A downhole sampling device for oil production

Abstract

The present invention discloses a downhole sampling device for oil production, including a protective shell, a bottom plate and an oil pump, wherein a protective shell is fixedly installed on the top of the bottom plate, a protective box is movably installed on the top of the protective shell between the limit blocks, a collecting bottle is movably installed inside the placing box, an oil guide pipe is movably installed inside the protective shell on the top of the collecting bottle, and a solenoid valve is fixedly installed on the periphery of the oil guide pipe, a fan is fixedly installed on the top of the partition, an air guide pipe is arranged between the fan and the collecting bottle, and a particle filter is movably installed inside the protective shell on the other side of the activated carbon filter. The present invention facilitates users to detect and compare the sampled oil by automatically dividing the oil into time periods and collecting and sampling separately, thereby reducing detection errors, being able to process oil and gas, improving the environmental protection effect and safety of the device, and facilitating users to carry and protect power supply equipment or other auxiliary structures, thereby improving the practicality of the device.

Description

Technical Field

[0001] The invention relates to the technical field of oil production, in particular to a downhole sampling device used for oil production. Background Art

[0002] Oil extraction refers to the act of digging and extracting oil from places where oil is stored. In the process of oil extraction, oil and gas flow from the reservoir to the bottom of the well, and then rise from the bottom of the well to the wellhead. Oil is a fluid mineral buried deep underground. Initially, people called the oily liquid minerals produced in nature oil, the combustible gas natural gas, and the solid combustible oil mineral asphalt. With the in-depth study of these minerals, it is realized that they are all hydrocarbon compounds in composition and are related to each other in genesis. Therefore, they are collectively referred to as oil. When conducting oil extraction, oil testing is required regularly to detect the quality of the oil. Before testing the oil, a small amount of oil needs to be taken out of the oil well. When sampling oil, a sampling device is required. For this reason, we propose an oil drilling and cementing cement slurry mixing device.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art that have not been solved:

[0004] 1. The existing downhole sampling device for oil extraction does not have an automatic timed sampling structure and has only one collection structure. Users need to pump oil by themselves and only pump the oil into one collection structure, which is not convenient for users to test and compare oil at different times, which may easily lead to large errors in the test results.

[0005] 2. The existing downhole sampling device for oil extraction does not have an oil and gas processing structure, and it is easy to draw in a lot of oil and gas when pumping oil, which can easily cause oil and gas poisoning to the user during the test, so the safety of the device is not ideal;

[0006] 3. The existing downhole sampling device for oil extraction does not have a protective mechanism for power supply equipment or other auxiliary structures, which is inconvenient for users to carry and store power supply equipment or other auxiliary structures. Therefore, we propose a downhole sampling device for oil extraction to solve the existing problems. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings existing in the prior art, such as: the downhole sampling device used for oil extraction does not have an automatic timed sampling structure, which is not convenient for users to detect and compare oil at different times, which may easily lead to large errors in the detection results, and the oil and gas cannot be processed, which may easily lead to oil and gas poisoning of users during detection. Therefore, the safety of the device is not ideal, and there is no protection mechanism for power supply equipment or other auxiliary structures, which is not convenient for users to carry and store power supply equipment or other auxiliary structures.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A downhole sampling device for oil production, comprising a protective shell, a bottom plate and an oil pump, wherein wheels are fixedly mounted on the bottom of the bottom plate, and the number of wheels is four, a protective shell is fixedly mounted on the top of the bottom plate, a controller is fixedly mounted on the surface of the protective shell, limit blocks are fixedly mounted on both sides of the top of the protective shell, a protective box is movably mounted on the top of the protective shell between the limit blocks, movable blocks are fixedly mounted on the surfaces of both sides of the protective box, and the movable blocks overlap with the limit blocks, a thermal insulation layer is arranged inside the protective box, and a moisture-proof layer is arranged inside the thermal insulation layer;

[0010] A reel is fixedly installed on the surface of one side of the protective shell, an oil pump is fixedly installed inside the protective shell, an oil pumping pipe is arranged on the periphery of the reel on one side of the oil pump, an oil pumping head is fixedly installed on the bottom of the oil pumping pipe, a placement box is fixedly installed inside the protective shell on the other side of the oil pump, a collecting bottle is movably installed inside the placement box, and the number of collecting bottles is three, an oil guide pipe is movably installed inside the protective shell on the top of the collecting bottle, and a solenoid valve is fixedly installed on the periphery of the oil guide pipe;

[0011] A partition is fixedly installed inside the protective shell on the top of the oil guide pipe, a fan is fixedly installed on the top of the partition, an air guide pipe is arranged between the fan and the collecting bottle, and the air guide pipe is connected to three collecting bottles respectively, an activated carbon filter is movably installed inside the protective shell on the other side of the fan, and a particulate filter is movably installed inside the protective shell on the other side of the activated carbon filter.

[0012] Preferably, a protective door is movably mounted on the surface of the protective shell at the bottom of the controller, and a handle is fixedly mounted on the surface of the protective door.

[0013] Preferably, a fixing piece is fixedly installed between the controller and the protective shell, and a fixing bolt is movably installed between the fixing piece and the protective shell.

[0014] Preferably, a box door is movably mounted on the surface of the protection box, and a handle is fixedly mounted on the surface of the box door.

[0015] Preferably, a fixing block is fixedly installed on the top of the protection box, and a protective plate is fixedly installed on the top of the fixing block.

[0016] Preferably, an anti-sliding block is fixedly installed inside the limiting block on the periphery of the movable block, and the surface of the anti-sliding block is provided with anti-slip grooves.

[0017] Preferably, a maintenance door is movably installed on the surface of the protective shell on the other side of the controller, and bolts are movably installed between the maintenance door and the protective shell.

[0018] Preferably, a connecting piece is fixedly mounted on the surface of one side of the base plate, and a traction ring is fixedly mounted on the surface of one side of the connecting piece.

[0019] Preferably, a connecting block is fixedly installed on the surface of the other side of the protective shell, and a gripping rod is fixedly installed between the connecting blocks.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention has an oil guide pipe movably installed inside the protective shell on the top of the collecting bottle. The controller starts the oil pump to draw the oil inside the oil well into the oil guide pipe through the oil pumping head and the oil pumping pipe. At this time, the leftmost solenoid valve is opened, so that the oil is introduced into the leftmost collecting bottle through the oil guide pipe. When the oil pumping interval time set by the user is reached, the oil pump is started again by the controller to start drawing the oil into the oil guide pipe. At this time, the controller controls to open the middle solenoid valve, so that the oil is introduced into the middle collecting bottle through the oil guide pipe. When the oil pumping interval time set by the user is reached again, the oil pump is started for the last time by the controller to start drawing the oil into the oil guide pipe. At this time, the controller controls to open the rightmost solenoid valve, so that the oil is introduced into the rightmost collecting bottle through the oil guide pipe, thereby realizing automatic time division and separate collection and sampling of the oil, which is convenient for the user to detect and compare the sampled oil and reduces the detection error.

[0022] 2. The present invention provides an air duct between the fan and the collection bottle. When the user is performing oil sampling, the user can start the fan through the controller. The fan draws the oil and gas in the collection bottle into the interior of the protective shell through the air duct, and adsorbs and filters the harmful substances in the gas through the activated carbon filter, and filters the fine harmful particles in the gas through the particle filter, so that the gas discharged from the device is non-toxic and harmless, thereby improving the environmental protection effect of the device, and avoiding the situation where the interior of the collection bottle contains more oil and gas, which causes oil and gas poisoning to the user during detection, thereby improving the safety of the device.

[0023] 3. The present invention has a protection box movably installed on the top of the protection shell between the limit blocks. The user can place the power supply equipment or other auxiliary structures used by the device into the internal storage of the protection box. The protection box can protect the power supply equipment or other auxiliary structures to avoid damage caused by external impact. The insulation layer is made of rock wool material, which has the effect of heat insulation and cold insulation, and improves the insulation effect of the protection box. The moisture-proof layer is made of PVC waterproof and moisture-proof material, which can improve the waterproof and moisture-proof effect of the protection box and avoid the power supply equipment or other auxiliary structures from being damaged by the environmental temperature and humidity, thereby facilitating the user to carry and protect the power supply equipment or other auxiliary structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the partial structure of the protection box and the thermal insulation layer of the present invention;

[0028] Figure 5 It is a schematic diagram of the partial structure of the fan and the filter screen of the present invention;

[0029] Figure 6 It is a schematic diagram of the local structure of the limit block and the anti-sliding block of the present invention.

[0030] In the figure: 1, controller; 101, fixings; 2, protective shell; 3, oil extraction pipe; 4, reel; 5, oil extraction head; 6, traction ring; 601, connecting piece; 7, protective door; 701, handle; 8, wheel; 9, bottom plate; 10, connecting block; 1001, grip; 11, maintenance door; 12, movable block; 13, limit block; 1301, anti-sliding block; 14, protective plate; 1401, fixing block; 15, protection box; 1501, box door; 1502, handle; 16, thermal insulation layer; 17, moisture-proof layer; 18, oil extraction pump; 19, placement box; 20, collection bottle; 21, solenoid valve; 22, oil guide pipe; 23, partition; 24, air guide pipe; 25, fan; 26, activated carbon filter; 27, particulate filter. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] See also Figure 1-6The present invention proposes a downhole sampling device for oil production, comprising a protective shell 2, a bottom plate 9 and an oil pump 18, wherein a wheel 8 is fixedly installed at the bottom of the bottom plate 9, and the number of the wheels 8 is four, a protective shell 2 is fixedly installed at the top of the bottom plate 9, a controller 1 is fixedly installed on the surface of the protective shell 2, limited blocks 13 are fixedly installed on both sides of the top of the protective shell 2, a protective box 15 is movably installed on the top of the protective shell 2 between the limited blocks 13, movable blocks 12 are fixedly installed on the surfaces of both sides of the protective box 15, and the movable blocks 12 coincide with the limited blocks 13, a thermal insulation layer 16 is arranged inside the protective box 15, a moisture-proof layer 17 is arranged inside the thermal insulation layer 16, a retractor 4 is fixedly installed on the surface of one side of the protective shell 2, an oil pump 18 is fixedly installed inside the protective shell 2, and the retractor 4 on one side of the oil pump 18 is externally mounted. An oil extraction pipe 3 is arranged around the protective shell 2, an oil extraction head 5 is fixedly installed at the bottom of the oil extraction pipe 3, a placement box 19 is fixedly installed inside the protective shell 2 on the other side of the oil extraction pump 18, a collecting bottle 20 is movably installed inside the placement box 19, and the number of the collecting bottles 20 is three, an oil guide pipe 22 is movably installed inside the protective shell 2 at the top of the collecting bottle 20, and a solenoid valve 21 is fixedly installed on the periphery of the oil guide pipe 22, a partition 23 is fixedly installed inside the protective shell 2 at the top of the oil guide pipe 22, a fan 25 is fixedly installed on the top of the partition 23, an air guide pipe 24 is arranged between the fan 25 and the collecting bottle 20, and the air guide pipe 24 is connected to the three collecting bottles 20 respectively, an activated carbon filter 26 is movably installed inside the protective shell 2 on the other side of the fan 25, and a particle filter 27 is movably installed inside the protective shell 2 on the other side of the activated carbon filter 26.

[0036] It should be noted that: the contact area and friction between the bottom plate 9 and the ground are reduced by the wheels 8, and the user can move the device by pushing or pulling the device. The user moves the device to the vicinity of the wellhead to be mined, removes the oil pumping pipe 3 from the periphery of the reel 4, guides the oil pumping head 5 and the oil pumping pipe 3 into the interior of the oil well, and sets the oil pumping interval time for the controller 1. The controller 1 starts the oil pump 18 to pump the oil inside the oil well into the oil guide pipe 22 through the oil pumping head 5 and the oil pumping pipe 3. At this time, the leftmost solenoid valve 21 is opened, and the other two solenoid valves 21 are closed, so that the oil is guided into the leftmost collection bottle 20 through the oil guide pipe 22. When the oil pumping interval time set by the user is reached, the oil pumping is started again through the controller 1. The pump 18 starts to pump the oil into the oil pipe 22. At this time, the controller 1 controls to open the middle electromagnetic valve 21, and the other two electromagnetic valves 21 are closed, so that the oil is introduced into the middle collection bottle 20 through the oil pipe 22. When the oil pumping interval time set by the user arrives again, the oil pump 18 is started for the last time by the controller 1 to start pumping the oil into the oil pipe 22. At this time, the controller 1 controls to open the rightmost electromagnetic valve 21, and the other two electromagnetic valves 21 are closed, so that the oil is introduced into the rightmost collection bottle 20 through the oil pipe 22, so that the oil is automatically divided into time periods and collected and sampled separately, which is convenient for the user to detect and compare the sampled oil, reducing the detection error. The model of this controller 1 adopts KG316T type Timing controller, the model of this oil pump 18 adopts WCB-100 oil pump, the model of this solenoid valve 21 adopts XH-008 solenoid valve, and the model of this fan 25 adopts RB fan. When the user is performing oil sampling, the controller 1 starts the fan 25, and the fan 25 draws the oil and gas inside the collection bottle 20 into the inside of the protective shell 2 through the air guide pipe 24, and absorbs and filters the harmful substances inside the gas through the activated carbon filter 26, and filters the fine harmful particles in the gas through the particle filter 27, so that the gas discharged from the device is non-toxic and harmless gas, thereby improving the environmental protection effect of the device, and avoiding the situation that the inside of the collection bottle 20 contains more oil and gas, causing the user to be poisoned by oil and gas during detection. The protection box 15 can protect the power supply equipment or other auxiliary structures used by the device from being damaged by external impact. The thermal insulation layer 16 is made of rock wool and has the effects of heat insulation and cold insulation, which improves the thermal insulation effect of the protection box 15. The moisture-proof layer 17 is made of PVC waterproof and moisture-proof material, which can improve the waterproof and moisture-proof effect of the protection box 15 and prevent the power supply equipment or other auxiliary structures from being damaged by the environmental temperature and humidity, so that it is convenient for users to carry and protect the power supply equipment or other auxiliary structures. The user can separate the movable block 12 from the limit block 13 by pulling the protection box 15.The protective box 15 can be disassembled.

[0037] Embodiment 2

[0038] See also Figure 2-6 The present invention proposes a downhole sampling device for oil extraction. Compared with the first embodiment, the present embodiment further includes: a protective door 7 is movably installed on the surface of the protective shell 2 at the bottom of the controller 1, and a handle 701 is fixedly installed on the surface of the protective door 7. The user can pull the handle 701 to open the protective door 7, and then take out the collection bottle 20 filled with oil to detect the oil inside. A fixing member 101 is fixedly installed between the controller 1 and the protective shell 2, and a fixing bolt is movably installed between the fixing member 101 and the protective shell 2. The contact area between the controller 1 and the protective shell 2 is increased by the fixing member 101. The fixing bolt fixes the fixing member 101 to the protective shell 2, thereby increasing the stability of the installation of the controller 1. A box door 1501 is movably installed on the surface of the protective box 15, and a handle 1502 is fixedly installed on the surface of the box door 1501. The user can hold the handle 1502 and pull to open the box door 1501, and then place the power supply equipment or other auxiliary structures into the internal storage of the protective box 15. A fixing block 1401 is fixedly installed on the top of the protective box 15, and a protective plate 14 is fixedly installed on the top of the fixing block 1401. The protective plate 14 can block and guide rainwater to prevent rainwater from accumulating on the top of the protective box 15. The protective plate 14 is fixed to the protective box 15 by the fixing block 1401, and the anti-sliding block 1301 is fixedly installed inside the limiting block 13 outside the movable block 12, and the surface of the anti-sliding block 1301 is provided with anti-slip grooves. The anti-sliding block 1301 increases the friction between the movable block 12 and the limiting block 13, thereby increasing the stability of the installation of the protective box 15. A maintenance door 11 is movably installed on the surface of the protective shell 2 on the other side of the controller 1, and bolts are movably installed between the maintenance door 11 and the protective shell 2. The user can disassemble and replace the particulate filter 27 or the activated carbon filter 26 by unscrewing the bolts and removing the maintenance door 11. The maintenance door 11 is fixed to the protective shell 2 by bolts, a connecting piece 601 is fixedly installed on the surface of one side of the base plate 9, and a traction ring 6 is fixedly installed on the surface of one side of the connecting piece 601. The user can tow and move the device by connecting the external traction structure to the traction ring 6, and the traction ring 6 is fixed to the base plate 9 by the connecting piece 601. A connecting block 10 is fixedly installed on the surface of the other side of the protective shell 2, and a grip rod 1001 is fixedly installed between the connecting blocks 10. The user pushes the device to move by holding the grip rod 1001, and the grip rod 1001 is connected and fixed to the protective shell 2 by the connecting block 10.

[0039] Working principle: the user moves the device to the vicinity of the wellhead to be mined, removes the pumping pipe 3 from the periphery of the reel 4, guides the pumping head 5 and the pumping pipe 3 into the interior of the oil well, and the controller 1 starts the pumping pump 18 to pump the oil inside the oil well into the oil guide pipe 22 through the pumping head 5 and the pumping pipe 3. At this time, the leftmost solenoid valve 21 opens, allowing the oil to be guided into the leftmost collecting bottle 20 through the oil guide pipe 22. When the pumping interval time set by the user is reached, the controller 1 starts the pumping pump 18 again to start pumping the oil into the oil guide pipe 22. At this time, the controller 1 controls the opening of the middle solenoid valve 21, allowing the oil to be guided into the middle collecting bottle 20 through the oil guide pipe 22. When the pumping interval time set by the user is reached again, the controller 1 starts the pumping pump 18 for the last time to start. The oil is drawn into the oil pipe 22. At this time, the controller 1 controls the rightmost solenoid valve 21 to open, so that the oil is introduced into the rightmost collecting bottle 20 through the oil pipe 22, so as to realize automatic time division and separate collection and sampling of the oil. When performing the oil extraction and sampling work, the user can start the fan 25 through the controller 1. The fan 25 draws the oil and gas in the collecting bottle 20 into the protective shell 2 through the air pipe 24, and absorbs and filters the harmful substances in the gas through the activated carbon filter 26, and filters the fine harmful particles in the gas through the particle filter 27, so that the gas discharged from the device is non-toxic and harmless. The user can place the power supply equipment or other auxiliary structures used by the device into the protection box 15 for internal storage, and the power supply equipment or other auxiliary structures can be protected by the protection box 15.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A downhole sampling device for oil production, comprising a protective shell (2), a bottom plate (9) and an oil pump (18), characterized in that: A wheel (8) is fixedly mounted at the bottom of the base plate (9), and the number of the wheels (8) is four; a protective shell (2) is fixedly mounted at the top of the base plate (9); a controller (1) is fixedly mounted on the surface of the protective shell (2); limit blocks (13) are fixedly mounted on both sides of the top of the protective shell (2); a protection box (15) is movably mounted on the top of the protective shell (2) between the limit blocks (13); movable blocks (12) are fixedly mounted on the surfaces of both sides of the protection box (15), and the movable blocks (12) overlap with the limit blocks (13); a thermal insulation layer (16) is arranged inside the protection box (15), and a moisture-proof layer (17) is arranged inside the thermal insulation layer (16); A reel (4) is fixedly mounted on the surface of one side of the protective shell (2), an oil pump (18) is fixedly mounted inside the protective shell (2), an oil pump (3) is arranged on the periphery of the reel (4) on one side of the oil pump (18), an oil pumping head (5) is fixedly mounted on the bottom of the oil pumping pipe (3), a placement box (19) is fixedly mounted inside the protective shell (2) on the other side of the oil pump (18), a collecting bottle (20) is movably mounted inside the placement box (19), and the number of collecting bottles (20) is three, an oil guide pipe (22) is movably mounted inside the protective shell (2) at the top of the collecting bottle (20), and an electromagnetic valve (21) is fixedly mounted on the periphery of the oil guide pipe (22); A partition (23) is fixedly installed inside the protective shell (2) at the top of the oil guide pipe (22), a fan (25) is fixedly installed on the top of the partition (23), an air guide pipe (24) is arranged between the fan (25) and the collection bottle (20), and the air guide pipe (24) is connected to the three collection bottles (20) respectively, an activated carbon filter (26) is movably installed inside the protective shell (2) on the other side of the fan (25), and a particle filter (27) is movably installed inside the protective shell (2) on the other side of the activated carbon filter (26).

2. A downhole sampling device for oil production according to claim 1, characterized in that: A protective door (7) is movably mounted on the surface of the protective shell (2) at the bottom of the controller (1), and a handle (701) is fixedly mounted on the surface of the protective door (7).

3. A downhole sampling device for oil production according to claim 1, characterized in that: A fixing member (101) is fixedly installed between the controller (1) and the protective shell (2), and a fixing bolt is movably installed between the fixing member (101) and the protective shell (2).

4. A downhole sampling device for oil production according to claim 1, characterized in that: A box door (1501) is movably mounted on the surface of the protection box (15), and a handle (1502) is fixedly mounted on the surface of the box door (1501).

5. A downhole sampling device for oil production according to claim 1, characterized in that: A fixing block (1401) is fixedly mounted on the top of the protection box (15), and a protection plate (14) is fixedly mounted on the top of the fixing block (1401).

6. A downhole sampling device for oil production according to claim 1, characterized in that: An anti-sliding block (1301) is fixedly installed inside the limiting block (13) outside the movable block (12), and the surface of the anti-sliding block (1301) is provided with anti-slip grooves.

7. A downhole sampling device for oil production according to claim 1, characterized in that: A maintenance door (11) is movably installed on the surface of the protective shell (2) on the other side of the controller (1), and bolts are movably installed between the maintenance door (11) and the protective shell (2).

8. A downhole sampling device for oil production according to claim 1, characterized in that: A connecting piece (601) is fixedly mounted on the surface of one side of the bottom plate (9), and a traction ring (6) is fixedly mounted on the surface of one side of the connecting piece (601).

9. A downhole sampling device for oil production according to claim 1, characterized in that: A connection block (10) is fixedly mounted on the surface of the other side of the protective shell (2), and a gripping rod (1001) is fixedly mounted between the connection blocks (10).

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