Stabilizer for geological drilling

Abstract

The stabilizer for geological drilling comprises a stabilizer body, stabilizing sleeves are arranged at the two ends of the stabilizer body correspondingly, a plurality of fixing blocks are arranged on the side wall of the stabilizer body at equal intervals, inclined blocks are arranged on the sides, close to the stabilizing sleeves, of the fixing blocks, the inclined blocks are fixedly connected with the side wall of the stabilizer body, and fixing grooves are formed in the fixing blocks; a centralizing block is arranged on the fixing block, the centralizing block is located in the fixing groove, and a connecting assembly used for connecting the centralizing block with the fixing block is arranged in the fixing block. The stabilizer body is used for controlling the drilling direction in the drilling process, the fixing blocks are installed on the stabilizer body at equal intervals, the centralizing blocks are installed on the fixing blocks, it is guaranteed that a drilled hole is straight through the centralizing blocks, the stabilizer body is prevented from being in direct frictional contact with the well wall, side wall abrasion of the stabilizer body is reduced, and the stabilizer is protected. And the drilling fluency of the stabilizer body is improved through the inclined block, and the possibility of drill jamming is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of drill tool stabilizers, and in particular to a stabilizer for geological drilling. Background Art

[0002] In geological exploration, drilling is often used to explore the geology. During the drilling process, a drilling stabilizer is generally needed to straighten the drill pipe to ensure that the axis of the drill bit is as close to the center of the borehole as possible. The stabilizer mainly plays a pointing and straightening role in the drill tool assembly. The installation position of the stabilizer controls the well inclination angle and the wellbore curvature within the specified range, and also concentrates most of the weight of the drill collar on the drill bit, reducing the non-wellbore center force and other external forces on the drill string and the drill bit. With the development of stabilizers and the large-scale exploitation of horizontal wells and directional wells, stabilizers have become an indispensable bottom hole drilling tool in modern wellbore trajectory control technology.

[0003] The existing stabilizer rubs against the well wall for a long time, which easily causes damage to the side wall of the stabilizer. The stabilizer needs to be replaced frequently, which is very inconvenient to operate, affects the drilling efficiency, and shortens the service life of the device. Utility Model Content

[0004] In order to reduce the friction between the stabilizer and the well wall and protect the stabilizer, the present application provides a stabilizer for geological drilling.

[0005] The present application provides a stabilizer for geological drilling, which adopts the following technical solution:

[0006] A stabilizer for geological drilling comprises a stabilizer body, both ends of the stabilizer body are provided with stabilizing sleeves, a plurality of fixed blocks are arranged at equal intervals on the side wall of the stabilizer body, a tilting block is arranged on the side of the fixed block close to the stabilizing sleeve, the tilting block is fixedly connected to the side wall of the stabilizer body, a fixing groove is opened on the fixed block, a straightening block is arranged on the fixed block, the straightening block is located in the fixing groove, and a connecting component for connecting the straightening block with the fixed block is arranged in the fixed block.

[0007] By adopting the above technical scheme, the stabilizer body is used to control the drilling direction during the drilling process, the fixed blocks are installed on the stabilizer body at equal intervals, and the straightening blocks are installed on the fixed blocks. The straightening blocks are used to ensure the straightness of the drill hole, avoid direct friction contact between the stabilizer body and the well wall, reduce the side wall wear of the stabilizer body, protect the stabilizer, improve the smoothness of drilling of the stabilizer body by the tilting block, reduce the possibility of drill sticking, and realize the detachable connection between the straightening block and the fixed block by the connecting assembly, so that the straightening block on the fixed block can be replaced and maintained conveniently.

[0008] Optionally, two receiving grooves connected to the fixing groove are provided in the fixing block, and the two receiving grooves are close to different stabilizing sleeves. The connecting assembly includes a connecting plate and a connecting spring located in the receiving groove. The connecting plate is movably connected to the fixing block, and the connecting spring is located on the side of the connecting plate close to the receiving groove. Both ends of the connecting spring are fixedly connected to the connecting plate and the fixing block. A connecting block is provided on the side of the connecting plate away from the connecting spring. When the connecting spring is in a natural state, the connecting block is located in the fixing groove, and connecting grooves matching the connecting blocks are provided on both sides of the straightening block.

[0009] By adopting the above technical solution, when the straightening block extends into the accommodating groove, the connecting block extends into the connecting groove on the straightening block, and the connecting spring limits the position of the connecting plate and the connecting block, thereby improving the stability of the connection between the straightening block and the fixed block. When the straightening block needs to be separated from the fixed block, the connecting plate is moved in the direction of the connecting spring, the connecting spring is compressed, and the connecting block is disengaged from the connecting groove, thereby taking the straightening block out of the accommodating groove on the fixed block and replacing the straightening block.

[0010] Optionally, a side of the connection block away from the stabilizer body is provided with an inclined surface along a side close to the accommodating groove and in a direction away from the accommodating groove.

[0011] By adopting the above technical solution, the connecting block can be conveniently inserted into the connecting groove through the inclined surface.

[0012] Optionally, a first connecting tooth is provided on a side of the connecting plate close to the stabilizer body, a first gear is rotatably connected inside the fixing block, and the first gear is meshed with the first connecting tooth on the connecting plate.

[0013] By adopting the above technical solution, the position of the connecting plate can be conveniently adjusted through the first connecting teeth by rotating the first gear.

[0014] Optionally, an intermediate plate is provided in the fixed block, the intermediate plate is located on the side of the first gear away from the connecting plate, the side wall of the intermediate plate is provided with second connecting teeth, and the first gear is meshed with the second connecting teeth on the intermediate plate.

[0015] By adopting the above technical solution, the middle plate is moved, thereby driving the first gear to rotate, thereby facilitating the movement of the connecting plate.

[0016] Optionally, a driving groove is provided on the side wall of the fixed block, a driving plate movably connected to the fixed block is provided in the driving groove, the driving plate extends into the fixed block, third connecting teeth are provided on both sides of the driving plate, two second gears located on both sides of the driving plate are provided in the fixed block, the two second gears are meshed with the third connecting teeth on both sides of the driving plate, and fourth connecting teeth are provided on the side of the middle plate close to the second gear, and the second gear is meshed with the fourth connecting teeth on the middle plate.

[0017] By adopting the above technical solution, the driving plate is moved away from the driving groove, driving the second gear to rotate, and the middle plate is driven to move through the third connecting tooth, thereby driving the first gear to rotate, so that the connecting plate moves in the direction of the connecting spring, making it easier for the connecting block to be disengaged from the connecting groove.

[0018] Optionally, a protective plate for covering the driving slot is provided on the fixed block, one side of the protective plate is hinged to the fixed block, and the other side is provided with an insert, and a groove matching the insert is opened on the fixed block, and the insert is located in the groove and has an interference fit with the fixed block.

[0019] By adopting the above technical solution, when the stabilizer is in working state, the driving plate is located in the driving groove, the embedded piece is located in the embedded groove and is interference fit with the fixed block, and the protective plate protects the driving plate in the driving groove. When the driving plate needs to be moved, the embedded piece is taken out of the embedded groove and the protective plate is opened, thereby moving the driving plate.

[0020] Optionally, a plurality of wear-resistant strips are obliquely arranged on a side of the straightening block away from the stabilizer body, and the plurality of wear-resistant strips are equidistantly arranged along the length direction of the straightening block.

[0021] By adopting the above technical solution, the wear resistance of the stabilizer body is improved by the wear-resistant strips, and the wear-resistant strips are arranged at equal intervals along the length direction of the straightening block, so as to evenly disperse the stress and facilitate use.

[0022] Optionally, a plurality of wear-resistant protrusions are provided on a side of the wear-resistant strip away from the stabilizer body.

[0023] By adopting the above technical solution, the wear-resistant properties of the wear-resistant strip are improved through the wear-resistant protrusions.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] The stabilizer body is used to control the drilling direction during the drilling process. The fixed blocks are installed on the stabilizer body at equal intervals, and the straightening blocks are installed on the fixed blocks. The straightening blocks are used to ensure the straightness of the drill hole, avoid direct friction contact between the stabilizer body and the well wall, reduce the wear of the side wall of the stabilizer body, and protect the stabilizer. The tilting blocks are used to improve the smoothness of the drilling of the stabilizer body and reduce the possibility of the drill sticking phenomenon. The detachable connection between the straightening block and the fixed block is achieved through the connecting assembly, which is convenient for the replacement and maintenance of the straightening block on the fixed block.

[0026] When the straightening block extends into the accommodating groove, the connecting block extends into the connecting groove on the straightening block, and the connecting spring limits the position of the connecting plate and the connecting block, thereby improving the stability of the connection between the straightening block and the fixed block. When the straightening block needs to be separated from the fixed block, the connecting plate is moved in the direction of the connecting spring, the connecting spring is compressed, and the connecting block is disengaged from the connecting groove, thereby taking the straightening block out of the accommodating groove on the fixed block and replacing the straightening block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the overall structure of a stabilizer for geological drilling.

[0028] Figure 2 It is a schematic diagram for showing the structure of the connection components in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram for showing the connection relationship between the drive plate and the second gear in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram for showing the connection relationship between the protection plate and the fixing block in the embodiment of the present application.

[0031] Explanation of the reference numerals: 1. Stabilizer body; 11. Stabilizing sleeve; 12. Tilting block; 2. Fixing block; 21. Fixing groove; 22. Accommodating groove; 23. Embedding groove; 3. Straightening block; 31. Wear-resistant strip; 311. Wear-resistant protrusion; 4. Connecting assembly; 41. Connecting block; 42. Connecting plate; 421. First connecting tooth; 43. Connecting spring; 5. Intermediate plate; 51. Second connecting tooth; 52. Fourth connecting tooth; 6. Driving plate; 61. Third connecting tooth; 7. First gear; 8. Second gear; 9. Protective plate; 91. Embedded plate. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] The embodiment of the present application discloses a stabilizer for geological drilling.

[0034] Reference Figure 1A stabilizer for geological drilling includes a stabilizer body 1. Stabilizer sleeves 11 are installed at both ends of the stabilizer body 1. The inner wall of the stabilizer sleeve 11 is provided with threads. The stabilizer body 1 is connected to the drill rod through the stabilizer sleeve 11. The stabilizer body 1 is used to control the drilling direction during the drilling process.

[0035] Reference Figure 1 A plurality of fixed blocks 2 are fixedly installed at equal intervals on the side wall of the stabilizer body 1. A tilting block 12 is installed on the side of the fixed block 2 close to the stabilizer sleeve 11. The tilting block 12 is fixedly connected to the side wall of the stabilizer body 1. The tilting block 12 improves the smoothness of the stabilizer body 1 during drilling and reduces the possibility of drill jamming. A fixing groove 21 is provided on the fixed block 2. A straightening block 3 is movably installed on the fixed block 2. The straightening block 3 is located in the fixing groove 21. The fixed blocks 2 are installed at equal intervals on the stabilizer body 1. The straightening block 3 is installed on the fixed block 2. The straightening block 3 ensures that the drill hole is straight, avoids direct friction contact between the stabilizer body 1 and the well wall, reduces the wear of the side wall of the stabilizer body 1, and protects the stabilizer.

[0036] Reference Figure 2 and Figure 3 Two receiving grooves 22 connected to the fixing groove 21 are provided in the fixing block 2, and the two receiving grooves 22 are close to different stabilizing sleeves 11. A connecting component 4 for connecting the straightening block 3 with the fixing block 2 is provided in the fixing block 2. The straightening block 3 and the fixing block 2 are detachably connected through the connecting component 4, which is convenient for replacing and maintaining the straightening block 3 on the fixing block 2. The connecting component 4 includes a connecting plate 42 and a connecting spring 43 located in the receiving groove 22. The connecting plate 42 is movably connected to the fixing block 2, and the connecting spring 43 is located on the side of the connecting plate 42 close to the receiving groove 22. Both ends of the connecting spring 43 are fixedly connected to the connecting plate 42 and the fixing block 2. A connecting block 41 is fixedly installed on the side of the connecting plate 42 away from the connecting spring 43. When the connecting spring 43 is in a natural state, the connecting block 41 is located in the fixing groove 21, and connecting grooves matching the connecting block 41 are provided on both sides of the straightening block 3. When the straightening block 3 extends into the accommodating groove 22, the connecting block 41 extends into the connecting groove on the straightening block 3, and the connecting spring 43 limits the position of the connecting plate 42 and the connecting block 41, thereby improving the stability of the connection between the straightening block 3 and the fixed block 2. When the straightening block 3 needs to be separated from the fixed block 2, the connecting plate 42 is moved in the direction of the connecting spring 43, the connecting spring 43 is compressed, and the connecting block 41 is disengaged from the connecting groove, thereby taking the straightening block 3 out of the accommodating groove 22 on the fixed block 2, and replacing the straightening block 3.

[0037] Reference Figure 2 and Figure 3A first connecting tooth 421 is installed on the side of the connecting plate 42 close to the stabilizer body 1, and a first gear 7 is rotatably connected in the fixed block 2. The first gear 7 is meshed with the first connecting tooth 421 on the connecting plate 42. The first gear 7 rotates to adjust the position of the connecting plate 42. An intermediate plate 5 is movably installed in the fixed block 2. The intermediate plate 5 is located on the side of the first gear 7 away from the connecting plate 42. A second connecting tooth 51 is installed on the side wall of the intermediate plate 5. The first gear 7 is meshed with the second connecting tooth 51 on the intermediate plate 5 to move the intermediate plate 5, thereby driving the first gear 7 to rotate, which is convenient for moving the connecting plate 42. A driving groove is opened on the side wall of the fixed block 2, and a driving plate 6 movably connected in the fixed block 2 is provided. The driving plate 6 extends from the driving groove into the fixed block 2, and third connecting teeth 61 are installed on both sides of the driving plate 6. Two second gears 8 located on both sides of the driving plate 6 are rotatably connected in the fixed block 2. The two second gears 8 are meshed with the third connecting teeth 61 on both sides of the driving plate 6, so that the driving plate 6 is moved away from the driving groove, and the second gear 8 is driven to rotate by the third connecting teeth 61 on both sides of the driving plate 6. A fourth connecting tooth 52 is installed on the side of the middle plate 5 close to the second gear 8. The second gear 8 is meshed with the fourth connecting tooth 52 on the middle plate 5. The second gear 8 rotates and drives the middle plate 5 to move through the third connecting tooth 61, thereby driving the first gear 7 to rotate, so that the connecting plate 42 moves in the direction of the connecting spring 43, so as to facilitate the connection block 41 to be disengaged from the connecting groove. After the driving plate 6 is released, the compressed connecting spring 43 applies a force to the connecting plate 42 in the direction away from the connecting spring 43, so that the connecting block 41 is reset.

[0038] Reference Figure 1 and Figure 4 A protective plate 9 for covering the driving slot is installed on the fixed block 2. One side of the protective plate 9 is hinged to the fixed block 2, and an insert 91 is installed on the other side. The fixed block 2 is provided with an embedding groove 23 that matches the insert 91. The insert 91 is located in the embedding groove 23 and has an interference fit with the fixed block 2. When the stabilizer is in working state, the driving plate 6 is located in the driving slot, and the insert 91 is located in the embedding groove 23 and has an interference fit with the fixed block 2. The protective plate 9 protects the driving plate 6 in the driving slot. When the driving plate 6 needs to be moved, the insert 91 is taken out of the embedding groove 23, and the protective plate 9 is opened, so that the driving plate 6 is moved.

[0039] Reference Figure 1 The connecting block 41 is provided with an inclined surface along the side close to the accommodating groove 22 and away from the accommodating groove 22 on the side away from the accommodating groove 22. When the straightening block 3 enters the fixing groove 21, the inclined surface is affected by the lower end surface of the straightening block 3 and moves toward the accommodating groove 22. The connecting spring 43 is compressed. When the connecting groove moves to the position of the accommodating groove 22, the connecting spring 43 applies a force to the connecting plate 42 in the direction away from the connecting spring 43, so that the connecting block 41 is inserted into the connecting groove through the connecting plate 42.

[0040] Reference Figure 1 A plurality of wear-resistant strips 31 are obliquely installed on the side of the straightening block 3 away from the stabilizer body 1. The plurality of wear-resistant strips 31 are equidistantly arranged along the length direction of the straightening block 3 to facilitate uniform stress dispersion and convenient use. The wear-resistant strips 31 improve the wear resistance of the stabilizer body 1. A plurality of wear-resistant protrusions 311 are arranged on the side of the wear-resistant strip 31 away from the stabilizer body 1 to improve the wear resistance of the wear-resistant strip 31.

[0041] The implementation principle of a stabilizer for geological drilling in the embodiment of the present application is as follows: when the straightening block 3 extends into the accommodating groove 22, the connecting block 41 extends into the connecting groove on the straightening block 3, and the connecting spring 43 limits the position of the connecting plate 42 and the connecting block 41, thereby improving the stability of the connection between the straightening block 3 and the fixed block 2. When the straightening block 3 needs to be separated from the fixed block 2, the driving plate 6 is moved away from the driving groove, and the second gear 8 is driven to rotate by the third connecting teeth 61 on both sides of the driving plate 6. The middle plate 5 is provided with a fourth connecting tooth 52 on the side close to the second gear 8. The gear 8 is meshed with the fourth connecting tooth 52 on the middle plate 5, and the second gear 8 rotates to drive the middle plate 5 to move through the third connecting tooth 61, thereby driving the first gear 7 to rotate, so that the connecting plate 42 moves in the direction of the connecting spring 43, so that the connecting block 41 is disengaged from the connecting groove, and the straightening block 3 is separated from the fixed block 2, so that the worn straightening block 3 can be replaced and maintained conveniently. The straightening block 3 is installed on the fixed block 2, and the straightening block 3 is used to ensure the straightness of the drill hole, avoid direct friction contact between the stabilizer body 1 and the well wall, reduce the side wall wear of the stabilizer body 1, and protect the stabilizer.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stabilizer for geological drilling, comprising a stabilizer body (1), wherein both ends of the stabilizer body (1) are provided with a stabilizer sleeve (11), characterized in that: A plurality of fixed blocks (2) are arranged at equal intervals on the side wall of the stabilizer body (1); a tilting block (12) is arranged on the side of the fixed block (2) close to the stabilizing sleeve (11); the tilting block (12) is fixedly connected to the side wall of the stabilizer body (1); a fixing groove (21) is provided on the fixed block (2); a straightening block (3) is arranged on the fixed block (2); the straightening block (3) is located in the fixing groove (21); and a connecting component (4) for connecting the straightening block (3) with the fixed block (2) is arranged in the fixed block (2).

2. A stabilizer for geological drilling according to claim 1, characterized in that: The fixing block (2) is provided with two receiving grooves (22) in communication with the fixing groove (21), the two receiving grooves (22) being close to different stabilizing sleeves (11), the connecting assembly (4) comprising a connecting plate (42) and a connecting spring (43) located in the receiving groove (22), the connecting plate (42) being movably connected to the fixing block (2), the connecting spring (43) being located on a side of the connecting plate (42) close to the receiving groove (22), the two ends of the connecting spring (43) being fixedly connected to the connecting plate (42) and the fixing block (2), the connecting plate (42) being provided with a connecting block (41) on a side away from the connecting spring (43), when the connecting spring (43) is in a natural state, the connecting block (41) is located in the fixing groove (21), and connecting grooves matching with the connecting block (41) are provided on both sides of the straightening block (3).

3. A geological drilling stabilizer according to claim 2, characterized in that: The connecting block (41) is provided with an inclined surface on the side away from the stabilizer body (1) along the side close to the accommodating groove (22) and in a direction away from the accommodating groove (22).

4. A geological drilling stabilizer according to claim 2, characterized in that: A first connecting tooth (421) is provided on one side of the connecting plate (42) close to the stabilizer body (1), and a first gear (7) is rotatably connected inside the fixing block (2), and the first gear (7) is meshed with the first connecting tooth (421) on the connecting plate (42).

5. A stabilizer for geological drilling according to claim 4, characterized in that: An intermediate plate (5) is arranged inside the fixed block (2), and the intermediate plate (5) is located on a side of the first gear (7) away from the connecting plate (42). A second connecting tooth (51) is arranged on a side wall of the intermediate plate (5), and the first gear (7) meshes with the second connecting tooth (51) on the intermediate plate (5).

6. A geological drilling stabilizer according to claim 5, characterized in that: A driving groove is provided on the side wall of the fixed block (2), a driving plate (6) movably connected to the fixed block (2) is arranged in the driving groove, the driving plate (6) extends into the fixed block (2), third connecting teeth (61) are arranged on both sides of the driving plate (6), two second gears (8) are arranged in the fixed block (2) and are located on both sides of the driving plate (6), the two second gears (8) are meshed with the third connecting teeth (61) on both sides of the driving plate (6), and the middle plate (5) is provided with a fourth connecting tooth (52) on the side close to the second gear (8), and the second gear (8) is meshed with the fourth connecting tooth (52) on the middle plate (5).

7. A stabilizer for geological drilling according to claim 6, characterized in that: The fixing block (2) is provided with a protective plate (9) for covering the driving notch. One side of the protective plate (9) is hinged to the fixing block (2), and the other side is provided with an insert (91). The fixing block (2) is provided with an insert groove (23) matching with the insert groove (91). The insert groove (91) is located in the insert groove (23) and is interference-fitted with the fixing block (2).

8. A geological drilling stabilizer according to claim 1, characterized in that: A plurality of wear-resistant strips (31) are obliquely arranged on one side of the straightening block (3) away from the stabilizer body (1), and the plurality of wear-resistant strips (31) are arranged at equal intervals along the length direction of the straightening block (3).

9. A geological drilling stabilizer according to claim 8, characterized in that: A plurality of wear-resistant protrusions (311) are arranged on the side of the wear-resistant strip (31) away from the stabilizer body (1).

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