Hydraulic casing centralizer with high well cementation quality

Abstract

The utility model discloses a hydraulic casing centralizer with high well cementation quality, which belongs to the technical field of well drilling, and comprises a correction box used for correcting the position of a casing in the installation process of the casing, one side of the inner wall of the correction box is fixedly connected with a connecting plate, and the other side of the inner wall of the correction box is fixedly connected with the connecting plate. A mounting shell is fixedly connected to one side of the correcting box; and a centering mechanism. The middle position of the casing pipe is limited through the correcting ring fixed to one side of the connecting plate, other faces of the casing pipe are limited and clamped through the other three correcting rings, and when cement paste generates impact force on the casing pipe, the casing pipe extrudes one of the three correcting rings at will, so that the casing pipe is prevented from being damaged. Other correcting rings are driven by gas to apply clamping force to the casing pipe again when cement paste is poured, the stability of the casing pipe is improved when the cement paste is poured, and the correcting mode avoids the situation that a conventional correcting mode easily enables a pipeline body to incline or deviate when the cement paste is poured, and the stability of the pipeline during installation is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling, in particular to a hydraulic casing centralizer with high cementing quality. Background Art

[0002] Drilling refers to the process of drilling holes underground or underwater using a drill bit, drilling tools and related equipment. Drilling technology is widely used in many fields such as oil, natural gas, geological exploration, mineral resource mining, and water well drilling. Drilling can help us obtain underground resources, conduct geological analysis, or build underground facilities. During the drilling process, in order to ensure the correct position of the casing in the wellbore, ensure the verticality of the casing and the stability of the well wall, and prevent the casing from shifting or deforming, casing straightening equipment will be used. However, traditional hydraulic casings will shift after long-term use and do not have a straightening function, which affects the use of the pipeline.

[0003] After searching, the Chinese patent "A Hydraulic Casing Righting Device" authorization announcement number is "CN217736512U". When this utility model is used, the pipe body is inserted into the interior of the box through the through-hole, and the pipe body will be located on the top of the arc-shaped support plate. Under the action of the hydraulic cylinder, the arc-shaped extrusion plate is driven to move downward, and then the arc-shaped extrusion plate is driven to squeeze the pipe body, thereby limiting the pipe body. When the pipe body is offset, the movable plate is squeezed under the action of the spring, so that the movable plate drives the arc-shaped straightening plate to straighten the pipe body. With the cooperation of the pulley, the friction between the arc-shaped straightening plate and the pipe body is reduced, making it easier to straighten the pipe body.

[0004] Although the above method uses a spring to drive the arc-shaped straightening plate to straighten the pipeline body, due to the elasticity of the spring, when the pipeline is inserted into the wellbore, during the process of pouring cement slurry between the pipeline and the wellbore, the cement slurry will generate impact force and extrusion force to press the spring, causing the spring to drive the pipeline body to oscillate back and forth. After the cement slurry is injected, the spring is squeezed in irregular directions, which can easily cause the pipeline body to tilt or deviate, affecting the stability of the pipeline during installation.

[0005] Based on this, the utility model is designed to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a hydraulic casing centralizer with high cementing quality.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A hydraulic casing straightener with high cementing quality, comprising a correction box for correcting the position of the casing during its installation, a connecting plate fixedly connected to one side of the inner wall of the correction box, and a mounting shell fixedly connected to one side of the correction box; a centering mechanism, the centering mechanism comprising a correction rod located on one side of the correction box, the inner cavity of the correction box being provided with four correction rings in a circular array, one side of one of the correction rings being fixedly connected to one end of the correction rod, and another correction ring being fixedly connected to one side of the connecting plate.

[0009] Furthermore, the centering mechanism also includes a hydraulic rod fixedly connected to one side of the mounting shell, the telescopic end of the hydraulic rod is fixedly connected to a correction cylinder, the correction cylinder is slidably connected to one side of the correction box, the inner cavity of the correction cylinder is provided with a first piston, one side of the first piston is fixedly connected to one end of the correction rod, the top and bottom of the correction cylinder are connected to an air distribution pipe, the other end of the air distribution pipe is connected to a collecting cylinder, the collecting cylinder is fixedly connected to one side of the correction box, the inner cavity of the collecting cylinder is provided with a second piston, one side of the second piston is fixedly connected to an auxiliary rod, the other ends of the two auxiliary rods pass through the inner cavity of the correction box and are fixedly connected to one side of the other two correction rings.

[0010] Furthermore, a rubber pad is fixedly connected to one side of the correction ring, and one side of the correction ring and the rubber pad are both arranged in an arc shape.

[0011] Furthermore, the inner walls of the correction cylinder and the collection cylinder are fixedly connected to a limiting ring, and the limiting ring is located on one side of the gas distribution pipe.

[0012] Furthermore, both ends of the gas distribution pipe are fixedly connected with sealing rings, and the other ends of the two sealing rings are fixedly connected to one side of the correction cylinder and the collection cylinder respectively.

[0013] Furthermore, one end of the correction cylinder is fixedly connected to a spring, and the other end of the spring is fixedly connected to one side of one of the correction rings.

[0014] Furthermore, a positioning ring is fixedly connected to the outer surface of the hydraulic rod, and one side of the positioning ring is fixedly connected to one side of the mounting shell.

[0015] Furthermore, two threaded plates are symmetrically fixedly connected to both sides of the correction box, and the inner cavities of the threaded plates are threadedly connected to positioning pins. Beneficial effects

[0016] 1. The centering position of the casing is limited by a correction ring fixed to one side of the connecting plate, and the other surfaces of the casing are limited and clamped by three other correction rings. When the cement slurry exerts an impact force on the casing, any pressure of the casing on one of the three correction rings will drive the other correction rings to re-clamp the casing through gas, thereby improving the stability of the casing during cement slurry pouring. This righting method avoids the conventional righting method that easily causes the pipe body to tilt or deflect during cement slurry pouring, affecting the stability of the pipe during installation;

[0017] 2. Through the threaded plate and positioning nails, the positioning nails are screwed and inserted into the soil to fix the entire equipment, preventing the entire equipment from displacement or shaking when the casing is installed, thereby improving the stability of the casing during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0019] Figure 1 This is a three-dimensional diagram of the main structure of a hydraulic casing centralizer with high cementing quality according to the utility model;

[0020] Figure 2 This is a cross-sectional view of a hydraulic casing centralizer structure with high cementing quality according to the utility model;

[0021] Figure 3 This is a centering mechanism diagram of a hydraulic casing centralizer structure with high cementing quality according to the utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] The numbers in the figure represent:

[0024] 1. Correction box; 2. Connecting plate; 3. Threaded plate; 4. Positioning pin; 5. Mounting shell; 6. Centering mechanism; 601. Hydraulic rod; 602. Correction cylinder; 603. First piston; 604. Correction rod; 605. Air distribution pipe; 606. Collecting cylinder; 607. Second piston; 608. Auxiliary rod; 609. Correction ring; 610. Rubber pad; 611. Limiting ring; 612. Sealing ring; 613. Spring; 614. Positioning ring. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] In some embodiments, please refer to the appendix of the specification. Figure 1-4 A hydraulic casing straightener with high cementing quality includes a correction box 1 for correcting the position of the casing during installation, a connecting plate 2 is fixedly connected to one side of the inner wall of the correction box 1, and a mounting shell 5 is fixedly connected to one side of the correction box 1; a centering mechanism 6, the centering mechanism 6 includes a correction rod 604 located on one side of the correction box 1, and the inner cavity of the correction box 1 is provided with four correction rings 609 in a circular array, one side of one correction ring 609 is fixedly connected to one end of the correction rod 604, and the other correction ring 609 is fixedly connected to one side of the connecting plate 2.

[0028] One of the correction rings 609 is fixed by the connecting plate 2, and the center position of the casing is limited by the correction ring 609 fixed on one side of the connecting plate 2, and the other surfaces of the casing are limited and clamped by the other three correction rings 609. When the cement slurry generates an impact force on the casing, the casing squeezes any one of the three correction rings 609, and the gas will drive the other correction rings 609 to apply clamping force to the casing again, thereby improving the stability of the casing when pouring cement slurry. This straightening method avoids the conventional straightening method that easily causes the pipeline body to tilt or shift when pouring cement slurry, affecting the stability of the pipeline during installation.

[0029] In an embodiment of the present utility model, the centering mechanism 6 also includes a hydraulic rod 601 fixedly connected to one side of the mounting shell 5, the telescopic end of the hydraulic rod 601 is fixedly connected to the correction cylinder 602, the correction cylinder 602 is slidably connected to one side of the correction box 1, the inner cavity of the correction cylinder 602 is provided with a first piston 603, one side of the first piston 603 is fixedly connected to one end of the correction rod 604, the top and bottom of the correction cylinder 602 are both connected to the air distribution pipe 605, the other end of the air distribution pipe 605 is connected to the collecting cylinder 606, the collecting cylinder 606 is fixedly connected to one side of the correction box 1, the inner cavity of the collecting cylinder 606 is provided with a second piston 607, one side of the second piston 607 is fixedly connected to the auxiliary rod 608, the other ends of the two auxiliary rods 608 pass through the inner cavity of the correction box 1 and are fixedly connected to one side of the other two correction rings 609.

[0030] First, place the sleeve between the four correction rings 609, and use the hydraulic rod 601 to drive the correction cylinder 602 to one side of the sleeve, and push the other side of the sleeve to fit the correction ring 609 on one side of the connecting plate 2. When the correction ring 609 at one end of the correction rod 604 is under pressure, it pushes the first piston 603 to move, and discharges the gas in the correction cylinder 602 into the collecting cylinder 606 through the gas distribution pipe 605 for aggregation. Then, the second piston 607 and the auxiliary rod 608 are squeezed by the gas, and the correction ring 609 at one end of the auxiliary rod 608 is pushed to clamp and limit the other two sides of the sleeve.

[0031] In the embodiment of the present invention, a rubber pad 610 is fixedly connected to one side of the correction ring 609 , and one side of the correction ring 609 and the rubber pad 610 are both arranged in an arc shape.

[0032] The rubber pad 610 can be used to prevent the sleeve from sliding on the inner wall of the correction ring 609 after the sleeve is centered, thereby improving the stability of the sleeve.

[0033] In an example of the present invention, the inner walls of the correction tube 602 and the collection tube 606 are fixedly connected with a limit ring 611 , and the limit ring 611 is located on one side of the gas distribution pipe 605 .

[0034] The limiting ring 611 can be used to limit the moving positions of the first piston 603 and the second piston 607 when they move, so as to prevent the first piston 603 or the second piston 607 from blocking the air outlet and the air inlet of the air distribution pipe 605.

[0035] In some embodiments, as Figure 2 、 Figure 3 and Figure 4 As shown, as a preferred embodiment of the present invention, both ends of the gas distribution pipe 605 are fixedly connected with sealing rings 612, and the other ends of the two sealing rings 612 are fixedly connected to one side of the correction cylinder 602 and the collection cylinder 606 respectively.

[0036] The sealing ring 612 is used to seal the connection between the gas distribution pipe 605, the correction cylinder 602 and the collection cylinder 606.

[0037] In the embodiment of the present invention, one end of the correction cylinder 602 is fixedly connected to a spring 613 , and the other end of the spring 613 is fixedly connected to one side of one of the correction rings 609 .

[0038] Through the spring 613, when the cement slurry injected between the casing and the wellbore cools down, the hydraulic rod 601 drives the correction cylinder 602 to be recovered. The spring 613 no longer applies pressure, which will drive the first piston 603 to rebound, causing the gas in the collecting cylinder 606 to flow back, and then the three correction rings 609 are moved away from the casing, and the entire equipment is taken out.

[0039] In the embodiment of the present invention, a positioning ring 614 is fixedly connected to the outer surface of the hydraulic rod 601 , and one side of the positioning ring 614 is fixedly connected to one side of the mounting shell 5 .

[0040] The positioning ring 614 is used to fix the hydraulic rod 601 .

[0041] In some embodiments, as Figure 1 As shown, as a preferred embodiment of the present invention, two threaded plates 3 are symmetrically fixedly connected to both sides of the correction box 1, and the inner cavity of the threaded plate 3 is threadedly connected to a positioning pin 4.

[0042] Through the threaded plate 3 and the positioning pin 4, the positioning pin 4 is screwed and inserted into the soil to fix the entire device, preventing the entire device from displacement or shaking when the casing is installed, thereby improving the stability of the casing during installation.

[0043] It should be noted that the threaded plate 3, positioning pin 4, hydraulic rod 601 and spring 613 in the above description are all relatively mature devices in existing technology applications. The specific models can be selected according to actual needs. At the same time, the hydraulic rod 601 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hydraulic casing centralizer with high cementing quality, comprising a correction box (1) for correcting the position of the casing during its installation, characterized in that: A connecting plate (2) is fixedly connected to one side of the inner wall of the correction box (1), and a mounting shell (5) is fixedly connected to one side of the correction box (1); A centering mechanism (6), the centering mechanism (6) includes a correction rod (604) located on one side of the correction box (1), the inner cavity of the correction box (1) is provided with four correction rings (609) in a circular array, one side of one of the correction rings (609) is fixedly connected to one end of the correction rod (604), and another correction ring (609) is fixedly connected to one side of the connecting plate (2).

2. The hydraulic casing centralizer with high cementing quality according to claim 1 is characterized in that: The centering mechanism (6) further comprises a hydraulic rod (601) fixedly connected to one side of the mounting shell (5), the telescopic end of the hydraulic rod (601) is fixedly connected to a correction cylinder (602), the correction cylinder (602) is slidably connected to one side of the correction box (1), the inner cavity of the correction cylinder (602) is provided with a first piston (603), one side of the first piston (603) is fixedly connected to one end of the correction rod (604), and the top and bottom of the correction cylinder (602) are both connected. There is an air distribution pipe (605), the other end of the air distribution pipe (605) is connected to a collecting tube (606), the collecting tube (606) is fixedly connected to one side of the correction box (1), the inner cavity of the collecting tube (606) is provided with a second piston (607), one side of the second piston (607) is fixedly connected to an auxiliary rod (608), and the other ends of the two auxiliary rods (608) pass through the inner cavity of the correction box (1) and are fixedly connected to one side of the other two correction rings (609).

3. The hydraulic casing centralizer with high cementing quality according to claim 1, characterized in that: One side of the correction ring (609) is fixedly connected to a rubber pad (610), and one side of the correction ring (609) and the rubber pad (610) are both arranged in an arc shape.

4. The hydraulic casing centralizer with high cementing quality according to claim 2, characterized in that: The inner walls of the correction cylinder (602) and the collection cylinder (606) are both fixedly connected to a limiting ring (611), and the limiting ring (611) is located on one side of the gas distribution pipe (605).

5. The hydraulic casing centralizer with high cementing quality according to claim 2, characterized in that: Both ends of the gas distribution pipe (605) are fixedly connected to sealing rings (612), and the other ends of the two sealing rings (612) are fixedly connected to one side of the correction cylinder (602) and the collection cylinder (606), respectively.

6. The hydraulic casing centralizer with high cementing quality according to claim 2, characterized in that: One end of the correction cylinder (602) is fixedly connected to a spring (613), and the other end of the spring (613) is fixedly connected to one side of one of the correction rings (609).

7. The hydraulic casing centralizer with high cementing quality according to claim 2, characterized in that: A positioning ring (614) is fixedly connected to the outer surface of the hydraulic rod (601), and one side of the positioning ring (614) is fixedly connected to one side of the mounting shell (5).

8. The hydraulic casing centralizer with high cementing quality according to claim 1, characterized in that: Two threaded plates (3) are symmetrically fixedly connected to both sides of the correction box (1), and the inner cavities of the threaded plates (3) are threadedly connected to positioning pins (4).

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