Electrically controlled compact managed pressure drilling choke manifold

Abstract

The utility model belongs to the field of petroleum drilling engineering discloses a kind of electric control type compact pressure control drilling throttle manifold, including the parallelly connected straight passage, main control throttle passage and vice control throttle passage;First parallel gate valve is provided on straight passage;Second parallel gate valve and first electric control throttle valve are sequentially provided on main control throttle passage along liquid flow direction;Third parallel gate valve and second electric control throttle valve are sequentially provided on vice control throttle passage along liquid flow direction;Straight passage and main control throttle passage are on the same horizontal plane, vice control throttle passage is located above straight passage, and straight passage, main control throttle passage and vice control throttle passage form L shape on vertical projection plane.The utility model can reduce the land area of throttle manifold in well site, and failure rate is low, response speed is fast, control precision is high, and fast accurate pressure regulation can be realized;The utility model is suitable for pressure control drilling operation in oil and gas exploration.

Description

Technical Field

[0001] This utility model belongs to the field of oil drilling engineering, specifically an electrically controlled compact pressure controlled drilling choke manifold. Background Technology

[0002] In the field of oil drilling engineering, as oil and gas exploration expands to deeper, ultra-deeper formations and complex geological strata, conventional drilling techniques face challenges such as narrow safety density windows, multiple pressure systems, and sensitivity to pressure fluctuations. These challenges easily lead to complex problems such as well kicks, lost circulation, simultaneous leakage and spillage, and stuck pipe, severely restricting exploration and development efficiency and safety. Controlled pressure drilling (MPD), as a high-precision pressure control method, regulates the wellhead back pressure through a choke manifold to maintain the annular pressure between formation pore pressure and leakage pressure, solving problems such as well kicks and wellbore instability caused by changes in formation pressure gradients in conventional drilling.

[0003] However, existing conventional controlled pressure drilling choke manifolds have the following drawbacks: First, their structure is mostly planar, occupying a large area, which increases transportation and deployment costs in scenarios where well site space is limited or the geographical environment is complex; Second, the choke valves mostly adopt hydraulic control mode, the hydraulic system is complex and prone to failure due to impurities clogging; Moreover, the choke valves in the hydraulic control mode have slow response speed and low control accuracy, making it difficult to achieve fast and accurate pressure regulation. Utility Model Content

[0004] The present invention aims to provide an electrically controlled compact controlled pressure drilling choke manifold to solve the problems of large footprint, high failure rate of hydraulic control mode, and difficulty in achieving rapid and accurate pressure regulation in existing conventional controlled pressure drilling choke manifolds.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An electrically controlled compact pressure-controlled drilling choke manifold includes a straight passage, a main control choke passage, and a secondary control choke passage arranged in parallel; A first parallel gate valve is installed on the straight passage; a second parallel gate valve and a first electrically controlled throttle valve are sequentially installed along the liquid flow direction on the main control throttle passage; a third parallel gate valve and a second electrically controlled throttle valve are sequentially installed along the liquid flow direction on the secondary control throttle passage. The straight path and the main control flow path are on the same horizontal plane, and the secondary control flow path is located above the straight path. The straight path, the main control flow path and the secondary control flow path form an L-shape on the vertical projection plane.

[0006] As a limitation of this utility model: a fourth parallel gate valve is provided on the main control throttling flow path downstream of the first electrically controlled throttling valve.

[0007] As a further limitation of this utility model: a first three-way filter is provided between the downstream of the first electrically controlled throttle valve and the fourth parallel gate valve.

[0008] As a further limitation of this utility model: the downstream of the first electrically controlled throttle valve is connected to the first three-way filter through a first reducing flange and a first double-sided flange.

[0009] As another limitation of this utility model: a fifth parallel gate valve is provided on the secondary control throttling flow path downstream of the second electrically controlled throttling valve.

[0010] As a further limitation of this utility model: a second three-way filter is provided between the downstream of the second electrically controlled throttle valve and the fifth parallel gate valve.

[0011] As a further limitation of this utility model: the downstream of the second electrically controlled throttle valve is connected to the second three-way filter through a second reducing flange and a second double-sided flange.

[0012] As another limitation of this utility model: the liquid inlet end of the straight passage, the liquid inlet end of the main control flow path and the liquid inlet end of the secondary control flow path are connected by a first multi-way valve, and the liquid outlet end of the straight passage, the liquid outlet end of the main control flow path and the liquid outlet end of the secondary control flow path are connected by a second multi-way valve.

[0013] As a further limitation of this utility model: the first multi-way valve is a five-way valve.

[0014] As a further limitation of this utility model: the second multi-way valve is a four-way valve.

[0015] By adopting the above technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows: This utility model includes a straight passage, a main control throttling passage, and a secondary control throttling passage arranged in parallel. The straight passage and the main control throttling passage are on the same horizontal plane, and the secondary control throttling passage is located above the straight passage. The straight passage, the main control throttling passage, and the secondary control throttling passage form an L-shape on the vertical projection plane. By integrating the straight passage, the main control throttling passage, and the secondary control throttling passage in a three-dimensional manner, the space utilization is expanded from the planar direction to the vertical direction, changing the traditional two-dimensional planar layout mode of the throttling manifold. This greatly reduces the footprint of the throttling manifold at the well site, making it particularly suitable for complex operating environments with limited space, such as offshore platforms and mountainous areas, and effectively reducing transportation and deployment costs. This invention employs an electrically controlled throttle valve instead of a traditional hydraulic throttle valve. The electrically controlled throttle valve eliminates the need for complex hydraulic power units, oil pipelines, and hydraulic oil auxiliary systems, fundamentally avoiding clogging caused by hydraulic oil leakage and insufficient oil cleanliness. Furthermore, the electrically controlled throttle valve precisely controls the valve core opening by receiving electrical signal commands, eliminating phenomena such as oil compressibility, pipeline pressure loss, and valve lag present in hydraulic systems. Therefore, it offers fast response speed, high control accuracy, and enables rapid and precise pressure regulation.

[0016] In summary, this invention can reduce the footprint of the choke manifold at the well site, and has a low failure rate, fast response speed, and high control accuracy, enabling rapid and precise pressure regulation; this invention is applicable to pressure-controlled drilling operations in oil and gas exploration. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the left-side structure of an embodiment of the present utility model; Figure 3 This is a top view of an embodiment of the present utility model. Figure 4 This is a schematic diagram of the structure of this utility model embodiment in its unfolded state.

[0019] In the diagram: 1-Inlet flange, 2-Five-way valve, 3-Second parallel gate valve, 4-Third reducing flange, 5-First electrically controlled throttle valve, 6-First reducing flange, 7-First double-sided flange, 8-First three-way filter, 9-Fourth parallel gate valve, 10-Four-way valve, 11-First parallel gate valve, 12-Outlet flange, 13-Third parallel gate valve, 14-Fourth reducing flange, 15-Second electrically controlled throttle valve, 16-Second reducing flange, 17-Second double-sided flange, 18-Second three-way filter, 19-Fifth parallel gate valve, 20-Straight passage, 21-Main throttle passage, 22-Secondary throttle passage. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and do not constitute a limitation thereof.

[0021] like Figures 1-4 As shown, this embodiment includes a straight path 20, a main control flow path 21, and a secondary control flow path 22 arranged in parallel. Depending on the on-site construction conditions, one path is selected to be opened, while the others are closed.

[0022] like Figure 2 , 4 As shown, a first parallel gate valve 11 is installed on the straight passage 20. In this embodiment, the internal channel of the first parallel gate valve 11 constitutes the straight passage 20. Figure 4 As shown, the inlet end of the straight passage 20, the inlet end of the main control flow path 21, and the inlet end of the secondary control flow path 22 are connected by a first multi-way valve, which is a conventional five-way valve 2. The outlet end of the straight passage 20, the outlet end of the main control flow path 21, and the outlet end of the secondary control flow path 22 are connected by a second multi-way valve, which is a conventional four-way valve 10.

[0023] A second parallel gate valve 3 and a first electrically controlled throttle valve 5 are sequentially arranged along the liquid flow direction on the main control throttle path 21. The liquid flow direction refers to... Figure 4 The direction of the middle arrow. By controlling the opening of the first parallel gate valve 11 or the second parallel gate valve 3, the drilling fluid can flow through the straight passage 20 or the main control throttle passage 21. When the drilling fluid flows through the straight passage 20, in order to prevent the drilling fluid from entering the main control throttle passage 21 from the outlet end of the straight passage 20, a fourth parallel gate valve 9 is installed on the main control throttle passage 21 downstream of the first electrically controlled throttle valve 5.

[0024] To filter out impurities such as mud and stones and prevent drilling fluid from clogging subsequent pipelines, a first three-way filter 8 is installed downstream of the first electrically controlled throttle valve 5 and between the fourth parallel gate valve 9. The structure of the first three-way filter 8 is existing technology.

[0025] In this embodiment, the connection relationships in the main control throttling path 21 are as follows: one end of the second parallel gate valve 3 is connected to the five-way valve 2, and the other end is connected to the upstream of the first electrically controlled throttle valve 5 via the third reducing flange 4. The downstream of the first electrically controlled throttle valve 5 is connected to the first three-way filter 8 via the first reducing flange 6 and the first double-sided flange 7. One end of the fourth parallel gate valve 9 is connected to the four-way valve 10, and the other end is connected to the first three-way filter 8.

[0026] like Figure 4 As shown, a third parallel gate valve 13 and a second electrically controlled throttle valve 15 are sequentially arranged along the liquid flow direction on the secondary control throttle flow path 22. The liquid flow direction refers to... Figure 4The direction of the middle arrow. By controlling the opening of the first parallel gate valve 11, the second parallel gate valve 3, or the third parallel gate valve 13, the drilling fluid can flow through the straight passage 20, the main control throttle passage 21, or the secondary control throttle passage 22. When the drilling fluid flows through the straight passage 20 or the main control throttle passage 21, in order to prevent the drilling fluid from entering the secondary control throttle passage 22 from the outlet end of the straight passage 20, a fifth parallel gate valve 19 is installed on the secondary control throttle passage 22 downstream of the second electrically controlled throttle valve 15.

[0027] Similarly, in order to filter out impurities such as mud and stones and prevent drilling fluid from clogging the subsequent pipeline, a second three-way filter 18 is provided downstream of the second electrically controlled throttle valve 15 and between the fifth parallel gate valve 19. The structure of the second three-way filter 18 is also existing technology.

[0028] In this embodiment, the connection relationships in the secondary control throttle flow path 22 are as follows: one end of the third parallel gate valve 13 is connected to the five-way valve 2, and the other end is connected to the upstream of the second electrically controlled throttle valve 15 via the fourth reducing flange 14. The downstream of the second electrically controlled throttle valve 15 is connected to the second three-way filter 18 via the second reducing flange 16 and the second double-sided flange 17. One end of the fifth parallel gate valve 19 is connected to the four-way valve 10, and the other end is connected to the second three-way filter 18.

[0029] In this embodiment, the first parallel gate valve 11 to the fifth parallel gate valve 19 are all existing structures; the first electrically controlled throttle valve 5 and the second electrically controlled throttle valve 15 are both existing structures; the first reducing flange 6 to the fourth reducing flange 14, the first double-sided flange 7, and the second double-sided flange 17 are all existing structures.

[0030] It should be added that, such as Figure 4 As shown, the five-way valve 2 is also connected to an inlet flange 1, which can be connected to the wellhead via a pipeline. The four-way valve 10 is connected to an outlet flange 12, which is also used to connect pipelines.

[0031] In practice, after installation, this embodiment forms a circulation pipeline. The drilling fluid flowing from the wellhead enters the five-way valve 2 through the inlet flange 1. At this point, depending on the opening and closing status of the first parallel gate valve 11, the second parallel gate valve 3, and the third parallel gate valve 13, the drilling fluid is directed to flow through the straight passage 20, the main control passage 21, or the secondary control passage 22. Subsequently, the drilling fluid flows out from the outlet flange 12 in this embodiment, passes through the pipeline, and sequentially enters the circulation tank and the bottom of the well. It then flows out from the wellhead back into this embodiment, thus achieving drilling fluid circulation.

[0032] Furthermore, such as Figure 1-4 As shown, the direct path 20 and the main control flow path 21 are on the same horizontal plane, and the secondary control flow path 22 is located above the direct path 20, as shown. Figure 1 As shown, the straight path 20, the main control flow path 21, and the secondary control flow path 22 form an L-shape on the vertical projection plane. By integrating the straight path 20, the main control flow path 21, and the secondary control flow path 22 in a three-dimensional manner, the space utilization is expanded from the planar direction to the vertical direction, occupying an area of ​​only 3.6m². 2 This technology changes the traditional two-dimensional planar layout of throttling manifolds, saving 30%-40% of the site area and greatly reducing the footprint of throttling manifolds at the well site. It is particularly suitable for complex operating environments with limited space, such as offshore platforms and mountainous areas, effectively reducing transportation and deployment costs, while also shortening installation time and reducing labor intensity.

[0033] This invention uses an electrically controlled throttle valve to replace the traditional hydraulic throttle valve, fundamentally avoiding clogging caused by hydraulic oil leakage and insufficient oil cleanliness. Furthermore, the electrically controlled throttle valve precisely controls the valve core opening by receiving electrical signal commands, offering fast response (response time ≤ 10ms) and high control accuracy (±0.1MPa), enabling rapid and precise pressure regulation; it also allows for manual adjustment in emergency situations.

[0034] The working principle of this embodiment is as follows: Firstly, without the need for pressure control, open the first parallel gate valve 11 on the straight passage 20, close the second parallel gate valve 3 and the fourth parallel gate valve 9 on the main control flow passage 21, and the third parallel gate valve 13 and the fifth parallel gate valve 19 on the secondary control flow passage 22. The drilling fluid flows into the straight passage 20 from the inlet flange 1 and flows out through the outlet flange 12.

[0035] Secondly, during controlled pressure drilling, pressure control is achieved through the first electrically controlled throttle valve 5 on the main control throttle path 21: the second parallel gate valve 3 and the fourth parallel gate valve 9 on the main control throttle path 21 are opened, the first parallel gate valve 11 on the straight passage 20 is closed, and the third parallel gate valve 13 and the fifth parallel gate valve 19 on the secondary control throttle path 22 are closed. At this time, the effective throttle path is the main control throttle path 21, while the straight passage 20 and the secondary control throttle path 22 are closed passages, and there is no flow of drilling fluid. The drilling fluid enters the main control throttle path 21 for pressure control. After the drilling fluid flows out from the first electrically controlled throttle valve 5, it passes through the first three-way filter 8 for impurity filtration, which can effectively prevent clogging of the external flow monitoring device.

[0036] Thirdly, during controlled-pressure drilling, if the main control throttling flow path 21 needs maintenance and the auxiliary control throttling flow path 22 needs to be activated for continued throttling and pressure control operations: first, close the second electrically controlled throttling valve 15 on the auxiliary control throttling flow path 22, open the third parallel gate valve 13 and the fifth parallel gate valve 19 on the auxiliary control throttling flow path 22, slowly close the first electrically controlled throttling valve 5 on the main control throttling flow path 21, and simultaneously slowly open the second electrically controlled throttling valve 15 on the auxiliary control throttling flow path 22. At this time, drilling fluid enters the auxiliary control throttling flow path 22 for throttling and pressure control. Finally, close the second parallel gate valve 3 and the fourth parallel gate valve 9 on the main control throttling flow path 21, thus completing the pressurized switching process. Only then can the main control throttling flow path 21 be inspected and maintained. This embodiment enables rapid switching under pressure during controlled-pressure operations to inspect and maintain a certain passage and its electrically controlled throttling valve, further extending the service life of the electrically controlled throttling valve.

[0037] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A compact, electrically controlled pressure-controlled drilling choke manifold, characterized in that, This includes the direct path, main control section flow path, and auxiliary control section flow path configured in parallel; A first parallel gate valve is installed on the straight passage; a second parallel gate valve and a first electrically controlled throttle valve are sequentially installed along the liquid flow direction on the main control throttle passage; a third parallel gate valve and a second electrically controlled throttle valve are sequentially installed along the liquid flow direction on the secondary control throttle passage. The straight path and the main control flow path are on the same horizontal plane, and the secondary control flow path is located above the straight path. The straight path, the main control flow path and the secondary control flow path form an L-shape on the vertical projection plane.

2. The electrically controlled compact controlled pressure drilling choke manifold according to claim 1, characterized in that, A fourth parallel gate valve is installed downstream of the first electrically controlled throttle valve on the main control flow path.

3. The electrically controlled compact controlled pressure drilling choke manifold according to claim 2, characterized in that, A first three-way filter is installed between the downstream of the first electrically controlled throttle valve and the fourth parallel gate valve.

4. The electrically controlled compact controlled pressure drilling choke manifold according to claim 3, characterized in that, The downstream of the first electrically controlled throttle valve is connected to the first three-way filter via a first reducing flange and a first double-sided flange.

5. A compact, electrically controlled pressure-controlled drilling choke manifold according to any one of claims 1-4, characterized in that, A fifth parallel gate valve is installed downstream of the second electrically controlled throttle valve on the secondary control flow path.

6. The electrically controlled compact pressure-controlled drilling choke manifold according to claim 5, characterized in that, A second three-way filter is installed downstream of the second electrically controlled throttle valve and between it and the fifth parallel gate valve.

7. The electrically controlled compact controlled pressure drilling choke manifold according to claim 6, characterized in that, The downstream of the second electrically controlled throttle valve is connected to the second three-way filter via a second reducing flange and a second double-sided flange.

8. A compact, electrically controlled pressure-controlled drilling choke manifold according to any one of claims 1-4, 6, and 7, characterized in that, The inlet end of the straight passage, the inlet end of the main control flow path, and the inlet end of the secondary control flow path are connected by a first multi-way valve, and the outlet end of the straight passage, the outlet end of the main control flow path, and the outlet end of the secondary control flow path are connected by a second multi-way valve.

9. The electrically controlled compact pressure-controlled drilling choke manifold according to claim 8, characterized in that, The first multi-way valve is a five-way valve.

10. The electrically controlled compact pressure-controlled drilling choke manifold according to claim 9, characterized in that, The second multi-way valve is a four-way valve.

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