Sampling and pressure tapping multifunctional integrated valve for rod-pumped well

Abstract

The utility model relates to the technical field of oil production well equipment, in particular to a multifunctional integrated valve for sampling and pressure taking of a rod-pumped well, which comprises a valve main body, a connector, a gland, a sealing ball seat, a spherical screw rod, a quick-opening valve and a pressure gauge. The valve body is of a hollow cylindrical structure, a connector and a gland are arranged at the left end of the valve body, a sealing ball seat is arranged in the middle of the valve body, a spherical lead screw is arranged in the sealing ball seat, a pressure gauge is arranged at the upper end of the valve body, and a quick-opening valve is arranged at the lower end of the valve body. According to the multifunctional integrated valve for sampling and pressure taking of the rod-pumped well, needle type sealing of a traditional needle type valve is changed into spherical contact sealing of the spherical lead screw, so that the sealing performance is improved, the service life is prolonged, and the spherical lead screw is changed from outward retreating to inward retreating when the sampling valve is opened through the special lead screw structure; attached impurities are pushed into a pipeline to prevent blockage and impurities such as sand and wax from directly entering an oil flow channel, the quick-opening valve can easily discharge residual oil after sampling, smoothness of the oil flow channel is guaranteed, dead oil and wax deposition are reduced, the sampling freezing blockage phenomenon is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production well equipment, in particular to a multi-functional integrated valve for sampling and pressure taking of pumping wells. Background Art

[0002] During the oil extraction process, the sampling and pressure taking operations of oil production wells are important links for monitoring and evaluating downhole conditions. There are some problems in the design and use of the current needle valves, which affect the accuracy of sampling and pressure taking, as well as the maintenance and replacement of equipment;

[0003] The needle valve in the prior art has the following problems during the sampling process: when the needle valve is opened for sampling, the lead screw will withdraw outwards, and this action will cause the dead oil attached to the bottom of the needle valve to be discharged together with the oil sample under the action of the pipeline pressure. Since dead oil is usually a heavier oil component and its properties are different from those of normal oil samples, the mixing of dead oil will cause errors in the sampling test results and affect the accurate judgment of the downhole reservoir conditions;

[0004] The needle valve in the prior art has the following problems during the pressure taking process: the pressure taking joint of the oil production well is usually located outside the oil pipe connection pipeline. Such an arrangement makes it easy for dead oil to accumulate at the pressure taking joint. Especially in the low-temperature environment in winter, the viscosity of dead oil increases, making it easier to cause inaccurate pressure taking values and even may cause damage to equipment such as pressure gauges. This not only affects the reliability of pressure data but also increases the equipment maintenance cost;

[0005] In addition, the welding design of the needle valve seat also brings certain inconveniences during maintenance. When the valve seat needs to be replaced, due to the use of welding fixation, complex cutting and welding operations must be carried out, which not only takes time and effort but also may damage the surrounding equipment and pipelines, increasing the difficulty and risk of maintenance. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] The utility model provides a multi-functional integrated valve for sampling and pressure taking of pumping wells to overcome the problem that when the needle valve in the prior art is used for sampling, the dead oil at the bottom of the valve is discharged together with the oil sample under the action of the pipeline pressure, resulting in errors in the sampling test.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the utility model provides a multi-functional integrated valve for sampling and pressure taking of pumping wells, including: a valve body;

[0010] The valve body is a hollow cylindrical structure, and a connector and a gland are respectively arranged at the left end of the valve body;

[0011] The gland is provided on the outer wall of the left end of the valve body, and the left end of the gland is threadedly connected to the connector;

[0012] A sealing ball seat is provided in the middle of the valve body. The sealing ball seat is a hollow frustum structure and is integrally formed with the valve body;

[0013] An annular step extending inward is provided at the right end of the valve body. The inner wall of the annular step is provided with a thread. A spherical lead screw is provided in the sealing ball seat. The spherical lead screw is composed of two parts. The left end of the spherical lead screw is a spherical structure and the right end is a cylindrical structure;

[0014] The outer wall of the cylindrical structure at the right end of the spherical lead screw is provided with a thread, and an annular step extending outward is provided at the left end of the thread;

[0015] A pressure gauge is provided at the upper end of the valve body, and a quick-opening valve is provided at the lower end of the valve body. The pressure gauge and the quick-opening valve are both provided at the right end of the sealing ball seat.

[0016] Preferably, two outer-ring annular steps are respectively provided on the outer wall of the left end of the valve body. The two annular steps include: a first step and a second step.

[0017] Preferably, the first step is provided at the left end of the second step. The first step limits the right end of the connector, and the second step limits the right end of the gland.

[0018] Preferably, the inner wall of the sealing ball seat and the outer wall of the left end of the spherical lead screw are matched in size, and the left end of the spherical lead screw can completely seal the sealing ball seat.

[0019] Preferably, the annular step provided on the outer wall of the spherical lead screw limits the thread at the right end of the spherical lead screw.

[0020] Preferably, the thread provided on the outer wall of the cylindrical structure at the right end of the spherical lead screw is matched with the thread on the inner wall of the annular step at the right end of the valve body, and the spherical lead screw can axially rotate and move in the valve body.

[0021] Preferably, the pressure gauge is in communication with the inside of the valve body, and the pressure gauge is threadedly connected to the valve body.

[0022] Preferably, the quick-opening valve is a rotary quick-opening valve. The quick-opening valve is obliquely provided at 45° on the outer wall of the valve body. The quick-opening valve is in communication with the inside of the valve body, and the quick-opening valve is threadedly connected to the valve body.

[0023] (III) Beneficial effects

[0024] The utility model provides a multi-functional integrated valve for sampling and pressure taking in a pumping unit well, which can realize changing the needle-shaped seal of the traditional needle valve into the spherical contact seal of a spherical screw rod, improving the sealing performance and service life of the device. By designing a special screw rod structure, when the sampling valve is opened, the spherical screw rod changes from retracting outwards to advancing inwards, effectively pushing impurities such as dead oil, dust and sand, and wax attached to the outer wall of the spherical screw rod into the pipeline, avoiding the problem of these impurities blocking the sampling channel. A quick-opening valve is added at the lower part of the valve body to easily discharge the residual oil after sampling, ensuring the smoothness of the oil flow channel, avoiding the deposition of dead oil and wax in the oil flow channel, thereby reducing the occurrence of sampling freezing and blockage phenomena, and achieving the purpose of reducing the maintenance workload and extending the service life of the equipment. Brief Description of the Drawings

[0025] Figure 1 Fig. shows the structural schematic diagram of a multi-functional integrated valve for sampling and pressure taking in a pumping unit well of the present utility model.

[0026] Wherein: 1: spherical screw rod; 2: valve body; 3: sealing ball seat; 4: connector; 5: gland; 6: quick-opening valve; 7: pressure gauge. Detailed Embodiment

[0027] The present utility model will be described in detail below with reference to the drawings and embodiments.

[0028] In the description of the present utility model, it is necessary to understand that the orientation or positional relationship indicated by "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", etc. is all based on the orientation or positional relationship shown in the drawings. The purpose is only to facilitate the description of the present utility model and simplify the description, and does not indicate or imply that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0029] As Figure 1 shown, the present utility model provides a multi-functional integrated valve for sampling and pressure taking in a pumping unit well, including: valve body 2;

[0030] The valve body 2 is a hollow cylindrical structure. The valve body 2 is used to accommodate and connect other components. The left end of the valve body 2 is respectively provided with a connector 4 and a gland 5. The gland 5 is arranged on the outer wall of the left end of the valve body 2. The left end of the gland 5 is threadedly connected to the connector 4. The outer wall of the left end of the valve body 2 is respectively provided with two outer-ring stepped portions. The two stepped portions include: a first step and a second step. The first step is arranged at the left end of the second step. The first step limits the right end of the connector 4, and the second step limits the right end of the gland 5. The two stepped portions ensure that the connector 4 and the gland 5 will not move or loosen unnecessarily during the working process;

[0031] The middle of the valve body 2 is provided with a sealing ball seat 3. The sealing ball seat 3 is a hollow frustum structure. The sealing ball seat 3 can effectively increase the contact area with the spherical lead screw 1, thereby improving the sealing performance. The sealing ball seat 3 is integrally formed with the valve body 2, enhancing the structural stability of the entire device and reducing sealing problems caused by component loosening or displacement. The right end of the valve body 2 is provided with an inward-extending annular step, and the inner wall of the annular step is provided with a thread;

[0032] The spherical lead screw 1 is arranged in the sealing ball seat 3. The design of the spherical lead screw 1 cleverly solves the problems of blockage and poor sealing that easily occur in the traditional sampling valve during use. By designing the spherical lead screw 1 in the form of a spherical structure at the left end and a cylindrical structure at the right end, the spherical lead screw 1 can effectively push the impurities in the pipeline during rotational movement, ensuring the smoothness of the oil flow channel. The outer wall of the cylindrical structure at the right end of the spherical lead screw 1 is provided with a thread, and an outward-extending annular step is provided at the left end of the thread. The annular step provided on the outer wall of the spherical lead screw 1 limits the thread at the right end of the spherical lead screw 1. The thread provided on the outer wall of the cylindrical structure at the right end of the spherical lead screw 1 matches the thread on the inner wall of the annular step at the right end of the valve body 2. The spherical lead screw 1 can axially rotate and move in the valve body 2. The thread causes the movement of the spherical lead screw 1 to change from outward retraction to inward advancement. The inner wall of the sealing ball seat 3 matches the outer wall size of the left end of the spherical lead screw 1, and the left end of the spherical lead screw 1 can completely seal the sealing ball seat 3, ensuring that no impurities enter the oil flow sampling channel during use and affecting the sampling result. When opening the sampling and pressure-taking multi-functional integrated valve of the pumping well for sampling, the spherical seal of the spherical lead screw 1 will push impurities such as dead oil, dust, and wax attached to it into the pipeline. At the same time, the oil flow channel is opened, and clean oil enters the oil flow sampling channel. This unique movement method can effectively prevent the secondary deposition of impurities during the sampling process, further improving the purity and reliability of the sampling;

[0033] A pressure gauge 7 is provided at the upper end of the valve body 2, and a quick-opening valve 6 is provided at the lower end of the valve body 2. Both the pressure gauge 7 and the quick-opening valve 6 are provided at the right end of the sealing ball seat 3. The pressure gauge 7 is internally connected to the valve body 2 and is threadedly connected to the valve body 2. The pressure gauge 7 is used to monitor the internal pressure of the valve in real time to ensure the safety and reliability of the sampling process. The quick-opening valve 6 is a rotary quick-opening valve. The quick-opening valve 6 is obliquely arranged at 45° on the outer wall of the valve body 2 and is internally connected to the valve body 2. The quick-opening valve 6 is threadedly connected to the valve body 2. This connection method is not only convenient for installation and disassembly but also ensures the sealing performance of the connection. The design of the quick-opening valve 6 enables the residual oil in the valve body 2 to be drained after the sampling work is completed by closing the spherical lead screw 1 and opening the quick-opening valve 6, ensuring the smoothness of the oil flow channel and avoiding the deposition of dead oil and wax in the oil flow channel, causing the occurrence of sampling freeze blockage.

[0034] The actual working scenario of a multi-functional integrated valve for sampling and pressure taking in a pumping unit well is introduced in detail below.

[0035] In the actual application process, the multi-functional integrated valve for sampling and pressure taking in a pumping unit well includes the following steps:

[0036] Step S1: Install the multi-functional integrated valve for sampling and pressure taking in a pumping unit well at an appropriate position, ensuring that the connection between the integrated valve and the wellhead equipment is firm and well-sealed. After installation, check whether the pressure gauge 7 is working properly to ensure that the internal pressure of the valve can be monitored in real time;

[0037] Step S2: Open the spherical screw rod 1 and rotate the spherical screw rod 1 to the open position to ensure that the oil flow channel is unobstructed. Check the quick-opening valve 6 to ensure that the quick-opening valve 6 is in the closed state to prevent oil leakage;

[0038] Step S3: Slowly rotate the spherical screw rod 1 to open the sampling valve to allow the oil to enter the oil flow sampling channel

[0039] It can be understood that for the above-mentioned various embodiments mentioned in the present invention, without violating the principle logic, they can be combined with each other to form a combined embodiment. Due to space limitations, the present invention will not be elaborated further.

[0040] Those skilled in the art can understand that in the above method of the specific implementation manner, the writing order of each step does not mean a strict execution order that constitutes any limitation to the implementation process. The specific execution order of each step should be determined according to its function and possible internal logic.

[0041] A multi-functional integrated valve for sampling and pressure taking in a pumping unit well provided by the present invention changes the needle-shaped seal of the traditional needle valve to a spherical contact seal of the spherical screw rod 1, improving the sealing performance and service life of the device. By designing a special screw rod structure, when the sampling valve is opened, the spherical screw rod 1 changes from retracting outward to advancing inward, effectively pushing the dead oil, dust, sand, wax and other impurities attached to the outer wall of the spherical screw rod 1 into the pipeline, avoiding the problem of these impurities blocking the sampling channel. A quick-opening valve 5 is added to the lower part of the valve body 2, which can easily discharge the residual oil after sampling, ensuring the smoothness of the oil flow channel, avoiding the deposition of dead oil and wax in the oil flow channel, thereby reducing the occurrence of sampling freezing and blocking phenomena, and thus achieving the purpose of reducing the maintenance workload and extending the service life of the equipment.

[0042] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A multi-functional integrated valve for sampling and pressure taking in a pumping well, characterized in that, Comprising: A valve body (2); The valve body (2) is a hollow cylindrical structure. A connector (4) and a gland (5) are respectively provided at the left end of the valve body (2); The gland (5) is provided on the outer wall at the left end of the valve body (2), and the left end of the gland (5) is threadedly connected to the connector (4); A sealing ball seat (3) is provided in the middle of the valve body (2). The sealing ball seat (3) is a hollow frustum structure and is integrally formed with the valve body (2); An annular step extending inward is provided at the right end of the valve body (2). The inner wall of the annular step is provided with a thread. A spherical lead screw (1) is provided in the sealing ball seat (3). The spherical lead screw (1) consists of two parts. The left end of the spherical lead screw (1) is a spherical structure, and the right end is a cylindrical structure; A thread is provided on the outer wall of the cylindrical structure at the right end of the spherical lead screw (1), and an annular step extending outward is provided to the left of the thread; A pressure gauge (7) is provided at the upper end of the valve body (2), and a quick-opening valve (6) is provided at the lower end of the valve body (2). The pressure gauge (7) and the quick-opening valve (6) are both provided at the right end of the sealing ball seat (3).

2. The sampling and pressure-taking multi-functional integrated valve for pumping wells according to claim 1, characterized in that Two circumferential steps with outer edges are respectively provided on the outer wall at the left end of the valve body (2). The two circumferential steps include: a first step and a second step.

3. The sampling and pressure-taking multi-functional integrated valve for pumping wells according to claim 2, characterized in that, The first step is provided at the left end of the second step. The first step limits the right end of the connector (4), and the second step limits the right end of the gland (5).

4. The sampling and pressure-taking multi-functional integrated valve for pumping wells according to claim 1, characterized in that, The inner wall of the sealing ball seat (3) and the outer wall of the left end of the spherical lead screw (1) are of matching dimensions, and the left end of the spherical lead screw (1) can completely seal the sealing ball seat (3).

5. The sampling and pressure-taking multi-functional integrated valve for pumping wells according to claim 1, characterized in that The annular step provided on the outer wall of the spherical lead screw (1) limits the thread at the right end of the spherical lead screw (1).

6. The sampling and pressure-taking multi-functional integrated valve for pumping wells according to claim 5, characterized in that, The thread provided on the outer wall of the cylindrical structure at the right end of the spherical lead screw (1) matches the thread on the inner wall of the annular step at the right end of the valve body (2), and the spherical lead screw (1) can axially rotate and move in the valve body (2).

7. The sampling and pressure-taking multifunctional integrated valve for pumping wells according to claim 1, characterized in that, The pressure gauge (7) is in communication with the inside of the valve body (2), and the pressure gauge (7) is threadedly connected to the valve body (2).

8. The sampling and pressure-taking multifunctional integrated valve for pumping wells according to claim 1, characterized in that, The quick-opening valve (6) is a rotary quick-opening valve. The quick-opening valve (6) is obliquely provided at 45° on the outer wall of the valve body (2). The quick-opening valve (6) is in communication with the inside of the valve body (2), and the quick-opening valve (6) is threadedly connected to the valve body (2).

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