Integrated elastic centralizer

Abstract

The utility model relates to the field of oil drilling equipment, in particular to an integrated elastic centralizer which comprises a pipe body extending up and down, an installation groove is formed in the pipe body, an elastic piece bending and protruding outwards is arranged in the installation groove, the lower end of the elastic piece is fixedly connected with the pipe body, a guide rail is installed in the installation groove, and a sliding block is installed on the guide rail in a sliding mode. The upper ends of the elastic pieces are installed on the sliding blocks, the upper portions of the sliding blocks extend out of the installation grooves, the pipe body is sleeved with adjusting sleeves used for pushing the sliding blocks to slide so as to control the bending degree of the elastic pieces, adjusting threads are arranged on the outer wall of the pipe body, the adjusting sleeves are in threaded fit with the adjusting threads, and the installation grooves extend up and down. The multiple installation grooves are arranged around the pipe body at intervals. According to the integrated elastic centralizer, vertical movement can be achieved by rotating the adjusting sleeve, the sliding block is pushed to slide, the bending degree of the elastic piece is changed, and therefore the centralizer has wide application prospects in drilling operation of petroleum, natural gas and the like due to the complex and changeable borehole environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of petroleum drilling equipment, concretely relates to an integrated elastic centralizer. BACKGROUND

[0002] In the drilling and exploitation process of oil, natural gas and other resources, the control of well trajectory is crucial. As a key component connecting the wellhead and the oil layer, the casing may tilt, twist or displace due to changes in geological conditions or the influence of drilling operations. These problems can damage the stability of the oil well, thereby affecting the exploitation effect of oil. To solve these problems, we usually use a casing centralizer to ensure the stability of the casing, thereby ensuring the smooth progress of oil exploitation.

[0003] Traditional centralizers usually adopt a rigid structure, which can provide a certain supporting force, but are difficult to adapt to complex and variable wellbore environments, cannot adjust the centralizing diameter of the centralizer, and are prone to problems such as sticking and wear, affecting drilling efficiency and safety, and need to be improved. SUMMARY

[0004] The utility model aims at the above -mentioned problem provides a kind of integrated elastic centralizer that centralizing diameter is adjusted conveniently.

[0005] To achieve the above purpose, the utility model discloses an integrated elastic centralizer, which has the following structural characteristics: a pipe body extending upward and downward, an installation groove is provided on the pipe body, an elastic sheet curved outward and raised is provided in the installation groove, the lower end of the elastic sheet is fixedly connected with the pipe body, a guide rail is installed in the installation groove, a sliding block is slidably installed on the guide rail, the upper end of the elastic sheet is installed on the sliding block, the upper part of the sliding block protrudes out of the installation groove, an adjusting sleeve is provided on the pipe body for pushing the sliding block to slide and thereby controlling the bending degree of the elastic sheet, an adjusting screw thread is provided on the outer wall of the pipe body, and the adjusting sleeve is threadedly matched with the adjusting screw thread.

[0006] The installation groove provides installation space for the elastic sheet, and the elastic sheet curved outward and raised can contact the well wall and provide radial supporting force, and can adapt to the irregular shape of the wellbore and provide uniform supporting force. The cooperation of the guide rail and the sliding block realizes the slidable connection of the upper end of the elastic sheet, so that the bending degree of the elastic sheet is adjustable. The adjusting sleeve moves up and down through thread cooperation, pushes the sliding block to slide, and thereby changes the bending degree of the elastic sheet.

[0007] The installation groove extends upward and downward, and a plurality of installation grooves are provided. The plurality of installation grooves are arranged at intervals around the pipe body. The distribution of the plurality of installation grooves and the elastic sheets provides uniform radial supporting force, enhances the overall stability of the centralizer, improves the supporting capacity and adaptability of the centralizer, and the uniformly distributed structure reduces local stress concentration and prolongs the service life.

[0008] The lower part of the mounting groove is provided with a fixing base, and the lower end of the elastic sheet is fixedly installed on the fixing base.

[0009] The inner wall of the adjusting sleeve is provided with threads matched with the adjusting threads, and the adjusting sleeve is movably connected with the pipe body through the thread cooperation, so that the adjusting sleeve can be accurately moved up and down, and the adjusting capacity is stable.

[0010] The outer side of the upper part of the pipe body is provided with external threads for connecting the sleeve pipe, so that the pipe body and the sleeve pipe are connected in a simple and reliable manner.

[0011] The inner wall of the lower part of the pipe body is provided with internal threads for connecting the sleeve pipe, so that the pipe body and the sleeve pipe are connected in a simple and reliable manner.

[0012] The upper end of the elastic sheet is inserted into the positioning groove in the sliding block, and the screw is screwed on the sliding block and inserted into the elastic sheet, so that the upper end of the elastic sheet is stably connected with the sliding block.

[0013] The left and right widths of the mounting groove are greater than the left and right widths of the elastic sheet, so that the elastic sheet is provided with sufficient deformation space, and interference between the elastic sheet and the inner wall of the mounting groove in the deformation process is avoided.

[0014] The guide rail extends up and down along the mounting groove, so that the sliding block is ensured to slide in a predetermined direction, and the stability and precision of the sliding block are improved.

[0015] In order to facilitate the adjusting sleeve to push the sliding block, the sliding block is provided with a push block matched with the adjusting sleeve, and the push block abuts against the sliding block.

[0016] In summary, the elastic sheet is connected with the sliding block in a slidable manner, and the bending degree of the elastic sheet is adjustable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a sectional structural schematic view of the utility model;

[0019] Figure 3For Figure 2 Local enlarged structure diagram of point A in the middle.

[0020] In the figure: pipe body 1, adjusting sleeve 2, mounting groove 3, elastic sheet 4, guide rail 5, adjusting thread 6, sliding block 7, external thread 8, internal thread 9, fixing base 10, positioning groove 11, screw 12, push block 13. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0024] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The following is a description of the preferred embodiments of the present application in conjunction with the accompanying drawings.

[0026] The utility model provides an integral elastic centralizer, including the pipe body 1 of up and down extension, be equipped with the installation groove 3 on the pipe body 1, be equipped with the elastic sheet 4 that bends and bulges outward in the installation groove 3, the lower end of elastic sheet 4 is fixedly connected with the pipe body 1, is installed the guide rail 5 in the installation groove 3, the sliding block 7 of sliding installation is installed on the guide rail 5, the upper end of elastic sheet 4 is installed on the sliding block 7, the upper part of sliding block 7 projects out of the installation groove 3, the pipe body 1 is set with the adjusting sleeve 2 for pushing sliding block 7 to slide to control the bending degree of elastic sheet 4, the outer wall of pipe body 1 is equipped with adjusting screw thread 6, and adjusting sleeve 2 is screw thread matched with adjusting screw thread 6. Figure 1 The installation groove 3 provides mounting space for the elastic sheet 4, and the elastic sheet 4 that bends and bulges outward can contact the well wall and provide radial support force, and can adapt to the irregular shape of the wellbore to provide uniform support force. The cooperation of the guide rail 5 and the sliding block 7 realizes the slidable connection of the upper end of the elastic sheet 4, so that the bending degree of the elastic sheet 4 is adjustable. The adjusting sleeve 2 is moved up and down by screw thread cooperation, pushes the sliding block 7 to slide, and thus changes the bending degree of the elastic sheet 4.

[0027] The utility model discloses an integral elastic centralizer, including the pipe body 1 of up and down extension, be equipped with the installation groove 3 on the pipe body 1, be equipped with the elastic sheet 4 that bends and bulges outward in the installation groove 3, the lower end of elastic sheet 4 is fixedly connected with the pipe body 1, is installed the guide rail 5 in the installation groove 3, the sliding block 7 of sliding installation is installed on the guide rail 5, the upper end of elastic sheet 4 is installed on the sliding block 7, the upper part of sliding block 7 projects out of the installation groove 3, the pipe body 1 is set with the adjusting sleeve 2 for pushing sliding block 7 to slide to control the bending degree of elastic sheet 4, the outer wall of pipe body 1 is equipped with adjusting screw thread 6, and adjusting sleeve 2 is screw thread matched with adjusting screw thread 6. Figure 1 The installation groove 3 extends upward and downward, and a plurality of installation grooves 3 are arranged around the pipe body 1. The distribution of the plurality of installation grooves 3 and the elastic sheet 4 provides uniform radial support force, enhances the overall stability of the centralizer, improves the support capacity and adaptability of the centralizer, and the uniformly distributed structure reduces local stress concentration and prolongs the service life.

[0028] The utility model discloses an integral elastic centralizer, including the pipe body 1 of up and down extension, be equipped with the installation groove 3 on the pipe body 1, be equipped with the elastic sheet 4 that bends and bulges outward in the installation groove 3, the lower end of elastic sheet 4 is fixedly connected with the pipe body 1, is installed the guide rail 5 in the installation groove 3, the sliding block 7 of sliding installation is installed on the guide rail 5, the upper end of elastic sheet 4 is installed on the sliding block 7, the upper part of sliding block 7 projects out of the installation groove 3, the pipe body 1 is set with the adjusting sleeve 2 for pushing sliding block 7 to slide to control the bending degree of elastic sheet 4, the outer wall of pipe body 1 is equipped with adjusting screw thread 6, and adjusting sleeve 2 is screw thread matched with adjusting screw thread 6. Figure 2 The lower part of the installation groove 3 is provided with a fixed seat 10, and the lower end of the elastic sheet 4 is fixedly installed on the fixed seat 10. The fixed seat 10 provides a stable connection point for the lower end of the elastic sheet 4, ensures the controllable deformation of the elastic sheet 4, enhances the connection strength of the elastic sheet 4, prevents it from falling off or failing. The inner wall of the adjusting sleeve 2 is provided with a thread matched with the adjusting screw thread 6, and the adjusting sleeve 2 and the pipe body 1 are precisely moved up and down by screw thread cooperation, providing stable adjustment capacity and ensuring the controllable bending degree of the elastic sheet 4. The outer thread 8 for connecting the casing is arranged on the outer side of the upper part of the pipe body 1, the connection is simple and reliable, the installation difficulty is reduced, and the connection of the centralizer and the casing is facilitated. The inner thread 9 for connecting the casing is arranged on the inner wall of the lower part of the pipe body 1, the connection is simple and reliable, the installation difficulty is reduced, and the connection of the centralizer and the casing is facilitated.

[0029] The utility model discloses an integral elastic centralizer, including the pipe body 1 of up and down extension, be equipped with the installation groove 3 on the pipe body 1, be equipped with the elastic sheet 4 that bends and bulges outward in the installation groove 3, the lower end of elastic sheet 4 is fixedly connected with the pipe body 1, is installed the guide rail 5 in the installation groove 3, the sliding block 7 of sliding installation is installed on the guide rail 5, the upper end of elastic sheet 4 is installed on the sliding block 7, the upper part of sliding block 7 projects out of the installation groove 3, the pipe body 1 is set with the adjusting sleeve 2 for pushing sliding block 7 to slide to control the bending degree of elastic sheet 4, the outer wall of pipe body 1 is equipped with adjusting screw thread 6, and adjusting sleeve 2 is screw thread matched with adjusting screw thread 6. Figure 3 A positioning groove 11 is arranged in the sliding block 7, and the upper end of the elastic sheet 4 is inserted into the positioning groove 11. A screw 12 is screwed onto the sliding block 7 and inserted into the elastic sheet 4, realizing the stable connection of the upper end of the elastic sheet 4 and the sliding block 7. The cooperation of the positioning groove 11 and the screw 12 enhances the reliability of the connection and prevents the elastic sheet 4 from falling off.

[0030] The utility model discloses an integral elastic centralizer, including the pipe body 1 of up and down extension, be equipped with the installation groove 3 on the pipe body 1, be equipped with the elastic sheet 4 that bends and bulges outward in the installation groove 3, the lower end of elastic sheet 4 is fixedly connected with the pipe body 1, is installed the guide rail 5 in the installation groove 3, the sliding block 7 of sliding installation is installed on the guide rail 5, the upper end of elastic sheet 4 is installed on the sliding block 7, the upper part of sliding block 7 projects out of the installation groove 3, the pipe body 1 is set with the adjusting sleeve 2 for pushing sliding block 7 to slide to control the bending degree of elastic sheet 4, the outer wall of pipe body 1 is equipped with adjusting screw thread 6, and adjusting sleeve 2 is screw thread matched with adjusting screw thread 6.Figure 1 The left and right widths of the mounting groove 3 are greater than the left and right widths of the elastic sheet 4, which provides sufficient deformation space for the elastic sheet 4, avoids interference between the elastic sheet 4 and the inner wall of the mounting groove 3 during deformation, and improves the flexibility and stability of deformation. The guide rail 5 extends up and down along the mounting groove 3, ensuring that the sliding block 7 slides in a predetermined direction, improving the stability and precision of the sliding of the sliding block 7, and ensuring that the deformation of the elastic sheet 4 is uniform and controllable. In order to facilitate the adjustment of the sleeve 2 to push the sliding block 7, the sliding block 7 is provided with a push block 13 for cooperating with the adjustment sleeve 2, and the push block 13 abuts against the sliding block 7.

[0031] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An integrated elastic centralizer comprising a pipe body (1) extending upward and downward, characterized in that, The pipe body (1) is provided with an installation groove (3), the installation groove (3) is provided with an outwardly curved elastic sheet (4), the lower end of the elastic sheet (4) is fixedly connected with the pipe body (1), the installation groove (3) is provided with a guide rail (5), the guide rail (5) is slidably provided with a sliding block (7), the upper end of the elastic sheet (4) is installed on the sliding block (7), the upper part of the sliding block (7) protrudes out of the installation groove (3), the pipe body (1) is provided with an adjusting sleeve (2) for pushing the sliding block (7) to slide, thereby controlling the bending degree of the elastic sheet (4), the outer wall of the pipe body (1) is provided with an adjusting screw thread (6), and the adjusting sleeve (2) is screwed with the adjusting screw thread (6).

2. The integral elastic centralizer as claimed in claim 1, wherein, The installation groove (3) extends upward and downward, and the installation groove (3) is provided with a plurality of installation grooves (3), and the plurality of installation grooves (3) are arranged at intervals around the pipe body (1).

3. The integral elastic centralizer of claim 1, wherein, The lower part of the installation groove (3) is provided with a fixing seat (10), and the lower end of the elastic sheet (4) is fixedly installed on the fixing seat (10).

4. The integral elastic centralizer of claim 1, wherein, The inner wall of the adjusting sleeve (2) is provided with a screw thread matched with the adjusting screw thread (6).

5. The integral elastic centralizer of claim 1, wherein, The outer side of the upper part of the pipe body (1) is provided with an outer screw thread (8) for connecting a sleeve.

6. The integral elastic centralizer of claim 1, wherein, The inner wall of the lower part of the pipe body (1) is provided with an inner screw thread (9) for connecting a sleeve.

7. The integral elastic centralizer of claim 1, wherein, The sliding block (7) is provided with a positioning groove (11), and the upper end of the elastic sheet (4) is inserted into the positioning groove (11), and the sliding block (7) is screwed with a screw (12) inserted into the elastic sheet (4).

8. The integral elastic centralizer of claim 1, wherein, The left and right widths of the installation groove (3) are greater than the left and right widths of the elastic sheet (4).

9. The integral elastic centralizer of claim 1, wherein, The guide rail (5) extends upward and downward along the installation groove (3).

10. The integral elastic centralizer of claim 1, wherein, The sliding block (7) is provided with a push block (13) matched with the adjusting sleeve (2), and the push block (13) abuts against the sliding block (7).

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