and 6 in an embodiment, the side of the installation plate 101 that contacts the casing is arc-shaped and concave, which makes it more closely attached to the casing and increases the contact area; an elastic pad 2 is provided on the arc-shaped concave surface of the installation plate 101, and the two sides of the elastic pad 2 are fixedly connected to the two sides of the arc-shaped concave surface, respectively, and a gap is left between the elastic pad 2 and the arc-shaped concave surface; when the elastic pad 2 is installed in contact with the casing, one side of the elastic pad 2 is attached to the sidewall of the casing on the arc-shaped surface, and the other side is close to the arc-shaped concave surface of the installation plate 101, and the gap between them is reduced, leaving space for the deformation of the elastic pad 2, so that the elastic pad 2 is more closely in contact with the casing.

[0029] As shown in Figure 6 in an embodiment, a cavity 107 is provided inside one side of the installation plate 101, and a side hole 108 is provided towards the side of the adjacent installation plate 101; the number of cavities 107 is preferably two, which makes the connection of the connecting band 103 more stable and avoids deviation; a rotating shaft 109 is rotatably provided inside the cavity 107, and the rotating shafts 109 in the two cavities 107 are connected to each other and can be controlled synchronously; one end of the rotating shaft 109 penetrates through one side of the installation plate 101 and is fixed by a limiting mechanism for fixing after the rotating shaft 109 rotates, thereby fixing the distance between the adjacent installation plates 101; one end of the connecting band 103 penetrates through the side hole 108 and is connected to the sidewall of the rotating shaft 109; when the rotating shaft 109 rotates, it can drive one end of the connecting band 103 to retract into or extend out of the cavity 107, thereby making the adjacent installation plates 101 closer or farther apart.

[0030] AsFigure 3 and 4 As shown, in one embodiment, the limiting mechanism includes a telescopic rod, a limiting groove 113, and a limiting end 112; one end of the telescopic rod is connected to one end of the rotating shaft 109, and the other end is connected to the limiting end 112; the limiting end 112 has limiting teeth on its side wall; the limiting groove 113 has a toothed groove on its side wall that meshes with the limiting teeth; when the limiting end 112 is placed in the limiting groove 113 as the telescopic rod shortens, the limiting teeth on the side wall of the limiting end 112 mesh with the toothed groove, thus fixing the rotating shaft 109; when the limiting end 112 disengages from the limiting groove 113 as the telescopic rod extends, the limiting end 112 is controlled to rotate, thereby driving the rotating shaft 109 to rotate;

[0031] Specifically, the telescopic rod includes a bushing 110 and a telescopic shaft 111; the telescopic shaft 111 is movably disposed in the bushing 110, one end of the bushing 110 is connected to one end of the rotating shaft 109, and one end of the telescopic shaft 111 is connected to the limiting end 112; and the inner side wall of the bushing 110 is provided with a limiting strip, and the side wall of the telescopic shaft 111 is provided with a limiting groove 113, so that the limiting strip is slidably disposed in the limiting groove 113, restricting the telescopic shaft 111 to move only in the bushing 110 and not to rotate, thereby allowing the rotating shaft 109 to rotate when the limiting end 112 is rotated.

[0032] like Figure 2 As shown, in one embodiment, the mounting groove 104 is provided with a mounting post 105 and a fixing nut 106; one end of the mounting post 105 is provided with a thread, and the fixing nut 106 is fitted onto the mounting post 105; the end of the connecting band 103 away from the chamber 107 is provided with a mounting hole 114; when the mounting hole 114 is fitted onto the mounting post 105, the fixing nut 106 is installed on the mounting post 105 to press the connecting band 103 to the bottom of the limiting groove 113, so that one end of the connecting band 103 is fixed.

[0033] The working principle of this embodiment is as follows:

[0034] The utility model discloses a casing centralizer for petroleum exploitation, when needing setting the device on the casing, first, the one end of connecting band 103 of one side of mounting panel 101 is placed in the installation groove 104 of adjacent mounting panel 101, the mounting hole 114 of one end of connecting band 103 is sleeved on the mounting column 105 in installation groove 104, then the fixed nut 106 is installed on the mounting column 105 and is pressed to the bottom of limiting groove 113 with connecting band 103, so that one end of connecting band 103 is fixed, the above-mentioned steps are repeated, and the corresponding number of installation modules are connected in turn through connecting band 103, then are surrounded on the casing lateral wall, so that the elastic pad 2 on the installation module is attached on the casing lateral wall, then the connecting band 103 on the installation module at one end is fixed in the installation groove 104 on the installation module at the other end, so that the device is sleeved on the casing, finally, control limiting end 112 to separate from limiting groove 113 and rotate, and then drive the rotation of the rotating shaft 109, so that connecting band 103 is inserted into or extended from the cavity, and then control the distance between adjacent mounting panel 101, when its position is adjusted, the device is stably installed on the casing, then limiting end 112 enters limiting groove 113, and the limiting tooth on the lateral wall of limiting end 112 is engaged with the gear slot, so that the rotating shaft 109 is fixed, and the installation is completed.

[0035] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. 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 casing centralizer for use in oil production, characterized in that The utility model relates to a casing installation device, comprising: a plurality of installation modules arranged around the axis of the casing; the installation module comprises an installation plate, a support strip, a connecting band and an installation slot; one side of the installation plate is in contact with the casing, and the other side is provided with the support strip; the support strip is arranged on the side away from the installation plate and is in contact with the well wall; one end of the connecting band is connected to one side of the installation plate, and the other end is connected to the installation slot of the adjacent installation plate.

2. A casing centralizer for use in oil production according to claim 1, characterized in that, The side of the installation plate in contact with the casing is arc-shaped concave.

3. A casing centralizer for use in oil production according to claim 2, characterized in that, An elastic pad is arranged on the arc-shaped concave surface of the installation plate, and a gap is left between the elastic pad and the arc-shaped concave surface.

4. A casing centralizer for use in oil production according to claim 1, characterized in that, A cavity is arranged inside one side of the installation plate, and a side hole is arranged towards one side of the adjacent installation plate; a rotating shaft is rotatably arranged inside the cavity, one end of the rotating shaft penetrates through one side of the installation plate and is fixed by a limiting mechanism; one end of the connecting band penetrates through the side hole and is connected to the side wall of the rotating shaft; when the rotating shaft rotates, one end of the connecting band can be driven to retract into or extend out of the cavity, thereby causing the adjacent installation plate to move closer or further apart.

5. A casing centralizer for use in oil production according to claim 4, characterized in that, The limiting mechanism comprises an extension rod, a limiting slot and a limiting end; one end of the extension rod is connected to one end of the rotating shaft, and the other end is connected to the limiting end; a limiting tooth is arranged on the side wall of the limiting end; a tooth groove is arranged on the side wall of the limiting slot and engages with the limiting tooth; when the limiting end is placed in the limiting slot as the extension rod shortens, the limiting tooth on the side wall of the limiting end engages with the tooth groove, so that the rotating shaft is fixed; when the limiting end is separated from the limiting slot as the extension rod lengthens, the limiting end is controlled to rotate, thereby driving the rotating shaft to rotate.

6. A casing centralizer for use in oil production according to claim 1, characterized in that, An installation column and a fixing nut are arranged in the installation slot; the installation column is provided with a thread at one end, and the fixing nut is fitted on the installation column; one end of the connecting band away from the cavity is provided with an installation hole; when the installation hole is sleeved on the installation column, the fixing nut is installed on the installation column to press the connecting band tightly to the bottom of the limiting slot, so that one end of the connecting band is fixed.

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