A device for measuring oil-water interface in a single well tank of an oil well

Abstract

The invention discloses an oil-water interface measuring device for a single well tank of an oil well, and relates to the technical field of oil-water interface measuring. The invention comprises: an outer cylinder, the inner side wall of the outer cylinder is movably connected with an inner cylinder, the outer side wall of the outer cylinder is provided with a through hole, a test plate is arranged inside the inner cylinder, a transmission mechanism is installed on the inner side wall of the inner cylinder, and the transmission mechanism is used to transmit power to drive the internal structure of the inner cylinder to work; the device provided by the invention adopts multi-point simultaneous measurement and a data processor to display each depth measurement result, can intuitively reflect the measurement results at different depths, can intuitively represent the oil-water interface, and directly reflect the state of the oil-water mixture at different depths in the single well tank to the tester; at the same time, the test data can also be saved and then imported into the oil field production management analysis software for statistical analysis, which is helpful for oil field production management, is conducive to the promotion and application in oil field production, and is helpful to solve the difficult problem of oil-water interface measurement in oil field production.

Description

Technical Field

[0001] The invention relates to the technical field of oil-water interface measurement, in particular to an oil-water interface measurement device for a single well tank in an oil well. Background Art

[0002] In oil fields, many oil wells use single-well storage tanks to store crude oil due to geographical location or other technical reasons, and are regularly transported to refineries or other places by transport vehicles. Therefore, the daily output of oil wells is mainly obtained by measuring the crude oil in the single-well storage tank. In the single-well storage tank, oil and water often coexist, and generally after standing, the oil and water will be stratified. Under the influence of external temperature and crude oil properties, the top crude oil of the liquid in the single-well storage tank will always form a very thick layer of solidified crude oil. This very thick solidified crude oil seriously affects the determination of the oil-water interface.

[0003] The existing oil-water interface technologies include pressure difference type, float type, magnetostrictive type, ultrasonic detection type, capacitance type, etc. On the one hand, the measuring probes of the above devices are operated from top to bottom, or from bottom to top, and measure point by point during operation. However, after passing through the above solidified crude oil, its surface is easily covered by the solidified crude oil, resulting in inaccurate measurement data, and thus inaccurate measurement of single well production. More importantly, most products are inconvenient for operators to use for daily inspection due to their complex structure and large size. These detection devices are not very convenient to use in the oil well production process, and during use, crude oil will affect the inside of the detection device. For this reason, we propose an oil-water interface measurement device for a single well tank in an oil well to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that point-by-point measurements are made during operation, but after passing through the above-mentioned solidified crude oil, its surface is easily covered by the solidified crude oil, resulting in inaccurate measurement data, and thus inaccurate measurement of single well production; more importantly, most products are inconvenient for operators to use for daily inspection due to their complex structure and large size. These detection devices are not very convenient to use in the oil well production process, and the crude oil will affect the inside of the detection device during use. Therefore, a device for measuring the oil-water interface of a single well tank in an oil well is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An oil-water interface measuring device for a single well tank in an oil well, comprising:

[0007] An outer cylinder, the inner side wall of the outer cylinder is movably connected to the inner cylinder, the outer side wall of the outer cylinder is provided with a through hole, a test plate is arranged inside the inner cylinder, and a transmission mechanism is installed on the inner side wall of the inner cylinder, and the transmission mechanism is used to transmit power to drive the internal structure of the inner cylinder to work;

[0008] A mounting assembly, the mounting assembly being arranged at one end of the outer cylinder, and the end of the mounting assembly away from the outer cylinder being connected to a data processor via an electric wire;

[0009] A pushing component, the pushing component is installed inside the inner cylinder, the pushing component is driven by the transmission mechanism, and the pushing component is used to push the test plate;

[0010] A clamping assembly is driven by the pushing assembly, the clamping assembly is installed inside the inner cylinder, and the clamping assembly is used to limit the position of the test plate.

[0011] Preferably, a rubber plug is installed at the other end of the outer cylinder, a servo motor is installed at one end of the inner cylinder away from the rubber plug, a U-shaped groove is opened on the side wall of the inner cylinder, and a stopper is slidably connected to the inner side wall of the U-shaped groove.

[0012] Preferably, the mounting assembly includes a mounting plate, a plug-in column and a plug-in block; the side of the mounting plate close to the outer cylinder is fixedly connected to the end of the servo motor, the side of the mounting plate close to the outer cylinder is fixedly connected to one end of the plug-in column, the other end of the plug-in column is fitted with the inner wall of the plug-in block, and the side of the plug-in block close to the outer cylinder is fixedly connected to the outer cylinder.

[0013] Preferably, the transmission mechanism includes a plug connector, a plug slot and a bidirectional lead screw, one end of the plug connector is fixedly connected to the side of the rubber plug close to the outer cylinder, the outer wall of the other end of the plug connector is in contact with the inner wall of the plug slot, the plug slot is opened at one end of the bidirectional lead screw, and the other end of the bidirectional lead screw is connected to the inner wall of the inner cylinder through a bearing.

[0014] Preferably, the pushing assembly includes an inner airbag, an outer airbag, a push plate and a limiting slide groove; the outer side wall of the inner airbag fits with the inner side wall of the inner tube, the outer side wall of the inner airbag is fixedly connected to the outer airbag, the side wall of the push plate is fixedly connected to the end of the inner airbag, the inner side wall of the limiting slide groove is slidably connected to the push plate, the outer side wall of the push plate is slidably connected to the inner side wall of the inner tube, the limiting slide groove is opened on the inner side wall of the inner tube, and the outer side wall of the outer airbag fits with the side wall of the test plate.

[0015] Preferably, the snap-on assembly comprises a push-pull airbag, a push-pull plate, a snap-on plate and a return spring, one side of the push-pull airbag is fixedly connected to the interior of the inner tube, the other side of the push-pull airbag is fixedly connected to the side wall of the push-pull plate, the end of the push-pull plate is fixedly connected to the side wall of the snap-on plate, the side wall of the push-pull plate is fixedly connected to one end of the return spring, and the other end of the return spring is fixedly connected to the interior of the inner tube.

[0016] Preferably, the outer wall of the bidirectional screw is connected to the inner wall of the push plate via a thread, the outer wall of the bidirectional screw fits the inner ring of the inner airbag, and the outer wall of the bidirectional screw is connected to the inner wall of the inner tube via a bearing.

[0017] Preferably, the outer side wall of the outer airbag fits with the inner side wall of the U-shaped groove, the end of the outer airbag is fixedly connected to the end of the push-pull airbag, the side of the clip-on plate close to the outer airbag fits with the side wall of the test plate, and the outer side wall of the clip-on plate is slidably connected to the inner tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention utilizes a mechanical structure to prevent the measuring device from being covered by crude oil pollution before measurement, and the measuring device uses a test plate with full-depth distribution for simultaneous measurement. The test plate does not move up and down during the measurement process, and the mixed liquid does not flow up and down, thereby avoiding being covered by crude oil pollution during the measurement process and affecting the measurement effect, ensuring the accuracy of the measurement and facilitating personnel use.

[0020] 2. The device provided by the present invention adopts multi-point simultaneous measurement and a data processor to display the measurement results of each depth, which can intuitively reflect the measurement results at different depths, can intuitively represent the oil-water interface, and directly reflect the state of the oil-water mixture at different depths in the single well tank to the tester; at the same time, the test data can also be saved and then imported into the oil field production management and analysis software for statistical analysis, which is helpful for oil field production management, is conducive to promotion and application in oil field production, and helps to solve the problem of oil-water interface measurement in oil field production.

[0021] 3. When the present invention is in use, through the coordinated use of the transmission mechanism, the pushing assembly and the clamping assembly, during installation, the clamping assembly can effectively clamp and stabilize the test plate to prevent the test plate from slipping out during the installation process. During testing, the pushing assembly starts the clamping assembly through the operation of the transmission mechanism, making it impossible to clamp the test plate, and at the same time, the test plate reaches the through hole and fills the U-shaped groove, preventing crude oil from affecting the interior of the detection device during the test, thereby ensuring the accuracy of the measurement and the cleanliness of the device, reducing the burden on personnel, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an oil-water interface measuring device for a single well tank in an oil well proposed by the present invention;

[0023] Figure 2 A three-dimensional cross-sectional structural schematic diagram of an oil-water interface measuring device for a single well tank in an oil well proposed by the present invention;

[0024] Figure 3 A three-dimensional schematic diagram of the main structure of an oil-water interface measuring device for a single well tank in an oil well proposed by the present invention;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a clamping assembly of an oil-water interface measuring device for a single well tank in an oil well proposed by the present invention;

[0026] Figure 5 The present invention proposes a device for measuring the oil-water interface of a single well tank in an oil well Figure 2 The enlarged structural diagram at A in the middle;

[0027] Figure 6 The present invention proposes a device for measuring the oil-water interface of a single well tank in an oil well Figure 2 Enlarged structural diagram at B in the middle.

[0028] In the figure: 1. outer cylinder; 2. inner cylinder; 3. data processor; 4. electric wire; 5. test board; 6. mounting assembly; 61. mounting plate; 62. plug-in column; 63. plug-in block; 7. rubber plug; 8. through hole; 9. servo motor; 10. transmission mechanism; 101. plug-in connector; 102. plug-in slot; 103. bidirectional lead screw; 11. pushing assembly; 111. inner airbag; 112. outer airbag; 113. pushing plate; 114. limiting slide; 12. snap-in assembly; 121. push-pull airbag; 122. push-pull plate; 123. snap-in plate; 124. reset spring; 13. block; 14. U-shaped slot. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-6 , an oil-water interface measuring device for a single well tank in an oil well, comprising:

[0031] An outer cylinder 1, the inner wall of the outer cylinder 1 is movably connected with the inner cylinder 2, the outer wall of the outer cylinder 1 is provided with a through hole 8, a test plate 5 is arranged inside the inner cylinder 2, and a transmission mechanism 10 is installed on the inner wall of the inner cylinder 2, and the transmission mechanism 10 is used to transmit power to drive the internal structure of the inner cylinder 2 to work;

[0032] An installation component 6, the installation component 6 is arranged at one end of the outer cylinder 1, and the end of the installation component 6 away from the outer cylinder 1 is connected to the data processor 3 through the wire 4;

[0033] A pushing assembly 11, which is installed inside the inner tube 2 and driven by the transmission mechanism 10, and is used to push the test plate 5;

[0034] The clamping assembly 12 is driven by the pushing assembly 11 . The clamping assembly 12 is installed inside the inner tube 2 . The clamping assembly 12 is used to limit the position of the test plate 5 .

[0035] A rubber plug 7 is installed at the other end of the outer tube 1 , a servo motor 9 is installed at one end of the inner tube 2 away from the rubber plug 7 , a U-shaped groove 14 is opened on the side wall of the inner tube 2 , and a stopper 13 is slidably connected to the inner wall of the U-shaped groove 14 .

[0036] The mounting assembly 6 includes a mounting plate 61, a plug-in column 62 and a plug-in block 63; the side of the mounting plate 61 close to the outer tube 1 is fixedly connected to the end of the servo motor 9, the side of the mounting plate 61 close to the outer tube 1 is fixedly connected to one end of the plug-in column 62, the other end of the plug-in column 62 is fitted to the inner side wall of the plug-in block 63, and the side of the plug-in block 63 close to the outer tube 1 is fixedly connected to the outer tube 1;

[0037] The above-mentioned structure ensures the stability of the installation of the device and facilitates the operation of the device.

[0038] The transmission mechanism 10 includes a plug connector 101, a plug slot 102 and a bidirectional lead screw 103. One end of the plug connector 101 is fixedly connected to the side of the rubber plug 7 close to the outer tube 1. The outer wall of the other end of the plug connector 101 fits the inner wall of the plug slot 102. The plug slot 102 is provided at one end of the bidirectional lead screw 103. The other end of the bidirectional lead screw 103 is connected to the inner wall of the inner tube 2 through a bearing.

[0039] Through the arrangement of the above structure, the device can provide driving force for the internal components during the measurement process, thereby ensuring the stable operation of the internal components.

[0040] Among them, the pushing component 11 includes an inner airbag 111, an outer airbag 112, a push plate 113 and a limiting slide groove 114; the outer side wall of the inner airbag 111 fits with the inner side wall of the inner tube 2, the outer side wall of the inner airbag 111 is fixedly connected to the outer airbag 112, the side wall of the push plate 113 is fixedly connected to the end of the inner airbag 111, the inner side wall of the limiting slide groove 114 is slidably connected to the push plate 113, the outer side wall of the push plate 113 is slidably connected to the inner side wall of the inner tube 2, the limiting slide groove 114 is opened on the inner side wall of the inner tube 2, and the outer side wall of the outer airbag 112 fits with the side wall of the test plate 5;

[0041] By setting the above structure, when the device is working, the test plate 5 can reach the through hole 8 and fill the U-shaped groove 14, so as to prevent the crude oil from affecting the inside of the detection device during the test.

[0042] The clamping assembly 12 includes a push-pull airbag 121, a push-pull plate 122, a clamping plate 123 and a return spring 124. One side of the push-pull airbag 121 is fixedly connected to the inside of the inner tube 2, the other side of the push-pull airbag 121 is fixedly connected to the side wall of the push-pull plate 122, the end of the push-pull plate 122 is fixedly connected to the side wall of the clamping plate 123, the side wall of the push-pull plate 122 is fixedly connected to one end of the return spring 124, and the other end of the return spring 124 is fixedly connected to the inside of the inner tube 2.

[0043] By setting the above structure, the test board 5 can be effectively clamped and stabilized to prevent the test board 5 from slipping out during the installation process.

[0044] Among them, the outer wall of the bidirectional screw 103 is connected to the inner wall of the push plate 113 through a thread, the outer wall of the bidirectional screw 103 is in contact with the inner ring of the inner airbag 111, and the outer wall of the bidirectional screw 103 is connected to the inner wall of the inner tube 2 through a bearing.

[0045] Among them, the outer wall of the outer airbag 112 is fitted with the inner wall of the U-shaped groove 14, the end of the outer airbag 112 is fixedly connected to the end of the push-pull airbag 121, the side of the clamping plate 123 close to the outer airbag 112 is fitted with the side wall of the test plate 5, and the outer wall of the clamping plate 123 is slidably connected to the inner tube 2.

[0046] In the present invention, the test board 5 is first installed between the clamping plate 123 and the outer airbag 112, and then the inner tube 2 and the outer tube 1 are assembled, and the bottom of the outer tube 1 is sealed with the rubber plug 7 at the bottom of the outer tube 1, and the plug-in column 62 is inserted into the plug-in block 63. At this time, the stopper 13 is in a state of being in contact with the plug-in block 63, and the through hole 8 is staggered with the U-shaped groove 14. At this time, the inner tube 2 and the outer tube 1 are tightly matched and sealed, so as to prevent the oil-water mixture from flowing into the inner tube 2 and contaminating the test board 5 during the process of placing the device into the storage tank, thereby affecting the measurement result;

[0047] Slowly place the device into the oil-water mixture in the storage tank until it reaches the bottom of the storage tank, and keep the device in a vertical position;

[0048] The servo motor 9 is controlled to reverse, so that the inner cylinder 2 and the outer cylinder 1 rotate relatively, so that the U-shaped groove 14 of the inner cylinder 2 and the through hole 8 on the outer cylinder 1 are in the same orientation. In this process, the push plate 113 moves toward each other through the rotation of the inner cylinder 2, compressing the inner air bag 111, so that the gas in the inner air bag 111 enters the outer air bag 112 and the push-pull air bag 121, so that the outer air bag 112 pushes the test plate 5 out to fit with the through hole 8, and in this process, due to the expansion of the push-pull air bag 121, the clamping plate 123 drives the push-pull plate 122 to slide inward, so that the clamping plate 123 cannot limit the position of the test plate 5, and at this time, the oil-water mixture in the storage tank can flow into the inner cylinder 2; because the outer cylinder 1 has a through hole 8 at the full liquid level depth of the single-well tank mixed liquid, that is, the mixed liquid can keep flowing into the inner cylinder 2 as a whole between depth layers, instead of flowing in from one end and then flowing to the other end, thereby avoiding the pollution of the measuring circuit by oil dirt during the flow of the liquid;

[0049] Start the test board 5 and continue to observe for about 1 minute. During this process, the oil-water interface test board 5 collects data and sends the data to the data processor 3 to display the results through the indicator light. That is, if there is water at a certain depth, the indicator light at that depth will be green, otherwise it will be oil, and the indicator light at that depth will be red. The tester can observe the color change of the indicator light, which is the oil-water interface, and then choose whether to save the data. If so, the data will be stored in the data processor 3;

[0050] After the test is finished, the servo motor 9 is controlled to rotate forward, so that the inner cylinder 2 and the outer cylinder 1 rotate relative to each other, so that the U-shaped groove 14 of the inner cylinder 2 is staggered with the through hole 8 on the outer cylinder 1. At this time, the stopper 13 is in a state of being fitted with the plug-in block 63. In this process, the push plate 113 moves toward each other through the rotation of the inner cylinder 2, and the inner airbag 111 is stretched, so that the gas in the outer airbag 112 and the push-pull airbag 121 enters the inner airbag 111, so that the outer airbag 112 stretches the test plate 5 inward, and in this process, due to the contraction of the push-pull airbag 121, the clamping plate 123 will push the push-pull plate 122 to slide outward under the action of the reset spring 124, so that the clamping plate 123 limits the position of the test plate 5;

[0051] After the test is completed, turn off the power, take out the test device, and clean the oil on the surface of the device.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil-water interface measuring device for a single well tank in an oil well, characterized in that: include: An outer cylinder (1), wherein the inner wall of the outer cylinder (1) is movably connected to the inner cylinder (2), the outer wall of the outer cylinder (1) is provided with a through hole (8), a test plate (5) is arranged inside the inner cylinder (2), and a transmission mechanism (10) is installed on the inner wall of the inner cylinder (2), and the transmission mechanism (10) is used to transmit power to drive the internal structure of the inner cylinder (2) to work; A mounting assembly (6), wherein the mounting assembly (6) is arranged at one end of the outer cylinder (1), and an end of the mounting assembly (6) away from the outer cylinder (1) is connected to a data processor (3) via an electric wire (4); A pushing component (11), the pushing component (11) being installed inside the inner cylinder (2), the pushing component (11) being driven by the transmission mechanism (10), and the pushing component (11) being used to push the test plate (5); a clamping assembly (12), the clamping assembly (12) being driven by the pushing assembly (11), the clamping assembly (12) being installed inside the inner cylinder (2), and the clamping assembly (12) being used to limit the position of the test plate (5); A rubber plug (7) is installed at the other end of the outer cylinder (1), a servo motor (9) is installed at one end of the inner cylinder (2) away from the rubber plug (7), a U-shaped groove (14) is opened on the side wall of the inner cylinder (2), and a stopper (13) is slidably connected to the inner side wall of the U-shaped groove (14); The mounting assembly (6) comprises a mounting plate (61), a plug-in column (62) and a plug-in block (63); the side of the mounting plate (61) close to the outer cylinder (1) is fixedly connected to the end of the servo motor (9), the side of the mounting plate (61) close to the outer cylinder (1) is fixedly connected to one end of the plug-in column (62), the other end of the plug-in column (62) is in contact with the inner side wall of the plug-in block (63), and the side of the plug-in block (63) close to the outer cylinder (1) is fixedly connected to the outer cylinder (1); The transmission mechanism (10) comprises a plug connector (101), a plug slot (102) and a bidirectional lead screw (103); one end of the plug connector (101) is fixedly connected to a side of the rubber plug (7) close to the outer cylinder (1); the outer wall of the other end of the plug connector (101) is in contact with the inner wall of the plug slot (102); the plug slot (102) is provided at one end of the bidirectional lead screw (103); and the other end of the bidirectional lead screw (103) is connected to the inner wall of the inner cylinder (2) via a bearing.

2. The oil-water interface measuring device for a single well tank in an oil well according to claim 1, characterized in that: The pushing assembly (11) comprises an inner airbag (111), an outer airbag (112), a push plate (113) and a limiting slide groove (114); the outer wall of the inner airbag (111) fits with the inner wall of the inner tube (2), the outer wall of the inner airbag (111) is fixedly connected to the outer airbag (112), the side wall of the push plate (113) is fixedly connected to the end of the inner airbag (111), the inner wall of the limiting slide groove (114) is slidably connected to the push plate (113), the outer wall of the push plate (113) is slidably connected to the inner wall of the inner tube (2), the limiting slide groove (114) is opened on the inner wall of the inner tube (2), and the outer wall of the outer airbag (112) fits with the side wall of the test plate (5).

3. The oil-water interface measuring device for a single well tank in an oil well according to claim 2, characterized in that: The snap-fit ​​assembly (12) comprises a push-pull airbag (121), a push-pull plate (122), a snap-fit ​​plate (123) and a return spring (124); one side of the push-pull airbag (121) is fixedly connected to the interior of the inner tube (2); the other side of the push-pull airbag (121) is fixedly connected to the side wall of the push-pull plate (122); the end of the push-pull plate (122) is fixedly connected to the side wall of the snap-fit ​​plate (123); the side wall of the push-pull plate (122) is fixedly connected to one end of the return spring (124); and the other end of the return spring (124) is fixedly connected to the interior of the inner tube (2).

4. The oil-water interface measuring device for a single well tank in an oil well according to claim 2, characterized in that: The outer wall of the bidirectional screw (103) is connected to the inner wall of the push plate (113) through a thread, the outer wall of the bidirectional screw (103) is in contact with the inner ring of the inner airbag (111), and the outer wall of the bidirectional screw (103) is connected to the inner wall of the inner cylinder (2) through a bearing.

5. The oil-water interface measuring device for a single well tank in an oil well according to any one of claim 3, characterized in that: The outer side wall of the outer airbag (112) fits with the inner side wall of the U-shaped groove (14), the end of the outer airbag (112) is fixedly connected to the end of the push-pull airbag (121), the side of the clamping plate (123) close to the outer airbag (112) fits with the side wall of the test plate (5), and the outer side wall of the clamping plate (123) is slidably connected to the inner tube (2).

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