A ground sampling and detection device for reservoir logging geological exploration

Abstract

This utility model discloses a groundwater sampling and testing device for oil reservoir logging geological exploration, including a sampling box. The sampling box includes a box body and an end cap. The upper end of the box body is set as an opening, and the end cap is sealed at the opening of the box body. A liquid inlet is provided on the sampling box, and a blocking mechanism is provided at the liquid inlet. The blocking mechanism can adjust the patency of the liquid inlet. This utility model provides a blocking mechanism at the liquid inlet of the sampling box, which can make the liquid inlet unobstructed after the sampling box descends to a certain depth. At the same time, groundwater at that depth flows into the sampling box. After sampling is completed, the liquid inlet is blocked by the blocking mechanism. This setting can effectively prevent groundwater from other depths from entering the sampling box and improve the accuracy of the detection.

Description

Technical Field

[0001] This utility model relates to the field of underground liquid sampling technology, specifically an underground sampling and detection device for oil reservoir logging geological exploration. Background Technology

[0002] Petroleum exploration refers to the process of finding and identifying oil and gas resources by utilizing various exploration methods to understand underground geological conditions, recognize conditions related to oil generation, storage, migration, accumulation, and preservation, comprehensively evaluate oil and gas prospects, identify favorable areas for oil and gas accumulation, locate oil and gas traps, determine the area of ​​oil and gas fields, and clarify the characteristics and production capacity of oil and gas layers. During petroleum well logging geological exploration, groundwater sampling and testing are required. Groundwater sampling involves drilling deep wells on the surface and then placing sampling equipment into the deep wells to collect samples.

[0003] Currently, in order to achieve sampling operations from deep underground, a utility model patent with publication number CN110220749B provides a sampling and detection device for monitoring excessive chemical impurities in groundwater. This device includes a detection device and a water sampling mechanism. The detection device is housed within an equipment cavity and connected to the water sampling mechanism via a water pump. The water sampling mechanism is mounted on one side of the equipment cavity via a connecting rod. The water sampling mechanism includes a traction mechanism mounted on a support, a weight suspended by the traction mechanism that has an anti-clogging effect and controllable conductivity, and a pumping pipe connecting the weight and the water pump.

[0004] However, when using the device provided by the aforementioned patent for underground sampling in oil well logging geological exploration, it is not convenient to perform fixed-depth sampling of groundwater at different depths. That is, during the descent of the sampling box, water from other depths will enter the sampling box, resulting in inaccurate sampling results. Therefore, we have proposed an underground sampling and detection device for oil well logging geological exploration to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an underground sampling and detection device for oil reservoir logging geological exploration, which aims to improve the problem that existing underground liquid sampling devices cannot collect water samples from only a certain depth.

[0006] This utility model is implemented as follows: an underground sampling and testing device for oil reservoir logging geological exploration includes a sampling box, which includes a box body and an end cap. The upper end of the box body is set as an opening, and the end cap is sealed at the opening of the box body. A liquid inlet is provided on the sampling box, and a blocking mechanism is provided at the liquid inlet. The blocking mechanism can adjust the patency of the liquid inlet.

[0007] Preferably, the lower end of the box is configured as a frustum structure, and an output pipe is provided at the lower position. An annular baffle and a first thread are provided on the inner side of the box, with the first thread located above the annular baffle.

[0008] Preferably, a hanging ring is provided on the upper part of the end cap, and a threaded hole is provided on the edge. A bolt is threaded through the threaded hole. A second thread is provided on the end cap and is threadedly connected to the box body. The lower end of the end cap contacts the annular baffle, and the lower end of the bolt is set to press against the annular baffle.

[0009] Preferably, the end cap is provided with a second liquid inlet hole, and a plugging mechanism can be sealed and inserted into the second liquid inlet hole. The plugging mechanism is configured as a plugging column. A motor is connected to the bottom of the end cap via a connecting rod. A threaded column is provided on the output shaft of the motor. The upper end of the threaded column is threaded into the threaded groove of the plugging column.

[0010] Preferably, both the second inlet hole and the plugging column are configured as inverted frustum structures, with a sealing layer and a support plate on the plugging column, and a connecting rod sleeved at the end of the support plate.

[0011] Preferably, the end cap is provided with a second liquid inlet hole, the side wall of the second liquid inlet hole is provided with a limiting groove, and a second internal threaded tube is provided through it. The wing plate of the second internal threaded tube extends into the limiting groove, and a blocking mechanism is fixedly provided at the upper end. The blocking mechanism is a sealing cover. A motor is provided below the end cap through a connecting rod. A threaded post is provided on the output shaft of the motor, and the upper end of the threaded post is threaded into the second internal threaded tube.

[0012] Preferably, the inner side of the box is provided with multiple partition plates, and the side wall is provided with multiple first liquid inlet holes, which are located in the gaps between adjacent partition plates. A blocking mechanism is provided on the outer side of the box, and the blocking mechanism is a blocker.

[0013] Preferably, the blocker includes a blocking plate, a motor, and two annular connecting plates. The two annular connecting plates are fixedly installed at the upper and lower ends of the blocking plate and are fitted onto the housing. The blocking plate is provided with toothed grooves, and gears are meshed on the sides of the toothed grooves. The gears are connected to the motor, and the motor is installed on the end cover. The blocking plate is provided with multiple third liquid inlets, which are staggered and can be directly opposite the first liquid inlets.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model has a blocking mechanism at the liquid inlet of the sampling box. After the sampling box descends to the corresponding depth, the liquid inlet is unobstructed, and groundwater at that depth flows into the sampling box. After sampling is completed, the liquid inlet is blocked by the blocking mechanism. This design can effectively prevent groundwater from other depths from entering the sampling box and improve the accuracy of the test.

[0016] 2. This utility model is equipped with a first liquid inlet hole and a plug. The operation of the plug can control the unobstructedness of multiple first liquid inlets one by one, so as to complete the sampling of groundwater at different depths during the descent of the sampling box, thereby improving the sampling efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the first embodiment of the present utility model;

[0018] Figure 2 This is a utility model Figure 1 A schematic diagram of the first solid-state structure of the middle box;

[0019] Figure 3 This is a utility model Figure 1 A three-dimensional structural diagram of the middle end cap;

[0020] Figure 4 This is a utility model Figure 3 A three-dimensional structural schematic diagram of the middle end cap and the blocking mechanism;

[0021] Figure 5 This is a utility model Figure 3 A schematic diagram of the second three-dimensional structure of the middle end cap and the blocking mechanism;

[0022] Figure 6 This is a schematic diagram of the second three-dimensional structure of an embodiment of the present utility model;

[0023] Figure 7 This is a utility model Figure 8 A schematic diagram of the second solid-state structure of the middle box;

[0024] Figure 8 This is a utility model Figure 8 A three-dimensional structural diagram of the blocker.

[0025] In the diagram: 1. Box body; 11. Counterweight; 12. Annular baffle; 13. First internal threaded pipe; 14. Output pipe; 15. First liquid inlet; 16. Divider plate; 2. Collection bottle; 3. End cap; 31. Threaded hole; 32. Connecting rod; 33. Motor; 34. Threaded column; 35. Second liquid inlet; 36. Restriction groove; 4. Blocking column; 41. Support plate; 5. Sealing cap; 51. Second internal threaded pipe; 6. Blocker; 61. Blocking plate; 62. Annular connecting plate; 63. Third liquid inlet; 64. Tooth groove; 65. Gear. Detailed implementation method:

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0028] Example 1

[0029] like Figure 1 , Figure 2 , Figure 3 As shown, an underground sampling and testing device for oil reservoir logging geological exploration includes a box body 1, an end cap 3, and a counterweight 11. The box body 1 and the end cap 3 form a sampling box. The lower end of the box body 1 is designed as a frustum, and an output pipe 14 is provided at the lower position. The output pipe 14 can seal a threaded connection plug or a threaded connection collection bottle 2. A first internally threaded pipe 13 is also provided below the box body 1. The counterweight 11 is provided below the first internally threaded pipe 13. A screw is provided on the counterweight 11, and the screw thread is inserted into the first internally threaded pipe 13. Under the action of the counterweight 11, the center of gravity of the device is lowered, and the gravity of the sampling box is increased, so that the device can rise and fall stably in underground liquid. The upper end of the box body 1 is open, and an annular baffle 12 and a first thread are provided on the inner side of the box body 1. The first thread is located above the annular baffle 12. At the same time, a second thread is provided on the end cover 3, which is adapted to the first thread. Therefore, the end cover 3 is threadedly connected to the box body 1. The lower end of the end cover 3 contacts the annular baffle 12. A sealing gasket is provided at the contact point between the annular baffle 12 and the end cover 3, so as to achieve a sealed and detachable connection between the end cover 3 and the box body 1. In addition, in order to restrict the rotation of the end cover 3 relative to the box body 1, a threaded hole 31 is provided on the edge of the end cover 3. A bolt is threaded through the threaded hole 31. The lower end of the bolt presses against the sealing gasket and the annular baffle 12, increasing the resistance to the rotation of the end cover 3 relative to the box body 1, and effectively controlling the end cover 3 and the box body 1 to remain relatively stationary. In order to facilitate the control of the device's lifting and lowering in the well, a hanging ring is provided above the end cover 3. The hanging ring is connected to a hoist on the ground by a hoisting rope. The hoist is a winch.

[0030] like Figure 4As shown, in order to sample groundwater, a second inlet hole 35 is provided on the end cap 3. A plugging column 4 can be sealed and inserted into the second inlet hole 35. Both the second inlet hole 35 and the plugging column 4 are designed as inverted frustum structures. A sealing layer and a support plate 41 are provided on the plugging column 4. A motor 33 (with waterproof function) is connected to the bottom of the end cap 3 via a connecting rod 32. Specifically, a third thread is provided below the connecting rod 32. Two nuts are threaded on the upper and lower threads of the third thread, and the two nuts are distributed on the upper and lower sides of the ear plate of the motor 33. A threaded column 34 is provided on the output shaft of the motor 33. The upper thread of the threaded column 34 is inserted into the threaded groove of the plugging column 4. The end of the support plate 41 is sleeved on the connecting rod 32. Therefore, the plugging column 4 can be controlled to rise and fall stably under the action of the motor 33. Once the sampling box descends to a certain depth, motor 33 drives the threaded column 34 to rotate, which in turn controls the descent of the blocking column 4, clearing the second inlet hole 35. At this point, groundwater at that depth flows into the sampling box through the second inlet hole 35. After sampling is completed, motor 33 rotates in the opposite direction, forcing the blocking column 4 to rise and insert into the second inlet hole 35, sealing the second inlet hole 35 through the sealing layer. Finally, the sampling box is lifted up by a hoist.

[0031] Example 2

[0032] like Figure 1 , Figure 2 , Figure 3As shown, an underground sampling and testing device for oil reservoir logging geological exploration includes a box body 1, an end cap 3, and a counterweight 11. The box body 1 and the end cap 3 form a sampling box. The lower end of the box body 1 is designed as a frustum, and an output pipe 14 is provided at the lower position. The output pipe 14 can seal a threaded connection plug or a threaded connection collection bottle 2. A first internally threaded pipe 13 is also provided below the box body 1. A counterweight 11 is provided below the first internally threaded pipe 13. A screw is provided on the counterweight 11, and the screw thread is inserted into the first internally threaded pipe 13. Under the action of the counterweight 11, the center of gravity of the device is lowered, and the gravity of the sampling box is increased, so that the device can rise and fall stably in underground liquid. The upper end of the box body 1 is open, and an annular baffle 12 and a first thread are provided on the inner side of the box body 1. The first thread is located above the annular baffle 12. At the same time, a second thread is provided on the end cover 3, which is adapted to the first thread. Therefore, the end cover 3 is threadedly connected to the box body 1. The lower end of the end cover 3 contacts the annular baffle 12. A sealing gasket is provided at the contact point between the annular baffle 12 and the end cover 3, so as to achieve a sealed and detachable connection between the end cover 3 and the box body 1. In addition, in order to restrict the rotation of the end cover 3 relative to the box body 1, a threaded hole 31 is provided on the edge of the end cover 3. A bolt is threaded through the threaded hole 31. The lower end of the bolt presses against the sealing gasket and the annular baffle 12, increasing the resistance to the rotation of the end cover 3 relative to the box body 1, and effectively controlling the end cover 3 and the box body 1 to remain relatively stationary. In order to facilitate the control of the device's lifting and lowering in the well, a hanging ring is provided above the end cover 3. The hanging ring is connected to a hoist on the ground by a hoisting rope. The hoist is a winch.

[0033] like Figure 5 As shown, in order to sample groundwater, a second inlet hole 35 is provided on the end cap 3. A limiting groove 36 is provided on the side wall of the second inlet hole 35, and a second internally threaded tube 51 is provided through it. A wing plate is provided on the second internally threaded tube 51, and the end of the wing plate extends into the limiting groove 36. A sealing cap 5 is fixedly provided on the upper end of the second internally threaded tube 51. A sealing gasket is provided on the lower end face of the sealing cap 5. A motor 33 (with waterproof function) is connected to the lower end of the end cap 3 through a connecting rod 32. Specifically, a third thread is provided on the lower end of the connecting rod 32. Two nuts are threaded on the upper and lower ends of the third thread, and the two nuts are distributed on the upper and lower sides of the ear plate of the motor 33. A threaded post 34 is provided on the output shaft of the motor 33, and the upper end of the threaded post 34 is threaded into the second internally threaded tube 51. Once the sampling box descends to a certain depth, the motor 33 drives the threaded column 34 to rotate, which in turn controls the second internal threaded tube 51 to raise the sealing cover 5, thus opening the second inlet hole 35. At this point, groundwater at that depth flows into the sampling box through the second inlet hole 35. After sampling is completed, the motor 33 rotates in the opposite direction, forcing the sealing cover 5 to descend and completely cover the second inlet hole 35, sealing it through the sealing layer. Finally, the sampling box is raised by a hoist.

[0034] Example 3

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, an underground sampling and testing device for oil reservoir logging geological exploration includes a box body 1, an end cap 3, and a counterweight 11. The box body 1 and the end cap 3 form a sampling box. The lower end of the box body 1 is designed as a frustum, and an output pipe 14 is provided at the lower position. The output pipe 14 can seal a threaded connection plug or a threaded connection collection bottle 2. A first internally threaded pipe 13 is also provided below the box body 1. The counterweight 11 is provided below the first internally threaded pipe 13. A screw is provided on the counterweight 11, and the screw thread is inserted into the first internally threaded pipe 13. Under the action of the counterweight 11, the center of gravity of the device is lowered, and the gravity of the sampling box is increased, so that the device can rise and fall stably in underground liquid. The upper end of the box body 1 is open, and an annular baffle 12 and a first thread are provided on the inner side of the box body 1. The first thread is located above the annular baffle 12. At the same time, a second thread is provided on the end cover 3, which is adapted to the first thread. Therefore, the end cover 3 is threadedly connected to the box body 1. The lower end of the end cover 3 contacts the annular baffle 12. A sealing gasket is provided at the contact point between the annular baffle 12 and the end cover 3, so as to achieve a sealed and detachable connection between the end cover 3 and the box body 1. In addition, in order to restrict the rotation of the end cover 3 relative to the box body 1, a threaded hole 31 is provided on the edge of the end cover 3. A bolt is threaded through the threaded hole 31. The lower end of the bolt presses against the sealing gasket and the annular baffle 12, increasing the resistance to the rotation of the end cover 3 relative to the box body 1, and effectively controlling the end cover 3 and the box body 1 to remain relatively stationary. In order to facilitate the control of the device's lifting and lowering in the well, a hanging ring is provided above the end cover 3. The hanging ring is connected to a hoist on the ground by a hoisting rope. The hoist is a winch.

[0036] like Figure 6 , Figure 7 , Figure 8As shown, in order to complete the sampling of groundwater at different depths in one go, multiple partition plates 16 are arranged on the upper and lower sides of the inner side of the box 1. The multiple partition plates 16 divide the space formed by the box 1 and the end cover 3 into multiple independent spaces. A first liquid inlet hole 15 is provided at the upper end of the side wall of each independent space. A blocker 6 is provided on the outer side of the box 1. The blocker 6 includes a blocker plate 61, a motor 33 and two annular connecting plates 62. The two annular connecting plates 62 are respectively fixed at the upper and lower ends of the blocker plate 61 and are connected to the box 1 by bearings. A toothed groove 64 is provided on the blocker plate 61. A gear 65 is meshed on the side of the toothed groove 64. The gear 65 is connected to the motor 33 (which has a waterproof function). The motor 33 is installed on the end cover 3. Multiple third liquid inlets 63 are provided on the blocker plate 61. The line connecting the multiple third liquid inlets 63 is inclined relative to the height direction of the sampling box. The blocker plate 61 is set in close contact with the box 1, and a sealing layer is provided at the gap. When the sampling box reaches the first depth position, the motor 33 controls the gear 65 to drive the annular connecting plate 62 to rotate, which in turn drives the blocking plate 61 to rotate, so that the uppermost or lowermost first inlet hole 15 is aligned with the third inlet hole 63. At this time, the groundwater at this depth flows into the independent space of its corresponding sampling box. After the groundwater sampling at this depth is completed, the motor 33 rotates at least one inlet hole diameter away in the original direction to block the inlet hole and cut off the flow of groundwater. When the sampling box descends to the second depth position, the motor 33 continues to rotate in the original direction, so that another first inlet hole 15 is aligned with the third inlet hole 63. At this time, the groundwater at this depth flows into the independent space of its corresponding sampling box. After the groundwater sampling at this depth is completed, the motor 33 rotates at least one inlet hole diameter away in the original direction to block the inlet hole and cut off the flow of groundwater. By repeating the above steps, groundwater sampling at different depths can be completed in one descent of the sampling box, improving sampling efficiency.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ground sampling and testing device for oil reservoir logging geological exploration, characterized in that, The sampling box includes a box body (1) and an end cap (3). The upper end of the box body (1) is set as an opening, and the end cap (3) is sealed at the opening of the box body (1). The sampling box is provided with a liquid inlet hole, and a blocking mechanism is provided at the liquid inlet hole. The blocking mechanism can adjust the patency of the liquid inlet hole.

2. The underground sampling and testing device for oil reservoir logging geological exploration according to claim 1, characterized in that, The lower end of the box (1) is configured as a frustum structure, and an output pipe (14) is provided at the lower position. An annular baffle (12) and a first thread are provided on the inner side of the box (1), and the first thread is located above the annular baffle (12).

3. The underground sampling and testing device for reservoir logging geological exploration according to claim 2, characterized in that, The end cap (3) is provided with a hanging ring on the top and a threaded hole (31) on the edge. A bolt is threaded through the threaded hole (31). A second thread is provided on the end cap (3) and is threadedly connected to the box body (1). The lower end of the end cap (3) is in contact with the annular baffle (12). The lower end of the bolt is pressed against the annular baffle (12).

4. The underground sampling and testing device for reservoir logging geological exploration according to claim 3, characterized in that, The end cap (3) is provided with a second liquid inlet hole (35), and a blocking mechanism can be sealed and inserted into the second liquid inlet hole (35). The blocking mechanism is configured as a blocking column (4). A motor (33) is connected to the end cap (3) via a connecting rod (32). A threaded column (34) is provided on the output shaft of the motor (33). The upper end of the threaded column (34) is threaded into the threaded groove of the blocking column (4).

5. The underground sampling and testing device for oil reservoir logging geological exploration according to claim 4, characterized in that, The second inlet hole (35) and the plugging column (4) are both configured as inverted frustum structures. A sealing layer and a support plate (41) are provided on the plugging column (4). The end of the support plate (41) is sleeved on the connecting rod (32).

6. The underground sampling and testing device for oil reservoir logging geological exploration according to claim 3, characterized in that, The end cap (3) is provided with a second liquid inlet hole (35). The side wall of the second liquid inlet hole (35) is provided with a limiting groove (36), and a second internal threaded tube (51) is provided through it. The wing plate of the second internal threaded tube (51) extends into the limiting groove (36), and a blocking mechanism is fixedly provided at the upper end. The blocking mechanism is a sealing cover (5). A motor (33) is connected to the bottom of the end cap (3) through a connecting rod (32). A threaded post (34) is provided on the output shaft of the motor (33). The upper end of the threaded post (34) is threaded into the second internal threaded tube (51).

7. The underground sampling and testing device for oil reservoir logging geological exploration according to claim 3, characterized in that, The inner side of the box (1) is provided with multiple partition plates (16) and multiple first liquid inlet holes (15) are provided on the side wall. The first liquid inlet holes (15) are located in the gap between adjacent partition plates (16). A blocking mechanism is provided on the outer side of the box (1). The blocking mechanism is a blocker (6).

8. The underground sampling and testing device for oil reservoir logging geological exploration according to claim 7, characterized in that, The blocker (6) includes a blocker plate (61), a motor (33), and two annular connecting plates (62). The two annular connecting plates (62) are respectively fixed at the upper and lower ends of the blocker plate (61) and sleeved on the box body (1). The blocker plate (61) is provided with toothed grooves (64), and gears (65) are meshed on the side of the toothed grooves (64). The gears (65) are connected to the motor (33), and the motor (33) is mounted on the end cover (3). The blocker plate (61) is provided with multiple third liquid inlet holes (63), which are staggered and can be aligned with the first liquid inlet hole (15) one by one.

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