Improved sleeve type static crude oil water content analyzer

Abstract

The utility model provides an improved sleeve type static crude oil water content analyzer which comprises a bypass pipeline, a liquid outlet pipe and a liquid inlet pipe are arranged on the upper section and the lower section of the bypass pipeline respectively, a measuring pipeline is coaxially arranged in the bypass pipeline, and a measuring probe is coaxially arranged in the measuring pipeline. The bypass pipeline and the measuring probe are fixedly connected through the sleeve upper flange and the sleeve lower flange respectively; a driving assembly is arranged on one side of the bypass pipeline, a connecting rod mechanism of the driving assembly penetrates into the bypass pipeline and is fixedly connected to the measuring pipeline, and the driving assembly drives the measuring pipeline to move up and down so that opening and closing of the measuring pipeline can be achieved. The utility model has the advantages that the cost is reduced, the structure is simplified, the assembly and disassembly are convenient, the volume is small, the occupied area is small, and the measurement precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of crude oil water content measurement technology, specifically to an improved casing-type static crude oil water content analyzer. Background Technology

[0002] In oilfield production, measuring water cut is crucial for calculating oilfield output and understanding geological changes. Traditionally, water cut is determined by manually sampling oil wells and bringing the samples back to the laboratory for analysis. This method is time-consuming, complex, and involves prolonged work in the laboratory, which poses certain health risks.

[0003] Conventional water content analyzers typically use a method where the measuring sensor is directly inserted into flowing crude oil for dynamic measurement. However, flowing crude oil has problems such as unstable flow patterns, large variations in gas content, and many impurities, which can lead to significant measurement errors.

[0004] Currently, there are online-non-real-time static moisture analyzers on the market, but they have some drawbacks: complex structure, large size, high cost, which limits their large-scale installation and use. Utility Model Content

[0005] The purpose of this invention is to provide an improved casing-type static crude oil water content analyzer that reduces costs, simplifies structure, facilitates loading and unloading, has a small size, occupies less space, and improves measurement accuracy.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An improved casing-type static crude oil water content analyzer includes a bypass pipe with an outlet pipe and an inlet pipe at the upper and lower sections, respectively. A measuring pipe is coaxially arranged inside the bypass pipe, and a measuring probe is coaxially arranged inside the measuring pipe. The bypass pipe and the measuring probe are connected and fixed by an upper flange and a lower flange of the casing, respectively. A drive assembly is provided on one side of the bypass pipe. The linkage mechanism of the drive assembly passes through the bypass pipe and is connected and fixed to the measuring pipe. The drive assembly drives the measuring pipe to move up and down, thereby realizing the opening and closing of the measuring pipe.

[0008] Furthermore, a circular baffle is provided at the bottom of the outer wall of the measuring pipe, and the up and down movement of the circular baffle is used to control the flow direction of the liquid in the sleeve; two semi-circular baffles are respectively provided in the upper part of the outer wall of the measuring pipe to prevent the liquid in the bypass pipe from entering the upper end of the measuring pipe when it flows.

[0009] Furthermore, a sealing ring is provided on the lower side of the circular baffle at the bottom of the measuring pipe to better achieve a sealing effect.

[0010] Furthermore, the lower flange of the sleeve is fixed to the sleeve base, and the sleeve base is provided with a baffle and a metal sealing block from the inside to the outside; the baffle is located outside the measuring probe at the liquid inlet of the liquid inlet pipe, and a positioning post is provided on the metal sealing block to prevent the measuring pipe from rotating due to the impact of liquid inlet pipe.

[0011] Furthermore, the upper side of the metal sealing block is provided with a double trapezoidal tooth structure, which can be squeezed and sealed with the sealing ring on the lower side of the circular baffle at the bottom of the measuring pipe.

[0012] Furthermore, the lower flange of the sleeve is provided with an inner cavity sampling tube, and the sealing ring has a channel for connecting the inner cavity and the inner cavity sampling tube; the upper flange of the sleeve is provided with a pressure balancing pipe for depressurization.

[0013] Furthermore, the measuring probe is equipped with a positioning post to ensure the concentricity of its vertical movement.

[0014] Furthermore, the drive assembly includes a housing, a motor, a lead screw, a push rod, a connecting rod, a connecting rod seal, and a connecting rod connecting seat. The motor rotation shaft located above the housing is fixedly connected to the vertically arranged lead screw. The push rod is screwed to the outside of the lead screw. The connecting rod is fixed to the push rod. The connecting rod passes through the connecting rod seal and is then connected and fixed to the connecting rod connecting seat. The connecting rod connecting seat passes through the bypass pipe and is connected and fixed to the measuring pipe.

[0015] Furthermore, a sealing cavity is provided inside the housing near the side wall of the bypass pipe, and an axial threaded hole is provided at the lower end of the sealing cavity; the connecting rod sealing seat is screwed and fixed in the threaded hole, and the part of the connecting rod passing upward through the connecting rod sealing seat and the connecting rod connecting seat are located in the sealing cavity; a multi-stage sealing ring is provided between the connecting rod sealing seat and the connecting rod.

[0016] Furthermore, a linear bearing is provided between the connecting rod seal seat and the connecting rod. The linear bearing is connected and fixed by a bearing fixing tube, which is connected to the connecting rod seal seat.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] This utility model discloses an improved casing-type static crude oil water content analyzer, which reduces costs, simplifies structure, facilitates loading and unloading, is small in size, occupies less space, and improves measurement accuracy. Specifically, the measuring pipe is nested inside the bypass pipe, eliminating the need for heating or other measures during static measurement; it avoids the valves and other components required by traditional devices, greatly improving product reliability, simplifying structure, reducing costs, and meeting the cost budget requirements for large-scale use in oil fields; the casing-type structure allows for static measurement of liquid within the measuring pipe, avoiding interference from unstable liquid flow, large variations in gas content, and numerous impurities, thus ensuring the accuracy of water content measurement; the sealing ring on the lower side of the circular baffle at the bottom of the measuring pipe and the double trapezoidal toothed structure on the upper side of the metal sealing block can be further sealed by compression, resulting in good sealing effect and long service life; the drive component is located on the side of the bypass pipe, facilitating installation and maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the longitudinal section structure of this utility model (I).

[0021] Figure 3 This is a schematic diagram of the longitudinal section structure of this utility model (II).

[0022] Figure 4 This is a schematic diagram of the operation of opening the measuring pipe according to this utility model.

[0023] Figure 5 This is a schematic diagram of the measurement pipeline closure operation of this utility model.

[0024] Figure 6 This is a schematic diagram of the external structure of the measuring pipe of this utility model.

[0025] Figure 7 This is a schematic diagram of the sealing cavity structure of this utility model.

[0026] Reference numerals: 1. Bypass pipe; 2. Outlet pipe; 3. Inlet pipe; 4. Measuring pipe; 41. Circular baffle; 42. Semi-circular baffle; 5. Measuring probe; 6. Drive assembly; 61. Housing; 62. Motor; 63. Lead screw; 64. Push rod; 65. Connecting rod; 66. Connecting rod seal seat; 67. Connecting rod connecting seat; 68. Sealing cavity; 69. Linear bearing; 610. Bearing fixing tube; 7. Sleeve base; 71. Baffle; 72. Sealing ring; 73. Metal sealing block; 74. Positioning column; 8. Inner cavity sampling tube. Detailed Implementation

[0027] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0028] like Figure 1 , 2 As shown, an improved casing-type static crude oil water content analyzer includes a bypass pipe 1, with an outlet pipe 2 and an inlet pipe 3 respectively installed at the upper and lower sections. A measuring pipe 4 is coaxially installed inside the bypass pipe 1, and a measuring probe 5 is coaxially installed inside the measuring pipe 4. The bypass pipe 1 and the measuring probe 5 are connected and fixed by an upper flange and a lower flange of the casing, respectively. The internal space of the bypass pipe 1 is divided into an outer cavity and an inner cavity by the measuring pipe 4. The inlet pipe 3 is fixedly installed at the lower end of the outer wall of the bypass pipe 1, and the outlet pipe 2 is fixedly installed at the upper end of the outer wall of the bypass pipe 1, below the opening at the upper end of the measuring pipe 4. A drive assembly 6 is installed on one side of the bypass pipe 1. The linkage mechanism of the drive assembly 6 passes through the bypass pipe 1 and is connected and fixed to the measuring pipe 4. The drive assembly 6 drives the measuring pipe 4 to move up and down, thereby realizing the opening and closing of the measuring pipe 4.

[0029] like Figure 6 As shown, a circular baffle 41 is provided at the bottom of the outer wall of the measuring pipe 4. The up-and-down movement of the circular baffle 41 is used to control the flow direction of the liquid inside the sleeve. Two semi-circular baffles 42 are respectively provided in the upper middle part of the outer wall of the measuring pipe 4 to prevent the liquid in the bypass pipe 1 from flowing into the upper end of the measuring pipe 4. Specifically, as shown... Figure 4 , 5 As shown, when the drive assembly 6 moves the measuring pipe 4 upward, the annular baffle 41 at the bottom of the outer wall of the measuring pipe 4 moves upward and abuts against the inner wall of the bypass pipe 1, thereby opening the measuring pipe 4. At this time, the liquid in the inlet pipe 3 passes through the inside (inner cavity) of the measuring pipe 4. When the drive assembly 6 moves the measuring pipe 4 downward, the sealing ring 72 on the lower side of the annular baffle 41 at the bottom of the measuring pipe 4 moves downward and abuts against the metal sealing block 73 provided on the sleeve base 7, thereby closing the measuring pipe 4 and opening the bypass pipe 1. At this time, the liquid in the inlet pipe 3 passes through the inside (outer cavity) of the bypass pipe 1.

[0030] Furthermore, the lower flange of the sleeve is fixedly connected to the sleeve base 7, and a sealing gasket is provided between the lower flange and the sleeve base 7. The sleeve base 7 is provided with a baffle 71 and a metal sealing block 73 from the inside out. The baffle 71 is located outside the measuring probe 5 at the liquid inlet of the inlet pipe 3. The baffle 71 is designed to prevent the liquid inside the pipe from directly impacting the measuring probe 5, thereby improving the service life of the measuring probe 5. The metal sealing block 73 is sealed by compression with the sealing ring 72 on the lower side of the annular baffle 41 at the bottom of the measuring pipe 4 through a double trapezoidal tooth structure. A positioning post 74 is provided on the metal sealing block 73 to prevent the measuring pipe 4 from rotating due to the impact of the liquid entering the inlet pipe 3.

[0031] Furthermore, the measuring probe is equipped with a positioning post 74 to ensure the concentricity of the measuring pipe as it moves up and down.

[0032] The lower flange of the sleeve is provided with an inner cavity sampling tube 8, and the sealing ring 72 has a channel for connecting the inner cavity and the inner cavity sampling tube 8; the upper flange of the sleeve is provided with a pressure balancing pipe as a pressure relief port.

[0033] like Figure 3 As shown, the drive assembly 6 includes a housing 61, a motor 62, a lead screw 63, a push rod 64, a connecting rod 65, a connecting rod sealing seat 66, and a connecting rod connecting seat 67. The rotating shaft of the motor 62, located above the housing 61, is fixedly connected to the vertically arranged lead screw 63. The push rod 64 is screwed to the outside of the lead screw 63, and the connecting rod 65 is fixed to the push rod 64. The connecting rod 65 passes through the connecting rod sealing seat 66 and is then connected and fixed to the connecting rod connecting seat 67. The connecting rod connecting seat 67 passes through the bypass pipe 1 and is connected and fixed to the measuring pipe 4. The operation of the motor 62 drives its rotating shaft to rotate, which in turn drives the lead screw 63 to rotate. The rotation of the lead screw 63 causes the push rod 64 to move up and down, thereby causing the connecting rod 65 to move up and down. The connecting rod 65 drives the connecting rod connecting seat 67, which in turn drives the measuring pipe 4. This series of linkages allows the measuring pipe 4 to move up or down, thus realizing the opening and closing of the measuring pipe 4.

[0034] Furthermore, such as Figure 7 As shown, a sealing cavity 68 is provided inside the housing 61 near the side wall of the bypass pipe 1, and an axial threaded hole is provided at the lower end of the sealing cavity 68. The connecting rod sealing seat 66 is screwed and fixed in the threaded hole, and the part of the connecting rod 65 passing upward through the connecting rod sealing seat 66 and the connecting rod connecting seat 67 are located in the sealing cavity 68. A multi-stage sealing ring is provided between the connecting rod sealing seat 66 and the connecting rod 65. Liquid in the pipe can enter the sealing cavity 68, but cannot enter the connecting rod sealing seat 66 and its lower part, that is, cannot enter the part outside the sealing cavity 68 inside the housing 61, thereby ensuring that the main drive structure of the drive assembly 6 is not wetted and corroded by liquid, realizing the safe operation of the drive assembly 6 and extending its service life.

[0035] To further improve the precision of the drive assembly 6, a linear bearing 69 is provided between the connecting rod seal 66 and the connecting rod 65. The linear bearing 69 is connected and fixed by a bearing fixing tube 610, which is connected to the connecting rod seal 66.

[0036] The working principle of this utility model is as follows: When the equipment is powered on and the start-up time is reached, the remote control motor 62 drives each component to work, thereby moving the measuring pipe 4 upward, opening the measuring pipe 4, closing the bypass pipe 1, and allowing the liquid inside the pipe to pass through the measuring pipe 4; after a period of time, the motor 62 drives each component to move the measuring pipe 4 downward, opening the bypass pipe 1, closing the measuring pipe 4, and allowing the liquid inside the pipe to pass through the bypass pipe 1. At this time, the liquid in the measuring pipe 4 is intercepted and sampled, and the moisture content is measured and analyzed by the measuring probe 5 inside the measuring pipe 4; when the measurement time set by the remote control is reached, the motor 62 is controlled again to drive each component to operate, opening the measuring pipe 4, allowing the liquid inside the pipe to pass through the measuring pipe 4, carrying away the liquid intercepted and retained in the pipe last time, and entering the next sampling and measurement cycle.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An improved casing static crude oil water cut analyzer, comprising a bypass pipe, a liquid outlet pipe and a liquid inlet pipe are arranged on the upper and lower sections of the bypass pipe respectively, characterized in that: The bypass pipeline is coaxially provided with a measuring pipeline, and the measuring pipeline is coaxially provided with a measuring probe, and the bypass pipeline and the measuring probe are respectively connected and fixed through the upper flange and the lower flange of the sleeve; a driving assembly is arranged on one side of the bypass pipeline, the connecting rod mechanism of the driving assembly penetrates the bypass pipeline and is connected and fixed to the measuring pipeline, the driving assembly drives the measuring pipeline to move up and down, so that the opening and closing of the measuring pipeline are realized.

2. The improved canister-type static crude oil water cut analyzer according to claim 1, characterized in that: A circular baffle is arranged at the bottom of the outer wall of the measuring pipeline, and the up-and-down movement of the circular baffle is used to control the flow direction of the liquid in the sleeve; two semicircular baffles are respectively arranged at the upper part of the outer wall of the measuring pipeline, and are used to prevent the liquid in the bypass pipeline from flowing into the upper end of the measuring pipeline.

3. An improved probe type static crude oil water cut analyzer as claimed in claim 2 wherein: A sealing ring is arranged at the lower side of the circular baffle at the bottom of the measuring pipeline, so that the sealing effect is better.

4. An improved probe type static crude oil water cut analyzer according to claim 2 or 3, characterized in that: The lower flange of the sleeve is connected and fixed to the sleeve base, and the sleeve base is sequentially provided with a baffle and a metal sealing block from inside to outside; the baffle is arranged outside the measuring probe at the liquid inlet of the liquid inlet pipe, and a positioning column is arranged on the metal sealing block to prevent the rotation of the measuring pipeline caused by the liquid inlet impact.

5. An improved probe type static crude oil water cut analyzer as claimed in claim 4 wherein: A double-trapezoidal tooth structure is arranged on the upper side of the metal sealing block, and can be extruded and sealed with the sealing ring at the lower side of the circular baffle at the bottom of the measuring pipeline.

6. An improved probe type static crude oil water cut analyzer as claimed in claim 5 wherein: An inner cavity sampling pipe is arranged on the lower flange of the sleeve, and a channel for connecting the inner cavity and the inner cavity sampling pipe is arranged on the sealing ring; a pressure balance pipe is arranged on the upper flange of the sleeve to release pressure.

7. The improved probe type static crude oil water cut analyzer according to claim 1, wherein: The measuring probe is provided with a positioning column to ensure the concentricity of the up-and-down movement thereof.

8. The improved canister-type static crude oil water cut analyzer according to claim 1 or 2, characterized in that: The driving assembly comprises a casing, a motor, a lead screw, a push rod, a connecting rod, a connecting rod sealing seat and a connecting rod connecting seat, the rotating shaft of the motor located above the casing is fixedly connected with the vertically arranged lead screw, the push rod is screwed on the outer side of the lead screw, the connecting rod is fixed on the push rod, the connecting rod is connected and fixed with the connecting rod connecting seat after penetrating the connecting rod sealing seat, and the connecting rod connecting seat penetrates the bypass pipeline and is connected and fixed to the measuring pipeline.

9. An improved probe type static crude oil water cut analyzer as claimed in claim 8 wherein: A sealing cavity is arranged in the casing close to the side wall of the bypass pipeline, an axial threaded hole is arranged at the lower end of the sealing cavity, the connecting rod sealing seat is screwed and fixed in the threaded hole, and the part of the connecting rod penetrating the connecting rod sealing seat and the connecting rod connecting seat is located in the sealing cavity; a plurality of sealing rings are arranged between the connecting rod sealing seat and the connecting rod.

10. The improved canister-type static crude oil water cut analyzer according to claim 9, characterized in that: A linear bearing is further arranged between the connecting rod sealing seat and the connecting rod, and the linear bearing is connected and fixed through a bearing fixing pipe connected with the connecting rod sealing seat.

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