A high temperature high pressure filtrate receiver

Abstract

The utility model relates to a high temperature high pressure filtrate receiver relates to oil well drilling fluid experiment technical field has solved the technical problem that the filtrate of passing through liquid outlet passage discharge causes the blockage of liquid outlet passage, including cylinder, be provided with the inner chamber on the cylinder, the bottom of cylinder is installed with the sealing cover, the top of sealing cover is fixedly connected with the sealing plug, is provided with the sealing ring between sealing plug and cylinder inner wall, the inner wall top of cylinder is provided with the liquid inlet channel, the top of sealing plug is provided with the mounting groove, is installed with the detachable ring frame in the mounting groove, is fixedly connected with the filter screen in the ring frame, the bottom of mounting groove is provided with the liquid outlet channel, the utility model discloses a filter screen is set up on sealing plug to filter the filtrate in the liquid outlet channel, make the insoluble and crystallization of filtrate carry and filter out, make the filtrate can smoothly discharge, effectively avoided the insoluble and crystallization of filtrate carry and accumulated in the liquid outlet channel, cause the filtrate discharge capacity to reduce even stop.

Description

Technical Field

[0001] This utility model relates to the field of oil well drilling fluid testing technology, specifically a high-temperature and high-pressure filtrate receiver. Background Technology

[0002] When extracting oil from oil wells, boreholes need to be drilled according to the well layout system planned for the oilfield development. These boreholes are the channels through which oil rises from the bottom of the well to the wellhead. Drilling fluid is used to assist in oil well extraction. The basic components of oil well drilling fluid are oil, water, organic clay, and oil-soluble chemical treatment agents. Before using oil well drilling fluid, in order to ensure the stability and effectiveness of the drilling fluid under extreme environments, high-temperature and high-pressure tests are required. During the high-temperature and high-pressure tests of drilling fluid, a filtrate receiver is used to collect and measure the drilling fluid.

[0003] Existing filtrate receivers test drilling fluid under high temperature and high pressure conditions by placing the filtrate into the filtrate receiver cylinder and releasing it for collection after depressurization.

[0004] However, during high-temperature and high-pressure tests, the filtrate may contain insoluble matter and crystals, which can cause the filtrate to be blocked in the outlet channel when it is discharged. This can lead to a reduction in the amount of filtrate discharged or even prevent its discharge from occurring, making the outlet valve unusable and affecting the analysis of subsequent test results by the staff.

[0005] Based on this, the present invention provides a high-temperature and high-pressure filtrate receiver to solve the above problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a high temperature and high pressure filtrate receiver. This utility model has a novel structure and ingenious design, and effectively solves the technical problem that the filtrate discharged through the filtrate outlet channel is blocked due to high temperature and high pressure.

[0007] A high-temperature, high-pressure filtrate receiver includes a cylindrical body with an inner cavity. A sealing cap is installed at the bottom of the cylindrical body, and a sealing plug is fixedly connected to the top of the sealing cap. The sealing plug is located in and cooperates with the inner cavity of the cylindrical body. A sealing ring is provided between the sealing plug and the inner wall of the cylindrical body. A liquid inlet channel is provided at the top of the inner wall of the cylindrical body. An installation groove is provided at the top of the sealing plug. A detachable annular frame is installed in the installation groove, and a filter screen is fixedly connected in the annular frame. A liquid outlet channel is provided at the bottom of the installation groove. A gas pressure relief valve is installed on one side of the cylindrical body, and the input end of the gas pressure relief valve is connected to the inner cavity.

[0008] Preferably, both sides of the mounting groove are provided with "L"-shaped limiting grooves, and the bottom of both limiting grooves are fixedly connected with clamping blocks, and one side of both clamping blocks is provided with a slope.

[0009] Preferably, limit blocks are fixedly connected to both sides of the annular frame, the two limit blocks are slidably installed in the two limit grooves respectively, the two clamping blocks clamp and fix the limit blocks located in the corresponding limit grooves respectively, and push blocks are connected to both sides of the top of the annular frame.

[0010] Preferably, both sides of the inner cavity are provided with flow guiding components. The flow guiding components include a first flow guiding plate and a second flow guiding plate. One end of the first flow guiding plate and the second flow guiding plate are connected together, and the connecting part is fixedly connected to the side wall of the inner cavity. The first flow guiding plate is provided with a liquid discharge hole.

[0011] Preferably, the first guide plate and the second guide plate extend in opposite directions from the connecting part, forming a V-shaped structure with the opening facing the center of the inner cavity. The first guide plate is inclined upward in the radial direction towards the axis of the cylinder from the connecting part, and the second guide plate is inclined downward in the radial direction towards the axis of the cylinder from the connecting part.

[0012] Preferably, the other end of the liquid inlet channel passes through the cylinder and is located on one side of the cylinder. A back pressure pipe is fixedly connected to the top of one side of the cylinder. The back pressure pipe is connected to the liquid inlet channel. The liquid outlet channel passes through the sealing plug and the sealing cap and is located on one side of the sealing cap. A liquid outlet valve is fixedly connected to one side of the bottom of the sealing cap. The liquid outlet valve is connected to the liquid outlet channel.

[0013] The present invention has the following technical effects.

[0014] 1. This utility model filters the filtrate entering the outlet channel by setting a filter screen on the sealing plug, allowing the insoluble matter and crystals carried by the filtrate to be filtered out and the filtrate to be discharged smoothly. This effectively avoids the accumulation of insoluble matter and crystals carried by the filtrate in the outlet channel, which would reduce or even stop the discharge of filtrate. By setting a limiting groove, a pressing block and a limiting block, it is convenient to clean and replace the installed filter screen after a period of use.

[0015] 2. This utility model guides the flow of filtrate placed inside the cylinder by installing a first guide plate and a second guide plate in the inner cavity. This causes the filtrate to flow at an angle toward the filter screen, thereby flushing away the insoluble matter and crystals filtered out on the filter screen and maintaining the filtration effect of the filter screen. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of a three-dimensional cross-section of a portion of this utility model.

[0018] Figure 2 This is a schematic diagram of the three-dimensional two-part cross-section of this utility model.

[0019] Figure 3 This is a schematic diagram of a cross-section of the front view of this utility model.

[0020] Figure 4 This is a utility model Figure 1 A schematic diagram of the central flow guide component.

[0021] Figure 5 This is a utility model Figure 1 A magnified schematic diagram of part A in the middle.

[0022] Figure 6 This is a utility model Figure 3 A schematic diagram of the filter screen.

[0023] Figure label:

[0024] 1-Cylinder body; 2-Inner cavity; 3-Sealing cap; 4-Sealing plug; 5-Sealing ring; 6-Mounting groove; 7-Liquid outlet channel; 8-Liquid outlet valve; 9-Liquid inlet channel; 10-Back pressure pipe; 11-Flow guide assembly; 111-First flow guide plate; 112-Second flow guide plate; 113-Lower liquid hole; 12-Limiting groove; 13-Clamping block; 14-Slope; 15-Annular frame; 16-Filter screen; 17-Limiting block; 18-Pushing block; 19-Gas pressure relief valve. Detailed Implementation

[0025] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The detailed description of the embodiments will make this clear. All references to the following embodiments are made with reference to the accompanying drawings.

[0026] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] This utility model is a high temperature and high pressure filtrate receiver. In the existing filtrate receiver, the filtrate is discharged into the cylinder 1 during use. After the pressure is released from the cylinder 1 through the pressure relief valve, the filtrate is released through the liquid outlet valve 8.

[0028] When the filtrate is discharged through the outlet channel 7, the high temperature and pressure cause insoluble substances and crystals carried by the filtrate to accumulate in the outlet channel 7, which leads to blockage of the outlet channel 7, and the outlet valve 8 cannot be used normally, resulting in a reduction or even cessation of the filtrate discharge.

[0029] As one embodiment, this utility model includes a cylindrical body 1 with an inner cavity 2. A sealing cap 3 is threaded onto the bottom of the cylindrical body 1, and the sealing cap 3 is in contact with the bottom of the cylindrical body 1. A sealing plug 4 is fixedly connected to the top of the sealing cap 3. The top of the sealing plug 4 is conical, and the bottom of the cylindrical body 1 has a conical recess for better fit with the sealing plug 4. The sealing plug 4 is located in the inner cavity 2 of the cylindrical body 1 and fits into the inner cavity 2. An annular sealing ring 5 is provided between the sealing plug 4 and the inner wall of the cylindrical body 1. A liquid inlet channel 9 is opened at the top of the inner wall of the cylindrical body 1. A circular mounting groove 6 is provided on the side of the cylinder 1. A detachable annular frame 15 is installed in the mounting groove 6. The outer wall of the annular frame 15 matches the shape and size of the inner wall of the mounting groove 6 so that it can be inserted and positioned, thereby allowing the installed filter screen 16 to better filter the filtrate. The filter screen 16 is fixedly connected in the annular frame 15. A liquid outlet channel 7 is provided at the bottom of the mounting groove 6. A gas pressure relief valve 19 is provided on one side of the cylinder 1. When the filtrate is released, the pressure inside the cylinder 1 is first relieved by the gas pressure relief valve 19. The input end of the gas pressure relief valve 19 is connected to the inner cavity 2.

[0030] In this embodiment, by twisting the sealing cap 3, the sealing plug 4 on the sealing cap 3 enters the bottom of the cylinder 1. As the sealing plug 4 gradually enters the cylinder 1, it adheres to the inner wall of the cylinder 1 until the sealing cap 3 contacts the bottom of the cylinder 1, and the conical surface at the top of the sealing plug 4 contacts the conical recess at the bottom of the cylinder 1, so that the sealing plug 4 and the conical interface recess at the bottom of the cylinder 1 are pressed together, thereby squeezing the sealing ring 5 located between the side wall of the sealing plug 4 and the inner wall of the cylinder 1, thereby sealing the cylinder 1. After installation, the filtrate enters the cylinder 1. When it is necessary to release the filtrate, the operator twists the gas pressure relief valve 19 to release the pressure inside the cylinder 1, which facilitates the subsequent discharge of the filtrate. When the flow rate of the liquid outlet valve 8 decreases, the sealing cap 3 is removed from the bottom of the cylinder 1, and the filter screen 16 is taken out to clean the blockage on the filter screen 16 to prevent the blockage from entering the liquid outlet channel 7 and causing blockage to the liquid outlet valve.

[0031] As an example, both sides of the mounting groove 6 are provided with "L"-shaped limiting grooves 12. The bottom of each limiting groove 12 is fixedly connected with a clamping block 13. The clamping block 13 is used to clamp the sliding limiting block 17. Both clamping blocks 13 are provided with a ramp 14 on the side facing the sliding direction of the limiting block 17, so that the limiting block 17 can move smoothly to the top of the limiting block 17 when sliding. Both sides of the annular frame 15 are fixedly connected with limiting blocks 17. The two limiting blocks 17 are slidably connected in the two limiting grooves 12 respectively. The two clamping blocks 13 respectively clamp and fix the limiting blocks 17 located in the corresponding limiting grooves 12. Both sides of the top of the annular frame 15 are connected with pushing blocks 18.

[0032] In this embodiment, when installing the filter screen, the operator places the annular frame 15 into the installation groove 6. The limiting blocks 17 on both sides of the annular frame 15 slide into the limiting grooves 12 at the top of the two limiting grooves 12. After the two limiting blocks 17 slide to the bottom of the limiting grooves 12, the pushing block 18 pushes the annular frame 15, causing the annular frame 15 to rotate in the installation groove 6. The two limiting blocks 17 slide along the rotation direction of the annular frame 15 in the two limiting grooves 12, pass through the ramps 14 on the two clamping blocks 13, and enter between the limiting grooves 12 and the clamping blocks 13 to fix the annular frame 15. This allows the filter screen 16 to cover the inlet of the liquid outlet channel 7 for filtration, filtering the filtrate when it is discharged.

[0033] As an example, a flow guiding assembly 11 is provided on both sides of the inner cavity 2. The flow guiding assembly 11 includes a first flow guiding plate 111 and a second flow guiding plate 112, forming a V-shaped structure with the opening facing the center of the inner cavity 2. It guides the filtrate entering the liquid inlet channel 9. One end of the first flow guiding plate 111 and the second flow guiding plate 112 are connected, and the connecting part is fixedly connected to the side wall of the inner cavity 2. A liquid discharge hole 113 is provided on the first flow guiding plate 111. The liquid discharge hole 113 is trapezoidal, so that the filtrate passing through the top of the first flow guiding plate 111 falls down and contacts the upper surface of the second flow guiding plate 112. The first flow guiding plate 111 and the second flow guiding plate 112 extend in opposite directions from the connecting part, forming a V-shaped structure with the opening facing the center of the inner cavity 2. The first flow guiding plate 111 is inclined upward in the radial direction towards the axis of the cylinder 1 from the connecting part, and the second flow guiding plate 112 is inclined downward in the radial direction towards the axis of the cylinder 1 from the connecting part.

[0034] In this embodiment, the filtrate entering the cylinder 1 falls onto the top of the first guide plate 111 during its descent. It then slides towards the inner wall of the inner cavity 2 through the first guide plate 111 and is discharged through the drain hole 113 on the first guide plate 111. The filtrate falls downward onto the second guide plate 112 through the drain hole 113. After being guided by the second guide plate 112 at an angle, the filtrate washes against the filter screen 16, thereby cleaning the insoluble matter and crystals filtered out on the filter screen 16, so that the filter screen 16 can remain unobstructed and maintain its filtering effect.

[0035] As an example, the other end of the liquid inlet channel 9 passes through the cylinder 1 and is located on one side of the cylinder 1. A back pressure pipe 10 is fixedly connected to the top of one side of the cylinder 1. The back pressure pipe 10 is connected to the liquid inlet channel 9. The liquid outlet channel 7 passes through the sealing plug 4 and the sealing cover 3 and is located on one side of the sealing cover 3. A liquid outlet valve 8 is fixedly connected to the bottom side of the sealing cover 3. The liquid outlet valve 8 is connected to the liquid outlet channel 7.

[0036] In this embodiment, the filtrate is put into the cylinder 1 through the back pressure pipe 10. When it is necessary to discharge the filtrate, the pressure inside the cylinder 1 is released, and the outlet valve 8 is opened so that the filtered filtrate is discharged through the outlet channel 7 at the outlet valve 8.

[0037] Working principle of this utility model:

[0038] In use, the filter is connected to the filter testing equipment via the back pressure pipe 10. When the filter needs to be released for collection and testing, the filter enters the cylinder 1 through the inlet channel 9. When the operator needs to release the filter, the gas pressure relief valve 19 is opened to release the pressure inside the cylinder 1. After the pressure is released, the filter is released by opening the outlet valve 8.

[0039] The filtrate is filtered through the filter screen 16 installed in the installation tank 6 to prevent insoluble matter and crystals carried in the filtrate from entering the outlet channel 7 and causing blockage in the outlet channel 7. When the filtrate enters the cylinder 1, the filtrate is guided by the first guide plate 111 and the second guide plate 112, so that the filtrate flows towards the filter screen 16 at an angle to clean the filter screen 16.

[0040] When the filter screen 16 needs to be cleaned or replaced, the staff removes the sealing cover 3, and rotates the push block 18 to make the annular frame 15 rotate in the mounting groove 6. After the limiting block 17 slides to the other side in the limiting groove 12, the annular frame 15 can be taken out in the mounting groove 6, so that the filter screen 16 can be cleaned or replaced.

[0041] The present invention has the following technical effects.

[0042] 1. This utility model filters the filtrate entering the outlet channel 7 by setting a filter screen 16 on the sealing plug head 4, so that the insoluble matter and crystals carried by the filtrate are filtered out and the filtrate can be discharged smoothly. This effectively avoids the accumulation of insoluble matter and crystals carried by the filtrate in the outlet channel 7, which would reduce or even stop the discharge of filtrate. By setting a limiting groove 12, a pressing block 13 and a limiting block 17, it is convenient to clean and replace the installed filter screen 16 after a period of use.

[0043] 2. This utility model guides the filtrate placed in the cylinder 1 by installing a first guide plate 111 and a second guide plate 112 in the inner cavity 2, so that the filtrate flows obliquely toward the filter screen 16, thereby flushing the insoluble matter and crystals filtered out on the filter screen 16, so that the filter screen 16 can maintain unobstructed flow and filtration effect.

[0044] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be obvious to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A high-temperature, high-pressure filtrate receiver, comprising a cylindrical body (1), wherein the cylindrical body (1) is provided with an inner cavity (2), characterized in that, A sealing cap (3) is installed at the bottom of the cylinder (1), and a sealing plug (4) is fixedly connected to the top of the sealing cap (3). The sealing plug (4) is located in the inner cavity (2) of the cylinder (1) and cooperates with the inner cavity (2). A sealing ring (5) is provided between the sealing plug (4) and the inner wall of the cylinder (1). A liquid inlet channel (9) is provided at the top of the inner wall of the cylinder (1). An installation groove (6) is opened at the top of the sealing plug (4). A detachable annular frame (15) is installed in the installation groove (6). A filter screen (16) is fixedly connected in the annular frame (15). A liquid outlet channel (7) is opened at the bottom of the installation groove (6). A gas pressure relief valve (19) is installed on one side of the cylinder (1). The input end of the gas pressure relief valve (19) is connected to the inner cavity (2).

2. The high-temperature and high-pressure filtrate receiver according to claim 1, characterized in that, The mounting groove (6) has an "L"-shaped limiting groove (12) on both sides. The bottom of the two limiting grooves (12) is fixedly connected to a clamping block (13), and a ramp (14) is provided on one side of the two clamping blocks (13).

3. A high-temperature, high-pressure filtrate receiver according to claim 2, characterized in that, Limiting blocks (17) are fixedly connected to both sides of the annular frame (15). The two limiting blocks (17) are slidably installed in the two limiting grooves (12). The two pressing blocks (13) press and fix the limiting blocks (17) located in the corresponding limiting grooves (12). Pushing blocks (18) are connected to both sides of the top of the annular frame (15).

4. A high-temperature, high-pressure filtrate receiver according to claim 1, characterized in that, Both sides of the inner cavity (2) are provided with flow guiding components (11). The flow guiding components (11) include a first flow guiding plate (111) and a second flow guiding plate (112). One end of the first flow guiding plate (111) and the second flow guiding plate (112) are connected together, and the connecting part is fixedly connected to the side wall of the inner cavity (2). The first flow guiding plate (111) is provided with a liquid discharge hole (113).

5. A high-temperature, high-pressure filtrate receiver according to claim 4, characterized in that, The first guide plate (111) and the second guide plate (112) extend in opposite directions from the connecting part, forming a V-shaped structure with the opening facing the center of the inner cavity (2). The first guide plate (111) is inclined upward in the radial direction towards the axis of the cylinder (1) from the connecting part, and the second guide plate (112) is inclined downward in the radial direction towards the axis of the cylinder (1) from the connecting part.

6. A high-temperature, high-pressure filtrate receiver according to claim 1, characterized in that, The other end of the liquid inlet channel (9) passes through the cylinder (1) and is located on one side of the cylinder (1). A back pressure pipe (10) is fixedly connected to the top of one side of the cylinder (1). The back pressure pipe (10) is connected to the liquid inlet channel (9). The liquid outlet channel (7) passes through the sealing plug (4) and the sealing cover (3) and is located on one side of the sealing cover (3). A liquid outlet valve (8) is fixedly connected to one side of the bottom of the sealing cover (3). The liquid outlet valve (8) is connected to the liquid outlet channel (7).

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