A homologous sampling device

Abstract

The application discloses a same-position sampling device, which improves the technical problems of low sampling efficiency, poor sampling precision and poor operation convenience. The device comprises a base body and a rotating short section arranged at the top end of the base body, the rotating short section is used for controlling the rotation of the base body, the base body is provided with a core taking module, a liquid taking module, a driving piece, a pushing module and a hydraulic module, the liquid taking module and the pushing module are arranged at intervals of 180 degrees from the core taking module, the liquid taking module and the pushing module are located in the same vertical plane, and the core taking module and the liquid taking module are located in the same horizontal plane, so that the core taking module completes core sampling, and after the rotation of the base body is controlled by the rotating short section by 180 degrees, the liquid taking module can be aligned with the sampling hole. The application can improve the sampling efficiency, improve the sampling precision and improve the operation convenience.

Description

An isotopic sampling device Technical Field

[0001] This invention belongs to the field of well logging technology, and specifically relates to a co-sampling device. Background Technology

[0002] Currently, in order to accurately grasp various information about the formation, formation sampling and rock sampling are necessary services in the oil and gas exploration and development process. In the field of well logging, wellbore coring and formation sampling both aim to obtain actual formation data and are extremely important logging methods.

[0003] Chinese patent CN113494257A discloses an integrated core sampling section, which includes an integrally formed base, and a probe module, a core sampling module, and a hydraulic module mounted on the base; the hydraulic module, probe module, and core sampling module are arranged sequentially from top to bottom; the output end of the hydraulic module is connected to the probe module and the core sampling module respectively, and the hydraulic module is configured to provide extension and retraction power to the probe module, and to provide power for the movement, flipping, and core pushing of the core sampling module.

[0004] When the above-mentioned device performs sampling operations, the core drill bit of the core sampling module creates a hole in the well wall to obtain a sampling hole. The rock from the sampling hole then enters the sampling cylinder of the substrate, thus achieving rock sampling. Next, the substrate is controlled to move vertically, causing the probe module to align with and cover the sampling hole. The probe module is then used to extract the liquid from the sampling hole, thereby achieving well fluid sampling.

[0005] However, when performing core sampling at the same location using the aforementioned device, frequent vertical movement of the substrate must be controlled, and the probe module must be aligned with the sampling hole to achieve the desired core sampling. However, in downhole operations, it is difficult to ensure precise alignment of the probe module with the sampling hole, thus affecting sampling accuracy. Furthermore, when multiple core sampling operations are required around a section of the wellbore, each sampling operation requires controlling the vertical movement of the substrate, which is time-consuming and reduces sampling efficiency.

[0006] It is evident that the sampling devices in the relevant technologies suffer from drawbacks such as low sampling efficiency, poor sampling accuracy, and poor operational convenience. Therefore, improving sampling efficiency, sampling accuracy, and operational convenience are of great significance for achieving efficient well logging. Summary of the Invention

[0007] In order to solve all or some of the above problems, the purpose of this invention is to provide a co-sampling device that can improve sampling efficiency, sampling accuracy and operational convenience.

[0008] This invention provides an isotopic sampling device, comprising:

[0009] The substrate is arranged vertically.

[0010] A rotating sub is disposed at the top of the base body. The rotating sub is provided with a clamping module that can abut against and fix it to the well wall. A retractable cable is connected to the top of the rotating sub, and the rotating sub is used to control the rotation of the base body.

[0011] A core sampling module is installed on the substrate and is used to sample rock cores;

[0012] The fluid sampling module is movably connected to the substrate and is used to sample the well fluid;

[0013] A driving component is disposed on the base and is used to control the horizontal movement of the liquid sampling module and to press the liquid sampling module against the well wall;

[0014] A push-fit module is disposed on the base and is used to press against the well wall;

[0015] A hydraulic module is mounted on the base, and the hydraulic module can provide power to the clamping module, the core-removing module and the pushing module;

[0016] The liquid sampling module and the push-fit module are respectively set 180° apart from the core sampling module. The liquid sampling module and the push-fit module are located in the same vertical plane, and the core sampling module and the liquid sampling module are located in the same horizontal plane, so that the core sampling module can complete the core sampling. After the matrix is ​​rotated 180° by the rotating short section, the liquid sampling module can be aligned with the sampling hole.

[0017] Optionally, the driving element includes:

[0018] The first push arm is rotatably connected to the bottom end of the liquid extraction module via a first pivot, and a first support plate is provided at the end of the first push arm away from the first pivot.

[0019] The second push arm is rotatably connected to the top of the liquid extraction module via a second pivot. The end of the second push arm away from the second pivot is rotatably connected to the base via a support shaft, and a second support plate is provided at the end of the second push arm away from the second pivot.

[0020] A guide shaft is rotatably connected to the end of the first push arm away from the first pivot. An elongated guide hole is provided on the base along its axial direction, and the guide shaft is slidably engaged with the guide hole.

[0021] A control component is disposed on the substrate. The control component is used to control the first support plate and the second support plate to swing toward each other or away from each other, and to enable the first push arm and the second push arm to jointly push the liquid extraction module toward or away from the substrate.

[0022] Optionally, the control element includes:

[0023] A first hydraulic cylinder is mounted on the base. The piston end of the first hydraulic cylinder is fixedly connected to a first bracket, and the first bracket is vertically slidably connected to the base.

[0024] The first control shaft is fixed to the end of the first support plate. The first bracket has a first clearance strip hole. The first control shaft is located in the first clearance strip hole and can rotate and slide in the first clearance strip hole so that the first support plate can swing smoothly around the guide shaft.

[0025] A second hydraulic cylinder is mounted on the base. The piston end of the second hydraulic cylinder is fixedly connected to a second bracket, and the second bracket is vertically slidably connected to the base.

[0026] The second control shaft is fixed to the end of the second support plate. The second bracket has a second clearance strip hole. The second control shaft is located in the second clearance strip hole and can rotate and slide in the second clearance strip hole so that the second support plate can swing smoothly around the support shaft.

[0027] The first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the hydraulic module, and the hydraulic module is used to control the first hydraulic cylinder and the second hydraulic cylinder to perform synchronous extension and retraction movements.

[0028] Optionally, the first push arm and the first support plate form a V-shape, and the distance between the first control shaft and the guide shaft is less than the distance between the guide shaft and the first pivot.

[0029] Optionally, the second push arm and the second support plate form a V-shape, and the distance between the second control shaft and the support shaft is smaller than the distance between the support shaft and the second pivot.

[0030] Optionally, the control component further includes an auxiliary lifting rod disposed between the first push arm and the second push arm, one end of the auxiliary lifting rod being rotatably connected to the liquid extraction module via a mounting shaft, and the other end being rotatably connected to the base via a receiving shaft;

[0031] The auxiliary lifting rod is parallel to the second push arm. The distance between the mounting shaft and the receiving shaft is equal to the distance between the second pivot and the support shaft. The distance between the mounting shaft and the second pivot is equal to the distance between the receiving shaft and the support shaft.

[0032] Optionally, the substrate is provided with a receiving groove. When the first support plate and the second support plate swing toward each other and the liquid taking module moves toward the substrate for storage, the first push arm, the second push arm, the first support plate, the second support plate and the liquid taking module can enter the receiving groove respectively, and the liquid taking module is flush with the outer surface of the substrate.

[0033] Optionally, the liquid extraction module includes:

[0034] A seat plate is disposed on the side of the base, and the first push arm and the second push arm are respectively connected to the seat plate;

[0035] The setting ring is made of elastic material and is fixed to the edge of the setting plate away from the base, so that a liquid intake groove is formed between the setting ring and the setting plate;

[0036] A liquid collection channel is formed inside the seat plate, and the seat plate has a liquid inlet hole, which connects the liquid collection tank and the liquid collection channel.

[0037] A collection channel is provided inside the second pivot, and the collection channel is connected to the liquid collection channel;

[0038] The substrate is provided with a suction and storage mechanism, which is connected to the collection channel through a collection hose. The suction and storage mechanism is used to create a negative pressure in the liquid extraction tank and to extract and store the well fluid in the liquid extraction tank.

[0039] Optionally, the end of the second pivot near the liquid intake channel is sealed to the seat plate by a sealing ring.

[0040] Optionally, the seat plate has a clearance groove on the side facing the base, so that when the seat plate moves toward the base and is retracted, part of the core-taking module can enter the clearance groove.

[0041] As can be seen from the above technical solution, the isotopic sampling device provided by the present invention has the following advantages:

[0042] This device positions the core sampling module and the fluid sampling module on the substrate at a 180° interval. After the core sampling module completes its core sampling, simply rotating the substrate 180° via a rotating section automatically aligns the fluid sampling module with the sampling hole, facilitating the sampling of well fluid from the hole. This design eliminates the need for frequent vertical movement of the substrate, improving operational convenience and saving time, thus increasing sampling efficiency. Furthermore, this design ensures a high degree of alignment between the fluid sampling module and the sampling hole, allowing for precise sampling of well fluid and improving overall sampling accuracy.

[0043] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0044] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0045] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0046] Figure 2 is a schematic diagram of the structure of the substrate in an embodiment of the present invention;

[0047] Figure 3 is an enlarged schematic diagram of region A in Figure 1;

[0048] Figure 4 is a schematic diagram of the structure of the driving component and the control component in an embodiment of the present invention;

[0049] Figure 5 is a schematic diagram of the structure of the driving component and the liquid extraction module in an embodiment of the present invention;

[0050] Figure 6 is a side view of the substrate in an embodiment of the present invention;

[0051] Figure 7 is a schematic diagram of the liquid extraction module in an embodiment of the present invention;

[0052] Figure 8 is an enlarged schematic diagram of region B in Figure 7;

[0053] Figure 9 is a schematic diagram of the suction and storage mechanism in an embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Matrix; 2. Rotating short section; 3. Clamping module; 31. Clamping arm; 4. Cable retraction / deployment; 5. Core extraction module; 6. Liquid extraction module; 61. Setting plate; 62. Setting ring; 63. Liquid extraction tank; 64. Liquid extraction channel; 65. Liquid inlet; 66. Collection channel; 67. Suction and storage mechanism; 671. Piston pump; 672. Liquid storage tank; 68. Collection hose; 7. Drive component; 71. First push arm; 72. First pivot; 73. First support plate; 74. Second push arm; 75. Second pivot; 76. Support shaft; 77. Second support plate; 78. 79. Guide shaft; 80. Guide hole; 91. Pushing module; 102. First pushing arm; 11. Second pushing arm; 12. Hydraulic module; 13. Control component; 14. First hydraulic cylinder; 15. First bracket; 16. First control shaft; 17. First clearance strip hole; 18. Second hydraulic cylinder; 19. Second bracket; 100. Second control shaft; 101. Second clearance strip hole; 102. Auxiliary lifting rod; 11. Receiving groove; 12. Sealing ring; 13. Rotating groove; 14. Sealing groove; 15. Clearance groove; 16. Mounting shaft; 17. Receiving shaft. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be arbitrarily combined with each other.

[0057] Figures 1 to 9 illustrate an embodiment of the present invention, which discloses a co-sampling device. The device includes a vertically positioned base 1 with a rotating section 2 at its top. The rotating section 2 has a clamping module 3 that can abut against the well wall to secure it. The rotating section 2 also controls the rotation of the base 1, and a retractable cable 4 is connected to its top to facilitate the retraction and deployment of the rotating section 2 and the base 1 within the well.

[0058] In one embodiment, as shown in Figures 1 and 2, a core sampling module 5 and a fluid sampling module 6 are provided on the substrate 1. The core sampling module 5 is used to sample the rock core, and the fluid sampling module 6 is movably connected to the substrate 1 and is used to sample the well fluid. Simultaneously, a drive component 7 is provided on the substrate 1 to control the horizontal movement of the fluid sampling module 6, so that the fluid sampling module 6 is pressed against and seated against the well wall.

[0059] In one embodiment, as shown in Figures 1 and 2, a push-fit module 8 is provided on the base 1, which is used to press against the well wall. Simultaneously, a hydraulic module 9 is provided on the base 1, and the hydraulic module 9 provides power to the pressing module 3, the core-taking module 5, and the push-fit module 8.

[0060] In one embodiment, as shown in Figures 1 and 2, the liquid sampling module 6 and the push-fit module 8 are respectively arranged 180° apart from the core sampling module 5. The liquid sampling module 6 and the push-fit module 8 are located in the same vertical plane, and the core sampling module 5 and the liquid sampling module 6 are located in the same horizontal plane. After the core sampling module 5 opens a sampling hole in the well wall and completes core sampling, the base 1 is rotated 180° by rotating the short section 2, so that the liquid sampling module 6 can be aligned with the sampling hole.

[0061] When sampling is required, the rotating section 2 is controlled by the cable retraction / extension 4 to drive the vertical movement of components such as the base 1. When the core sampling module 5 reaches the designated position, the hydraulic module 9 controls the clamping module 3 to work, making the clamping module 3 firmly fixed against the well wall. Subsequently, the hydraulic module 9 controls the pushing module 8 to work, making the pushing module 8 press against the well wall. At this time, the hydraulic module 9 controls the core sampling module 5 to work, opening a sampling hole in the well wall and sampling the rock inside the sampling hole.

[0062] Subsequently, the hydraulic module 9 controls the push module 8 and the core sampling module 5 to reset, and then the rotating sub 2 controls the base 1 to rotate 180°. At this point, the fluid sampling module 6 is aligned with the sampling hole. Next, the drive component 7 controls the movement of the fluid sampling module 6, causing it to press against the well wall and cover the sampling hole. The fluid sampling module 6 then extracts the well fluid from the sampling hole, completing the sampling operation. If sampling is required at different locations around the well wall, the angle of the base 1 is adjusted by rotating the sub 2, and the above steps are repeated to achieve core sampling at multiple locations on the same horizontal plane.

[0063] In this embodiment, the co-sampling device sets the core sampling module 5 and the fluid sampling module 6 on the base 1 at a 180° interval. After the core sampling module 5 completes the core sampling operation, the base 1 only needs to be rotated 180° by rotating the short section 2, and the fluid sampling module 6 will automatically align with the sampling hole, thus facilitating the sampling of well fluid from the sampling hole. This design eliminates the need for frequent vertical movement of the base 1, improving operational convenience and saving time, thereby increasing sampling efficiency. Furthermore, since the core sampling module 5 and the fluid sampling module 6 are located on the same horizontal plane, rotating the base 1 by rotating the short section 2 by 180° allows the fluid sampling module 6 to automatically align with the sampling hole, and the alignment between the fluid sampling module 6 and the sampling hole is relatively high, enabling the fluid sampling module 6 to accurately sample the well fluid from the sampling hole, thereby improving sampling accuracy.

[0064] In one embodiment, as shown in Figures 1 and 2, a drive motor is provided inside the rotating section 2, and the drive motor is coaxially and fixedly connected to the base 1, so that the rotating section 2 can control the rotation of the base 1, thereby realizing the adjustment of the position of the core sampling module 5 and the liquid sampling module 6.

[0065] In one embodiment, as shown in Figures 1 and 2, the core-taking module 5 in this application has the same structure as the core-taking module in patent CN113494257A. Since the core-taking module has been described in detail in patent CN113494257A, it will not be repeated here. The hydraulic module 9 in this application has the same structure as the hydraulic module in patent CN113494257A, also consisting of multiple integrated hydraulic control valve groups. It can hydraulically control multiple components, enabling the hydraulic module 9 to provide power for the movement, tilting, and core-pushing of the core-taking module 5.

[0066] In one embodiment, as shown in Figures 1 and 2, the clamping module 3 includes a pair of clamping arms 31 slidably connected to the rotating sub 2, and the pair of clamping arms 31 are symmetrically distributed on both sides of the rotating sub 2. At the same time, the clamping arms 31 are connected to the hydraulic module 9 through a hydraulic oil circuit, so that the pumping and returning oil operations of the hydraulic module 9 can hydraulically control the two clamping arms 31 to move synchronously and extend, thereby realizing the fixing and release of the rotating sub 2 from the well wall.

[0067] In one embodiment, as shown in Figures 1 and 2, the push-back module 8 includes a first push-back arm 81 and a second push-back arm 82. The first push-back arm 81 and the second push-back arm 82 have the same structure as the upper push-back arm and the auxiliary push-back arm in patent CN113494257A. The first push-back arm 81 and the second push-back arm 82 are respectively connected to the hydraulic module 9 through hydraulic oil circuits. The first push-back arm 81 and the second push-back arm 82 can extend and unfold respectively under hydraulic action.

[0068] In one embodiment, as shown in Figures 3 and 4, the driving component 7 includes a first push arm 71, which is rotatably connected to the bottom end of the liquid extraction module 6 via a first pivot 72. Simultaneously, a first support plate 73 is integrally formed and connected to the end of the first push arm 71 away from the first pivot 72. The driving component 7 also includes a second push arm 74, which is rotatably connected to the bottom end of the liquid extraction module 6 via a second pivot 75. Simultaneously, a second push arm 74 is rotatably connected to the base 1 via a support shaft 76 at the end of the second push arm 74 away from the second pivot 75, and a second support plate 77 is integrally formed and connected to the end of the second push arm 74 away from the second pivot 75.

[0069] In one embodiment, as shown in Figures 3 and 4, the end of the first push arm 71 away from the first pivot 72 is rotatably connected to a guide shaft 78, and a long strip-shaped guide hole 79 is provided on the base 1 along its axial direction, and the guide shaft 78 and the guide hole 79 are slidably engaged.

[0070] In one embodiment, as shown in Figures 3 and 4, a control element 10 is provided on the substrate 1. The control element 10 is used to control the first support plate 73 and the second support plate 77 to swing toward each other or away from each other, and to enable the first push arm 71 and the second push arm 74 to jointly push the liquid extraction module 6 toward or away from the substrate 1.

[0071] The first support plate 73 and the second support plate 77 are controlled by the control unit 10 to swing towards each other. At this time, the second support plate 77 drives the second push arm 74 to rotate around the support shaft 76 and pushes the liquid extraction module 6 outward (towards the well wall). At the same time, the first support plate 73 drives the first push arm 71 to rotate around the guide shaft 78, while the guide shaft 78 slides along the guide hole 79 (sliding upward). Then, the first push arm 71 and the second push arm 74 can jointly push out the liquid extraction module 6, thereby making the liquid extraction module 6 sit and seal on the well wall.

[0072] Similarly, the first support plate 73 and the second support plate 77 are controlled by the control component 10 to swing in a direction away from each other. At this time, the second support plate 77 drives the second push arm 74 to rotate around the support shaft 76 and pulls the liquid extraction module 6 inward (towards the base 1). At the same time, the first support plate 73 drives the first push arm 71 to rotate around the guide shaft 78, while the guide shaft 78 slides along the guide hole 79 (sliding downward). Then, the first push arm 71 and the second push arm 74 can work together to pull the liquid extraction module 6 back, thereby realizing the storage of the liquid extraction module 6.

[0073] In one embodiment, as shown in Figures 3 and 4, the control component 10 includes a first hydraulic cylinder 101 disposed on the base 1. The piston end of the first hydraulic cylinder 101 is fixedly connected to a first bracket 102, and the first bracket 102 is vertically slidably connected to the base 1. Simultaneously, a first control shaft 103 is fixedly connected to the end of the first support plate 73. A first clearance slot 104 is provided on the first bracket 102. The first control shaft 103 is located within the first clearance slot 104 and can rotate and slide within the first clearance slot 104 to achieve clearance, thereby allowing the first support plate 73 to swing smoothly around the guide shaft 78.

[0074] In one embodiment, as shown in Figures 3 and 4, the control component 10 further includes a second hydraulic cylinder 105 disposed on the base 1. The piston end of the second hydraulic cylinder 105 is fixedly connected to a second bracket 106, and the second bracket 106 is vertically slidably connected to the base 1. Simultaneously, a second control shaft 107 is fixedly connected to the end of the second support plate 77. A second clearance slot 108 is provided on the second bracket 106. The second control shaft 107 is located within the second clearance slot 108 and can rotate and slide within the second clearance slot 108 to achieve clearance, thereby allowing the second support plate 77 to swing smoothly around the support shaft 76.

[0075] In one embodiment, as shown in Figures 2 and 4, the piston ends of the first hydraulic cylinder 101 and the second hydraulic cylinder 105 are close to each other, and the first hydraulic cylinder 101 and the second hydraulic cylinder 105 are respectively connected to the hydraulic module 9 through hydraulic oil circuits. The pumping and returning oil operations of the hydraulic module 9 can control the first hydraulic cylinder 101 and the second hydraulic cylinder 105 to perform synchronous extension and retraction movements.

[0076] When the piston ends of the first hydraulic cylinder 101 and the second hydraulic cylinder 105 extend simultaneously, the first support 102 and the second support 106 approach each other. At this time, the first support 102 drives the first control shaft 103 to move, and the first control shaft 103 slides in the first clearance slot 104. Then, the first control shaft 103 can control the movement of the first support plate 73. At the same time, the second support 106 drives the second control shaft 107 to move, and the second control shaft 107 slides in the second clearance slot 108. Then, the second control shaft 107 can control the movement of the second support plate 77, thereby causing the first support plate 73 and the second support plate 77 to swing towards each other, thus causing the liquid extraction module 6 to be seated on the well wall.

[0077] Similarly, when the piston ends of the first hydraulic cylinder 101 and the second hydraulic cylinder 105 retract simultaneously, the first bracket 102 and the second bracket 106 move away from each other. At this time, the first bracket 102 drives the first control shaft 103 to move, and the first control shaft 103 slides in the first clearance slot 104. Then, the first control shaft 103 can control the movement of the first support plate 73. At the same time, the second bracket 106 drives the second control shaft 107 to move, and the second control shaft 107 slides in the second clearance slot 108. Then, the second control shaft 107 can control the movement of the second support plate 77, thereby causing the first support plate 73 and the second support plate 77 to swing in a direction away from each other, thus allowing the liquid extraction module 6 to be stored.

[0078] In this embodiment, the movement of the liquid sampling module 6 is controlled by the first push arm 71 and the second push arm 74. When the liquid sampling module 6 is pushed out, a large space is formed between the first push arm 71, the liquid sampling module 6 and the second push arm 74 and the base 1, which can provide more room for the rotation of the core sampling module 5. That is, the core sampling module 5 has a larger rotatable space, which allows the drill bit of the core sampling module 5 to be set longer, so as to achieve sampling operations at a deeper level of the well wall.

[0079] In one embodiment, as shown in Figures 4 and 5, the first push arm 71 and the first support plate 73 form a V-shape, and the second push arm 74 and the second support plate 77 form a V-shape, with their openings facing each other. Simultaneously, the distance between the first control shaft 103 and the guide shaft 78 is less than the distance between the guide shaft 78 and the first pivot 72, and the distance between the second control shaft 107 and the support shaft 76 is less than the distance between the support shaft 76 and the second pivot 75.

[0080] Because the first hydraulic cylinder 101 controls the first support plate 73 to drive the first push arm 71 to swing, and the distance between the first control shaft 103 and the guide shaft 78 is less than the distance between the guide shaft 78 and the first pivot 72, meaning the guide shaft 78 is not located at the center between the first support plate 73 and the first push arm 71, the weight of the first push arm 71 is greater than the weight of the first support plate 73. This causes a "one-sided heaviness" situation during the swinging process of the first support plate 73 driving the first push arm 71. In other words, under the action of gravity, the first push arm 71 can swing smoothly, thereby enabling the liquid extraction module 6 to move stably outward. Similarly, the distance between the second control shaft 107 and the support shaft 76 is less than the distance between the support shaft 76 and the second pivot 75, and its function is the same as described above, thereby enabling the first push arm 71 and the second push arm 74 to stably push the liquid extraction module 6 outward.

[0081] In one embodiment, as shown in Figures 2, 4, and 5, the control component 10 further includes an auxiliary lifting rod 109 disposed between the first push arm 71 and the second push arm 74. One end of the auxiliary lifting rod 109 is rotatably connected to the liquid extraction module 6 via a mounting shaft 16, and the other end is rotatably connected to the base 1 via a receiving shaft 17. Simultaneously, the auxiliary lifting rod 109 is parallel to the second push arm 74, the distance between the mounting shaft 16 and the receiving shaft 17 is equal to the distance between the second pivot 75 and the support shaft 76, and the distance between the mounting shaft 16 and the second pivot 75 and the distance between the receiving shaft 17 and the support shaft 76 are equal.

[0082] Because the distance between the mounting shaft 16 and the receiving shaft 17 is equal to the distance between the second pivot 75 and the support shaft 76, and the distance between the mounting shaft 16 and the second pivot 75 and the distance between the receiving shaft 17 and the support shaft 76 are equal, the auxiliary lifting rod 109, the second push arm 74, the base 1, and the liquid extraction module 6 can form a parallelogram, with the second push arm 74 and the auxiliary lifting rod 109 forming two sides of the parallelogram. When the second push arm 74 swings, the auxiliary lifting rod 109 can swing synchronously. At this time, the auxiliary lifting rod 109 can stably lift the liquid extraction module 6, thereby enabling the liquid extraction module 6 to move smoothly and reducing the risk of the liquid extraction module 6 getting stuck.

[0083] Meanwhile, the movement of the liquid extraction module 6 in this application is quite unique. The second push arm 74 and the auxiliary lifting rod 109 only rotate, allowing the liquid extraction module 6 to stably move away from the base 1, thus ensuring that the liquid extraction module 6 can rise smoothly. However, the first push arm 71 can both swing and move vertically. That is, the vertical movement of the first push arm 71 enables the liquid extraction module 6 to move outward or inward. Compared to the mode where the first push arm 71 and the second push arm 74 can move vertically synchronously, this design can ensure that the liquid extraction module 6 can move smoothly and effectively reduce the risk of the liquid extraction module 6 getting stuck.

[0084] In one embodiment, as shown in Figures 2, 3, 4, and 6, a receiving groove 11 is formed on the surface of the base 1. When the first support plate 73 and the second support plate 77 swing away from each other, and the liquid sampling module 6 moves toward the base 1 for storage, the first push arm 71, the second push arm 74, the first support plate 73, the second support plate 77, and the liquid sampling module 6 can respectively enter the receiving groove 11, making the liquid sampling module 6 flush with the outer surface of the base 1. This reduces the overall size of the base 1, allowing it to be lowered into wells with smaller inner diameters, thus improving its adaptability. Simultaneously, the core sampling module 5, after being stored, can also be embedded in the base 1, further improving the compactness of the sampling device and reducing its overall size, enabling the base 1 to be lowered into wells with smaller inner diameters.

[0085] In one embodiment, as shown in Figures 2, 5, and 7, the liquid sampling module 6 includes a setting plate 61 disposed on the side of the base 1, and a first push arm 71 and a second push arm 74 are respectively connected to the setting plate 61. An elastic setting ring 62 is fixedly connected to the edge of the setting plate 61 away from the base 1, forming a liquid sampling groove 63 between the setting ring 62 and the setting plate 61, and the liquid sampling groove 63 can cover the sampling port. In this embodiment, the setting ring 62 is made of elastic materials such as rubber or latex, or silicone; any other elastic material capable of pressing against the well wall and forming a stable setting is acceptable.

[0086] In one embodiment, as shown in Figures 7 and 8, a liquid intake channel 64 is formed inside the seat plate 61, and a liquid inlet hole 65 is formed on the surface of the seat plate 61, which connects the liquid intake tank 63 to the liquid intake channel 64. At the same time, a collection channel 66 is formed inside the second pivot 75, and the collection channel 66 is connected to the liquid intake channel 64.

[0087] In one embodiment, as shown in Figures 7, 8, and 9, a suction and storage mechanism 67 is provided on the substrate 1. The suction and storage mechanism 67 is connected to the collection channel 66 through a collection hose 68. The suction and storage mechanism 67 is used to create a negative pressure in the liquid extraction tank 63 and to extract and store the well fluid in the liquid extraction tank 63.

[0088] In one embodiment, as shown in Figures 7, 8, and 9, the collection channel 66 extends to the second push arm 74. The upper suction and storage mechanism 67 includes a piston pump 671 and a storage tank 672. The inlet end of the piston pump 671 is connected to a collection hose 68, which is fixedly connected to the first push arm 74 and communicates with the collection channel 66. Simultaneously, the outlet end of the piston pump 671 is connected to the storage tank 672, and the piston pump 671 can also be connected to a hydraulic module 9, enabling the hydraulic module 9 to control the operation of the piston pump 671, thereby achieving stable extraction of well fluid from the sampling hole. In other embodiments, the piston pump 671 can also be replaced by an electric suction pump, as long as it can achieve the extraction of well fluid.

[0089] When the setting ring 62 is set with the well wall and the sampling tank 63 covers the sampling hole, the piston pump 671 is started to create a negative pressure in the sampling tank 63. At this time, the well fluid in the sampling hole can enter the sampling tank 63, and then enter the storage tank 672 in sequence through the inlet hole 65, the sampling channel 64 and the collection channel 66, thereby realizing the sampling and collection of well fluid.

[0090] In one embodiment, as shown in Figure 8, the end of the second pivot 75 near the fluid intake channel 64 is sealed to the setting plate 61 by a sealing ring 12. Specifically, the setting plate 61 has a rotating groove 13, and the second pivot 75 rotates within the rotating groove 13. Simultaneously, the sealing ring 12 is fixedly fitted onto the second pivot 75, and a sealing groove 14 is formed on the inner wall of the rotating groove 13, with the sealing ring 12 engaging within the sealing groove 14 to reduce the risk of leakage. In other embodiments, the second pivot 75 and the setting plate 61 can also be connected by a sealed bearing, enabling both rotation of the second pivot 75 and sealing between the second pivot 75 and the setting plate 61. This allows the well fluid in the fluid intake channel 64 to stably enter the collection channel 66, further reducing the risk of leakage.

[0091] In one embodiment, as shown in Figures 2 and 5, a clearance groove 15 is provided on the side of the seat plate 61 facing the base 1. When the seat plate 61 moves toward the base 1 and is retracted, some parts of the core module 5 facing the seat plate 61 can enter the clearance groove 15, thereby providing good clearance capability and reducing the risk of interference between the core module 5 and the seat plate 61. This not only improves the structural compactness of the sampling device but also reduces the overall size of the sampling device, making transportation and other operations more convenient.

[0092] As described above, with this device, after the core sampling module 5 completes the core sampling operation, the fluid sampling module 6 can automatically align with the sampling hole by controlling the base 1 to rotate 180° via the rotating section 2, thus facilitating the sampling of well fluid from the sampling hole. This design eliminates the need for frequent vertical movement of the base 1, improving operational convenience and saving time, thereby increasing sampling efficiency.

[0093] Meanwhile, this design only requires rotating the base 1 by 180° via the rotating short section 2 to automatically align the liquid sampling module 6 with the sampling hole, resulting in a high degree of alignment between the liquid sampling module and the sampling hole. This allows the liquid sampling module 6 to accurately sample the well fluid in the sampling hole, thereby improving the sampling accuracy.

[0094] Moreover, this design makes the sampling device more compact. When the liquid sampling component is away from the substrate 1, it can provide more space for the rotation and other actions of the core sampling module 5, so that the core sampling module 5 can perform flipping and other actions smoothly. In addition, the core sampling drill bit of the core sampling module 5 can be set to be longer, thereby realizing deep sampling operations.

[0095] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should have the ordinary meaning as understood by one of ordinary skill in the art.

[0096] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cosine sampling device, characterized in that, include: The base (1) is vertically arranged; a rotating section (2) is located at the top of the base (1), and a clamping module (3) is provided on the rotating section (2) to clamp and fix it against the well wall. A take-up and retractable cable (4) is connected to the top of the rotating section (2), and the rotating section (2) is used to control the rotation of the base (1); a core sampling module (5) is located on the base (1) and is used to sample the core; a fluid sampling module (6) is movably connected to the base (1) and is used to sample the well fluid; a drive unit (7) is located on the base (1) and is used to control the horizontal movement of the fluid sampling module (6) and to clamp the fluid sampling module (6) against the well wall; a push module (8) is located on the base (1). On the base (1), and used to press against the well wall; hydraulic module (9), set on the base (1), and the hydraulic module (9) can provide power to the pressing module (3), the core module (5) and the pushing module (8); wherein, the liquid sampling module (6) and the pushing module (8) are respectively set at a distance of 180° from the core module (5), the liquid sampling module (6) and the pushing module (8) are located in the same vertical plane, the core module (5) and the liquid sampling module (6) are located in the same horizontal plane, so that the core module (5) completes the core sampling, and after the base (1) is rotated 180° by the rotating short section (2), the liquid sampling module (6) can be aligned with the sampling hole; the driving component ( 7) Includes: a first push arm (71), which is rotatably connected to the bottom end of the liquid extraction module (6) via a first pivot (72), and a first support plate (73) is provided at the end of the first push arm (71) away from the first pivot (72); a second push arm (74), which is rotatably connected to the top end of the liquid extraction module (6) via a second pivot (75), and a second support plate (77) is provided at the end of the second push arm (74) away from the second pivot (75) and the base (1) via a support shaft (76), and a guide shaft (78), which is rotatably connected to the end of the first push arm (71) away from the first pivot (72). The base (1) has an elongated guide hole (79) along its axial direction, and the guide shaft (78) is slidably engaged with the guide hole (79); a control component (10) is disposed on the base (1), and the control component (10) is used to control the first support plate (73) and the second support plate (77) to swing toward each other or away, and to enable the first push arm (71) and the second push arm (74) to jointly push the liquid extraction module (6) toward or away from the base (1); the liquid extraction module (6) includes: a seat sealing plate (61) disposed on the side of the base (1), and the first push arm (71) and the second push arm (74) are respectively connected to the seat sealing plate (61);A setting ring (62) is made of elastic material and is fixed to the edge of the setting plate (61) away from the base (1), forming a liquid collection groove (63) between the setting ring (62) and the setting plate (61); a liquid collection channel (64) is opened inside the setting plate (61), and the setting plate (61) has a liquid inlet hole (65), which connects the liquid collection groove (63) and the liquid collection channel (64); a collection flow... A collection channel (66) is located inside the second pivot (75), and the collection channel (66) is connected to the liquid extraction channel (64); wherein, a suction and storage mechanism (67) is provided on the base (1), the suction and storage mechanism (67) is connected to the collection channel (66) through a collection hose (68), and the suction and storage mechanism (67) is used to create a negative pressure in the liquid extraction tank (63) and to extract and store the well fluid in the liquid extraction tank (63).

2. The isotopic sampling device according to claim 1, characterized in that, The control component (10) includes: a first hydraulic cylinder (101) disposed on the base (1), the piston end of the first hydraulic cylinder (101) being fixedly connected to a first bracket (102), and the first bracket (102) being vertically slidably connected to the base (1); a first control shaft (103) fixed to the end of the first support plate (73), the first bracket (102) having a first clearance slot (104) provided thereon, the first control shaft (103) being located in the first clearance slot (104) and being able to rotate and slide within the first clearance slot (104) so ​​that the first support plate (73) can swing smoothly around the guide shaft (78); and a second hydraulic cylinder (105) disposed on the base (1), the piston end of the second hydraulic cylinder (105) being fixedly connected to a first bracket (102), and the first control shaft (103 ...) being fixedly connected to the base (1), the first control shaft (103) being fixedly connected to the base (1), the first control shaft (103) being fixedly connected to the base (1), the first control shaft (103) being fixedly connected to the base (1), the first control shaft ( A second bracket (106) is fixedly connected and vertically slidably connected to the base (1); a second control shaft (107) is fixed to the end of the second support plate (77), and a second clearance slot (108) is provided on the second bracket (106). The second control shaft (107) is located in the second clearance slot (108) and can rotate and slide in the second clearance slot (108) so that the second support plate (77) can swing smoothly around the support shaft (76); wherein, the first hydraulic cylinder (101) and the second hydraulic cylinder (105) are respectively connected to the hydraulic module (9), and the hydraulic module (9) is used to control the first hydraulic cylinder (101) and the second hydraulic cylinder (105) to perform synchronous telescopic movements.

3. The isotopic sampling device according to claim 2, characterized in that, The first push arm (71) and the first support plate (73) form a V-shape, and the distance between the first control shaft (103) and the guide shaft (78) is less than the distance between the guide shaft (78) and the first pivot (72).

4. The isotopic sampling device according to claim 2, characterized in that, The second push arm (74) and the second support plate (77) form a V-shape, and the distance between the second control shaft (107) and the support shaft (76) is less than the distance between the support shaft (76) and the second pivot (75).

5. The isotopic sampling device according to claim 2, characterized in that, The control component (10) further includes an auxiliary lifting rod (109) disposed between the first push arm (71) and the second push arm (74). One end of the auxiliary lifting rod (109) is rotatably connected to the liquid extraction module (6) via an mounting shaft (16), and the other end is rotatably connected to the base (1) via a receiving shaft (17). The auxiliary lifting rod (109) is parallel to the second push arm (74). The distance between the mounting shaft (16) and the receiving shaft (17) is equal to the distance between the second pivot (75) and the support shaft (76). The distance between the mounting shaft (16) and the second pivot (75) is equal to the distance between the receiving shaft (17) and the support shaft (76).

6. The isotopic sampling device according to claim 1, characterized in that, The substrate (1) is provided with a receiving groove (11). When the first support plate (73) and the second support plate (77) swing in a direction away from each other and the liquid taking module (6) moves toward the substrate (1) for storage, the first push arm (71), the second push arm (74), the first support plate (73), the second support plate (77) and the liquid taking module (6) can enter the receiving groove (11) respectively, and the liquid taking module (6) is flush with the outer surface of the substrate (1).

7. The isotopic sampling device according to claim 1, characterized in that, The second pivot (75) near the liquid flow channel (64) is sealed to the seat plate (61) by a sealing ring (12).

8. The isotopic sampling device according to claim 1, characterized in that, The seat plate (61) has a relief groove (15) on the side facing the base (1). When the seat plate (61) moves toward the base (1) and is stored, part of the core extraction module (5) can enter the relief groove (15).

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