Portable oil tank section sampler

Abstract

The utility model discloses a portable oil tank section sampler, which belongs to the technical field of oil tank measuring equipment and comprises a sampler body, a telescopic mechanism and a sealing mechanism, the sampler body is of a hollow pipe structure, the telescopic mechanism is connected with the sampler body and used for driving the sampler body to do telescopic motion, and the sealing mechanism is connected with the sampler body and used for driving the sampler body to do telescopic motion. The sealing device is used for sealing the sampler body after sampling. The sampler body can dive into a deeper oil well liquid storage tank through the telescopic structure, oil liquid in an oil tank is collected through opening and closing of the sealing mechanism, the structure is simple, operation is rapid, the liquid production capacity and the oil production capacity of one stage can be accurately measured, and the sampling efficiency is improved. The problems of sampling difficulty caused by a narrow sampling port of the liquid storage tank, large error of conventional instantaneous sampling test data and potential safety hazards in oil measurement by a steel ruler can be effectively solved, and the device is simple to operate and convenient to carry.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil tank measuring equipment, and in particular relates to a portable oil tank cross-section sampler. Background Art

[0002] Well metering in oil fields is a basic and extremely important work in oil fields. The data collected by well metering is mainly used for oil well production calculation, reserve control and production management in the oil field production process. The accuracy of its measurement directly affects the authenticity, accuracy and reliability of first-hand data, thus affecting the reasonable development deployment and economic benefits of the oil field.

[0003] In the prior art, oil well metering is done by oil workers using a steel ruler to measure the liquid level in the liquid storage tank, and calculating the liquid production based on the change in the liquid level in the liquid storage tank; oil well testing is done by oil workers using a sampling bottle at the wellhead to collect the instantaneous liquid production, test the instantaneous water content, and take multiple samples to get the average value. The conventional oil well metering and testing method has the following problems: 1. Oil workers need to carry two tools: a measuring tool (steel ruler) and a simple sampling tool (sampling bottle), which have no uniform model and size, and no scale display; 2. The water content data of the instantaneous sampling test is inaccurate, the sampling test data at different time periods have large deviations, and multiple sampling is time-consuming and labor-intensive, with high work intensity;

[0004] 3. Most of the oil wells in the eastern part of Yanchang are pumped intermittently, and most of the pumping takes place at night. Sampling at night is difficult, which poses a safety hazard. 4. Due to insufficient fluid supply in the reservoir, even the oil wells are pumped intermittently during the pumping period, and the regularity of fluid replenishment in the oil wells is difficult to control. Oil workers can only wait for fluid to be replenished before taking samples, which prolongs the waiting time and increases the workload of workers. 5. Liquid storage tanks are buried tanks, and the liquid outlets of some liquid storage tanks are narrow and deep from the tank mouth, making it difficult for the sampling bottle to get close to the liquid outlet, and some oil wells cannot even be sampled. 6. When a steel ruler is used to measure the liquid height in the oil storage tank, the friction between the steel ruler and the iron tank is likely to generate electric sparks, which poses a flash explosion safety risk in an environment with a high oil-gas ratio. Utility Model Content

[0005] The utility model aims to provide a portable oil tank cross-section sampler, which solves the technical problem of difficulty in sampling due to the narrow sampling port of the liquid storage tank in the prior art.

[0006] The technical solution adopted by the utility model is a portable oil tank cross-section sampler, which includes a sampler body, a telescopic mechanism and a sealing mechanism. The sampler body is a hollow tube structure, the telescopic mechanism is connected to the sampler body and is used to drive the sampler body to perform telescopic movement, and the sealing mechanism is connected to the sampler body and is used to seal the sampler body after sampling.

[0007] The utility model is also characterized in that:

[0008] The telescopic mechanism comprises a first-stage telescopic threaded rod, a threaded section is arranged on the top of the inner cavity of the sampler body, a threaded structure is arranged on the bottom of the first-stage telescopic threaded rod, and the first-stage telescopic threaded rod is cooperatively connected with the threaded section.

[0009] The top of the first-stage telescopic threaded rod is fixedly connected with a first-stage handle.

[0010] The sealing mechanism includes a secondary telescopic threaded rod, which passes through the primary handle and the primary telescopic threaded rod and extends to the bottom of the inner cavity of the sampler body. The bottom end of the secondary telescopic threaded rod is fixedly connected with a telescopic body, which is used to seal the sampler body.

[0011] A sealing body is arranged at the bottom of the inner cavity of the sampler body, and the telescopic body is in sealing cooperation with the sealing body.

[0012] The sealing surface between the telescopic body and the sealing body adopts conical surface sealing.

[0013] The top end of the secondary telescopic threaded rod is fixedly connected with a secondary handle.

[0014] The sampler body adopts a transparent aluminum-plastic tube, and scale lines are arranged on the outer wall of the sampler body.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model uses a telescopic structure to enable the sampler body to dive into a deeper oil well liquid storage tank, and collects the oil in the oil tank by opening and closing the sealing mechanism. The utility model has a simple structure and is quick to operate, and can accurately measure the liquid production and oil production of a stage. It can effectively solve the problems of sampling difficulties caused by the narrow sampling port of the liquid storage tank, large errors in conventional instantaneous sampling test data, and safety hazards in measuring oil with a steel ruler. The utility model is simple to operate and easy to carry.

[0017] The utility model solves the problems of uncertain sampling time, great sampling difficulty, inability to sample, large sampling test errors, and potential safety hazards in measuring oil with a steel ruler, greatly reduces the workload of oil producers, can accurately measure the liquid production and oil production of oil wells, and provide technical personnel with real and accurate production data, providing data support for oil well reservoir transformation, technical measures to tap potential, water injection development, well network adjustment, etc., which is of great significance to the efficient development of oil fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a portable oil tank cross-section sampler.

[0019] In the figure, 1. secondary handle, 2. secondary telescopic threaded rod, 3. primary handle, 4. primary telescopic threaded rod, 5. threaded section, 6. sampler body, 7. sealing body, 8. telescopic body. DETAILED DESCRIPTION

[0020] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Example 1

[0022] like Figure 1 As shown, the portable oil tank cross-section sampler disclosed in the utility model includes a sampler body 6, a telescopic mechanism and a sealing mechanism. The sampler body 6 is a hollow tube structure. The telescopic mechanism is connected to the sampler body 6 to drive the sampler body 6 to do telescopic movement. The sealing mechanism is connected to the sampler body 6 to seal the sampler body 6 after sampling. The sampler body 6 adopts a transparent aluminum-plastic tube, and the outer wall of the sampler body 6 is provided with scale lines.

[0023] The utility model is connected with the sampler body 6 by setting a telescopic mechanism, and the sampler body 6 can dive into a deeper oil well liquid storage tank through the telescopic structure, and the oil in the oil tank can be collected by opening and closing the sealing mechanism. The structure is simple and the operation is fast. In addition, during the specific implementation of the utility model, the liquid production and oil production of a stage can be accurately measured, and the sampling difficulties caused by the nighttime pumping of the oil well, the difficulty in grasping the liquid supply law, and the narrow sampling port of the liquid storage tank can be effectively solved. The operation is simple and easy to carry. During transportation, a rubber protective cover can be installed on the outside of the portable oil tank cross-section sampler to avoid damage during transportation.

[0024] Example 2

[0025] On the basis of Example 1, the telescopic mechanism includes a first-level telescopic threaded rod 4, a threaded section 5 is provided at the top of the inner cavity of the sampler body 6, the bottom of the first-level telescopic threaded rod 4 is a threaded structure, the first-level telescopic threaded rod 4 is cooperatively connected with the threaded section 5, and a first-level handle 3 is fixed to the top of the first-level telescopic threaded rod 4.

[0026] The sealing mechanism includes a secondary telescopic threaded rod 2, which passes through the primary handle 3 and the primary telescopic threaded rod 4 and extends to the bottom of the inner cavity of the sampler body 6. The bottom end of the secondary telescopic threaded rod 2 is threadedly connected to the telescopic body 8, and the telescopic body 8 is used to seal the sampler body 6. The top end of the secondary telescopic threaded rod 2 is threadedly connected to the secondary handle 1.

[0027] The bottom of the inner cavity of the sampler body 6 is provided with a sealing body 7. In actual use, the sealing body 7 is generally fixed to the inner wall of the sampler body 6, and the telescopic body 8 is sealed with the sealing body 7. It should be noted that the positional relationship between the telescopic body 8 and the sealing body 7 here can be that the telescopic body 8 is on top, or the sealing body 7 is on top, or the telescopic body 8 and the sealing body 7 are in the horizontal direction. In this embodiment, in order to achieve sealing to the greatest extent, the telescopic body 8 is arranged below the sealing body 7, and combined with the pressure of the oil, sealing is achieved to the greatest extent.

[0028] In the specific implementation, the operator holds the sampler body 6 with one hand and the first-level handle 3 with the other hand, rotates the first-level handle 3 counterclockwise, the first-level telescopic threaded rod 4 moves down, the sealing body 7 is separated from the telescopic body 8, and the first-level handle 3 is stopped from rotating after about 3 cm; the utility model is slowly lowered vertically to the liquid storage tank, and the lowering is stopped after the telescopic body 8 contacts the bottom of the tank; the operator holds the sampler body 6 with one hand and the first-level handle 3 with the other hand, rotates the first-level handle 3 clockwise, the first-level telescopic threaded rod 4 moves up, and the sealing body 7 contacts the telescopic body 8; holds the first-level handle 3 with one hand and the second-level handle 1 with the other hand, rotates the second-level handle 1 clockwise, the second-level telescopic threaded rod 2 moves up, and the sealing body 7 is sealed with the telescopic body 8.

[0029] Example 3

[0030] On the basis of Example 2, the sealing surface of the telescopic body 8 and the sealing body 7 adopts a conical surface seal, and the telescopic body 8 and the sealing body 7 can be sealed with a rubber material. The conical seal has a self-adjusting ability and can achieve size adaptation. Specifically, when the conical seal contacts the sealing surface, since the roundness of the two cannot be completely consistent, a slight deviation will occur between the sealing surfaces. During operation, the conical seal will automatically adjust its shape to adapt to the deviation of the sealing surface and ensure that the sealing performance is not affected.

[0031] The sampler and the measuring ruler are designed to be integrated. By selecting a transparent aluminum-plastic tube material and setting a clear scale line, this setting is high in strength, light in weight, and not easy to break. The transparent material can visually observe the liquid state of the sampler, obtain the liquid column cross-section slug in the oil well storage tank, and can obtain the oil-water cross-section and interface in the oil storage tank in real time. The liquid level in the storage tank can be measured, so as to accurately calculate the volume of the liquid in the storage tank;

[0032] By testing the water content of the plug, the water content of the produced liquid in the liquid storage tank can be calculated; at the same time, the height of the liquid in the liquid storage tank is measured, and the liquid volume is calculated using the volume method. The accurate liquid volume, crude oil volume and water volume in the liquid storage tank can be calculated by multiplying the liquid storage volume by the water content. In this way, the real water content of the pumping well during this period of time can be obtained, and accurate production data can be obtained at the first time. The liquid production and oil production of a stage can be accurately measured in one operation, which can effectively solve the sampling difficulties caused by reasons such as nighttime pumping of oil wells, difficulty in grasping the liquid uptake law, and narrow sampling port of the liquid storage tank. It is simple to operate and easy to carry.

[0033] Slowly take out the portable oil well cross-section sampling meter, read the liquid level value on the outer wall, and record the liquid level h1 of the liquid storage tank; measure the length a and width b of the liquid storage tank, and calculate the liquid volume V in the liquid storage tank 液1 =a×b×h1.

[0034] Insert the lower end of the portable oil well cross-section sampling meter into the sampling bottle, hold the sampler body 6 with one hand, hold the first-level handle 3 with the other hand, rotate the first-level handle 3 counterclockwise, the first-level telescopic threaded rod moves down 4, the sealing body 7 is separated from the telescopic body 8, and the liquid in the portable oil well cross-section sampling meter flows into the sampling bottle. Test the water content W1 of the liquid in the sampling bottle and calculate the volume V of the crude oil in the storage tank 油1 =V 液1 ×1-W1.

[0035] After the oil well is in normal production for a period of time, repeat the above steps to calculate the liquid volume V in the storage tank. 液2 and the volume of crude oil in the tank V 油2 .

[0036] V 产液 =V 液2 -V 液1

[0037] V 产油 =V 油2 -V 油1

[0038] Based on the difference between liquid production and oil production, the exact liquid production and oil production in a certain period of time can be accurately calculated.

Claims

1. Portable oil tank cross-section sampler, characterized in that: The sampler comprises a sampler body (6), a telescopic mechanism and a sealing mechanism, wherein the sampler body (6) is a hollow tube structure, the telescopic mechanism is connected to the sampler body (6) and is used to drive the sampler body (6) to perform telescopic movement, and the sealing mechanism is connected to the sampler body (6) and is used to seal the sampler body (6) after sampling; The telescopic mechanism comprises a primary telescopic threaded rod (4), a threaded section (5) is provided at the top of the inner cavity of the sampler body (6), the bottom of the primary telescopic threaded rod (4) is a threaded structure, and the primary telescopic threaded rod (4) is cooperatively connected with the threaded section (5); A first-level handle (3) is fixedly connected to the top of the first-level telescopic threaded rod (4); The sealing mechanism comprises a secondary telescopic threaded rod (2), the secondary telescopic threaded rod (2) passing through the primary handle (3) and the primary telescopic threaded rod (4) and extending to the bottom of the inner cavity of the sampler body (6), the bottom end of the secondary telescopic threaded rod (2) being fixedly connected to a telescopic body (8), the telescopic body (8) being used to seal the sampler body (6); A sealing body (7) is provided at the bottom of the inner cavity of the sampler body (6), and the telescopic body (8) is in sealing cooperation with the sealing body (7); The sealing surface between the telescopic body (8) and the sealing body (7) adopts a conical surface seal; A secondary handle (1) is fixedly connected to the top end of the secondary telescopic threaded rod (2); The sampler body (6) is made of a transparent aluminum-plastic tube, and scale lines are arranged on the outer wall of the sampler body (6).

Images