Petroleum sampling device for petroleum engineering

Abstract

The utility model provides a petroleum sampling device for petroleum engineering, and belongs to the technical field of petroleum sampling. The petroleum sampling device for petroleum engineering comprises a detection cylinder, a sampling mechanism and a soil sampling mechanism, a first balancing weight is fixedly installed at the bottom of the detection cylinder, the sampling mechanism is used for extracting petroleum and comprises a sampling cylinder and a floating block, the sampling cylinder is fixedly installed in an inner cavity of the detection cylinder, and a piston is slidably installed in an inner cavity of the sampling cylinder; the soil sampling mechanism comprises sampling barrels and spiral blades, the sampling barrels are symmetrically and slidably mounted in an inner cavity of the detection barrel, and first rotating shafts are rotatably mounted in inner cavities of the sampling barrels. According to the utility model, the sampling mechanism is arranged, the detection cylinder is put into a detection well after drilling, and after the detection cylinder falls into petroleum in the well, the floating block floats upwards under the action of buoyancy and pushes the push plate to move upwards synchronously, so that the first connecting rod and the piston are driven to move upwards, negative pressure is generated in the sampling cylinder, and the first one-way valve is conducted; petroleum in a well is pumped into the sampling barrel, and sampling of the petroleum is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil sampling, and particularly relates to an oil sampling device for oil engineering. Background Technique

[0002] It is crucial to conduct exploration and sampling before oil extraction, which is an indispensable part of oil and gas exploration and production plans. By using geological and geophysical methods to predict the location and scale of oil and gas reservoirs, and analyzing rock and soil samples to determine the rock types of oil and gas reservoirs, such as sandstone, shale, etc., these directly affect the accumulation and migration characteristics of oil and gas, so as to select the most suitable extraction technology according to the characteristics of oil and gas reservoirs, such as conventional drilling, horizontal drilling or fracturing technology.

[0003] The existing oil sampling devices for oil engineering have a simple structure, generally directly extracting oil by pumping, which is inconvenient for synchronously collecting the rock and soil on the well wall of the exploration well, reducing the richness of samples. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides an oil sampling device for oil engineering that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is realized as follows:

[0006] The utility model provides an oil sampling device for oil engineering, including a detection cylinder, a sampling mechanism and a soil sampling mechanism. A first counterweight is fixedly installed at the bottom of the detection cylinder. The sampling mechanism is used for extracting oil, and the sampling mechanism includes:

[0007] A sampling cylinder, which is fixedly installed in the inner cavity of the detection cylinder, and a piston is slidably installed in the inner cavity of the sampling cylinder;

[0008] A floating block, which is slidably sleeved on the surface of the detection cylinder;

[0009] The soil sampling mechanism is used for collecting the soil on the well wall. The soil sampling mechanism includes a sampling tube and a spiral blade. The sampling tubes are symmetrically and slidably installed in the inner cavity of the detection cylinder. A first rotating shaft is rotatably installed in the inner cavity of the sampling tube, and a spiral blade is fixedly installed on the surface of the first rotating shaft for soil sampling.

[0010] In a preferred embodiment, a first connecting rod is fixedly installed on the surface of the piston, and a push plate is fixedly installed at the other end of the first connecting rod for pushing the piston.

[0011] In a preferred embodiment, a first one-way valve and a second one-way valve are symmetrically communicated with the bottom of the sampling cylinder, which are respectively used for liquid inlet and liquid discharge.

[0012] In a preferred solution, a first tooth plate is fixedly mounted on the bottom of the sampling tube for driving the sampling tube to extend out of the detection tube. A first gear is rotatably mounted in the inner cavity of the detection tube, and the first gear is meshed with the first tooth plate.

[0013] In a preferred solution, a second tooth plate is slidably mounted in the inner cavity of the detection tube, the second tooth plate is meshed with the first gear, a second connecting rod is fixedly mounted on the bottom of the second tooth plate, and a wedge ring is fixedly mounted on the bottom of the second connecting rod.

[0014] In a preferred embodiment, limiting holes are symmetrically provided on the surface of the floating block for accommodating a wedge ring, a limiting block is slidably installed in the inner cavity of the limiting hole, the limiting block is wedge-shaped and used to fix the wedge ring in the limiting hole, a spring is fixedly installed in the inner cavity of the floating block, the other end of the spring is fixedly connected to the limiting block, and a shifting block is fixedly installed on the surface of the limiting block for moving the limiting block.

[0015] In a preferred solution, the first rotating shaft is hollow and a spline groove is provided in the inner cavity of the first rotating shaft. A one-way ratchet is rotatably installed in the inner cavity of the detection tube, a second rotating shaft is fixedly installed on the side wall of the one-way ratchet, the second rotating shaft is inserted into the inner cavity of the first rotating shaft, spline teeth are fixedly installed on the surface of the second rotating shaft, and the spline teeth are slidably connected to the spline groove.

[0016] In a preferred solution, a second counterweight is slidably mounted in the inner cavity of the detection tube, a third tooth plate is fixedly mounted on the bottom of the second counterweight, the third tooth plate is meshed with the one-way ratchet, and a lifting ring is fixedly mounted on the surface of the second counterweight.

[0017] The utility model provides a petroleum sampling device for petroleum engineering, and its beneficial effects include:

[0018] 1. By setting up a sampling mechanism, the detection tube is placed in the drilling well. When the detection tube falls into the oil in the well, the float block floats upward under the action of buoyancy, pushing the push plate to move upward synchronously, thereby driving the first connecting rod and the piston to move upward, generating negative pressure in the sampling tube, and the first one-way valve is turned on, and the oil in the well is drawn into the sampling tube to complete the sampling of the oil.

[0019] 2. By setting up a soil sampling mechanism, the floating block floats upward to push the second toothed plate upward, driving the first toothed plate to drive the sampling cylinder to move toward the outer wall of the detection cylinder and abut against the side wall of the detection well. Until the detection cylinder completely falls into the oil, the second counterweight continues to descend in the inner cavity of the detection cylinder, driving the third toothed plate to move downward synchronously. At this time, the driving one-way ratchet is in an idling state. When the lifting rope is retracted upward, the second counterweight is first pulled to move upward in the inner cavity of the detection cylinder, driving the one-way ratchet to rotate clockwise, driving the second rotating shaft to rotate, and synchronously driving the first rotating shaft and the spiral blade to rotate through the spline teeth, collecting the soil on the well wall into the inner cavity of the sampling cylinder, and completing the synchronous sampling of the well wall soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a three-dimensional view provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the main cross-sectional structure provided by an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the side cross-sectional structure provided by an embodiment of the present invention;

[0024] Figure 4 is provided by an embodiment of the present invention Figure 3 magnified view at A in;

[0025] Figure 5 is provided by an embodiment of the present invention Figure 3 magnified view of B in;

[0026] Figure 6 is an exploded view of the second rotating shaft provided by an embodiment of the present invention.

[0027] In the figure: 1, detection cylinder; 2, first counterweight; 3, sampling mechanism; 301, sampling cylinder; 302, piston; 303, first connecting rod; 304, push plate; 305, floating block; 306, first one-way valve; 307, second one-way valve; 4, soil sampling mechanism; 401, sampling tube; 402, first rotating shaft; 403, spiral blade; 404, first toothed plate; 405, first gear; 406, second toothed plate; 407, second connecting rod; 408, wedge ring; 409, limiting hole; 410, limiting block; 411, spring; 412, shifting block; 413, spline groove; 414, one-way ratchet; 415, second rotating shaft; 416, spline tooth; 417, second counterweight; 418, third toothed plate; 419, lifting ring. Detailed implementation mode

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0029] Refer to Figures 1-6 , the present utility model provides a technical solution: an oil sampling device for oil engineering, including a detection cylinder 1, a sampling mechanism 3 and a soil sampling mechanism 4. A first counterweight 2 is fixedly installed at the bottom of the detection cylinder 1 for counterweight. The sampling mechanism 3 is used for extracting oil. The sampling mechanism 3 includes a sampling cylinder 301 and a floating block 305. The sampling cylinder 301 is fixedly installed in the inner cavity of the detection cylinder 1. A piston 302 is slidably installed in the inner cavity of the sampling cylinder 301 for generating negative pressure in the sampling cylinder 301 to suck oil.

[0030] Refer to Figures 1-2 , in a preferred embodiment, a first connecting rod 303 is fixedly installed on the surface of the piston 302. The other end of the first connecting rod 303 is fixedly installed with a push plate 304 for pushing the piston 302. The floating block 305 is slidably sleeved on the surface of the detection cylinder 1 for pushing the push plate 304. The bottom of the sampling cylinder 301 is symmetrically communicated with a first one-way valve 306 and a second one-way valve 307. The first one-way valve 306 conducts unidirectionally towards the inner cavity of the sampling cylinder 301, and the second one-way valve 307 conducts unidirectionally towards the outer wall of the sampling cylinder 301, respectively for liquid inlet and liquid discharge.

[0031] In a preferred embodiment, when in use, the detection tube 1 is placed in a detection well that has been drilled. When the detection tube 1 falls into the oil in the well, the float block 305 floats upward under the action of buoyancy, pushing the push plate 304 to move upward synchronously, thereby driving the first connecting rod 303 and the piston 302 to move upward, generating negative pressure in the sampling tube 301, and the first one-way valve 306 is turned on, so that the oil in the well is drawn into the sampling tube 301, completing the sampling of the oil.

[0032] Reference Figures 1-6 In a preferred embodiment, the soil sampling mechanism 4 is used to synchronously collect soil from the well wall. Through the soil samples from the well wall, the presence of oil and gas can be directly analyzed, the saturation of oil and gas can be determined, and the thickness and continuity of the oil and gas layer can be evaluated, which is helpful to more accurately estimate the underground oil and natural gas reserves. It can be used to analyze the physical and chemical properties of the reservoir, such as porosity, permeability and water content, which are key factors in evaluating reservoir quality and mining potential; the soil sampling mechanism 4 includes a sampling barrel 401 and a spiral blade 403, the sampling barrel 401 is symmetrically slidably installed in the inner cavity of the detection barrel 1, and a first rotating shaft 402 is rotatably installed in the inner cavity of the sampling barrel 401, and a spiral blade 403 is fixedly installed on the surface of the first rotating shaft 402 for soil sampling.

[0033] Reference Figures 1-6 In a preferred embodiment, a first tooth plate 404 is fixedly installed at the bottom of the sampling tube 401, which is used to drive the sampling tube 401 to extend out of the detection tube 1. A first gear 405 is rotatably installed in the inner cavity of the detection tube 1. The first gear 405 is engaged with the first tooth plate 404 and is used to drive the first tooth plate 404. A second tooth plate 406 is slidably installed in the inner cavity of the detection tube 1. The second tooth plate 406 is engaged with the first gear 405 and is used to drive the first gear 405 to rotate. A second connecting rod 407 is fixedly installed at the bottom of the second tooth plate 406, which is used to drive the second tooth plate 406 to rise and fall. A wedge ring 408 is fixedly installed at the bottom of the second connecting rod 407.

[0034] Reference Figures 1-6 In a preferred embodiment, a limiting hole 409 is symmetrically provided on the surface of the floating block 305 for accommodating the wedge ring 408. A limiting block 410 is slidably installed in the inner cavity of the limiting hole 409. The limiting block 410 is wedge-shaped and is used to fix the wedge ring 408 in the limiting hole 409. A spring 411 is fixedly installed in the inner cavity of the floating block 305. The other end of the spring 411 is fixedly connected to the limiting block 410. A shifting block 412 is fixedly installed on the surface of the limiting block 410 for shifting the limiting block 410. When the floating block 305 moves up and contacts the wedge ring 408, the limiting block 410 is squeezed, the spring 411 is compressed, and the limiting block 410 is retracted into the inner cavity of the floating block 305, then the wedge ring 408 enters the limiting hole 409, and then the spring 411 is reset, driving the limiting block 410 to be stuck on the surface of the wedge ring 408 to position the wedge ring 408.

[0035] Reference Figures 1-6 In a preferred embodiment, the first rotating shaft 402 is hollow, and a spline groove 413 is opened in the inner cavity of the first rotating shaft 402. A one-way ratchet 414 is rotatably installed in the inner cavity of the detection tube 1. It should be noted that the one-way ratchet 414 is an existing commonly used transmission component. The specific principle refers to the bicycle flywheel, and the one-way ratchet 414 rotates unidirectionally clockwise. A second rotating shaft 415 is fixedly installed on the side wall of the one-way ratchet 414. The second rotating shaft 415 is inserted into the inner cavity of the first rotating shaft 402. Spline teeth 416 are fixedly installed on the surface of the second rotating shaft 415, and the spline teeth 416 are slidably connected to the spline groove 413.

[0036] Reference Figures 1-6 In a preferred embodiment, a second counterweight block 417 is slidably installed in the inner cavity of the detection tube 1, and a third tooth plate 418 is fixedly installed at the bottom of the second counterweight block 417. The third tooth plate 418 is engaged with the one-way ratchet 414 and is used to drive the one-way ratchet 414 to rotate. A lifting ring 419 is fixedly installed on the surface of the second counterweight block 417 for connecting a lifting rope.

[0037] In a preferred embodiment, when the floating block 305 floats upward, it pushes the second connecting rod 407 and the second tooth plate 406 to move upward, driving the first gear 405 to rotate clockwise, and synchronously driving the first tooth plate 404 to drive the sampling tube 401 to move toward the outer wall of the detection tube 1 and abut against the side wall of the detection well until the detection tube 1 completely falls into the oil, and then continues to lower the lifting rope, so that the second counterweight block 417 continues to descend in the inner cavity of the detection tube 1, driving the third tooth plate 418 to move downward synchronously, and at this time drives the one-way ratchet 414 to rotate counterclockwise, which is in an idling state and cannot drive the second rotating shaft 415 to rotate, and then retracts upward. When lifting the rope, first pull the second counterweight block 417 to move up in the inner cavity of the detection tube 1, and drive the one-way ratchet 414 to rotate clockwise through the third tooth plate 418, driving the second rotating shaft 415 to rotate, and synchronously drive the first rotating shaft 402 and the spiral blade 403 to rotate through the spline teeth 416, so as to collect the mud on the well wall into the inner cavity of the sampling tube 401, and complete the synchronous sampling of the mud on the well wall. When the floating block 305 breaks away from the oil surface, it moves downward under the action of the gravity of the floating block 305, and drives the second tooth plate 406 to move downward synchronously, driving the sampling tube 401 to return to the inner cavity of the detection tube 1, so as to facilitate the removal of the detection tube 1 from the well.

[0038] Specifically, the working process or working principle of the oil sampling device for petroleum engineering is as follows: when in use, the lifting rope is fixedly connected to the lifting ring 419, and the detection tube 1 is placed in the detection well after drilling. When the detection tube 1 falls into the oil in the well, the float block 305 floats upward under the action of buoyancy, pushing the push plate 304 to move upward synchronously, thereby driving the first connecting rod 303 and the piston 302 to move upward, generating negative pressure in the sampling tube 301, and the first one-way valve 306 is turned on, so that the oil in the well is drawn into the sampling tube 301 to complete the sampling of the oil.

[0039] When the floating block 305 floats upward, it pushes the second connecting rod 407 and the second tooth plate 406 to move upward, driving the first gear 405 to rotate clockwise, and synchronously driving the first tooth plate 404 to drive the sampling tube 401 to move toward the outer wall of the detection tube 1 and abut against the side wall of the detection well, until the detection tube 1 completely falls into the oil, and then continue to lower the lifting rope, so that the second counterweight block 417 continues to descend in the inner cavity of the detection tube 1, driving the third tooth plate 418 to move downward synchronously, at this time, the one-way ratchet 414 is driven to rotate counterclockwise, which is in an idling state and cannot drive the second rotating shaft 415 to rotate. Subsequently, when the lifting rope is retracted upward, the first First, pull the second counterweight 417 upward in the inner cavity of the detection tube 1, and drive the one-way ratchet 414 to rotate clockwise through the third tooth plate 418, drive the second rotating shaft 415 to rotate, and synchronously drive the first rotating shaft 402 and the spiral blade 403 to rotate through the spline teeth 416, collect the mud on the well wall into the inner cavity of the sampling tube 401, and complete the synchronous sampling of the mud on the well wall. When the floating block 305 breaks away from the oil surface, it moves downward under the action of gravity of the floating block 305, and drives the second tooth plate 406 to move downward synchronously, driving the sampling tube 401 back to the inner cavity of the detection tube 1, so as to facilitate the removal of the detection tube 1 from the well.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A petroleum sampling device for petroleum engineering, characterized in that: The invention comprises a detection tube (1), a sampling mechanism (3) and a soil sampling mechanism (4); a first counterweight block (2) is fixedly mounted on the bottom of the detection tube (1); the sampling mechanism (3) is used to extract oil; and the sampling mechanism (3) comprises: A sampling cylinder (301), the sampling cylinder (301) is fixedly mounted in the inner cavity of the detection cylinder (1), and a piston (302) is slidably mounted in the inner cavity of the sampling cylinder (301); A floating block (305), wherein the floating block (305) is slidably sleeved on the surface of the detection tube (1); The soil sampling mechanism (4) is used for collecting soil from the well wall. The soil sampling mechanism (4) comprises a sampling tube (401) and a spiral blade (403). The sampling tube (401) is symmetrically slidably mounted in the inner cavity of the detection tube (1). A first rotating shaft (402) is rotatably mounted in the inner cavity of the sampling tube (401). The surface of the first rotating shaft (402) is fixedly mounted with a spiral blade (403) for soil sampling.

2. A petroleum sampling device for petroleum engineering according to claim 1, characterized in that: A first connecting rod (303) is fixedly mounted on the surface of the piston (302), and a push plate (304) is fixedly mounted on the other end of the first connecting rod (303) for pushing the piston (302).

3. A petroleum sampling device for petroleum engineering according to claim 2, characterized in that: The bottom of the sampling cylinder (301) is symmetrically connected to a first one-way valve (306) and a second one-way valve (307), which are used for liquid intake and liquid discharge respectively.

4. The petroleum sampling device for petroleum engineering according to claim 1, characterized in that: A first toothed plate (404) is fixedly mounted on the bottom of the sampling tube (401) for driving the sampling tube (401) to extend out of the detection tube (1); a first gear (405) is rotatably mounted in the inner cavity of the detection tube (1); the first gear (405) is meshed with the first toothed plate (404).

5. A petroleum sampling device for petroleum engineering according to claim 4, characterized in that: A second toothed plate (406) is slidably mounted in the inner cavity of the detection tube (1), the second toothed plate (406) is meshed with the first gear (405), a second connecting rod (407) is fixedly mounted at the bottom of the second toothed plate (406), and a wedge ring (408) is fixedly mounted at the bottom of the second connecting rod (407).

6. A petroleum sampling device for petroleum engineering according to claim 5, characterized in that: The surface of the floating block (305) is symmetrically provided with limiting holes (409) for accommodating a wedge-shaped ring (408); a limiting block (410) is slidably installed in the inner cavity of the limiting hole (409); the limiting block (410) is wedge-shaped and is used to fix the wedge-shaped ring (408) in the limiting hole (409); a spring (411) is fixedly installed in the inner cavity of the floating block (305); the other end of the spring (411) is fixedly connected to the limiting block (410); a shifting block (412) is fixedly installed on the surface of the limiting block (410) for shifting the limiting block (410).

7. The petroleum sampling device for petroleum engineering according to claim 1, characterized in that: The first rotating shaft (402) is hollow and has a spline groove (413) in its inner cavity. A one-way ratchet (414) is rotatably mounted in the inner cavity of the detection tube (1). A second rotating shaft (415) is fixedly mounted on the side wall of the one-way ratchet (414). The second rotating shaft (415) is plugged into the inner cavity of the first rotating shaft (402). Spline teeth (416) are fixedly mounted on the surface of the second rotating shaft (415). The spline teeth (416) are slidably connected to the spline groove (413).

8. The petroleum sampling device for petroleum engineering according to claim 7, characterized in that: A second counterweight (417) is slidably mounted in the inner cavity of the detection tube (1); a third tooth plate (418) is fixedly mounted on the bottom of the second counterweight (417); the third tooth plate (418) is meshed with the one-way ratchet (414); and a lifting ring (419) is fixedly mounted on the surface of the second counterweight (417).

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