A super-large diameter well push-in device

Abstract

This utility model provides an ultra-large wellbore pushing device, relating to the field of petroleum exploration technology. It includes: a main body; an inner spring box disposed at one end of the upper housing near the middle housing; four piston rods symmetrically arranged centrally within the spring box, one end of each piston rod extending into the upper housing and the other end extending towards the middle housing; four measuring rods movably disposed outside the middle housing, one end of each measuring rod rotatably disposed at the end of the middle housing near the upper housing; and an adjustment mechanism disposed within the middle housing for adjusting the angle of the measuring rods relative to the middle housing. According to this utility model, one end of a support rod is rotatably connected to the inner side of each measuring rod, and the other end of each support rod extends into a through groove and is rotatably connected to a rotating part. The support rod, measuring rod, and middle housing form a triangular linkage, which, through the sliding of the outer spring box, allows for adjustment of the measuring range of the measuring rods, enabling adaptive adjustment according to the actual wellhead size.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration technology, specifically to an ultra-large diameter well push-in device. Background Technology

[0002] The borehole space formed during drilling is irregular, and the radius of the well often varies within the same horizontal plane, meaning the horizontal cross-section is an irregular polygon. Knowing the size and variation of the well diameter is necessary when calculating the amount of cement required for cementing and interpreting well logs. Currently, in the domestic well logging industry, instruments for measuring well diameter are conventional four-arm logging instruments with limited maximum measurement range. When dealing with complex geological conditions and ultra-large well diameters exceeding the measurement range of conventional robotic arms (e.g., in areas with rock creep, severe collapse, or intentionally drilled large wellbore sections), their measurement range is limited and cannot be adjusted according to the application scenario. Therefore, this invention proposes an ultra-large well diameter pushing device to improve the above-mentioned problems. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect that the measurement range of the ultra-large well diameter pushing device in the prior art cannot be adjusted according to the usage scenario, thereby providing an ultra-large well diameter pushing device.

[0004] To address the aforementioned problems, this utility model provides an ultra-large diameter wellbore pushing device, comprising: The main body is designed in a segmented manner, consisting of an upper shell, a middle shell, and a lower shell that can be detachably connected in sequence. An inner spring box is located at one end of the upper housing near the middle housing. Four piston rods are symmetrically arranged in the center of the spring box. One end of each piston rod extends into the upper housing, and the other end extends into the middle housing. A middle housing, on which four measuring rods are movably disposed, one end of each measuring rod being rotatably disposed at the end of the middle housing near the upper housing; An adjustment mechanism, located inside the middle housing, is used to adjust the angle of the measuring rod relative to the middle housing.

[0005] Preferably, a through groove is provided on the outer side of the middle housing for each of the measuring rods, and an abutment portion is provided on the end of the measuring rod near the upper housing to abut against the piston rod that extends into it.

[0006] Preferably, the adjustment mechanism includes: an outer spring box, which is slidably disposed within the middle housing; a rotating part is disposed near each of the through slots; a support rod is disposed between the measuring rod and the outer spring box; one end of the support rod is rotatably connected to the inner side of the measuring rod; and the other end of the support rod extends into the through slot and is rotatably connected to the rotating part.

[0007] Preferably, a driving component is provided at one end of the outer spring box near the lower housing to move the outer spring box toward both ends of the middle housing.

[0008] Preferably, a fixing frame is provided inside the upper housing near the inner spring box, and a terminal block is provided at one end of the fixing frame away from the inner spring box. A pull rod potentiometer is provided on the outer side of the fixing frame corresponding to each piston rod. One end of the pull rod potentiometer is connected to the terminal block, and the other end of the pull rod potentiometer is provided with a contact and extends toward the piston rod.

[0009] Preferably, the measuring rod has a first connecting part at one end of its extension, and the measuring rod also has an extension rod at one end. The measuring rod and the extension rod are detachably connected through the first connecting part and the second connecting part. The end of the extension rod away from the measuring rod is provided with a wear-resistant head.

[0010] The ultra-large diameter wellbore pushing device provided by this utility model has the following beneficial effects: 1. This utility model has four measuring rods movably arranged outside the middle shell. One end of the measuring rod is rotatably set at the end of the middle shell near the upper shell. The measuring range relative to the wellhead can be adjusted by opening the measuring rod relative to the middle shell. The adjustment mechanism is set inside the middle shell and is used to adjust the angle of the measuring rod relative to the middle shell, so that it can be adjusted according to the size of the wellhead during actual use. 2. This utility model also features a support rod with one end rotatably connected to the inner side of the measuring rod, and the other end of the support rod extending into the through groove and rotating part for rotatable connection. The support rod, measuring rod, and middle housing form a triangular linkage, which, through the sliding of the outer spring box, allows for adjustment of the measuring range of the measuring rod, enabling adaptive adjustment according to the actual wellhead size. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the assembly of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the junction box structure installation of this utility model; Figure 4This is a schematic diagram of the installation of the rotating part structure of this utility model; Figure 5 This is a schematic diagram of the installation of the drive component structure of this utility model; Figure 6 This is a schematic diagram of the installation of the support rod structure of this utility model.

[0012] The reference numerals in the attached figures are as follows: 1. Upper housing; 2. Middle housing; 3. Lower housing; 4. Inner spring box; 5. Piston rod; 6. Measuring rod; 7. Through slot; 8. Outer spring box; 9. Rotating part; 10. Support rod; 11. Drive component; 12. Fixing bracket; 13. Terminal block; 14. Pull rod potentiometer; 15. Contact; 16. Extension rod; 17. Wear-resistant head. Detailed Implementation

[0013] like Figure 1-6 As shown, this utility model provides an ultra-large diameter wellbore pushing device, which includes: The main body has connection points at both ends for connecting to external devices. These connection points can be connecting rings or hanging points. The main body is segmented, consisting of a detachable upper shell 1, a middle shell 2, and a lower shell 3, allowing for easy installation and use even for longer structures. Connection methods can include threaded connections or snap-fit ​​connections, facilitating the assembly and disassembly of the entire main body. An inner spring box 4 is located at the end of the upper shell 1 near the middle shell 2. Four piston rods 5 are symmetrically arranged within the inner spring box 4, slidingly connected to it. One end of each piston rod 5 extends into the upper shell 1, and the other end extends towards the middle shell 2. The middle shell 2 has four movably mounted measuring rods 6, one end of which is rotatably positioned at the end of the middle shell 2 near the upper shell 1. The measuring range relative to the wellhead can be adjusted by opening the measuring rods relative to the middle shell 2. An adjustment mechanism, located within the middle shell 2, adjusts the angle of the measuring rods 6 relative to the middle shell 2, allowing adjustment based on the wellhead size during actual use.

[0014] like Figure 1-6 As shown, in some embodiments, a through groove 7 is provided on the outer side of the middle housing 2 corresponding to each of the measuring rods 6, so that the measuring rods 6 can pass through and be adjusted by the adjustment mechanism. The end of the measuring rod 6 near the upper housing 1 is provided with an abutment portion to abut against the piston rod 5 that extends into it. After the abutment portion of the measuring rod 6 abuts against the piston rod 5 during relative rotation of the measuring rod 6, it drives the piston rod 5 to move towards its upper housing 1 to facilitate measurement.

[0015] like Figure 1-6As shown, in some embodiments, the adjustment mechanism includes: an outer spring box 8, which is slidably disposed within the middle housing 2; a rotating part 9 is respectively disposed near each of the through slots 7; a support rod 10 is disposed between the measuring rod 6 and the outer spring box 8; one end of the support rod 10 is rotatably connected to the inner side of the measuring rod 6; and the other end of the support rod 10 extends into the through slots 7 and is rotatably connected to the rotating part 9. The support rod 10, the measuring rod 6, and the middle housing 2 form a triangular linkage, which, through the sliding of the outer spring box 8, allows for the adjustment of the measuring range of the measuring rod 6, enabling adaptive adjustment according to the actual wellhead size.

[0016] like Figure 1-6 As shown, in some embodiments, a driving component 11 is provided at one end of the outer spring box 8 near the lower housing 3 so that the outer spring box 8 moves toward both ends of the middle housing 2. The driving component 11 is commercially available and can be a motor-driven push rod or an electric cylinder, so that the outer spring box 8 is moved relative to the driving component 11, thereby changing the measuring range of its measuring rod 6.

[0017] like Figure 1-6 As shown, in some embodiments, a fixing frame 12 is provided inside the upper housing 1 near the inner spring box 4. The connection between the fixing frame 12 and the upper housing 1 can be by snap-fit ​​or bolt connection. A terminal block 13 is provided at the end of the fixing frame 12 away from the inner spring box 4. The terminal block 13 is used to fix the pull rod potentiometer 14 and to connect to the testing instrument. A pull rod potentiometer 14 is provided on the outer side of the fixing frame 12 for each piston rod 5. These are commercially available. One end of the pull rod potentiometer 14 is connected to the terminal block 13, and the other end of the pull rod potentiometer 14 is provided with a contact 15 that extends towards the piston rod 5. When the piston rod 5 moves, the pull rod potentiometer 14 changes in conjunction with the piston rod 5. The measurement principle is based on existing technology. Thus, when the instrument moves upward along the well body, the change in well diameter causes the four pull rod potentiometers 14 to change. The linear change value between the change in well diameter and the change in resistance of the pull rod potentiometer 14 is: D=K·∆R+D0 Where: K is the instrument constant (cm / Ω); ∆R is the resistance change (Ω); D is the well diameter (cm); D0 is the initial well diameter (cm); by measuring the resistance change ∆R, the change in well diameter D can be determined.

[0018] like Figure 1-6As shown, in some embodiments, a first connecting portion is provided at one end of the measuring rod 6. The measuring rod 6 is also provided with an extension rod 16, which facilitates use with a larger wellhead width. A second connecting portion is provided at one end of the extension rod 16. The measuring rod 6 and the extension rod 16 are detachably connected through the first connecting portion and the second connecting portion. This connection can be made by threaded connection, snap-fit, or bolt connection, allowing for adjustment according to the corresponding wellhead size. A wear-resistant head 17 is provided at the end of the extension rod 16 away from the measuring rod 6. This head is made of alloy, which reduces wear when the measuring rod 6 contacts the well wall, thus protecting the entire device.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A large-diameter wellbore pushing device, characterized in that, include: The main body is designed in a segmented manner, consisting of an upper shell, a middle shell, and a lower shell that can be detachably connected in sequence. An inner spring box is located at one end of the upper housing near the middle housing. Four piston rods are symmetrically arranged in the center of the spring box. One end of each piston rod extends into the upper housing, and the other end extends into the middle housing. A middle housing, on which four measuring rods are movably disposed, one end of each measuring rod being rotatably disposed at the end of the middle housing near the upper housing; An adjustment mechanism, located inside the middle housing, is used to adjust the angle of the measuring rod relative to the middle housing.

2. The ultra-large diameter wellbore pushing device according to claim 1, characterized in that: The outer side of the middle housing is provided with a through groove corresponding to each of the measuring rods, and the end of the measuring rod near the upper housing is provided with an abutment portion to abut against the piston rod that extends into it.

3. The ultra-large diameter wellbore pushing device according to claim 2, characterized in that: The adjustment mechanism includes: an outer spring box, which is slidably disposed within the middle housing; a rotating part is disposed near each of the through slots; a support rod is disposed between the measuring rod and the outer spring box; one end of the support rod is rotatably connected to the inner side of the measuring rod; and the other end of the support rod extends into the through slot and is rotatably connected to the rotating part.

4. The ultra-large diameter wellbore pushing device according to claim 3, characterized in that: A driving component is provided at one end of the outer spring box near the lower housing to move the outer spring box toward both ends of the middle housing.

5. The ultra-large diameter wellbore pushing device according to claim 1, characterized in that: A fixing frame is provided inside the upper housing near the inner spring box. A terminal block is provided at one end of the fixing frame away from the inner spring box. A pull rod potentiometer is provided on the outer side of the fixing frame corresponding to each piston rod. One end of the pull rod potentiometer is connected to the terminal block, and the other end of the pull rod potentiometer is provided with a contact and extends towards the piston rod.

6. The ultra-large diameter wellbore pushing device according to claim 2, characterized in that: The measuring rod has a first connecting part at one end of its extension. The measuring rod also has an extension rod at one end, and a second connecting part at one end of the extension rod. The measuring rod and the extension rod are detachably connected through the first connecting part and the second connecting part. The end of the extension rod away from the measuring rod is provided with a wear-resistant head.

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