Directional well casing centralizing device

Abstract

The utility model relates to the technical field of directional well casing centralizing, in particular to a directional well casing centralizing device. Comprising an upper sleeve and a lower sleeve, a plurality of mounting grooves are evenly distributed in the outer portion of the upper sleeve in the circumferential direction, elastic pieces are detachably connected into the mounting grooves, a plurality of inserting grooves corresponding to the mounting grooves are formed in the outer portion of the lower sleeve, and the bottom ends of the elastic pieces are inserted into the inserting grooves; a mounting groove is formed in the elastic piece, a fixing block is arranged in the mounting groove, the elastic piece is provided with a groove, the fixing block is inserted into the groove, and the fixing block is provided with a movable limiting assembly. According to the centralizing device, each elastic piece can be detached independently, the damaged elastic pieces can be replaced in a targeted mode, and the centralizing device is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of directional well casing straightening, in particular to a directional well casing straightening device. Background Art

[0002] In the process of directional well construction, in order to ensure that the lowered casing string is in the center of the wellbore, a straightening device is installed on the outer surface of the casing. The straightening device in the prior art is divided into a rigid device and an elastic device. The elastic device has a spring, which stretches radially against the inner wall of the wellbore to maintain the interval between the pipe string and the wellbore. However, the existing springs are mostly fixed directly on the main frame. When the spring is deformed or damaged, it cannot be replaced, and the whole device cannot be used, which is relatively wasteful.

[0003] The patent document with publication number CN219993639U discloses a directional well casing straightening device, which can quickly disassemble the spring pieces by setting a threaded cylinder, a rotating cylinder, a first inserting cylinder, a fixed cylinder and a second inserting cylinder, so as to facilitate the replacement of the spring pieces. However, when replacing the spring pieces, the device in the patent document can only disassemble all the spring pieces at the same time, and cannot disassemble only the damaged spring pieces in a targeted manner, which is not convenient for actual use. Therefore, the present utility model is proposed. Utility Model Content

[0004] The utility model aims to provide a directional well casing straightening device, each spring piece on the straightening device can be disassembled independently, and the damaged spring piece can be replaced in a targeted manner, which is convenient to use.

[0005] The utility model provides a directional well casing straightening device, comprising an upper sleeve and a lower sleeve, wherein the outer portion of the upper sleeve is evenly distributed with a plurality of mounting grooves along the circumferential direction, wherein spring pieces are detachably connected to the mounting grooves, and the outer portion of the lower sleeve is provided with a plurality of slots corresponding to the mounting grooves, wherein the bottom ends of the spring pieces are inserted into the slots; a fixing block is provided in the mounting groove, wherein the spring piece is provided with a groove, wherein the fixing block is inserted into the groove, and wherein the fixing block is provided with a movable limiting component.

[0006] Furthermore, the limiting assembly includes a slide groove and two symmetrically arranged L-shaped sliders, the slide groove is arranged inside the fixed block, the horizontal section of the L-shaped slider slides along the slide groove, and one end of the horizontal section of the L-shaped slider can extend out of the fixed block; one end of the vertical section of the L-shaped slider is located outside the fixed block.

[0007] Furthermore, two opposite side walls of the installation groove are respectively provided with limiting grooves, and an end of the horizontal section of the L-shaped sliding block away from the vertical section can be inserted into the limiting groove.

[0008] Furthermore, it also includes a limiting bolt, a first threaded hole connected to the limiting groove is provided on two opposite side walls of the installation groove, a second threaded hole is provided at one end of the horizontal section of the L-shaped sliding block, and the limiting thread passes through the first threaded hole and is connected to the second threaded hole.

[0009] Furthermore, a spring is provided between the two L-shaped sliders, and two ends of the spring are respectively fixedly connected to the vertical sections of the L-shaped sliders.

[0010] Furthermore, a sliding rod is provided inside the fixed block, the sliding rod is arranged parallel to the top of the sliding groove, and the vertical section of the L-shaped sliding block is slidably connected to the sliding rod.

[0011] Furthermore, the spring is sleeved outside the sliding rod.

[0012] Furthermore, the spring plate is composed of an upper connecting plate, an arc plate, and a lower connecting plate, and the upper connecting plate and the lower connecting plate are respectively fixed to the top and bottom ends of the arc plate; the upper connecting plate is located in the mounting groove, and the lower connecting plate is located in the slot.

[0013] Furthermore, a ball bearing is provided in the middle of the arc plate.

[0014] Furthermore, the side wall of the slot is provided with a fixing bolt, the lower connecting plate is provided with a fixing hole, and the fixing bolt is connected to the fixing hole.

[0015] In summary, compared with the prior art, the utility model has the following advantages:

[0016] The technical solution provided by the utility model fixes the spring piece by means of the installation groove and the slot respectively provided on the upper sleeve and the lower sleeve, wherein the installation groove is provided with a fixing block, and when in use, the bottom end of the spring piece is directly inserted into the slot, the groove on the spring piece is engaged with the fixing block, and the limiting assembly on the fixing block is moved to fix the spring piece, and the installation of the spring piece can be completed. When the spring piece needs to be disassembled, the limiting assembly is removed, the spring piece is separated from the fixing block, and the bottom end of the spring piece is taken out of the slot at the same time, which is convenient for disassembly and replacement of the spring piece. Each spring piece provided in the directional well casing straightening device provided by the utility model can be disassembled, and only the damaged spring piece can be replaced in a targeted manner, so as to avoid the whole device being unusable due to the damage of the spring piece, reduce waste, improve the reusability of the device, facilitate installation and disassembly, and have practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the righting device in Embodiment 1 of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the spring piece in Embodiment 1 of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the installation slot in Example 1 of the utility model;

[0021] Figure 4 It is a cross-sectional view of the fixing block in Embodiment 1 of the present utility model;

[0022] Figure 5 This is a schematic diagram of the installation of the spring piece and the installation groove in Example 1 of the utility model;

[0023] Figure 6 This is a front view of the righting device in Embodiment 2 of the present utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the spring piece in Embodiment 2 of the present utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the installation slot in Embodiment 3 of the present utility model;

[0026] Fig. 9 It is a cross-sectional view of the L-shaped sliding block extending outside the fixed block in Example 3 of the utility model;

[0027] Fig.10 This is a cross-sectional view of the L-shaped sliding block in Example 3 of the utility model located inside the fixed block.

[0028] Explanation of the reference numerals: 1-upper sleeve; 2-lower sleeve; 3-spring; 301-upper connecting plate; 302-arc plate; 303-lower connecting plate; 304-groove; 305-fixing hole; 306-ball; 4-mounting groove; 401-limiting groove; 5-slot; 501-fixing bolt; 6-fixing block; 601-slide groove; 602-L-shaped slider; 6021-second threaded hole; 603-slide rod; 604-spring; 605-opening; 606-exit; 7-limiting bolt. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Example 1

[0033] A directional well casing straightening device, such as Figure 1 As shown, it comprises an upper sleeve 1 and a lower sleeve 2, the outer wall of the upper sleeve 1 is evenly fixed with a plurality of mounting grooves 4 along the circumferential direction, and the outer wall of the lower sleeve 2 is fixed with a plurality of slots 5 corresponding to the mounting grooves 4 along the circumferential direction; a spring piece 3 is detachably connected to the mounting groove 4, and the bottom of the spring piece 3 is inserted into the slot 5. In this embodiment, 6 mounting grooves 4, 6 slots 5 and 6 spring pieces 3 are provided.

[0034] The upper sleeve 1 and the lower sleeve 2 in this embodiment are both sleeves commonly used in the prior art in this field.

[0035] The spring piece 3 in this embodiment is composed of an upper connecting plate 301, an arc plate 302, and a lower connecting plate 303. Figure 2 As shown, the upper connecting plate 301 and the lower connecting plate 303 are respectively fixed at the top and bottom ends of the arc plate 302. In this embodiment, the upper connecting plate 301, the arc plate 302, and the lower connecting plate 303 are integrally formed; the upper connecting plate 301 and the lower connecting plate 303 are both planar structures; the upper connecting plate 301 is located in the installation groove 4, and the lower connecting plate 303 is located in the slot 5.

[0036] The slot 5 in this embodiment is a square structure with an open top; the mounting slot 4 is an inverted U-shape, such as Figure 3 As shown, the bottom and the side wall away from the upper sleeve 1 are completely open. A fixing block 6 is welded on the side wall where the mounting groove 4 is connected to the upper sleeve 1, and a groove 304 is provided on the upper connecting plate 301 of the spring piece 3. The fixing block 6 is inserted into the groove 304. The fixing block 6 is provided with a movable limiting component for fixing the spring piece 3. In this embodiment, when the spring piece 3 is installed in the mounting groove 4 and the slot 5, the edge of the spring piece 3 is as close to the inner wall of the mounting groove 4 and the slot 5 as possible, so that the mounting groove 4 and the slot 5 can be easily connected to the spring piece 3.

[0037] The limiting assembly in this embodiment includes a slide groove 601 and two symmetrically arranged L-shaped sliders 602. The slide groove 601 arranged in the horizontal direction is fixedly installed inside the fixed block 6. The horizontal section of the L-shaped slider 602 is slidably connected in the slide groove 601. The vertical sections of the two L-shaped sliders 602 are adjacently arranged. Figure 3 and Figure 4 As shown. Outlets 606 are provided on two opposite side walls of the fixed block 6, and the outlets 606 are respectively located at the two ends of the slide groove 601. The end of the horizontal section of the L-shaped slider 602 away from the vertical section can slide out to the outside of the outlet 606; an opening 605 is provided on the side wall of the fixed block 6 away from the upper sleeve 1, and the vertical section of the L-shaped slider 602 extends out of the opening 605. When the groove 304 on the spring sheet 3 is engaged with the fixed block 6, the two fit as closely as possible. At the same time, when the L-shaped slider 602 is inserted into the limiting groove 401, the bottom of the horizontal section of the L-shaped slider 602 fits closely with the spring sheet 3, which can ensure that the spring sheet 3 is stable in the installation groove 4. In order to make the spring sheet 3 more stable, the size of the fixed block 6 and the L-shaped slider 602 can be as large as possible.

[0038] Limiting grooves 401 are provided on two opposite side walls of the mounting groove 4, and one end of the horizontal section of the L-shaped slider 602 away from the vertical section passes through the outlet 606 and is inserted into the limiting groove 401. The initial state of the limiting assembly is that the horizontal section of the L-shaped slider 602 extends out of the fixed block 6. When in use, the two L-shaped sliders 602 are brought close together to move the horizontal section of the L-shaped slider 602 into the inside of the fixed block 6, and the groove 304 of the upper connecting plate 301 is clamped on the fixed block 6. Finally, the two L-shaped sliders 602 are pushed in opposite directions to insert the horizontal section of the L-shaped slider 602 into the limiting groove 401, thereby fixing the spring piece 3.

[0039] A limiting bolt 7 is also provided, and two opposite side walls of the installation groove 4 are provided with a first threaded hole connected to the limiting groove 401, and one end of the horizontal section of the L-shaped slider 602 is provided with a second threaded hole 6021, and the limiting bolt 7 passes through the first threaded hole and is connected to the second threaded hole 6021. The horizontal section of the L-shaped slider 602 is fixed by the provided limiting bolt 7, ensuring that the horizontal section of the L-shaped slider 602 is always inserted in the limiting groove 401 when the device is used, thereby ensuring the installation stability of the spring piece 3.

[0040] The method of using the directional well casing straightening device provided in this embodiment is as follows: when in use, insert the lower connecting plate 303 of the spring piece 3 into the slot 5, and clamp the upper connecting plate 301 of the spring piece 3 with the fixed block 6: move the vertical section of the L-shaped slider 602, so that the horizontal section of the L-shaped slider 602 is separated from the limiting groove 401 and moved to the inside of the fixed block 6, and then clamp the groove 304 of the upper connecting plate 301 to the outside of the fixed block 6, move the L-shaped slider 602 to reset, so that the horizontal section of the L-shaped slider 602 is inserted into the limiting groove 401, and finally tighten the limiting bolt 7 to complete the installation of the spring piece 3. The connection state between the spring piece 3 and the installation slot 4 is as shown in FIG. Figure 5 When disassembling the spring piece 3, the reverse operation is sufficient: unscrew the limit bolt 7, slide the vertical sections of the two L-shaped sliders 602 closer to each other, separate the horizontal section of the L-shaped slider 602 from the limit groove 401 and move it to the inside of the fixed block 6, separate the upper connecting plate 301 from the fixed block 6, and finally remove the lower connection 303 from the slot 5 to complete the disassembly of the spring piece 3.

[0041] Example 2

[0042] A directional well casing straightening device, the technical solution in this embodiment is basically the same as that in embodiment 1, except that: (1) Figure 6 As shown, a fixing bolt 501 is provided on the side wall of the slot 5 away from the lower sleeve 2, and a fixing hole 305 (such as Figure 7 As shown), the fixing bolt 501 is threadedly connected with the fixing hole 305; (2) a groove is provided in the middle of the side wall of the arc plate 302 of the spring piece 3, and a ball 306 is installed in the groove. The ball 306 can roll in the groove, and the ball 306 protrudes from the arc plate 302, as shown Figure 7 shown.

[0043] The bottom of the spring piece 3 is fixed by the fixing bolt 501 to prevent the spring piece 3 from slipping out of the slot 5 when used in a harsh environment, thereby affecting the use effect. When in use, the ball 306 is fitted with the well wall of the directional well, and sliding friction is generated between the ball 306 and the well wall, thereby reducing the wear of the arc plate 302 and increasing the service life of the spring piece 3.

[0044] Example 3

[0045] A directional well casing straightening device, the technical solution in this embodiment is basically the same as that in embodiment 2, except that: a sliding rod 603 and a spring 604 are also provided in this embodiment.

[0046] like Figure 8 and Fig. 9 As shown, a slide bar 603 parallel to the slide slot 601 is provided inside the fixed block 6, and the slide bar 603 is located above the slide slot 601. The vertical section of the L-shaped slider 602 is provided with a round hole for the slide bar 603 to pass through, and the vertical section of the L-shaped slider 602 slides along the slide bar 603. A spring 604 is installed between the two L-shaped sliders 602, and the spring 604 is sleeved outside the slide bar 603. The two ends of the spring 604 are respectively fixedly connected to the vertical sections of the two L-shaped sliders 602. The spring 604 in this embodiment is a spring in a compressed state. The elastic force of the spring 604 is used to keep the horizontal sections of the two L-shaped sliders 602 inserted in the limiting groove 401 at all times. Only when an external force is applied to make the two L-shaped sliders 602 approach each other, can the L-shaped slider 602 be separated from the limiting groove 401.

[0047] The set spring 604 is suitable for the state of good directional well construction environment. The elastic force of the spring 604 is used to ensure that one end of the horizontal section of the L-shaped slider 602 is always inserted in the limit groove 401. The installation is convenient and quick, and it can be used without installing the limit bolt 7. The limit bolt 7 can be installed at the same time when constructing in harsh environment.

[0048] The method of using the directional well casing straightening device in this embodiment is as follows: when installing the spring piece 3, first insert the lower connecting plate 303 of the spring piece 3 into the slot 5, and then install the upper connecting plate 301: put the groove 304 of the upper connecting plate 301 on the fixed block 6, and then move the vertical section of the L-shaped slider 602, and make the two L-shaped sliders 602 close to each other, so that the horizontal section of the L-shaped slider 602 slides to the inside of the fixed block 6 (such as Fig.10 As shown in the figure, press the upper connecting plate 301 hard to make the groove 304 engage with the fixing block 6, loosen the vertical section of the L-shaped slider 602, and the L-shaped slider 602 slides under the elastic force of the spring 604, so that the horizontal section is inserted into the limiting groove 401, and the spring piece 3 can be quickly installed and fixed. When removing the spring piece 3, the reverse operation can be performed: slide the vertical section of the L-shaped slider 602, and bring the two L-shaped sliders 602 close together, so that the horizontal section of the L-shaped slider 602 slides into the inside of the fixing block 6 and fixes it (you can use a clamping tool such as pliers to clamp the vertical sections of the two L-shaped sliders 602 to fix them), separate the groove 304 of the spring piece 3 from the fixing block 6, and remove the lower connecting plate 303 from the slot 5, and the spring piece 3 can be removed.

[0049] The directional well casing straightening device provided by the utility model is clamped with the spring piece through the fixing block, and the spring piece is fixed by the limit assembly, which is convenient for installation and disassembly; the provided sliding rod and spring can quickly install the spring piece, which is more convenient to use, and the limit bolts and fixing bolts are also provided to cope with construction operations in harsh environments; each spring piece provided in the device can be disassembled, and the damaged spring piece can be replaced in a targeted manner, so as to avoid the whole device being unusable due to damage of the spring piece, reduce waste, and improve the reusability of the straightening device.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A directional well casing straightening device, characterized in that: The invention comprises an upper sleeve (1) and a lower sleeve (2); the outer portion of the upper sleeve (1) is provided with a plurality of mounting grooves (4) evenly distributed along the circumferential direction; a spring sheet (3) is detachably connected to the mounting groove (4); the outer portion of the lower sleeve (2) is provided with a plurality of slots (5) corresponding to the mounting groove (4); the bottom end of the spring sheet (3) is inserted into the slot (5); a fixing block (6) is provided in the mounting groove (4); the spring sheet (3) is provided with a groove (304); the fixing block (6) is inserted into the groove (304); and the fixing block (6) is provided with a movable limiting component.

2. The directional well casing straightening device according to claim 1, characterized in that: The limiting assembly comprises a slide groove (601) and two symmetrically arranged L-shaped sliding blocks (602); the slide groove (601) is arranged inside the fixed block (6); the horizontal section of the L-shaped sliding block (602) slides along the slide groove (601); one end of the horizontal section of the L-shaped sliding block (602) can extend outside the fixed block (6); one end of the vertical section of the L-shaped sliding block (602) is located outside the fixed block (6).

3. The directional well casing straightening device according to claim 2, characterized in that: Two opposite side walls of the installation groove (4) are respectively provided with limiting grooves (401), and one end of the horizontal section of the L-shaped sliding block (602) away from the vertical section can be inserted into the limiting groove (401).

4. The directional well casing straightening device according to claim 3, characterized in that: It also includes a limiting bolt (7), and a first threaded hole connected to the limiting groove (401) is provided on two opposite side walls of the installation groove (4), and a second threaded hole (6021) is provided at one end of the horizontal section of the L-shaped sliding block (602), and the limiting bolt (7) passes through the first threaded hole and is connected to the second threaded hole (6021).

5. The directional well casing straightening device according to claim 3, characterized in that: A spring (604) is provided between the two L-shaped slide blocks (602), and both ends of the spring (604) are respectively fixedly connected to the vertical sections of the L-shaped slide blocks (602).

6. The directional well casing straightening device according to claim 5, characterized in that: A sliding rod (603) is provided inside the fixed block (6), and the sliding rod (603) is arranged parallel to the top of the sliding groove (601), and the vertical section of the L-shaped sliding block (602) is slidably connected to the sliding rod (603).

7. The directional well casing straightening device according to claim 6, characterized in that: The spring (604) is sleeved outside the sliding rod (603).

8. The directional well casing straightening device according to claim 1, characterized in that: The spring plate (3) is composed of an upper connecting plate (301), an arc-shaped plate (302), and a lower connecting plate (303); the upper connecting plate (301) and the lower connecting plate (303) are respectively fixed to the top and bottom ends of the arc-shaped plate (302); the upper connecting plate (301) is located in the mounting groove (4), and the lower connecting plate (303) is located in the slot (5).

9. The directional well casing straightening device according to claim 8, characterized in that: A ball bearing (306) is provided in the middle of the arc-shaped plate (302).

10. The directional well casing straightening device according to claim 8, characterized in that: The side wall of the slot (5) is provided with a fixing bolt (501), the lower connecting plate (303) is provided with a fixing hole (305), and the fixing bolt (501) is connected to the fixing hole (305).

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