Self-adaptive drill rod stabilizer for oil exploitation

Abstract

The invention relates to a self-adaptive drill rod stabilizer for oil exploitation, which is applied to the field of well drilling, and is characterized in that a rotatable variable-diameter arc-shaped fin is arranged at the outer end of an outer pipe, and a guide moving sheet for limiting the rotating angle of the arc-shaped fin is arranged on the inner side of the outer pipe; according to the drilling guide device, control over the rotation amplitude of the arc-shaped fins is achieved, then large-amplitude reducing adjustment of the drilling guide device is achieved according to the drilling requirement, and in the drilling process, the rotation amplitude of the arc-shaped fins can be automatically adjusted according to tiny changes of the well diameter through arrangement of the elastic structures of the guide moving pieces; in this way, the self-adaptive small-amplitude reducing adjusting process is achieved, the self-adaptive small-amplitude reducing adjusting device is still in a continuous contact state with the well wall when the well diameter is increased, the well wall is effectively trimmed, and when the well diameter is reduced, the self-adaptive small-amplitude reducing adjusting device and the well wall are not prone to hard extrusion to affect the self-structure and the drilling process.

Description

Technical Field

[0001] The present invention relates to a drill pipe stabilizer, and particularly to an adaptive drill pipe stabilizer for oil extraction applied in the drilling field. Background Art

[0002] A stabilizer, also known as a centralizer, is a tool for stabilizing downhole drill tools and preventing deviation. It is connected to a section of drill pipe string near the large-diameter drill tool and is used to stabilize the drilling direction. During the process of the stabilizer coming into frictional contact with the wellbore wall, it has a varying degree of trimming effect on the wellbore wall, making the wellbore wall smoother and flatter, improving the wellbore quality. The outer diameter of the stabilizer generally needs to match the outer diameter of the drill tool to facilitate the movement of the drill tool.

[0003] For example, the specification of Chinese Patent CN115506727B discloses a variable-diameter drill tool stabilizer, which realizes the balance of the upper and lower pistons and prevents them from moving. Since the inclination angle between the cone and the centralizing block is less than the friction angle, the centralizing strip is self-locked. When the lower piston and the upper piston do not move, the centralizing strip will not move inwards or outwards, and the drill tool has good stabilizing effect. By inserting large and small diameter soluble balls, the position of the centralizing strip can be changed, and the centralizing strip can extend or retract, facilitating reaming construction without the need to install special reaming tools for reaming. Another example is the specification of Chinese Patent CN109577876B, which discloses a replaceable inclined wing stabilizer, effectively solving the problem of not only being able to function as a stabilizer but also being convenient for on-site replacement, shortening the drilling cycle, and improving work efficiency.

[0004] Most of the existing variable-diameter drill pipe stabilizers adopt the method of replacing wing pieces or slightly changing the diameter. Although the variable-diameter effect is achieved, in the actual drilling process, due to various accidental factors such as geological conditions, bit wear, and drilling techniques, the actual wellbore diameter is prone to minor changes. However, since the outer diameter of the variable-diameter stabilizer is fixed after adjustment, it is difficult to adapt to the minor changes in the wellbore diameter during drilling, which has a certain impact on the correction of the wellbore wall or the drilling process. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing variable-diameter drill pipe stabilizer has a fixed outer diameter after adjustment and is difficult to adapt to the minor changes in the wellbore diameter caused by various accidental factors such as geological conditions, bit wear, and drilling techniques during drilling.

[0006] To solve the above problems, the present invention provides an adaptive drill pipe stabilizer for oil extraction, which includes a central pipe and an outer pipe fixedly connected to the outer end of the central pipe. A plurality of evenly distributed arc-shaped fins are rotatably connected to the outer end of the outer pipe. An inner groove is provided at the upper end of the outer pipe, and a plurality of guiding channels communicating with the outside are provided on the inner wall of the inner groove. When the arc-shaped fins are attached to the outer wall of the outer pipe, a plurality of arc-shaped fins respectively cover the outside of a plurality of guiding channels. A plurality of guiding plates are provided inside the inner groove, and the plurality of guiding plates correspond to the plurality of guiding channels one by one and are slidably connected inside them. A pressure pipe is slidably sleeved on the outer end of the central pipe, the lower end of the pressure pipe is movably inserted between the inner groove and the central pipe, and the pressure pipe is located above the guiding plate. A plurality of evenly distributed screw grooves are provided at the outer end of the pressure pipe, and a plurality of evenly distributed screw holes are provided on the inner wall of the inner groove. The outer pipe and the pressure pipe are threadedly connected by a plurality of bolts I.

[0007] As a further supplement to the present application, the lower end of the pressure pipe has a conical structure with a gradually decreasing outer diameter, and an inclined surface is provided at the upper position of the inner end of the guiding plate.

[0008] As a further supplement to the present application, the thickness of the guiding plate is the same as the notch width of the guiding channel. A pair of limiting strips are fixedly connected to both side ends of the guiding plate, and the difference between the inner diameter of the inner groove and the outer diameter of the central pipe is less than the horizontal width of the guiding plate.

[0009] As a further supplement to the present application, magnetic coatings are applied to both the inner arc surface of the arc-shaped fin and the outer wall of the outer pipe, and the outer diameter of the outer pipe is the same as the inner diameter of the arc-shaped fin.

[0010] As another improvement to the present application, the guiding plate includes an inner plate and an outer plate. A groove is provided at the end of the outer plate close to the inner plate, and a plurality of evenly distributed compression springs are fixedly connected between the inner plate and the inner wall of the groove. The inner plate is located between the central pipe and the outer plate, and the inclined surface is provided at the upper position of the inner end of the inner plate. The limiting strip is provided at the side end of the inner plate close to the central pipe.

[0011] As a supplementary improvement to the present application, a pair of limiting blocks are fixedly connected to the end of the inner plate close to the outer plate. The limiting blocks are slidably connected inside the groove. A slider is fixedly connected to each end of the pair of limiting blocks away from each other. Slide grooves are provided on the upper and lower inner walls of the groove, and a pair of sliders are respectively slidably connected inside a pair of slide grooves.

[0012] As a supplementary improvement to the present application, when the inner end of the inner plate abuts against the central pipe and the compression spring is in its original length, the outer end of the outer plate is located inside the guiding channel.

[0013] As a supplementary improvement to the present application, when the inner plate and the outer plate are in contact with each other, the sum of their horizontal widths is less than the difference between the inner diameter of the inner groove and the outer diameter of the central pipe.

[0014] As a supplement to another improvement of the present application, an installation hole is provided at the side end of the limit block, a round hole communicating with the outside is provided on the inner wall of the groove, and a second bolt is connected between the outer plate and the limit block. The second bolt passes through the round hole and is threadedly connected to the inside of the installation hole.

[0015] In summary, in the present application, a rotatable variable-diameter arc-shaped fin is provided at the outer end of the outer pipe, and a guiding piece for restricting the rotation angle of the arc-shaped fin is provided inside the outer pipe. During actual use, the distance that the guiding piece moves outward is adjusted by pressing the pipe to control the rotation amplitude of the arc-shaped fin, thereby realizing a large-scale variable-diameter adjustment of the present application according to the drilling requirements. Moreover, through the setting of the elastic structure of the guiding piece itself, during the drilling process, the rotation amplitude of the arc-shaped fin can be automatically adjusted according to the slight change of the well diameter, so as to realize the self-adaptive small-scale variable-diameter adjustment process, and still maintain a continuous contact state with the well wall when the well diameter increases, achieving effective trimming of the well wall, and not easily causing hard extrusion with the well wall when the well diameter decreases, thus not affecting its own structure and the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present application without variable diameter in the first embodiment; Figure 2 is a perspective view of the present application with variable diameter in the first embodiment; Figure 3 is a perspective view of the outer pipe and the arc-shaped fin of the present application in the first embodiment; Figure 4 is a perspective view of the pressing pipe and the guiding piece of the present application in the first embodiment; Figure 5 is a front structural schematic diagram of the present application without variable diameter in the first embodiment; Figure 6 is a front structural schematic diagram of the present application with variable diameter in the first embodiment; Figure 7 is a top structural schematic diagram of the present application without variable diameter in the first embodiment; Figure 8 is a top structural schematic diagram of the present application with variable diameter in the first embodiment; Figure 9 is a perspective view of the guiding piece in the second embodiment of the present application Figure 1 ; Figure 10 is a perspective view of the guiding piece in the second embodiment of the present application Figure 2 ; Figure 11 is a front structural schematic diagram of the present application without variable diameter in the second embodiment; Figure 12 is a front structural schematic diagram of the present application with variable diameter in the second embodiment; Figure 13 Isometric view during diameter variation in the second embodiment of the present application; Figure 14 Front structural schematic diagram when removing the pressure pipe in the second embodiment of the present application; Figure 15 Front structural schematic diagram when removing the guiding and moving sheet in the second embodiment of the present application; Figure 16 Isometric view of the guiding and moving sheet in the second embodiment of the present application Figure 3 .

[0017] Description of reference numerals in the figure: 1 Central pipe, 2 Outer pipe, 201 Built-in groove, 202 Guiding and moving channel, 3 Arc-shaped fin, 4 Pressure pipe, 401 Threaded groove, 5 Guiding and moving sheet, 501 Inclined surface, 502 Limiting strip, 51 Inner plate, 52 Outer plate, 5201 Groove, 5202 Slide groove, 5203 Round hole, 53 Compression spring, 54 Limiting block, 5401 Mounting hole, 55 Slide block, 6 Bolt 1, 7 Bolt 2. Specific embodiments

[0018] The following will describe in detail two embodiments of the present application with reference to the accompanying drawings.

[0019] The first embodiment: The present invention provides an adaptive drill pipe stabilizer for oil extraction. Please refer to Figure 1 and Figure 2 , which includes a central pipe 1 and an outer pipe 2 fixedly connected to the outer end of the central pipe 1. A plurality of evenly distributed arc-shaped fins 3 are rotatably connected to the outer end of the outer pipe 2. Magnetic coatings are provided on the inner arc surface of the arc-shaped fin 3 and the outer wall of the outer pipe 2, and the outer diameter of the outer pipe 2 is the same as the inner diameter of the arc-shaped fin 3. An internal groove 201 is opened at the upper end of the outer pipe 2. Referring to Figure 4 as shown, the inner wall of the lower end of the outer pipe 2 is fixedly connected to the outer end of the central pipe 1, thereby realizing the fixed connection between the central pipe 1 and the outer pipe 2. Please refer to Figure 3 , a plurality of guiding and moving channels 202 communicating with the outside are opened on the inner wall of the internal groove 201. When not affected by other external forces, under the magnetic attraction of the magnetic coating, the arc-shaped fin 3 can be stably attached to the outer wall of the outer pipe 2, and at this time, a plurality of arc-shaped fins 3 respectively cover the outside of a plurality of guiding and moving channels 202. The overall outer diameter of this stabilizer is in the smallest state. A plurality of guiding and moving sheets 5 are provided inside the internal groove 201. The plurality of guiding and moving sheets 5 correspond to the plurality of guiding and moving channels 202 one by one and are slidably connected inside them. When the guiding and moving sheet 5 moves outward along the guiding and moving channel 202, the guiding and moving sheet 5 applies an outward thrust to the arc-shaped fin 3, causing the arc-shaped fin 3 to rotate at the outer end of the outer pipe 2, and the distance between its end and the outer pipe 2 increases, realizing overall diameter expansion, so that the outer pipe 2 contacts and trims the wellbore with a larger inner diameter.

[0020] Combined with Figure 2 、 Figure 4 and Figure 5 , a pressure tube 4 is slidably sleeved on the outer end of the central tube 1. The lower end of the pressure tube 4 is movably inserted between the built-in groove 201 and the central tube 1, and the pressure tube 4 is located above the guide sheet 5. A plurality of uniformly distributed screw grooves 401 are formed in the outer end of the pressure tube 4, and a plurality of uniformly distributed screw holes are formed in the inner wall of the built-in groove 201. The screw holes are located above the arc-shaped wing 3. The outer tube 2 and the pressure tube 4 are threadedly connected by a plurality of first bolts 6. The first bolts 6 pass through the screw holes and are threadedly connected to the inside of the screw grooves 401. The lower end of the pressure tube 4 has a tapered structure with a gradually decreasing outer diameter, and an inclined surface 501 is formed at the upper position of the inner end of the guide sheet 5; Combined with Figure 5 and Figure 6 shown, the following diameter expansion operation is performed on the stabilizer according to the drilling requirements: Remove the first bolt 6, and then manually move the pressure tube 4 downward. Through the cooperation between the tapered structure at the lower end of the pressure tube 4 and the inclined surface 501, the downward movement of the pressure tube 4 can simultaneously extrude a plurality of guide sheets 5 outward, stably move outward along the guide channel 202, and then push the arc-shaped wing 3 to rotate outward to achieve the diameter expansion operation (the maximum distance from the center of the central tube 1 to the outer arc surface of the outer tube 2 is the maximum outer diameter of the diameter change of the stabilizer, and this outer diameter size matches the drilling diameter and meets the drilling requirements). After confirming the moving position of the guide sheet 5, insert the first bolt 6 into the corresponding screw groove 401 through the screw hole on the outer tube 2 to fix the pressure tube 4; Combined with Figure 8 shown, after connecting the stabilizer to the drill pipe string, the direction of rotation of the arc-shaped wing 3 outward is opposite to the drilling direction. In this way, during the drilling process, not only through the limiting effect of the guide sheet 5, the outer arc surface of the arc-shaped wing 3 is kept in contact with the well wall for friction to trim the well wall, but also it is not easy to cause the arc-shaped wing 3 to continue to rotate outward or even be damaged due to the well wall friction.

[0021] Please refer to Figure 7 , the thickness of the guide sheet 5 is the same as the notch width of the guide channel 202. A limiting strip 502 is fixedly connected to a pair of side ends of the guide sheet 5. The setting of the limiting strip 502 can prevent the guide sheet 5 from moving outward excessively and prevent the guide sheet 5 from disengaging from the guide channel 202. The difference between the inner diameter of the built-in groove 201 and the outer diameter of the central tube 1 is less than the horizontal width of the guide sheet 5, and the difference between the outer diameter of the central tube 1 and the outer diameter of the outer tube 2 is greater than the horizontal width of the guide sheet 5. In this way, when the stabilizer is not in use, the outer edge of the guide sheet 5 will be inside the guide channel 202, that is, it is not easy to hinder the fitting placement of the arc-shaped wing 3 and the outer tube 2, nor is it easy to move inward and completely disengage from the guide channel 202, and it is not easy to affect the subsequent use.

[0022] The second implementation method: In the first embodiment, although the outward rotation angle of the arc-shaped fin 3 is controlled according to the drilling hole diameter, that is, the diameter change amplitude is controlled. However, during the actual drilling process, due to various accidental factors such as geological conditions, bit wear, and drilling technology, the hole diameter may change slightly. The guide fin 5 and the arc-shaped fin 3 in the first embodiment are difficult to adapt to this hole diameter change. If the hole diameter increases, there will be a gap between the arc-shaped fin 3 and the wellbore, making it difficult to effectively correct the wellbore. If the hole diameter decreases, due to the limiting block of the guide fin 5, the arc-shaped fin 3 is difficult to adapt to the hole diameter change, which is likely to damage this stabilizer. Therefore, in order to further adapt to the slight hole diameter change caused by other factors, the following further settings are made for the guide fin 5 in this embodiment, and the rest of the structure is the same as that in the first embodiment: Please refer to Figure 9 and Figure 10 , the guide fin 5 includes an inner plate 51 and an outer plate 52. A groove 5201 is formed at one end of the outer plate 52 close to the inner plate 51. A plurality of uniformly distributed compression springs 53 are fixedly connected between the inner plate 51 and the inner wall of the groove 5201. The inner plate 51 is located between the central pipe 1 and the outer plate 52. The inclined surface 501 is arranged at the upper position of the inner end of the inner plate 51, and the limiting strip 502 is arranged at the side end of the inner plate 51 close to the central pipe 1. Combining Figure 10 and Figure 11 , a pair of limiting blocks 54 are fixedly connected to one end of the inner plate 51 close to the outer plate 52. The limiting blocks 54 are slidably connected to the inside of the groove 5201. The outer plate 52 can move along the limiting blocks 54, squeezing or releasing the compression springs 53 to adjust the distance between it and the inner plate 51. A slider 55 is fixedly connected to one end of each pair of limiting blocks 54 away from each other. Slide grooves 5202 are formed on the upper and lower inner walls of the groove 5201. A pair of sliders 55 are respectively slidably connected to the inside of a pair of slide grooves 5202, which play a role in limiting the sliding of the outer plate 52, so that it is not easy for the outer plate 52 and the inner plate 51 to separate from each other.

[0023] In this embodiment, as Figure 12 and Figure 13As shown, the variable diameter operation of the first embodiment is still adopted to adjust the movement of the guide piece 5 and the rotation of the arc-shaped wing piece 3 to meet the requirements of the drilling hole diameter. However, it should be noted that: in this embodiment, the maximum outer diameter after adjustment should be slightly larger than the drilling hole diameter (such as exceeding the drilling hole diameter by 1%-5%), which is the best adjustment state. In actual operation, if the well diameter is normal, in order to adapt to the well diameter, the arc-shaped wing piece 3 will slightly squeeze the outer plate 52, and the compression spring 53 will contract. The guide piece 5 will generate an outward reaction force on the arc-shaped wing piece 3. Through this reaction force, the arc-shaped wing piece 3 can be kept in close contact with the well wall to normally trim the well wall. If the well diameter increases slightly due to accidental factors, the compression spring 53 will be released to a certain extent, causing the arc-shaped wing piece 3 to rotate further outwards to automatically adapt to the increased well diameter and maintain the trimming effect on the well wall. If the well diameter decreases slightly due to accidental factors, in order to adapt to the reduced well diameter, the arc-shaped wing piece 3 will further squeeze the outer plate 52, and the rotation angle of the arc-shaped wing piece 3 will decrease, and the outer diameter of this stabilizer will decrease, so as to automatically adapt to the reduced well diameter.

[0024] In this application, for the convenience of schematically showing the structure, each structure is not drawn completely according to the actual proportion. In the specific implementation process, those skilled in the art can make the best settings for the dimensions of each structure according to the existing technology and actual needs. For example: the distance between adjacent spiral grooves 401 can be minimized, so that the downward movement distance of the pressure pipe 4 can be more finely controlled, the movement distance of the guide piece 5 can be more subtly controlled, and thus the variable diameter amplitude can be conveniently controlled.

[0025] As Figure 11 shown, when the inner end of the inner plate 51 abuts against the central pipe 1 and the compression spring 53 is in its original length, the outer end of the outer plate 52 is located inside the guide channel 202. Just like the first embodiment, when not in use, it is not easy to hinder the fitting of the arc-shaped wing piece 3 and the outer pipe 2, nor is it easy to make the guide piece 5 completely disengage from the guide channel 202 inward.

[0026] As Figure 15 shown, when the inner plate 51 and the outer plate 52 are in contact, at this time the compression spring 53 is in a compressed state, and the sum of their horizontal widths is less than the difference between the inner diameter of the built-in groove 201 and the outer diameter of the central pipe 1. In this way, the compressed guide piece 5 can be taken out from the gap between the built-in groove 201 and the central pipe 1, which is convenient for replacing the guide piece 5 with insufficient elasticity. However, before taking out the guide piece 5, the pressure pipe 4 needs to be taken out from the central pipe 1. As Figure 14 shown, first unscrew the bolt 6 from the outer pipe 2 and the pressure pipe 4, and then the pressure pipe 4 can be taken out from the upper end of the central pipe 1.

[0027] Please refer to Figure 16, in order to further facilitate the removal of the guiding sheet 5, an installation hole 5401 is provided at the side end of the limiting block 54. A round hole 5203 communicating with the outside is provided on the inner wall of the groove 5201. A second bolt 7 is connected between the outer plate 52 and the limiting block 54. The second bolt 7 passes through the round hole 5203 and is threadedly connected to the inside of the installation hole 5401. At this time, the inner plate 51 and the outer plate 52 are in contact with each other. Since the compression spring 53 is in a compressed state and there is an outward elastic force acting on the outer plate 52, before removing the guiding sheet 5, by moving the pressing tube 4 downward, the guiding sheet 5 is pushed outward to the maximum extent, exposing the limiting block 54 and the outer plate 52 to the outside. Then, move the outer plate 52 towards the inner plate 51, and screw the second bolt 7 through the round hole 5203 into the installation hole 5401 to fix the outer plate 52 on the limiting block 54, realizing the fixation of the inner plate 51 and the outer plate 52. Then remove the pressing tube 4, and subsequently, the compressed guiding sheet 5 can be taken out from the built-in groove 201 for replacement. Note: The depth of the round hole 5203 is greater than the head thickness of the second bolt 7, so that the head of the second bolt 7 installed extends beyond the side end plane of the outer plate 52 and is not likely to obstruct the entry and exit of the guiding sheet 5 from the guiding channel 202.

[0028] Combined with the current actual requirements, the above-described implementation manner adopted in this application does not limit the protection scope thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An adaptive drill pipe stabilizer for oil production, comprising a central tube (1) and an outer tube (2) fixedly connected to the outer end of the central tube (1), characterized in that: The outer end of the outer tube (2) is rotatably connected to a plurality of evenly distributed arc-shaped fins (3); the upper end of the outer tube (2) is provided with an internal groove (201); the inner wall of the internal groove (201) is provided with a plurality of guide channels (202) communicating with the outside; when the arc-shaped fins (3) are in contact with the outer wall of the outer tube (2), the plurality of arc-shaped fins (3) respectively cover the outer sides of the plurality of guide channels (202); the interior of the internal groove (201) is provided with a plurality of guide plates (5); the plurality of guide plates (5) and the plurality of guide channels (202) are connected to each other. The transfer channels (202) correspond to each other one by one and are slidably connected inside thereof; the outer end of the central tube (1) is slidably sleeved with a pressing tube (4); the lower end of the pressing tube (4) is movably inserted between the built-in groove (201) and the central tube (1), and the pressing tube (4) is located on the upper side of the guide plate (5); the outer end of the pressing tube (4) is provided with a plurality of evenly distributed screw grooves (401); the inner wall of the built-in groove (201) is provided with a plurality of evenly distributed screw holes; the outer tube (2) and the pressing tube (4) are threadedly connected via a plurality of bolts (6).

2. The adaptive drill pipe stabilizer for oil production according to claim 1, characterized in that: The lower end of the pressing tube (4) is in a conical structure with a gradually decreasing outer diameter, and an inclined surface (501) is provided at the upper portion of the inner end of the guide plate (5).

3. The adaptive drill pipe stabilizer for oil production according to claim 2, characterized in that: The thickness of the guide plate (5) is the same as the slot width of the guide channel (202); a pair of side ends of the guide plate (5) are fixedly connected to the limit strip (502); and the difference between the inner diameter of the built-in groove (201) and the outer diameter of the central tube (1) is smaller than the horizontal width of the guide plate (5).

4. The adaptive drill pipe stabilizer for oil production according to claim 1, characterized in that: The inner end arc surface of the arc-shaped wing (3) and the outer wall of the outer tube (2) are both coated with a magnetic coating, and the outer diameter of the outer tube (2) is the same as the inner diameter of the arc-shaped wing (3).

5. The adaptive drill pipe stabilizer for oil production according to claim 3, characterized in that: The guide plate (5) comprises an inner plate (51) and an outer plate (52); a groove (5201) is provided at one end of the outer plate (52) close to the inner plate (51); a plurality of uniformly distributed compression springs (53) are fixedly connected between the inner plate (51) and the inner wall of the groove (5201); the inner plate (51) is located between the central tube (1) and the outer plate (52); the inclined surface (501) is arranged at the upper inner end of the inner plate (51); and the limiting strip (502) is arranged at the side end of the inner plate (51) close to the central tube (1).

6. The adaptive drill pipe stabilizer for oil production according to claim 5, characterized in that: A pair of limit blocks (54) are fixedly connected to one end of the inner plate (51) close to the outer plate (52); the limit blocks (54) are slidably connected to the inside of the groove (5201); a pair of sliders (55) are fixedly connected to one end of the pair of limit blocks (54) away from each other; a slide groove (5202) is provided on the upper and lower inner walls of the groove (5201); and the pair of sliders (55) are slidably connected to the inside of the pair of slide grooves (5202), respectively.

7. The adaptive drill pipe stabilizer for oil production according to claim 5, characterized in that: When the inner end of the inner plate (51) abuts against the central tube (1) and the compression spring (53) is at its original length, the outer end of the outer plate (52) is located inside the guide channel (202).

8. The adaptive drill pipe stabilizer for oil production according to claim 5, characterized in that: When the inner plate (51) and the outer plate (52) are in contact, the sum of their horizontal widths is smaller than the difference between the inner diameter of the built-in groove (201) and the outer diameter of the central tube (1).

9. The adaptive drill pipe stabilizer for oil production according to claim 6, characterized in that: A mounting hole (5401) is provided at the side end of the limit block (54), a circular hole (5203) communicating with the outside is provided on the inner wall of the groove (5201), and a second bolt (7) is connected between the outer plate (52) and the limit block (54), and the second bolt (7) passes through the circular hole (5203) and is threadedly connected to the inside of the mounting hole (5401).

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