Rubber sleeve type sampling probe for real-time detection of stratum oil gas

Abstract

The utility model relates to the technical field of oil-gas exploration and exploitation, in particular to a rubber cylinder type sampling probe for real-time detection of stratum oil gas, which comprises an inner cylinder, support sleeves are arranged at two ends of the inner cylinder, an outer cylinder can descend along with a detection guide pipe so as to stop at any time and extract petroleum through an oil suction hole and a hose for detection, sampling is more convenient and faster, and sampling efficiency is improved. The outer cylinder can be fixed through expansion of the connecting seat, so that sampling is more stable, impact is buffered through contraction of the two springs and rising of the movable inner sleeve and the movable sleeve, reaction time is reserved for stopping of the detection guide pipe, the probability that the petroleum probe is damaged is effectively reduced, and the petroleum probe is longer in service life and higher in practicability. In addition, the expanded connecting seat can not only fit, support and protect the well wall and effectively prevent the well wall from falling off due to oil extraction, but also has elasticity and is not easy to break down, the disturbance of oil extraction through the fine oil suction holes to the oil is smaller, and sampling is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas exploration and development technology, and in particular to a rubber tube-type sampling probe for real-time detection of formation oil and gas. Background Technology

[0002] Before oil extraction, it is necessary to estimate the oil well yield to predict economic benefits. The oil well yield refers to the ratio of crude oil extracted from the underground reservoir to the total underground reserves during oil extraction. It is an important indicator for evaluating the development effect and economic benefits of an oil field. Fluid properties determine the calculation of reserves and subsequent well location, especially in non-hydrocarbon reservoirs. To understand the reservoir fluid properties and reservoir physical properties, the conventional practice in the field is to perform pressure testing and sampling of the reservoir. However, directly extracting oil through ordinary conduits is problematic. Excessively long conduits are prone to significant shaking at the lower end due to the accumulation of small deformations, which can easily damage the wellbore and affect the stability of the sampling. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the tendency to damage well walls and affect the stability of sampling, by proposing a rubber-tube sampling probe for real-time detection of formation oil and gas.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Design a cartridge-type sampling probe for real-time detection of formation oil and gas, comprising an inner cylinder with support sleeves at both ends. A pair of support sleeves are connected to a movable outer sleeve and a fixed outer sleeve respectively via a buffer structure. Both the movable and fixed outer sleeves have several communicating holes on their outer walls. An outer cylinder is fixedly mounted on the outer wall of the inner cylinder. A groove is provided on the outer wall of the outer cylinder, and several connecting seats are fixedly mounted within the groove. Each connecting seat has a gas chamber and an oil suction chamber. Several rigid connecting pipes are fixedly mounted at both ends of the outer cylinder, and the outer ends of the rigid connecting pipes are fixedly connected to the fixed outer sleeve via rigid pipes. The outer sleeve is connected to the connecting holes on the fixed outer sleeve and the moving outer sleeve respectively. The inner ends of several rigid connecting pipes are inserted into the connecting seat and connected to the air chamber. The upper end of the outer cylinder is fixedly provided with a flexible connecting pipe, and the inner end of the flexible connecting pipe is fixedly inserted into the connecting seat by a nut and connected to the oil suction chamber. The upper end of the flexible connecting pipe is fixedly connected to the fixed outer sleeve by a flexible hose, and the upper end of the flexible hose is fixedly connected to the fixed outer sleeve by a flexible hose connector and connected to the connecting hole on the fixed outer sleeve. The outer wall of the connecting seat is provided with an oil suction hole that connects to the oil suction chamber. The outer wall of the connecting seat is fixedly provided with a filter device for filtering oil.

[0006] Preferably, the inner cylinder includes an outer locking sleeve, a support sleeve, and an inner cylinder body. The outer cylinder is fixed to the outer wall of the inner cylinder body, and the outer locking sleeves are fixed to both ends of the inner cylinder body. The outer locking sleeves are fixedly connected to both ends of the outer wall of the inner cylinder body by screws, and the outer cylinder is clamped and fixed between the two outer locking sleeves.

[0007] Preferably, the inner cylinder body has irregularly shaped annular grooves at both ends, and an outer locking sleeve is engaged in the irregularly shaped annular grooves.

[0008] Preferably, the buffer structure includes a movable inner sleeve, a movable sleeve, and a spring. The movable sleeve is fixedly connected to the support sleeves at both ends of the inner cylinder. The movable inner sleeve is fixedly provided on the inner wall of the movable sleeve, and the end of the movable inner sleeve near the inner cylinder abuts against the movable sleeve and the support sleeve. An interlayer is provided between the movable inner sleeve and the movable sleeve, and a spring sleeved on the movable inner sleeve is provided in the interlayer. The inner and outer ends of the spring abut against the movable inner sleeve located on the inner side and the movable outer sleeve and the fixed outer sleeve located on the outer side, respectively. An annular groove is opened at the end of the movable outer sleeve and the fixed outer sleeve near each other, and the movable sleeve is inserted into the annular groove.

[0009] Preferably, the rigid pipe includes an outer pipe A and several outer pipes B with the same inner diameter. Several outer pipes B are provided on the side of the rigid pipe connecting pipe away from the outer cylinder, and an outer pipe A is provided at the end of the several outer pipes B away from the outer cylinder. The ends of the outer pipes A at the upper and lower ends away from the outer cylinder are respectively fixedly connected to a fixed outer sleeve and a fixed outer sleeve. The ends of the outer pipe A, the several outer pipes B, and the rigid pipe connecting pipe close to each other are all hinged and rotatably connected by a hinge structure.

[0010] Preferably, the hinge structure includes a connecting pipe, a pair of connecting sleeves, and a pair of adapter sleeves. The end of the outer pipe A near the outer cylinder, both ends of the plurality of outer pipes B, and the end of the rigid connecting pipe away from the outer cylinder are all spherical ends, and the outer wall of the spherical end is fitted with an adapter sleeve. A connecting pipe is fixed between two adjacent adapter sleeves through a connecting structure. The interior of the adapter sleeve and the connecting pipe is provided with a through hole with a diameter larger than the inner diameter of the outer pipe B.

[0011] Preferably, the connection structure includes a pair of connecting sleeves, with connecting sleeves fixed to the outer walls of both ends of the connecting tube, and two adapter sleeves inserted into the interior of the pair of connecting sleeves, with the ends of the two adapter sleeves away from each other abutting against the connecting sleeves respectively.

[0012] Preferably, the filtering device includes an outer filter screen and an inner filter screen. The outer wall of the connecting seat is fixedly provided with an inner filter screen for blocking the oil suction hole, and the inner filter screen is located outside the oil suction hole. The outer filter screen is fixedly provided with an outer filter screen by screws, and the outer filter screen is located outside the inner filter screen.

[0013] Preferably, the outer wall of the outer filter screen has several horizontally penetrating through holes, and the outer wall of the inner filter screen has several rows of micro-holes penetrating through holes, with each row of micro-holes aligned with the horizontally penetrating through holes.

[0014] Preferably, the upper end of the fixed outer sleeve is fixed with an adapter for connecting the probe tube.

[0015] This invention proposes a rubber-tube sampling probe for real-time formation oil and gas detection. Its advantages include: the outer cylinder descends with the probe guide, allowing for immediate stopping and extraction of oil through the suction port and hose for testing, making sampling more convenient and faster. The expansion of the connecting seat secures the outer cylinder, ensuring more stable sampling. The contraction of two springs and the rise of the movable inner and outer sleeves buffer impacts and allow reaction time for the probe guide to stop, effectively reducing the possibility of damage to the oil probe and extending its service life. Furthermore, the expanding connecting seat not only provides close support and protection to the well wall, effectively preventing it from detaching during oil extraction, but also has elasticity, making it less prone to failure. Extracting oil through the small suction port causes less disturbance to the oil, resulting in more accurate sampling. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of a cartridge-type sampling probe for real-time detection of formation oil and gas proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of a rubber-tube sampling probe for real-time detection of formation oil and gas proposed in this utility model.

[0018] Figure 3 This is a cross-sectional diagram of the outer cylinder of a rubber-tube sampling probe for real-time detection of formation oil and gas proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the outer cylinder structure of a rubber-tube sampling probe for real-time detection of formation oil and gas proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the rigid tube structure of a rubber-tube type sampling probe for real-time detection of formation oil and gas proposed in this utility model.

[0021] In the diagram: 1. Moving outer sleeve; 2. Moving inner sleeve; 3. Moving sleeve; 4. Inner cylinder; 5. Outer filter screen; 6. Air chamber; 7. Outer cylinder; 8. Rigid pipe connecting pipe; 9. Rigid pipe; 10. Fixed outer sleeve; 11. Adapter; 12. Hose; 13. Hose connecting pipe; 14. Nut; 15. Oil suction chamber; 16. Connecting seat; 17. Support sleeve; 18. Spring; 19. Connecting hole; 20. Inner filter screen; 21. Outer locking sleeve; 22. Inner cylinder body; 23. Oil suction hole; 25. Outer pipe A; 26. Adapter sleeve; 27. Connecting pipe; 28. Connecting sleeve; 29. ​​Outer pipe B. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5 A cartridge-type sampling probe for real-time detection of formation oil and gas includes an inner cylinder 4. Support sleeves 17 are provided at both ends of the inner cylinder 4, and a pair of support sleeves 17 are respectively connected to a movable outer sleeve 1 and a fixed outer sleeve 10 via a buffer structure. Several connecting holes 19 are provided on the outer walls of both the movable and fixed outer sleeves 1 and 10. An outer cylinder 7 is fixedly mounted on the outer wall of the inner cylinder 4. A groove is provided on the outer wall of the outer cylinder 7, and several connecting seats 16 are fixedly mounted within the groove. Gas chambers 6 and oil suction chambers 15 are respectively provided within the connecting seats 16. Several rigid connecting pipes 8 are fixedly mounted at both ends of the outer cylinder 7, and the outer ends of the rigid connecting pipes 8 are fixedly connected to the fixed outer sleeve 10 and the movable outer sleeve 1 via rigid pipes 9. The connecting holes 19 on the fixed outer sleeve 10 and the movable outer sleeve 1 allow the inner ends of several rigid connecting pipes 8 to be inserted into the connecting seat 16 and connected to the air chamber 6. The upper end of the outer cylinder 7 is fixedly provided with a flexible connecting pipe 13, and the inner end of the flexible connecting pipe 13 is fixedly inserted into the connecting seat 16 by a nut 14 and connected to the oil suction chamber 15. The upper end of the flexible connecting pipe 13 is fixedly connected to the fixed outer sleeve 10 by a flexible hose 12, and the upper end of the flexible hose 12 is fixedly connected to the fixed outer sleeve 10 by a flexible hose connector and connected to the connecting hole 19 on the fixed outer sleeve 10. An oil suction hole 23 connected to the oil suction chamber 15 is opened on the outer wall of the connecting seat 16, and a filter device for filtering oil is fixedly provided on the outer wall of the connecting seat 16.

[0024] The inner cylinder includes an outer locking sleeve 21, a support sleeve 17, and an inner cylinder body 22. An outer cylinder 7 is fixed to the outer wall of the inner cylinder body 22. The two ends of the inner cylinder body 22 are fixed with outer locking sleeves 21. The outer walls of the two ends of the inner cylinder body 22 are fixedly connected to the outer locking sleeves 21 by screws, and the outer cylinder 7 is clamped and fixed between the two outer locking sleeves 21.

[0025] The inner cylinder body 22 has irregularly shaped annular grooves at both ends, and the outer locking sleeve 21 is engaged in the irregularly shaped annular grooves.

[0026] The buffer structure includes a movable inner sleeve 2, a movable sleeve 3, and a spring 18. The movable sleeve 3 is fixedly connected to the support sleeves 17 at both ends of the inner cylinder 4. The movable inner sleeve 2 is fixedly installed on the inner wall of the movable sleeve 3, and the end of the movable inner sleeve 2 near the inner cylinder 4 abuts against the movable sleeve 3 and the support sleeve 17. There is an interlayer between the movable inner sleeve 2 and the movable sleeve 3, and the spring 18 is sleeved on the movable inner sleeve 2 in the interlayer. The inner and outer ends of the spring 18 abut against the movable inner sleeve 2 located on the inner side and the movable outer sleeve 1 and the fixed outer sleeve 10 located on the outer side, respectively. The movable outer sleeve 1 and the fixed outer sleeve 10 have an annular groove at their ends close to each other, and the movable sleeve 3 is inserted into the annular groove.

[0027] The rigid pipe 9 includes an outer pipe A25 with the same inner diameter and several outer pipes B 29. Several outer pipes B 29 are provided on the side of the rigid pipe connecting pipe 8 away from the outer cylinder 7, and an outer pipe A25 is provided at the end of the several outer pipes B 29 away from the outer cylinder 7. The ends of the outer pipes A25 at the upper and lower ends away from the outer cylinder 7 are respectively fixedly connected to the fixed outer sleeve 10. The outer pipe A25, several outer pipes B 29 and the rigid pipe connecting pipe 8 are all hinged at the ends close to each other through a hinge structure for rotational connection.

[0028] The hinged structure includes a connecting pipe 27, a pair of connecting sleeves 28, and a pair of adapter sleeves 26. The end of the outer pipe A25 near the outer cylinder 7, the two ends of several outer pipes B 29, and the end of the rigid connecting pipe 8 away from the outer cylinder 7 are all spherical ends, and the outer wall of the spherical end is fitted with an adapter sleeve 26. The connecting pipe 27 is fixed between two adjacent adapter sleeves 26 through a connecting structure. The interior of the adapter sleeve 26 and the connecting pipe 27 are both provided with through holes with a diameter larger than the inner diameter of the outer pipes B.

[0029] The connection structure includes a pair of connecting sleeves 28. The outer walls of both ends of the connecting tube 27 are respectively fixed with connecting sleeves 28. Two adapter sleeves 26 are respectively inserted into the inside of the pair of connecting sleeves 28, and the ends of the two adapter sleeves 26 that are away from each other abut against the connecting sleeves 28.

[0030] The filter device includes an outer filter screen 5 and an inner filter screen 20. The outer wall of the connecting seat 16 is fixed with an inner filter screen 20 for blocking the oil suction hole 23, and the inner filter screen 20 is located outside the oil suction hole 23. The outer wall of the connecting seat 16 is fixed with an outer filter screen 5 by screws, and the outer filter screen 5 is located outside the inner filter screen 20.

[0031] The outer filter screen 5 has several horizontally penetrating through holes on its outer wall, and the inner filter screen 20 has several rows of micro-holes penetrating through holes on its outer wall, with each row of micro-holes aligned with the horizontal through holes.

[0032] An adapter 11 for connecting the probe tube is fixed to the upper end of the outer sleeve 10.

[0033] Working principle: The probe is installed on the outside of the oil detection guide tube and lowered into the drilled well. When it reaches the set position, gas is injected into the gas chamber 6 through the rigid pipe 9 and the rigid pipe connecting pipe 8, causing the connecting seat 16 with the gas chamber 6 to expand and deform and abut against the borehole wall, thus fixing the outer cylinder 7. Oil filtered by the inner filter screen 20 and the outer filter screen 5 is sucked into the oil suction chamber 15 through the oil suction hole 23, and then transported to the surface for detection through the hose 12 and the hose connecting pipe 13. During the drilling descent, when the moving outer sleeve 1 encounters an obstacle or impact, the impact is buffered by the contraction of the two springs 18 and the rise of the moving inner sleeve 2 and the moving sleeve 3, and the reaction time is allowed for the detection guide tube to stop, effectively reducing the possibility of damage to the oil probe. The outer cylinder 7 and the moving outer sleeve 1 and the fixed outer sleeve 10 are connected by the rigid pipe 9, which effectively prevents it from detaching.

[0034] The outer cylinder 7 can be stopped at any time as the probe descends, and oil can be extracted through the suction hole 23 and hose 12 for testing, making sampling more convenient and faster. The expansion of the connecting seat 16 can fix the outer cylinder 7, making sampling more stable. The contraction of the two springs 18 and the rise of the movable inner sleeve 2 and movable sleeve 3 can buffer the impact and allow reaction time for the probe to stop, effectively reducing the possibility of damage to the oil probe and extending its service life. In addition, the expanded connecting seat 16 can not only fit and support the well wall to protect it, effectively preventing the well wall from falling off due to oil extraction, but also has elasticity and is less prone to failure. The oil extraction through the small suction hole 23 causes less disturbance to the oil, making the sampling more accurate.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cartridge-type sampling probe for real-time detection of formation oil and gas, comprising an inner cylinder (4), characterized in that, The inner cylinder (4) has support sleeves (17) at both ends, and a pair of support sleeves (17) are connected to the moving outer sleeve (1) and the fixed outer sleeve (10) respectively through a buffer structure. The outer walls of the moving outer sleeve (1) and the fixed outer sleeve (10) are provided with several connecting holes (19). The outer wall of the inner cylinder (4) is fixedly provided with an outer cylinder (7). The outer wall of the outer cylinder (7) is provided with a groove, and several connecting seats (16) are fixedly provided in the groove. The several connecting seats (16) are respectively provided with an air chamber (6) and an oil suction chamber (15). The two ends of the outer cylinder (7) are fixedly provided with several hard pipe connecting pipes (8), and the outer ends of the hard pipe connecting pipes (8) are fixedly connected to the fixed outer sleeve (10) and the moving outer sleeve (1) through hard pipes (9) and are respectively connected to the fixed outer sleeve (10) and the moving outer sleeve (1). 1) The inner end of several rigid connecting pipes (8) is inserted into the connecting seat (16) and connected to the air chamber (6). The upper end of the outer cylinder (7) is fixedly provided with a flexible connecting pipe (13), and the inner end of the flexible connecting pipe (13) is fixedly inserted into the connecting seat (16) by a nut (14) and connected to the oil suction chamber (15). The upper end of the flexible connecting pipe (13) is fixedly connected to the fixed outer sleeve (10) by a flexible hose (12), and the upper end of the flexible hose (12) is fixedly connected to the fixed outer sleeve (10) by a flexible hose connector and connected to the connecting hole (19) on the fixed outer sleeve (10). The outer wall of the connecting seat (16) is provided with an oil suction hole (23) that connects to the oil suction chamber (15). The outer wall of the connecting seat (16) is fixedly provided with a filter device for filtering oil.

2. The cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 1, characterized in that, The inner cylinder includes an outer locking sleeve (21), a support sleeve (17), and an inner cylinder body (22). An outer cylinder (7) is fixed to the outer wall of the inner cylinder body (22). The two ends of the inner cylinder body (22) are fixed with outer locking sleeves (21). The outer walls of the two ends of the inner cylinder body (22) are fixedly connected to the outer locking sleeves (21) by screws, and the outer cylinder (7) is clamped and fixed between the two outer locking sleeves (21).

3. The cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 2, characterized in that, The inner cylinder body (22) has irregularly shaped annular grooves at both ends, and an outer locking sleeve (21) is engaged in the irregularly shaped annular grooves.

4. The cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 1, characterized in that, The buffer structure includes a movable inner sleeve (2), a movable sleeve (3), and a spring (18). The movable sleeve (3) is fixedly connected to the support sleeve (17) at both ends of the inner cylinder (4). The movable inner sleeve (2) is fixedly provided on the inner wall of the movable sleeve (3). The end of the movable inner sleeve (2) near the inner cylinder (4) abuts against the movable sleeve (3) and the support sleeve (17). There is an interlayer between the movable inner sleeve (2) and the movable sleeve (3), and the spring (18) is sleeved on the movable inner sleeve (2) in the interlayer. The inner and outer ends of the spring (18) abut against the movable inner sleeve (2) located on the inner side and the movable outer sleeve (1) and the fixed outer sleeve (10) located on the outer side, respectively. The movable outer sleeve (1) and the fixed outer sleeve (10) have an annular groove at their ends close to each other, and the movable sleeve (3) is inserted into the annular groove.

5. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 1, characterized in that, The rigid pipe (9) includes an outer pipe A (25) and several outer pipes B (29) with the same inner diameter. Several outer pipes B (29) are provided on the side of the rigid pipe connecting pipe (8) away from the outer cylinder (7), and the outer pipe A (25) is provided at the end of the several outer pipes B (29) away from the outer cylinder (7). The ends of the outer pipes A (25) at the upper and lower ends away from the outer cylinder (7) are respectively fixedly connected to the fixed outer sleeve (10) and the fixed outer sleeve (10). The ends of the outer pipe A (25), the several outer pipes B (29) and the rigid pipe connecting pipe (8) that are close to each other are all hinged and rotatably connected by a hinge structure.

6. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 5, characterized in that, The hinge structure includes a connecting pipe (27), a pair of connecting sleeves (28), and a pair of adapter sleeves (26). The end of the outer pipe A (25) near the outer cylinder (7), the two ends of the plurality of outer pipes B (29), and the end of the rigid pipe connecting pipe (8) away from the outer cylinder (7) are all spherical ends, and the outer wall of the spherical end is fitted with an adapter sleeve (26). The connecting pipe (27) is fixed between two adjacent adapter sleeves (26) through a connecting structure. The interior of the adapter sleeve (26) and the connecting pipe (27) are both provided with through holes with a diameter larger than the inner diameter of the outer pipe B.

7. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 6, characterized in that, The connection structure includes a pair of connecting sleeves (28), and the outer walls of both ends of the connecting tube (27) are respectively fixed with connecting sleeves (28). Two adapter sleeves (26) are respectively inserted into the inside of the pair of connecting sleeves (28), and the ends of the two adapter sleeves (26) away from each other abut against the connecting sleeves (28).

8. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 1, characterized in that, The filtering device includes an outer filter screen (5) and an inner filter screen (20). The outer wall of the connecting seat (16) is fixed with an inner filter screen (20) for blocking the oil suction hole (23), and the inner filter screen (20) is located outside the oil suction hole (23). The outer wall of the connecting seat (16) is fixed with an outer filter screen (5) by screws, and the outer filter screen (5) is located outside the inner filter screen (20).

9. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 8, characterized in that, The outer filter screen (5) has several horizontally penetrating through holes on its outer wall, and the inner filter screen (20) has several rows of micro-holes penetrating through its outer wall, with each row of micro-holes aligned with the horizontally penetrating through holes.

10. A cartridge-type sampling probe for real-time detection of formation oil and gas according to claim 1, characterized in that, The upper end of the fixed outer sleeve (10) is fixed with an adapter (11) for connecting the probe tube.

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