Oil sample collector for oil and gas field
By designing protective and sampling cylinder structures, and combining sealing balls and elastic elements to maintain pressure balance, the problems of oil sample adhesion and leakage were solved, enabling convenient cleaning and resource utilization, and improving the safety and efficiency of oil sample collection in oil and gas fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HONY CONSTR GRP CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-05-19
AI Technical Summary
When collecting high-viscosity crude oil, existing oil samplers in oil and gas fields tend to have oil samples adhering to the inner wall of the sampler. Furthermore, gas release during the collection process of gas-containing crude oil can cause the sampling tube to expand, rupture, and leak. Moreover, the oil sample adhering to the inner wall after single use cannot be recycled.
An oil sampler for oil and gas fields was designed. It adopts a protective cylinder and a sampling cylinder structure. The pressure inside and outside the sampling cylinder is kept balanced by a sealing ball and an elastic element to prevent expansion and rupture. It is also equipped with a cleaning component to facilitate the cleaning of oil samples from the inner wall and avoid waste.
This ensures consistent pressure inside and outside the sampling tube during the sampling process, preventing leakage and facilitating the cleaning of oil samples from the inner wall, thereby improving collection efficiency and resource utilization.
Smart Images
Figure CN224260329U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil sample collection technology, and in particular to an oil sample collector for oil and gas fields. Background Technology
[0002] An oil and gas field sampler is a specialized device or tool used to safely, accurately, and representatively collect crude oil or condensate samples at oil and gas production sites. Its core purpose is to obtain samples that accurately reflect the physical and chemical properties of oil at specific locations such as wellheads, pipelines, separator outlets, and storage tanks at specific points in time, for subsequent laboratory analysis.
[0003] Since oil samples from oil and gas fields are generally crude oil with high viscosity at room temperature, existing oil sample collectors tend to leave some crude oil samples adhering to the inner wall of the collection bottle after collection, making them difficult to clean.
[0004] A sample collector for oil and gas fields disclosed in Chinese patent CN222474765U has a sample storage bottle made of disposable plastic material. It is a disposable product that is easy to manufacture and inexpensive. It can be directly discarded after a single use without cleaning, which improves the convenience of using the sample collection container, reduces labor costs, and improves the efficiency of oil sample collection.
[0005] A comparison with existing technologies and solutions reveals that this oil sample collector, while addressing the problem, also has the following issues:
[0006] When collecting oil samples from oil and gas fields, the gas-bearing crude oil experiences a decrease in external pressure during the collection process, causing gas to be released from the crude oil sample. This results in the pressure inside the sample storage bottle being greater than the external pressure. Furthermore, the plastic material swells and hardens upon contact with crude oil, which may cause the sample storage bottle to expand and rupture, leading to oil sample leakage. Although the sample storage bottle can be discarded after a single use without cleaning, the oil sample adhering to the inner wall of the bottle is also discarded, resulting in waste. Utility Model Content
[0007] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide an oil sample collector for oil and gas fields.
[0008] The purpose of this utility model is achieved through the following technical solution: an oil sample collector for oil and gas fields, including a protective cylinder, a connecting rope at the top of the protective cylinder, and a sampling cylinder inside the protective cylinder;
[0009] The top of the sampling tube is threaded with a top cover, the bottom of the sampling tube is threaded with a bottom cover, and a cleaning component is installed inside the sampling tube;
[0010] A first gasket is fixedly connected to the middle of the top of the top cover, an air vent is opened in the middle of the top cover, a first connecting post is fixedly connected to the top of the top of the top cover, a first connecting plate is provided on the top of the first connecting post, and a first elastic element and a first sealing ball are provided at the bottom of the first connecting plate.
[0011] A second gasket is fixedly connected to the middle of the top of the bottom cover. An inlet is opened in the middle of the bottom cover. A second connecting post is fixedly connected to the top of the bottom cover. A second connecting plate is provided on the top of the second connecting post. A second elastic element and a second sealing ball are provided at the bottom of the second connecting plate. A sealing ring is fixedly connected to the bottom of the bottom cover.
[0012] The cleaning assembly includes cleaning scrapers and connecting rods. There are multiple cleaning scrapers connected to each other by connecting rods.
[0013] Preferably, the top of the protective cylinder is provided with a lifting ring, one end of the connecting rope is connected to the lifting ring, an opening is opened in the middle of the bottom of the protective cylinder, a weight block is fixedly connected to the bottom of the protective cylinder, an elastic plate is fixedly connected to the inner side of the protective cylinder by bolts, the elastic plate is placed between the protective cylinder and the sampling cylinder, a threaded rod is threadedly connected to the inner side of the protective cylinder, an adjusting head is fixedly connected to the top of the threaded rod, a pressure block is rotatably connected to the end of the threaded rod away from the adjusting head, and a sealing groove is opened at the bottom of the inner side of the protective cylinder.
[0014] Preferably, the first elastic element is disposed between the first sealing ball and the first connecting plate, and the position of the first sealing ball corresponds to the position of the first gasket.
[0015] Preferably, the position of the inlet corresponds to the position of the opening.
[0016] Preferably, the second elastic element is disposed between the second sealing ball and the second connecting plate, and the position of the second sealing ball corresponds to the position of the second gasket.
[0017] Preferably, the position of the sealing ring corresponds to the position of the sealing groove, and the sealing ring and the sealing groove are adapted to each other.
[0018] Preferably, the cleaning scraper is in contact with the inner wall of the sampling cylinder, and the cleaning scraper is spiral in shape.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] This oil and gas field oil sampler ensures consistent pressure inside and outside the sampling tube during oil sample collection, preventing leakage caused by the expansion and rupture of the sampling tube due to gas release from the gas-bearing oil sample. After sampling, it facilitates the cleaning of oil samples adhering to the inner wall of the sampling tube, avoiding waste.
[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0025] Figure 3 This is a schematic diagram of the oil sample flow trajectory and gas flow trajectory during oil sample collection according to this utility model.
[0026] Figure 4 This is a schematic diagram of the gas flow trajectory during gas precipitation in an oil sample according to this utility model;
[0027] Figure 5 This is a cross-sectional view of the protective cylinder of this utility model;
[0028] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A;
[0029] Figure 7 This utility model Figure 5 Enlarged structural diagram at point B;
[0030] Figure 8 This is a cross-sectional view of the sampling tube of this utility model;
[0031] Figure 9 This is a cross-sectional view of the top cover of this utility model;
[0032] Figure 10 This is a cross-sectional view of the bottom cover of this utility model;
[0033] Figure 11 This is a schematic diagram of the cleaning component of this utility model.
[0034] In the diagram: 1. Protective cylinder; 101. Lifting ring; 102. Opening; 103. Weight block; 104. Elastic plate; 105. Threaded rod; 106. Adjusting head; 107. Pressure block; 108. Sealing groove; 2. Connecting rope; 3. Sampling cylinder; 31. Top cover; 311. First gasket; 312. Air outlet; 313. First connecting post; 314. First connecting plate; 315. First elastic element; 316. First sealing ball; 32. Bottom cover; 321. Second gasket; 322. Inlet; 323. Second connecting post; 324. Second connecting plate; 325. Second elastic element; 326. Second sealing ball; 327. Sealing ring; 33. Cleaning assembly; 331. Cleaning scraper; 332. Connecting rod. Detailed Implementation
[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.
[0037] like Figures 1 to 4 As shown, an oil sample collector for an oil and gas field includes a protective cylinder 1, a connecting rope 2 at the top of the protective cylinder 1, and a sampling cylinder 3 inside the protective cylinder 1.
[0038] like Figures 5 to 7 As shown, a lifting ring 101 is provided at the top of the protective cylinder 1, and one end of the connecting rope 2 is connected to the lifting ring 101. An opening 102 is provided in the middle of the bottom of the protective cylinder 1. A weight block 103 is fixedly connected to the bottom of the protective cylinder 1 by bolts. An elastic plate 104 is fixedly connected to the inner side of the protective cylinder 1 by bolts. The elastic plate 104 is located between the protective cylinder 1 and the sampling cylinder 3. A threaded rod 105 is threadedly connected to the inner side of the protective cylinder 1. An adjusting head 106 is fixedly connected to the top of the threaded rod 105. A pressure block 107 is rotatably connected to the end of the threaded rod 105 away from the adjusting head 106. A sealing groove 108 is provided at the bottom of the inner side of the protective cylinder 1.
[0039] like Figure 8 As shown, the top of the sampling tube 3 is threadedly connected to a top cover 31, the bottom of the sampling tube 3 is threadedly connected to a bottom cover 32, and a cleaning component 33 is provided inside the sampling tube 3.
[0040] like Figure 8 and Figure 9 As shown, a first gasket 311 is fixedly connected to the middle of the top of the top cover 31, an air outlet 312 is opened in the middle of the top cover 31, a first connecting post 313 is fixedly connected to the top of the top cover 31, a first connecting plate 314 is provided on the top of the first connecting post 313, a nut is provided on the top of the first connecting post 313, the first connecting plate 314 is fixedly connected to the top of the first connecting post 313 by the nut, a first elastic element 315 and a first sealing ball 316 are provided at the bottom of the first connecting plate 314, the first elastic element 315 is located between the first sealing ball 316 and the first connecting plate 314, and the position of the first sealing ball 316 corresponds to the position of the first gasket 311;
[0041] like Figure 8 and Figure 10 As shown, a second gasket 321 is fixedly connected to the middle of the top of the bottom cover 32. An inlet 322 is opened in the middle of the bottom cover 32, and the position of the inlet 322 corresponds to the position of the opening 102. A second connecting post 323 is fixedly connected to the top of the bottom cover 32. A second connecting plate 324 is provided on the top of the second connecting post 323. A nut is provided on the top of the second connecting post 323. The second connecting plate 324 is fixedly connected to the top of the second connecting post 323 by the nut. A second elastic element 325 and a second sealing ball 326 are provided at the bottom of the second connecting plate 324. The second elastic element 325 is located between the second sealing ball 326 and the second connecting plate 324. The position of the second sealing ball 326 corresponds to the position of the second gasket 321. A sealing ring 327 is fixedly connected to the bottom of the bottom cover 32. The position of the sealing ring 327 corresponds to the position of the sealing groove 108. The sealing ring 327 and the sealing groove 108 are compatible.
[0042] like Figure 8 and Figure 11 As shown, the cleaning assembly 33 includes a cleaning scraper 331 and a connecting rod 332. The cleaning scraper 331 is in contact with the inner wall of the sampling cylinder 3. There are multiple cleaning scrapers 331, which are connected by the connecting rod 332. The cleaning scraper 331 is spiral in shape.
[0043] The work process is as follows:
[0044] S1. When collecting oil samples, the protective cylinder 1 is lowered into the oil well via the connecting rope 2. Due to the weight block 103, the protective cylinder 1 causes the sampling cylinder 3 to sink into the crude oil.
[0045] S2. When the pressure outside the sampling cylinder 3 is greater than the pressure inside, the second sealing ball 326 is pushed by the oil sample, the second elastic element 325 contracts, and the oil sample enters the sampling cylinder 3 from the inlet 322 through the gap between the second sealing ball 326 and the sealing ring 327.
[0046] S3. The air in the sampling tube 3 pushes the first sealing ball 316 to move, the first elastic element 315 contracts, and the air in the sampling tube 3 is discharged from the gap between the first sealing ball 316 and the first gasket 311 at the air outlet 312. Figure 3 As shown;
[0047] S4. When the sampling cylinder 3 is filled with oil sample, the pressure inside and outside the sampling cylinder 3 is consistent. The first elastic element 315 and the second elastic element 325 rebound, causing the first sealing ball 316 and the second sealing ball 326 to move towards the first gasket 311 and the second gasket 321 respectively, sealing the air outlet 312 and the inlet 322. Figure 2 As shown;
[0048] S5. As the connecting rope 2 pulls the protective cylinder 1, it causes the sampling cylinder 3 to rise. The external pressure on the gas-containing oil sample decreases, and gas is released from the oil sample. This causes the pressure inside the sampling cylinder 3 to be greater than the external pressure. The gas released from the oil sample in the sampling cylinder 3 pushes the first sealing ball 316 to move, and the first elastic element 315 contracts. The gas released from the oil sample is discharged from the gap between the first sealing ball 316 and the first gasket 311 at the gas outlet 312. Figure 4 As shown, always ensure that the pressure inside and outside the sampling cylinder 3 is consistent to avoid the oil sample leaking due to the expansion and rupture of the sampling cylinder 3;
[0049] S6. After sampling is completed, rotate the threaded rod 105 by adjusting the head 106 to move the pressure block 107 upward, release the limit on the sampling cylinder 3, and then take the sampling cylinder 3 out of the protective cylinder 1. Open the top cover 31 to pour out the oil sample in the sampling cylinder 3.
[0050] S7. When it is necessary to clean the sampling cylinder 3, remove the top cover 31 and the bottom cover 32 from the top and bottom of the sampling cylinder 3 respectively. Then, drive the cleaning scraper 331 to rotate inside the sampling cylinder 3 through the connecting rod 332 to clean the oil sample adhering to the inner wall of the sampling cylinder 3. The operation is convenient and avoids waste.
[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An oil sampler for oil and gas fields, characterized in that: It includes a protective cylinder (1), a connecting rope (2) is provided on the top of the protective cylinder (1), and a sampling cylinder (3) is provided inside the protective cylinder (1); The top of the sampling tube (3) is threadedly connected to a top cover (31), the bottom of the sampling tube (3) is threadedly connected to a bottom cover (32), and a cleaning assembly (33) is provided inside the sampling tube (3); A first gasket (311) is fixedly connected to the middle of the top of the top cover (31), an air outlet (312) is opened in the middle of the top cover (31), a first connecting post (313) is fixedly connected to the top of the top cover (31), a first connecting plate (314) is provided on the top of the first connecting post (313), and a first elastic element (315) and a first sealing ball (316) are provided at the bottom of the first connecting plate (314). A second gasket (321) is fixedly connected to the middle of the top of the bottom cover (32), an inlet (322) is opened in the middle of the bottom cover (32), a second connecting post (323) is fixedly connected to the top of the bottom cover (32), a second connecting plate (324) is provided on the top of the second connecting post (323), a second elastic element (325) and a second sealing ball (326) are provided on the bottom of the second connecting plate (324), and a sealing ring (327) is fixedly connected to the bottom of the bottom cover (32). The cleaning assembly (33) includes a cleaning scraper (331) and a connecting rod (332). There are multiple cleaning scrapers (331), and the multiple cleaning scrapers (331) are connected to each other by the connecting rod (332).
2. The oil sampler for oil and gas fields according to claim 1, characterized in that: The top of the protective cylinder (1) is provided with a lifting ring (101), one end of the connecting rope (2) is connected to the lifting ring (101), an opening (102) is opened in the middle of the bottom of the protective cylinder (1), a weight block (103) is fixedly connected to the bottom of the protective cylinder (1), an elastic plate (104) is fixedly connected to the inner side of the protective cylinder (1) by bolts, the elastic plate (104) is disposed between the protective cylinder (1) and the sampling cylinder (3), a threaded rod (105) is threadedly connected to the inner side of the protective cylinder (1), an adjusting head (106) is fixedly connected to the top of the threaded rod (105), a pressure block (107) is rotatably connected to the end of the threaded rod (105) away from the adjusting head (106), and a sealing groove (108) is opened at the bottom of the inner side of the protective cylinder (1).
3. The oil sampler for oil and gas fields according to claim 1, characterized in that: The first elastic element (315) is disposed between the first sealing ball (316) and the first connecting plate (314), and the position of the first sealing ball (316) corresponds to the position of the first gasket (311).
4. An oil sampler for oil and gas fields according to claim 2, characterized in that: The position of the inlet (322) corresponds to the position of the opening (102).
5. An oil sampler for oil and gas fields according to claim 1, characterized in that: The second elastic element (325) is disposed between the second sealing ball (326) and the second connecting plate (324), and the position of the second sealing ball (326) corresponds to the position of the second gasket (321).
6. An oil sampler for oil and gas fields according to claim 2, characterized in that: The position of the sealing ring (327) corresponds to the position of the sealing groove (108), and the sealing ring (327) is adapted to the sealing groove (108).
7. An oil sampler for oil and gas fields according to claim 1, characterized in that: The cleaning scraper (331) is in contact with the inner wall of the sampling cylinder (3), and the cleaning scraper (331) is spiral in shape.