Rotary blowout preventer with flow detection function

Abstract

The utility model relates to the technical field of drilling and completion pressure control, in particular to a rotary blowout preventer with a flow detection function, which comprises a rotary blowout preventer assembly and a flow detection module. The rotary blowout preventer assembly comprises a shell and a rotary sealing assembly, a main through hole and a bypass outlet are formed in the shell, the rotary sealing assembly is arranged in the main through hole, and the bypass outlet is connected with a straight-through cut-off valve; the flow meter is arranged in the direction of the main through hole and extends upwards. The first flow block valve and the second flow block valve are arranged at the two ends of the flow meter respectively and communicate with the flow meter. An inlet of the flow meter is a flow detection input interface which is communicated with the straight-through block valve; and an outlet of the second flow block valve is a flow detection output interface. The space occupied by the flow detection module in the horizontal direction of the rotary blowout preventer assembly is small, the main occupied space extends upwards in the direction of the main through hole, and therefore the whole rotary blowout preventer is small in occupied space and compact in structure.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling and completion pressure control, specifically to a rotary blowout preventer with flow detection function. Background Technology

[0002] In oil and gas wells located in complex pressure formations, the narrow density window during drilling and completion can easily lead to complex accidents such as downhole gas intrusion, overflow, lost circulation, and displacement, resulting in a significant increase in non-productive time, higher drilling cycles, and higher costs. Therefore, techniques such as wellbore annular sealing and downhole multiphase fluid metering are necessary for prevention and control. This technology generally includes rotary blowout preventers (BOPs) and metering manifolds. Current technology installs the rotary BOP at the wellhead, while the metering manifold is located on the ground at a considerable distance. The functions of each key device are relatively independent, connected by long high-pressure pipelines, resulting in low system integration, complex site layout, long installation and commissioning cycles, high costs, and difficult maintenance. Utility Model Content

[0003] This invention addresses one of the problems in the prior art by providing a rotary blowout preventer with flow detection function. 。

[0004] The technical solution is as follows: A rotary blowout preventer with flow detection function, comprising a rotary blowout preventer assembly and a flow detection module;

[0005] The rotary blowout preventer assembly includes a housing and a rotary seal assembly. The housing has a main through-hole and a bypass outlet. The rotary seal assembly is disposed in the main through-hole. A direct shut-off valve is connected to the bypass outlet.

[0006] The flow detection module includes a flow meter, a first flow shut-off valve, and a second flow shut-off valve. The flow meter extends upward in the direction of the main through-hole. The first flow shut-off valve and the second flow shut-off valve are respectively located at both ends of the flow meter and communicate with the flow meter. The inlet of the flow meter is a flow detection input interface, which is connected to the through shut-off valve. The outlet of the second flow shut-off valve is a flow detection output interface.

[0007] The working principle and beneficial effects of this utility model are as follows: by setting the flow meter to extend upward in the direction of the main through hole, the entire flow detection module is integrated on the rotary blowout preventer assembly and extends upward in the direction of the main through hole. Since the flow detection module occupies less space in the horizontal direction of the rotary blowout preventer assembly and mainly occupies space in the direction of the main through hole, the entire rotary blowout preventer occupies less space and has a compact structure.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the first flow shut-off valve and the second flow shut-off valve are arranged facing each other, and a dual-output actuator is provided between the first flow shut-off valve and the second flow shut-off valve to drive the first flow shut-off valve and the second flow shut-off valve to be in an open and closed state respectively.

[0010] The beneficial effects of adopting the above-mentioned further solution are: by driving the first flow shut-off valve and the second flow shut-off valve to be in an open and closed state by a dual-output actuator, the function of controlling two shut-off valves by a single actuator is realized, reducing product components and improving control efficiency.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the dual-output actuator is an electrically driven structure.

[0013] The beneficial effects of adopting the above-mentioned further solutions are that the electric drive structure realizes electric control and can be remotely and automatically controlled.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the electric drive structure is also equipped with a manual drive mechanism.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting a manual drive mechanism, the system can be operated manually when the electric drive mechanism fails or malfunctions, ensuring normal operation of the system. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the rotary blowout preventer with flow detection function of this utility model;

[0018] Figure 2 This is a view in the first direction of Embodiment 1;

[0019] Figure 3 This is a view from another direction in Embodiment 1;

[0020] Figure 4 This is a cross-sectional view of Embodiment 1 from one direction;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the rotary blowout preventer assembly in Embodiment 1;

[0022] Figure 6 This is a cross-sectional view of the shell in Embodiment 1;

[0023] Figure 7 This is a cross-sectional view of the rotary seal assembly in Embodiment 1;

[0024] Figure 8 This is a cross-sectional view of the rotary blowout preventer assembly in Embodiment 1;

[0025] Figure 9 yes Figure 8 A partial schematic diagram of point A in the middle;

[0026] Figure 10 yes Figure 8 A partial schematic diagram at point B in the middle;

[0027] Figure 11 This is a flowchart of the first working state of Embodiment 1;

[0028] Figure 12 This is a flowchart of the second working state of Embodiment 1.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Rotary blowout preventer assembly; 11. Housing; 12. Rotary seal assembly; 13. Control box; 2. Connector; 21. First interface; 22. Second interface; 23. Straight-through shut-off valve; 31. Flow meter; 32. First flow shut-off valve; 33. Second flow shut-off valve; 34. Dual-output actuator; 35. Right-angle connector; 36. T-connector; 4. Clamping mechanism; 41. Single-output actuator; 42. Pinion; 43. Turntable gear; 44. Bevel gear; 45. Conical gear; 46. Clamping element; 47. Second bearing. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] See the structural schematic diagram of Embodiment 1 of the rotary blowout preventer with flow detection function of this utility model. Figures 1 to 10 .

[0033] A rotary blowout preventer with flow detection function includes a rotary blowout preventer assembly 1, a connector 2, and a flow detection module. The rotary blowout preventer assembly 1 includes a housing 11 and a rotary seal assembly 12. The housing 11 is provided with a main through hole and a bypass outlet. The rotary seal assembly 12 is disposed in the main through hole. A straight-through shut-off valve is connected to the bypass outlet. The straight-through shut-off valve is disposed on the connector 2. That is, the straight-through shut-off valve 23 is disposed at the first interface 21 end, and the first interface 21 of the connector 2 is connected to the bypass outlet. A control box 13 for controlling the rotary blowout preventer with flow detection function is provided on the side opposite to the connector 2 on the housing 11. The control box 13 contains a control module, which is electrically connected to the flow detection module, the straight-through shut-off valve 23, the dual-output actuator 34, and the single-output actuator 41. Specifically, the control module controls the opening and closing of the valves in the flow detection module, the opening and closing of the straight-through shut-off valve 23, and the clamping and opening operations of the clamping mechanism on the rotary blowout preventer by the single-output actuator 41. The flow detection module is located at the second interface 22 end of the connector 2. Specifically, the flow detection module includes a flow meter 31, a first flow shut-off valve 32, and a second flow shut-off valve 33. The flow meter 31 extends upwards in the direction of the main through-hole, that is, it extends vertically upwards as shown in the figure. The first flow shut-off valve 32 and the second flow shut-off valve 33 are respectively located at both ends of the flowmeter 31 and are connected to the flowmeter 31. The inlet of the flowmeter 31 is a flow detection input interface, which is located at the second interface 22. The outlet of the second flow shut-off valve 33 is a flow detection output interface. As shown in the figure, the first flow shut-off valve 32 and the second flow shut-off valve 33 are arranged vertically opposite each other in the illustrated direction. A dual-output actuator 34 is provided between the first flow shut-off valve 32 and the second flow shut-off valve 33 to drive the first flow shut-off valve 32 and the second flow shut-off valve 33 to be in an open and closed state, respectively. A right-angle connector 35 is provided at the outlet of the second flow shut-off valve 33, and the right-angle connector 35 and the outlet of the first flow shut-off valve 32 are connected by a three-way connector 36.

[0034] The dual-output actuator 34 drives the first flow shut-off valve 32 and the second flow shut-off valve 33 to be in an open and closed state, respectively. That is, when it is necessary to detect the flow rate of the fluid, the dual-output actuator 34 closes the first flow shut-off valve 32 and opens the second flow shut-off valve 33. The fluid then passes through the flow meter 31, flows out from the output end of the second flow shut-off valve 33, and finally flows out through the three-way connector 36, thus realizing the detection of the fluid flow rate.

[0035] If flow detection is not required, the first flow shut-off valve 32 is opened and the second flow shut-off valve 33 is closed by the dual-output actuator 34. The fluid does not pass through the flow meter 31 and flows directly out from the three-way connector 36 at the output end of the first flow shut-off valve 32.

[0036] like Figure 3 , Figures 5 to 9 As shown, the rotary blowout preventer with flow detection function in this embodiment also includes a clamping mechanism 4 for clamping the rotary seal assembly 12. The clamping mechanism 4 is disposed on the housing 11. The clamping mechanism 4 includes a clamping member 46 and a driving mechanism. The driving mechanism drives the clamping member 46 to extend out of the inner surface of the housing 11 or retract into the housing 11.

[0037] The drive mechanism includes a single-output actuator 41 and a transmission mechanism. The transmission mechanism includes a pinion 42, a turntable gear 43, and a bevel gear 45. The output shaft of the single-output actuator 41 is fixedly connected to the pinion 42. The turntable gear 43 is sleeved on the outside of the housing 11. The outside of the turntable gear 43 is provided with an external gear that is connected to the pinion 42. The top of the turntable gear 43 is provided with a bevel gear 44 that is connected to several bevel gears 45. The bevel gears 45 are connected to the clamping member 46 in a helical transmission.

[0038] In this embodiment, a first bearing is fixedly mounted on the housing 11, the inner ring of the first bearing is fixedly connected to the housing 11, and the outer ring of the first bearing is a turntable gear 43. Figure 9 As shown, the inner ring of the bearing is fixedly mounted on the housing 11, and the outer ring of the bearing is a turntable gear 43. In this embodiment, the turntable gear 43 and the bevel gear 44 are two separate components. During installation, the bevel gear 44 is fixed directly above the turntable gear 43 as shown in the figure. In a specific embodiment, the turntable gear 43 and the bevel gear 44 can also be set as an integral structure of the same component, that is, the bevel gear 44 can be directly set above the turntable gear 43. In this embodiment, the turntable gear 43 is a full circle of gears set on the outer surface of the bearing outer ring, realizing the meshing transmission between the pinion 42 and the turntable gear 43.

[0039] like Figure 10 As shown, one end of the clamping member 46 has an external thread, and the bevel gear 45 has an internal thread and is fixedly connected to the housing 11 through the second bearing 47. The external and internal threads are screwed together for a helical drive connection. The other end of the clamping member 46 (the left end in the figure) passes through the housing 11 and is slidably connected to it. The other end of the clamping member 46 is configured as a polygonal structure, and the corresponding housing 11 also has a polygonal through hole for the clamping member 46 to pass through. In the figure, the clamping member 46 is in a clamping state on the sealing assembly.

[0040] In this embodiment, Figure 10 The clamping element 46 and its mating second bearing 47 are arranged in a four-equal-distribution structure, which achieves balanced pressure on the sealing assembly by the clamping element 46 and improves the reliability of clamping. In a specific embodiment, the clamping element 46 can be set in a larger number to meet the requirements according to the actual well control conditions.

[0041] In this embodiment, the working process of the clamping mechanism 4 is as follows: Before the rotary seal assembly 12 is inserted, the clamping member 46 is located in the housing 11 and does not protrude from the surface of the main through hole. The rotary seal assembly 12 is inserted into the housing 11 from above the main through hole. When it reaches the set position, the single-output actuator 41 is controlled to drive the pinion 42 connected to the output end of the single-output actuator 41 to rotate. The pinion 42 drives the turntable gear 43 to rotate, which in turn drives the bevel gear 44 to rotate. The bevel gear 44 drives the four bevel gears 45 to rotate. When the bevel gears 45 rotate, the clamping member 46, which is threaded to them, will move relative to them in the horizontal direction shown in the figure. Since the bevel gears 45 are fixed to the housing 11 by the second bearing 47, the bevel gears 45 will not move in the horizontal direction shown in the figure. Therefore, the clamping member 46 will move towards the center of the housing 11, thereby pressing the rotary seal assembly 12 downward in the axial direction of the housing 11 as shown in the figure. When it is necessary to remove the rotary seal assembly 12, the single-output actuator 41 is controlled to retract the clamping member 46 into the housing 11.

[0042] See the flowchart of the first working state in this embodiment. Figure 11 The flowchart for flow detection using a rotary blowout preventer with flow detection function is shown in the figure. During the flow detection operation, the straight-through shut-off valve 23 is in the open state, while the first flow shut-off valve 32 is in the closed state and the second flow shut-off valve 33 is in the open state. The fluid passes through the flow meter 31 and then flows out from the output end of the second flow shut-off valve 33. The flow direction of the fluid in the flow channel is shown by the arrow in the figure, thus realizing the flow detection of the fluid.

[0043] See the flowchart for the second working state in this embodiment. Figure 12 That is, the rotary blowout preventer with flow detection function does not perform flow detection. The direct shut-off valve 23 is in the open state, the first flow shut-off valve 32 is in the open state, and the second flow shut-off valve 33 is in the closed state. The fluid does not pass through the flow meter 31. The flow direction of the fluid in the flow channel is as shown by the arrow in the figure. It flows directly out from the output end of the first flow shut-off valve 32.

[0044] In this embodiment, both output actuators are electrically driven structures. A manual drive mechanism can also be added to ensure that the system can operate normally through the manual mechanism in the event of failure or malfunction of the electrically driven structure.

[0045] In this embodiment, the through hole on the housing 11 for the clamping member 46 to pass through, and the clamping member 46 can be set to a non-circular shape according to actual use to prevent the clamping member 46 from rotating.

[0046] In the embodiments provided by this utility model, the straight-through shut-off valve 23, the first flow shut-off valve 32, and the inlet of the flow meter 31 are all integrated with the connector 2, that is, the above-mentioned multiple components are combined together, making the structure more compact and the volume smaller. At the same time, in specific applications, it can be set as a separate structure according to the actual situation.

[0047] In this embodiment, all shut-off valves are plug valves. In specific embodiments, other types of shut-off valves, such as gate valves and ball valves, can be selected according to their usage conditions.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rotary blowout preventer having a flow detection function, characterized by, The rotating blowout preventer assembly and the flow detection module are included. The rotating blowout preventer assembly includes a housing and a rotating sealing assembly, the housing is provided with a main through hole and a bypass outlet, the rotating sealing assembly is arranged in the main through hole, and the bypass outlet is connected with a straight-through cut-off valve. The flow detection module includes a flow meter, a first flow cut-off valve and a second flow cut-off valve; the flow meter extends upward in the direction of the main through hole, the first flow cut-off valve and the second flow cut-off valve are arranged at two ends of the flow meter respectively and communicate with the flow meter; an inlet of the flow meter is a flow detection input interface, the flow detection input interface communicates with the straight-through cut-off valve; an outlet of the second flow cut-off valve is a flow detection output interface.

2. The rotating blowout preventer with flow detection function according to claim 1, characterized in that, The first flow cut-off valve and the second flow cut-off valve are oppositely arranged, and a double-output actuator is arranged between the first flow cut-off valve and the second flow cut-off valve to drive the first flow cut-off valve and the second flow cut-off valve to be in an open-close state.

3. The rotating blowout preventer with flow detection function according to claim 2, characterized in that, The double-output actuator is an electric drive structure.

4. The rotating blowout preventer with flow detection function according to claim 3, characterized in that, A manual drive mechanism is further arranged on the electric drive structure.

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