Multifunctional oil production wellhead device

Abstract

The utility model discloses a multifunctional oil production wellhead device which comprises a casing tee joint, the lower end of the casing tee joint is connected with a wellhead, the upper end of the casing tee joint is connected with a first tee joint through a flange, and the side face of the first tee joint is connected with a water content analyzer. The other end of the water content analyzer is connected with a pressure three-way head through a first union, and the pressure three-way head is also connected with a four-way head; the side face of the casing pipe three-way head is connected with a working fluid level on-line automatic tester through a second three-way head, the second three-way head is further connected with a constant-pressure deflation valve through an air inlet hose, and the upper portion of the constant-pressure deflation valve is connected with a four-way head. According to the utility model, the liquid level change in the oil extraction wellhead and the water content in the oil-gas-water mixture can be detected in real time, so that an engineer can timely know the change trend of the oil-gas yield, the oil extraction process parameters can be conveniently and timely adjusted, and the oil-gas recovery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production wellheads, and particularly relates to a multifunctional oil production wellhead device. Background Art

[0002] Oil production refers to various engineering and technical measures taken according to development objectives during the oilfield exploitation process, which is the process of extracting petroleum buried in underground oil reservoirs to the ground through various technological methods, including the operation of production wells and injection wells. This process involves multiple stages and various technical means, mainly including natural flow production method, artificial lift method, etc. The oil production wellhead plays a crucial role in the oil extraction process. Its main function is to connect surface facilities with downhole tubing to ensure the smooth production of crude oil from underground oil reservoirs and its transportation to the ground. Specifically, the oil production wellhead device includes three parts: a casing head, a tubing head, and a Christmas tree body. The oil production wellhead device plays a key role under different types of oil production methods and conditions. Its design directly affects the production efficiency and safety of the oilfield. Functional upgrading of the oil production wellhead device can effectively improve oil production efficiency, reduce production costs, and ensure the safety of oil wells.

[0003] The utility model patent with the patent announcement number CN217001763U discloses a multifunctional connection device for an oil production wellhead, including a check valve, and also provided with an external device connection mechanism and a data acquisition mechanism. The external device connection pipe in the external device connection mechanism can be threadedly connected to the production valve of the wellhead through a double male joint one, and can be connected to the multifunctional acquisition pipe in the data acquisition mechanism through a double male joint two; the multifunctional acquisition pipe is threadedly connected to the check valve through a double male joint three and can be bolted to the backpressure valve of the wellhead through the check valve. At the same time, the temperature and pressure transmitter installed in this device prevents the occurrence of data acquisition distortion, and does not affect the connection and installation of external devices. However, when this structure is actually used, it cannot monitor the dynamic liquid level of the oil production wellhead and the water content in the oil-gas-water mixture inside the oil production wellhead in real time, resulting in engineers being unable to grasp the change trend of oil and gas production, so that engineers cannot change the oil production process parameters in a timely manner, reducing the oil and gas recovery rate. Therefore, a multifunctional oil production wellhead device is proposed now. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multifunctional oil production wellhead device to overcome the deficiency that engineers in the prior art cannot timely grasp the change trend of oil and gas production.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multifunctional oil production wellhead device includes a casing three-way head. The lower end of the casing three-way head is connected to the wellhead, and the upper end is connected to a first three-way head through a flange. An aqueous analyzer is connected to the side of the first three-way head; the other end of the aqueous analyzer is connected to a pressure three-way head through a first union. The pressure three-way head is also connected to a four-way head; the side of the casing three-way head is connected to a dynamic liquid level on-line automatic tester through a second three-way head. The second three-way head is also connected to a constant pressure gas release valve through an intake hose, and the upper part of the constant pressure gas release valve is connected to the four-way head. When the oil-gas-water mixture flows into the oil production wellhead, the liquid level will rise or fall accordingly. The liquid level change data collected by the sensor in the dynamic liquid level on-line automatic tester can be used to calculate information such as the oil-gas production and water cut of the oil production wellhead. The constant pressure gas release valve can stabilize the pressure of the oil production wellhead and ensure the normal operation of the oil production project. During the oil production process, the mixed oil-gas-water enters the first three-way head from the short connecting pipe and then enters the aqueous analyzer. The aqueous analyzer monitors the water content in the oil-gas-water mixture at the oil production wellhead in real time, helping engineers master the change trend of the oil-gas production and timely adjust the oil production process parameters to improve the oil-gas recovery rate. In addition, the aqueous analyzer monitors the pressure and flow rate of the oil production wellhead and provides data support for the oil production project.

[0007] Further, the lower part of the constant pressure gas release valve is connected to a produced fluid discharge pipe through a second union. The produced fluid discharge pipe includes a first double-wire connecting pipe. The lower part of the first double-wire connecting pipe is connected to a first single-wire connecting pipe through a third gate valve. The oil-gas-water mixture is discharged from here.

[0008] Further, a spare drain pipe is also arranged on the right side of the four-way head. The spare drain pipe is connected to the four-way head through a second double-wire connecting pipe; the spare drain pipe includes a third three-way head. The lower part of the third three-way head is connected to a third double-wire connecting pipe. The lower part of the third double-wire connecting pipe is connected to a fourth double-wire connecting pipe through a third union. The lower part of the fourth double-wire connecting pipe is successively connected to a fourth gate valve and a second single-wire connecting pipe.

[0009] Further, a valve connecting pipe is welded to the side of the third three-way head. The valve connecting pipe is connected to a right-angle pipe through a fourth stop valve.

[0010] Further, a first pipe plug is installed at the top of the four-way head, and a second pipe plug is installed at the top of the third three-way head.

[0011] Further, a second stop valve is installed on the pressure three-way head. A second pressure gauge is installed on the second stop valve. A second gasket is installed between the second stop valve and the second pressure gauge. After the produced fluid detected by the tax-inclusive analyzer is pressure-tested again at the second pressure gauge, it can be discharged from the right-angle pipe for sampling.

[0012] Further, a third stop valve is installed between the second three-way joint and the intake hose. One end of the third stop valve is connected to the second three-way joint, and the other end is connected to the intake hose.

[0013] Further, a first stop valve is installed between the second three-way joint and the intake hose. One end of the first stop valve is connected to the second three-way joint, and a first pressure gauge is installed at the other end. A first gasket is installed between the first stop valve and the first pressure gauge. The first pressure gauge can monitor the pressure and flow rate of the oil production wellhead, providing data support for oil production engineering.

[0014] Further, a lower flange is installed at the top of the casing three-way joint, an upper flange is sleeved at the bottom of the first three-way joint, a short connecting pipe is inserted at the bottom of the upper flange, the bottom of the short connecting pipe is inserted into the upper end of the casing three-way joint, a gasket ring is arranged between the lower flange and the upper flange, and the lower flange and the upper flange are tightly connected by bolts.

[0015] Further, the first three-way joint and the water cut analyzer are connected through a first gate valve, the second three-way joint and the dynamic liquid level on-line automatic tester are connected through a second gate valve, and the single-wire connecting pipe and the first double-wire connecting pipe are connected through a third gate valve.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] A multifunctional oil production wellhead device provided by the utility model adds a water cut analyzer and a dynamic liquid level on-line automatic tester to the existing oil production wellhead device, so as to realize the real-time monitoring of the water content in the oil-gas-water mixture and the liquid level change in the oil production wellhead. By detecting the liquid level change in the oil production wellhead and the water content in the oil-gas-water mixture in real time, engineers can timely understand the change trend of oil and gas production, improve the control ability of engineers over the production status of the oil and gas field, quickly respond to production changes, adjust process parameters to ensure the stable growth of oil and gas production, improve the overall efficiency of the oil and gas field, and carry out safe oil production on this basis to prevent oil production from spraying out, which is of great significance for ensuring production safety. At the same time, this dynamic adjustment mechanism can not only effectively prevent oil production spraying accidents caused by improper pressure, protect the operation site and the surrounding environment from pollution, but also significantly improve the oil and gas recovery rate and optimize resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a multifunctional oil production wellhead device in an embodiment of the utility model.

[0019] In the figure, 1 is a casing tee, 2 is a short connecting pipe, 3 is a lower flange, 4 is a nut, 5 is a stud, 6 is a gasket ring, 7 is an upper flange, 8 is a third double-threaded connecting pipe, 9 is a fourth double-threaded connecting pipe, 10 is a first tee, 11-1 is a first single-threaded connecting pipe, 11-2 is a second single-threaded connecting pipe, 12 is a second tee, 13-1 is a first gate valve, 13-2 is a second gate valve, 13-3 is a third gate valve, 13-4 is a fourth gate valve, 14-1 is a first globe valve, 14-2 is a second globe valve, 14-3 is a third globe valve, 14-4 is a fourth globe valve, 15-1 is a first pressure gauge, 15-2 is a second pressure gauge, 16-1 is a first gasket, 16-2 is a second gasket, 17 is a first double-threaded connecting pipe, 18-1 is a first union, 18-2 is a second union, 18-3 is a third union, 19 is a constant pressure air release valve, 20 is a four-way head, 21 is a pressure tee, 22 is a water content analyzer, 23-1 is a first plug, 23-2 is a second plug, 24 is a second double-threaded connecting pipe, 25 is a third tee, 26 is a valve connecting pipe, 27 is a right-angle pipe, 28 is an intake hose, 29 is a dynamic liquid level on-line automatic tester. Specific embodiments

[0020] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] Embodiment 1:

[0023] As Figure 1The following is a schematic diagram of the overall structure of a multi-functional oil production wellhead device in this embodiment, including a casing tee 1. The lower end of the casing tee 1 is connected to the wellhead, and the upper end is connected to a first tee 10 through a flange. A water cut analyzer 22 is connected to the side of the first tee 10 to continuously monitor the water content in the oil-gas-water mixture at the oil production wellhead. The other end of the water cut analyzer 22 is connected to a pressure tee 21 through a first union 18-1, and the pressure tee 21 is also connected to a four-way head 20. The side of the casing tee 1 is connected to a dynamic liquid level on-line automatic tester 29 through a second tee 12 to collect the liquid level change data at the oil production wellhead and cooperate with a constant pressure gas release valve 19 to control the air pressure. The second tee 12 is also connected to a constant pressure gas release valve 19 through an intake hose 28, and the upper part of the constant pressure gas release valve 19 is connected to the four-way head 20.

[0024] A lower flange 3 is installed at the top end of the casing tee 1, and an upper flange 7 is sleeved at the bottom end of the first tee 10. A short pipe 2 is inserted at the bottom end of the upper flange 7, and the bottom end of the short pipe 2 is inserted into the upper end of the casing tee 1. A gasket ring 6 is arranged between the lower flange 3 and the upper flange 7, and the lower flange 3 and the upper flange 7 are tightly connected by bolts. The casing tee 1 is clamped and fixed by the lower flange 3. The top end of the upper flange 7 is connected and matched with the first tee 10, and the bottom end is inserted and matched with the short pipe 2. A gasket ring 6 is installed between the upper flange 7 and the lower flange 3 for sealing, and in cooperation with the connection of the stud 5 and the nut 4, the upper flange 7 and the lower flange 3 are fixed, so that the top end of the casing tee 1 is communicated and matched with the short pipe 2, and thus the oil, gas and water can be transported in a sealed state.

[0025] The lower part of the constant pressure gas release valve 19 is connected to a produced liquid discharge pipe through a second union 18-2. The produced liquid discharge pipe includes a first double-wire pipe 17, and the lower part of the first double-wire pipe 17 is connected to a first single-wire pipe 11-1 through a third gate valve 13-3. The oil-gas-water mixture is discharged from here.

[0026] During oil production operations, the lower end of the casing tee 1 is connected to the wellhead. When the oil-gas-water mixture flows into the oil production wellhead, the liquid level will rise or fall accordingly. The dynamic liquid level on-line automatic tester 29 will send a detection signal to the wellhead. Based on the liquid level change data collected by the sensor in the dynamic liquid level on-line automatic tester 29, information such as the oil and gas production and water cut at the oil production wellhead can be calculated. The gas collected at the wellhead is discharged into the constant pressure gas release valve 19, and the constant pressure gas release valve 19 can stabilize the pressure at the oil production wellhead and ensure the normal operation of the oil production project.

[0027] The mixed oil-gas-water enters the first three-way joint 10 from the short connecting pipe 2 and then enters the water content analyzer 22. The water content analyzer 22 monitors the water content in the oil-gas-water mixture at the oil production wellhead in real time, helping engineers master the change trend of oil and gas production, adjust the oil production process parameters in time, and improve the oil and gas recovery rate. In addition, the water content analyzer 22 monitors the pressure and flow rate at the oil production wellhead, provides data support for oil production engineering, and the mixed oil-gas-water after detection is discharged from the pipe below the constant pressure gas release valve 19 together with the gas recovered from the wellhead through the constant pressure gas release valve 19. During the whole process, the liquid level change in the oil production wellhead and the water content in the oil-gas-water mixture are detected in real time.

[0028] Embodiment 2:

[0029] A multifunctional oil production wellhead device in this embodiment includes a casing three-way joint 1. The lower end of the casing three-way joint 1 is connected to the wellhead, and the upper end is connected with a first three-way joint 10 through a flange. A water content analyzer 22 is connected to the side of the first three-way joint 10 to monitor the water content in the oil-gas-water mixture at the oil production wellhead in real time. The other end of the water content analyzer 22 is connected to a pressure three-way joint 21 through a first union 18-1, and the pressure three-way joint 21 is also connected with a four-way joint 20. The side of the casing three-way joint 1 is connected to a dynamic liquid level on-line automatic tester 29 through a second three-way joint 12 to collect the liquid level change data at the oil production wellhead and cooperate with the constant pressure gas release valve 19 to control the air pressure. The second three-way joint 12 is also connected with a constant pressure gas release valve 19 through an intake hose 28, and the upper part of the constant pressure gas release valve 19 is connected with the four-way joint 20.

[0030] A lower flange 3 is installed at the top end of the casing three-way joint 1, an upper flange 7 is sleeved at the bottom end of the first three-way joint 10, a short connecting pipe 2 is inserted at the bottom end of the upper flange 7, and the bottom end of the short connecting pipe 2 is inserted into the upper end of the casing three-way joint 1. A gasket 6 is arranged between the lower flange 3 and the upper flange 7, and the lower flange 3 and the upper flange 7 are tightly connected by bolts. The casing three-way joint 1 is clamped and fixed through the lower flange 3. The top end of the upper flange 7 is connected and matched with the first three-way joint 10, and the bottom end is inserted and matched with the short connecting pipe 2. A gasket 6 is installed between the upper flange 7 and the lower flange 3 for sealing, and in cooperation with the connection of the stud 5 and the nut 4, the upper flange 7 and the lower flange 3 are fixed, so that the top end of the casing three-way joint 1 is communicated and matched with the short connecting pipe 2, and thus the oil-gas-water can be transported in a sealed state.

[0031] The lower part of the constant pressure gas release valve 19 is connected to a produced liquid discharge pipe through a second union 18-2. The produced liquid discharge pipe includes a first double-wire connecting pipe 17, and the lower part of the first double-wire connecting pipe 17 is connected with a first single-wire connecting pipe 11-1 through a third gate valve 13-3. The oil-gas-water mixture is discharged from here.

[0032] A spare oil drain pipe is also arranged on the right side of the four-way head 20, and the spare oil drain pipe is connected to the four-way head 20 through a second double-thread pipe 24; the spare oil drain pipe includes a third three-way head 25, and a third double-thread pipe 8 is connected to the third three-way head 25 below, and a fourth double-thread pipe 9 is connected to the third double-thread pipe 8 below through a third union 18-3, and a fourth gate valve 13-4 and a second single-thread pipe 11-2 are connected to the fourth double-thread pipe 9 in sequence. A first wire plug 23-1 is installed at the top of the four-way head 20, and a second wire plug 23-2 is installed at the top of the third three-way head 25, so that when additional pipelines are connected later, the pipelines can be directly installed to provide a reserved position.

[0033] A valve pipe 26 is welded on the side of the third three-way head 25, and the valve pipe 26 is connected to a right-angle pipe 27 through the fourth stop valve 14-4. A second stop valve 14-2 is installed on the pressure three-way head 21, and a second pressure gauge 15-2 is installed on the second stop valve 14-2 to detect the pressure for safe mining. A second gasket 16-2 is installed between the second stop valve 14-2 and the second pressure gauge 15-2 for sealing, which improves the accuracy of the detection of the second pressure gauge 15-2 and avoids leakage of oil, gas and water. After the produced fluid detected by the tax-inclusive analyzer is pressure-measured again at the second pressure gauge 15-2, it can be discharged from the right-angle pipe 27 for sampling.

[0034] A third stop valve 14-3 is also installed between the second three-way head 12 and the air intake hose 28. One end of the third stop valve 14-3 is connected to the second three-way head 12, and the other end is connected to the air intake hose 28. A first stop valve 14-1 is also installed between the second three-way head 12 and the air intake hose 28. One end of the first stop valve 14-1 is connected to the second three-way head 12, and the other end is installed with a first pressure gauge 15-1 to detect the pressure for safe production. A first gasket 16-1 is installed between the first stop valve 14-1 and the first pressure gauge 15-1 for sealing, which improves the accuracy of the detection of the first pressure gauge 15-1 and avoids leakage of oil, gas and water. The first pressure gauge 15-1 can monitor the pressure and flow of the oil wellhead and provide data support for the oil production project. By controlling the opening and closing of the first stop valve 14-1, real-time monitoring of the pressure from the second three-way head 12 to the air intake hose 28 can be achieved; by controlling the opening and closing of the second stop valve 14-2, the dynamic liquid level online automatic tester 29 can be controlled to monitor the mixed oil, gas and water in the oil and gas wellhead.

[0035] The first three-way joint 10 and the water content analyzer 22 are connected by a first gate valve 13-1. The second three-way joint 12 and the on-line automatic liquid level tester 29 are connected by a second gate valve 13-2. The single-wire connecting pipe and the first double-wire connecting pipe 17 are connected by a third gate valve 13-3. By providing the first gate valve 13-1, the second gate valve 13-2, and the third gate valve 13-3, the opening and closing of the first gate valve 13-1, the second gate valve 13-2, and the third gate valve 13-3 can be manually controlled, so as to control the connection between the first three-way joint 10 and the water content analyzer 22, between the second three-way joint 12 and the on-line automatic liquid level tester 29, and between the single-wire connecting pipe and the first double-wire connecting pipe 17.

Claims

1. A multifunctional oil production wellhead device, characterized in that: The invention comprises a casing tee (1), wherein the lower end of the casing tee (1) is connected to a wellhead, and the upper end is connected to a first tee (10) via a flange, and the first tee (10) is connected to a water content analyzer (22) on the side; the other end of the water content analyzer (22) is connected to a pressure tee (21) via a first union (18-1), and the pressure tee (21) is also connected to a cross-head (20); the side of the casing tee (1) is connected to an online automatic dynamic liquid level tester (29) via a second tee (12), and the second tee (12) is also connected to a constant pressure air release valve (19) via an air intake hose (28), and the top of the constant pressure air release valve (19) is connected to the cross-head (20).

2. A multifunctional oil production wellhead device according to claim 1, characterized in that: The lower part of the constant pressure air release valve (19) is connected to a produced liquid discharge pipe via a second union (18-2), and the produced liquid discharge pipe comprises a first double-wire pipe (17), and the lower part of the first double-wire pipe (17) is connected to a first single-wire pipe (11-1) via a third gate valve (13-3).

3. A multifunctional oil production wellhead device according to claim 2, characterized in that: A spare oil drain pipe is also arranged on the right side of the cross-head (20), and the spare oil drain pipe is connected to the cross-head (20) through a second double-thread pipe (24); the spare oil drain pipe comprises a third three-way head (25), a third double-thread pipe (8) is connected below the third three-way head (25), a fourth double-thread pipe (9) is connected below the third double-thread pipe (8) through a third union, and a fourth gate valve (13-4) and a second single-thread pipe (11-2) are sequentially connected below the fourth double-thread pipe (9).

4. A multifunctional oil production wellhead device according to claim 3, characterized in that: A valve connecting pipe (26) is welded to the side of the third three-way connector (25), and the valve connecting pipe (26) is connected to a right-angle pipe (27) via a fourth stop valve (14-4).

5. A multifunctional oil production wellhead device according to claim 3, characterized in that: A first thread plug (23-1) is installed at the top end of the four-way head (20), and a second thread plug (23-2) is installed at the top end of the third three-way head (25).

6. A multifunctional oil production wellhead device according to claim 1, characterized in that: A second stop valve (14-2) is installed on the pressure three-way head (21), a second pressure gauge (15-2) is installed on the second stop valve (14-2), and a second gasket (16-2) is installed between the second stop valve (14-2) and the second pressure gauge (15-2).

7. The multifunctional oil production wellhead device according to claim 1, characterized in that: A third stop valve (14-3) is also installed between the second three-way connector (12) and the air intake hose (28); one end of the third stop valve (14-3) is connected to the second three-way connector (12), and the other end is connected to the air intake hose (28).

8. A multifunctional oil production wellhead device according to claim 7, characterized in that: A first stop valve (14-1) is also installed between the second three-way connector (12) and the air intake hose (28); one end of the first stop valve (14-1) is connected to the second three-way connector (12); the other end of the first stop valve (14-1) is installed with a first pressure gauge (15-1); and a first gasket (16-1) is installed between the first stop valve (14-1) and the first pressure gauge (15-1).

9. The multifunctional oil production wellhead device according to claim 1, characterized in that: The top end of the sleeve tee (1) is provided with a lower flange (3), the bottom end of the first tee (10) is sleeved with an upper flange (7), the bottom end of the upper flange (7) is plugged with a short pipe (2), the bottom end of the short pipe (2) is plugged into the upper end of the sleeve tee (1), a gasket (6) is provided between the lower flange (3) and the upper flange (7), and the lower flange (3) and the upper flange (7) are fastened and connected by bolts.

10. The multifunctional oil production wellhead device according to claim 2, characterized in that: The first three-way connector (10) and the water content analyzer (22) are connected via a first gate valve (13-1), the second three-way connector (12) and the dynamic liquid level online automatic tester (29) are connected via a second gate valve (13-2), and the first single-wire connecting pipe (11-1) and the first double-wire connecting pipe (17) are connected via a third gate valve (13-3).

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