A throttling and pressure control integrated manifold

Abstract

The present invention discloses a throttling pressure control integrated manifold, which relates to the field of well control technology. The present invention includes an adjustable bottom skid, two throttling manifolds are arranged at the top of the adjustable bottom skid, a manifold inlet is arranged between the two throttling manifolds, and a manifold outlet assembly is arranged on one side of the two throttling manifolds; two pressure control manifolds are arranged on the top of the throttling manifold, an electric plunger pressure control valve is arranged on one side of the pressure control manifold, a mass flow meter is installed on one side of one of the pressure control manifolds, the throttling manifold and the pressure control manifold are electrically connected to an electric control cabinet, the electric control cabinet is electrically connected to the mass flow meter, and the throttling manifold is provided with an electric wedge-shaped throttling valve, which is used to cooperate with the electric control cabinet to prevent erosion of the inner pipe of the throttling manifold. The present invention realizes precise pressure control of the inner pressure of the manifold and effectively prevents erosion of the pipe wall by arranging two groups of throttling manifolds and pressure control manifolds controlled by the electric control cabinet, and cooperating with an electric wedge-shaped throttling valve with a wedge surface.

Description

Technical Field

[0001] The invention relates to the technical field of well control, and in particular to a throttling and pressure control integrated manifold. Background Art

[0002] Well control refers to well kick control or pressure control. Oilfield well control technology is to effectively control the formation pressure through the adoption of certain technologies, thereby ensuring the basic balance of pressure in the well and ensuring the normal progress of oilfield operations. The application of oilfield well control technology can not only effectively prevent blowouts, but also protect oil and gas layers, and plays an important role in avoiding damage to resources and environmental pollution. The throttle manifold is one of the important facilities in the well control device. It is necessary equipment to ensure the successful control of well kicks and the realization of oil and gas well pressure control technology. The throttle manifold implements well pressure killing operations through the throttling effect of the throttle valve, replaces the contaminated mud in the well, controls the wellhead casing pressure and riser pressure, and restores the pressure control of the mud liquid column on the wellhead. Therefore, the throttle manifold plays a vital role in safe production.

[0003] The existing throttle manifold cannot effectively control the return slurry pressure due to the high well control pressure. After the fluid passes through the throttle valve, the jet generated causes erosion and wear to certain relatively fixed areas on the inner wall of the throttle manifold, that is, it causes erosion and wear of the throttle valve core and the inner wall of the downstream manifold. In severe cases, the valve core may even fail due to erosion and the manifold may be punctured, resulting in strong erosion of the drilling fluid. Summary of the invention

[0004] The purpose of the present invention is to provide a throttling pressure control integrated manifold, and the technical problems to be solved are as follows: the well control pressure of the existing throttling manifold is uncontrollable when in use, and the drilling fluid has strong erosion effect on the inner wall of the manifold.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A throttling and pressure-control integrated manifold comprises an adjustable skid, wherein two throttling manifolds are arranged at the top of the adjustable skid, a manifold inlet is arranged between the two throttling manifolds, and a manifold outlet assembly is arranged on one side of the two throttling manifolds; two pressure-controlling manifolds are arranged on the top of the throttling manifold, an electric plunger-type pressure-controlling valve is arranged on one side of the pressure-controlling manifold, a mass flowmeter is installed on one side of one of the pressure-controlling manifolds, the throttling manifold and the pressure-controlling manifold are electrically connected to an electric control cabinet, the electric control cabinet is electrically connected to the mass flowmeter, and the throttling manifold is provided with an electric wedge-shaped throttling valve for cooperating with the electric control cabinet to prevent erosion of an inner tube of the throttling manifold.

[0007] As a further solution of the present invention: the electric bolt-type pressure control valve includes an electric plunger-type pressure control valve 1 and an electric plunger-type pressure control valve 2, and they are respectively installed on one side of the two pressure control manifolds; the electric wedge-shaped throttle valve includes an electric wedge-shaped throttle valve 1 and an electric wedge-shaped throttle valve 2, and they are respectively installed on one side of the two throttling manifolds.

[0008] As a further solution of the present invention: the manifold outlet assembly includes manifold outlet one and manifold outlet three, the manifold outlet one and the manifold outlet three are respectively installed at the adjacent throttling manifolds, and a manifold outlet two is arranged on one side between the two throttling manifolds, and the manifold outlet two is used for blowout prevention.

[0009] As a further solution of the present invention: a three-way valve is installed on one side of the electric wedge throttle valve 1, a six-way valve is installed on the inner side of the manifold inlet, a four-way valve is installed between the two pressure control manifolds, and the four-way valve is connected to the manifold outlet 2.

[0010] As a further solution of the present invention: a flange short-circuit is installed on one side of the electric wedge-shaped throttle valve 2, and the other side is connected to the six-way valve, a five-way valve is installed on one side of the flange short-circuit, a right-angle two-way valve is installed on the top of the five-way valve, a flange straight pipe is installed on one side of the right-angle two-way valve, a flange-type right-angle two-way valve is installed on one side of the flange straight pipe, and the flange-type right-angle two-way valve is connected to the pressure control manifold on the adjacent side.

[0011] As a further solution of the present invention: one side of the electric wedge-shaped throttle valve 1 is connected with the manifold outlet 1, the electric wedge-shaped throttle valve 1 includes an inlet connected with the six-way port, one side of the inlet is provided with an outlet, the outlet is connected to the throttling manifold on the adjacent side, one side of the outlet is fixedly connected with a flow plate, the middle part of the flow plate is provided with a flow control port, one side of the inlet is provided with a flow control column, one side of the flow control column is connected with a shift column, a fastening bolt is fixedly connected between the shift column and the flow control column, a shift screw is threadedly connected to the inside of the shift column, the shift screw is sleeved with a bearing, one side of the shift screw is fixedly connected with a driving gear, and a sealing ring is installed between the flow control column and the inlet.

[0012] As a further solution of the present invention: a wedge surface is provided at one end of the flow control column.

[0013] As a further solution of the present invention: the two throttling manifolds and the two pressure control manifolds are both installed with a plurality of electric flat gate valves.

[0014] As a further solution of the present invention: the electric control cabinet is electrically connected to an intelligent control system for a well control device, and the intelligent control system for the well control device is provided with a manual-automatic electric actuator at each of the electric flat gate valves and the electric wedge-shaped throttle valves.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, two electric wedge-shaped throttle valves and two electric plug-type pressure control valves are provided, two groups of throttle manifolds are provided at the top of the adjustable bottom skid, and two groups of pressure control manifolds are adapted and connected at the top of the throttle manifolds, and an electric wedge-shaped throttle valve is installed for each throttle manifold, and initial pressure control is achieved by regulating the electric wedge-shaped throttle valve, and an electric plunger-type pressure control valve is installed for each pressure control manifold, and secondary pressure control can be performed after the initial pressure control, thereby achieving a secondary pressure control effect on the return slurry fluid, effectively preventing damage to the pipeline due to overpressure and preventing overflow;

[0017] 2. Since the two groups of throttling manifolds and the two groups of pressure-controlling manifolds are in use and standby states respectively, when overpressure occurs in one group of throttling manifolds in combination with the pressure-controlling manifold, the standby group can be activated to avoid erosion of the pipeline caused by long-term overpressure. Furthermore, a flow control column with a wedge surface is provided inside the electric wedge-shaped throttle valve, so that the fluid can be conducted along the wedge surface when turning, preventing the erosion of the inner wall of the manifold by direct impact, thereby extending the service life of the manifold. Furthermore, a second manifold outlet is provided in the middle of the two throttling manifolds, which is used for the blowout outlet for fluid discharge in extreme situations. Together with the main and standby manifold outlets, the probability of excessive internal pressure in the manifold is greatly reduced, thereby avoiding the erosion of the manifold by excessive internal pressure in the pipeline.

[0018] 3. In the present invention, by setting an electric control cabinet and a mass flow meter, which are electrically connected to the intelligent control system of the well control device, the control functions of the two groups of throttling manifolds and the two groups of air compressor manifolds are integrated, and by issuing instructions to the manual-automatic electric actuators installed on the electric flat gate valve and the electric wedge throttle valve, remote control of the valve system is achieved. The real-time monitoring of valve control facilitates precise pressure control, which can solve the overpressure problem in time and avoid the erosion of the pipeline due to excessive pressure. At the same time, the automation level and operation safety of the well control device are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a side structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0023] Figure 4 It is a partial structural schematic diagram of an electric wedge-shaped throttle valve 1 of the present invention;

[0024] Figure 5 The present invention Figure 4 Schematic diagram of the internal structure.

[0025] In the figure: 1. adjustable bottom skid; 2. electric control cabinet; 3. three-way; 4. electric wedge-shaped throttle valve 1; 5. electric plunger pressure control valve 1; 6. six-way; 7. four-way; 8. electric plunger pressure control valve 2; 9. mass flow meter; 10. right-angle two-way; 11. flange straight pipe; 12. electric flat gate valve; 13. five-way; 14. flange right-angle two-way; 15. flange short circuit; 16. electric wedge-shaped throttle valve 2; 17. manifold inlet; 18. manifold outlet 1; 19. manifold outlet 2; 20. manifold outlet 3; 21. outlet; 22. inlet; 23. flow plate; 24. flow control port; 25. flow control column; 26. wedge surface; 27. sealing ring; 28. shift column; 29. ​​fastening bolt; 30. shift screw; 31. bearing; 32. driving gear. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 5 As shown, a throttling pressure control integrated manifold comprises an adjustable bottom skid 1, two throttling manifolds are arranged on the top of the adjustable bottom skid 1, a manifold inlet 17 is arranged at the middle connection of the two throttling manifolds, a manifold outlet assembly is arranged on one side of the two throttling manifolds, two pressure control manifolds are arranged on the top of the throttling manifold, an electric plunger pressure control valve is arranged on the pressure control manifold, a mass flow meter 9 is installed on one side of one of the pressure control manifolds, an electric control cabinet 2 is arranged between the throttling manifold and the pressure control manifold on one side of the adjustable bottom skid 1, the electric control cabinet 2 is electrically connected to the mass flow meter 9, and the throttling manifold is provided with an electric wedge throttling valve for cooperating with the electric control cabinet 2 to prevent erosion of the inner tube of the throttling manifold.

[0028] It should be noted that the adjustable skid 1 is a steel frame structure, and eight support feet are arranged at the bottom (see Figure 2 ), which provides an integrated take-over platform for the throttle manifold and the pressure control manifold, which can greatly reduce the space occupied by the well site, and the well-supported padding structure also facilitates the layout and transfer according to complex working conditions on site, with the functions of saving space and facilitating transfer;

[0029] The two throttling manifolds can be divided into left and right throttling manifolds according to the spatial layout. The one close to the electric control cabinet 2 is a spare pipeline. The manifold inlet 17 installed between the two throttling manifolds is the inlet of the downhole mud column fluid. Two pressure control manifolds are arranged correspondingly on the upper layers of the two throttling manifolds. Similarly, one of the pressure control manifolds is a spare. The pressure control manifold with a mass flowmeter 9 installed is connected to the throttling manifold at the bottom as the manifold passage for normal use. It has the function of measuring flow. When metering is not required or the spare passage is used, the spare road side is used.

[0030] The electric bolt-type pressure control valve includes an electric plunger-type pressure control valve 1 5 and an electric plunger-type pressure control valve 2 8. The two pressure control valves are respectively installed on one side of the two pressure control manifolds to control the fluid pressure in the pressure control manifolds. The electric wedge-shaped throttle valve includes an electric wedge-shaped throttle valve 1 4 and an electric wedge-shaped throttle valve 2 16. The two throttle valves are respectively installed on one side of the two throttle manifolds to control the erosion effect of the fluid in the manifold on the inner wall of the pipeline. Specifically, the maximum rated working pressure of the two pressure control valves can reach 175MPa.

[0031] Manifold outlet assembly (see Figure 3 ) includes a manifold outlet 18 and a manifold outlet 3 20, which respectively correspond to the throttling manifolds on the connected side, and are used to release the liquid column after pressure and flow control. A manifold outlet 2 19 is set in the middle between the two throttling manifolds, which is used for incremental release of the liquid column when the flow is too large, and is used as a blowout prevention outlet.

[0032] A tee 3 is installed on one side of the electric wedge throttle valve 4 for connecting with the throttling manifold on the adjacent side. A six-way 6 is installed on the inner side of the manifold inlet 17. The six interfaces of the six-way 6 correspond to the two interfaces connecting the two throttling manifolds, the interface connecting with the manifold outlet 2 19 on the adjacent side, the two interfaces connecting with the two pressure control manifolds on the top layer, and the interface connected with the manifold inlet 17. A four-way 7 is installed between the two pressure control manifolds. The four-way 7 is connected with the manifold outlet 2 19 and is used to connect the connecting passage between the pressure control manifold on the top layer and the blowout prevention outlet at the bottom.

[0033] A flange short-circuit 15 is installed on one side of the electric wedge-shaped throttle valve 2 16, and the other side is connected with the six-way valve 6, a five-way valve 13 is installed on one side of the flange short-circuit 15, a right-angle two-way valve 10 is installed on the top of the five-way valve 13, a flange straight pipe 11 is installed on the other side of the right-angle two-way valve 10, a flange-type right-angle two-way valve 14 is installed on one side of the flange straight pipe 11, and the flange-type right-angle two-way valve 14 is connected with the pressure control manifold on the adjacent side, that is, the flange straight pipe 11 and the flange-type right-angle two-way valve 14 are connected in sequence through the right-angle two-way valve 10 to achieve the connection between the side throttling manifold and the pressure control manifold, wherein external interfaces are respectively arranged on both sides of the five-way valve 13, one side is connected with the throttling manifold at the bottom, the top is connected with the right-angle two-way valve 10, and an interface is arranged on the inside to be connected with the blowout prevention manifold outlet 2 19.

[0034] The two throttling manifolds and the two pressure control manifolds are both installed with a plurality of electric flat gate valves 12. Specifically, the present invention uses three types of electric flat gate valves 12, each with a specification and quantity of ten pieces of 78-70, six pieces of 103-35 and six pieces of 103-70, for corresponding regulation of the connectivity status of each pipeline.

[0035] like Figure 4 and Figure 5 As shown, one side of the electric wedge-shaped throttle valve 4 is connected to the manifold outlet 18, and the electric wedge-shaped throttle valve 4 includes an inlet 22 connected to the six-way 6, and an outlet 21 is arranged on one side of the inlet 22, and the outlet 21 is connected to the throttling manifold on the adjacent side, and a flow plate 23 is fixedly connected to one side of the outlet 21, and a flow control port 24 is arranged in the middle of the flow plate 23, and a flow control column 25 is installed at the top of the inlet 22, and a shift column 28 is connected to the top of the flow control column 25, and the shift column 28 and the flow control column 25 are connected by a fastening bolt 29, and a shift screw 30 is threadedly connected to the inside of the shift column 28, and a bearing 31 is sleeved on the outer side of the top of the shift screw 30, and a driving gear 32 is fixedly connected to the top of the shift screw 30, and a sealing ring 27 is installed between the flow control column 25 and the inlet 22;

[0036] It should be noted that the electric wedge-shaped throttle valve 1 4 and the electric wedge-shaped throttle valve 2 16 have the same structure. The electric wedge-shaped throttle valve 2 16 is used to communicate with the manifold outlet 3 20, and is used to buffer the inner wall erosion of the two throttle manifolds in the use state and the standby state. The electric wedge-shaped throttle valve 2 16 is located outside the top of the driving gear 32 and is also connected to a driving motor (see Figure 1), the driving motor provides rotational power for the driving gear 32, and under the auxiliary rotation of the bearing 31, the shift screw 30 rotates accordingly, and during the rotation, the shift column 28 connected to the bottom thread is driven to reciprocate, and the reciprocating direction is related to the forward and reverse rotation of the driving motor. The rotation of the shift column 28 drives the movement of the flow control column 25 connected thereto, and the bottom end of the flow control column 25 is connected to the flow control port 24. By moving the distance between the bottom end of the flow control column 25 and the flow control port 24, the flow rate of the flow channel is controlled. In addition, since the two electric wedge-shaped throttle valves correspond to the connecting manifold outlet 18 and the manifold outlet 3 20 respectively, it can control the flow pressure of the corresponding throttling manifold by controlling the flow rate, that is, it has a pressure relief effect to prevent overpressure from damaging the pipeline and overflow;

[0037] Furthermore, a wedge surface 26 is provided at the bottom of the flow control column 25 (see Figure 5 );

[0038] It should be noted that, since the contact surface between the bottom surface of the flow control column 25 and the flow control port 24 is a wedge surface 26, that is, its cross section is wedge-shaped, the flow rate and pressure of the fluid can be adjusted by changing the flow rate of the flow plate 23. When the opening of the flow control port 24 at the flow plate 23 increases, the flow rate of the fluid will also increase accordingly, and vice versa, the flow rate will be reduced. The wedge-shaped cross-section setting can reduce the resistance and pressure loss of the fluid when it passes through the flow plate 23, and can also reduce the occurrence of cavitation. Specifically, cavitation refers to the local evaporation of the internal water-containing part due to the rapid decrease in pressure when the mud column flows at a high speed, forming bubbles, which are transferred from the inlet 22 to the outlet. In the process of passing through the flow control port 21, the pressure is high due to the small cross-flow area when passing through the flow plate 23. At this time, the bubbles will burst quickly, and the burst will produce vibration. Frequent vibration will cause resonance in the manifold, thereby damaging the manifold. The wedge surface can reduce the influence of cavitation. When the fluid passes through the control flow port 24, it can be guided to the outlet 21 along the wedge surface 26, thereby reducing the contact and erosion area between the high-speed fluid and the downstream manifold wall when passing through the throttling manifold, so as to achieve the purpose of reducing the erosion of the throttling manifold wall by the fluid and prolonging the service life of the throttling manifold. In addition, the bushing connected to the drive motor of the electric wedge throttling valve 4 is an alloy bushing, which is used to enhance its structural strength.

[0039] In addition, the electric control cabinet 2 is electrically connected to the intelligent control system of the well control device. The intelligent control system of the well control device integrates the control functions of the two throttling manifolds and the two pressure control manifolds. Specifically, the fluid is injected through the manifold inlet 17, and the pressure is controlled by one of the electric wedge-shaped throttling valves before entering the mass flow meter 9 on the upper layer, thereby realizing the online monitoring function of the quality and density of the slurry returned from the throttling manifold. In actual use, a control interface can be established according to the actual installation situation of the on-site intelligent control system of the well control device to realize remote control and online monitoring functions, thereby improving the automation degree and intrinsic safety of the well control device. It should be noted that the intelligent control system of the well control device is equipped with a manual-automatic electric actuator for each electric flat gate valve 12 and electric wedge-shaped throttle valve for remote valve control.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A throttling and pressure control integrated manifold, characterized in that: The adjustable bottom skid (1) comprises two throttling manifolds arranged at the top of the adjustable bottom skid (1), a manifold inlet (17) being arranged between the two throttling manifolds, and a manifold outlet assembly being arranged on one side of the two throttling manifolds; a pressure control manifold being arranged at the top of the throttling manifold, an electric plunger-type pressure control valve being arranged on one side of the pressure control manifold, a mass flow meter (9) being installed on one side of one of the pressure control manifolds, the throttling manifold and the pressure control manifold being electrically connected to an electric control cabinet (2), the electric control cabinet (2) being electrically connected to the mass flow meter (9), and the throttling manifold being provided with an electric wedge-shaped throttling valve for cooperating with the electric control cabinet (2) to prevent erosion of the inner tube of the throttling manifold; The electric plunger pressure control valve comprises an electric plunger pressure control valve 1 (5) and an electric plunger pressure control valve 2 (8), and is respectively installed on one side of the two pressure control manifolds; the electric wedge throttle valve comprises an electric wedge throttle valve 1 (4) and an electric wedge throttle valve 2 (16), and is respectively installed on one side of the two throttle manifolds; The manifold outlet assembly includes a manifold outlet 1 (18) and a manifold outlet 3 (20), wherein the manifold outlet 1 (18) and the manifold outlet 3 (20) are respectively installed at the adjacent throttling manifolds, and a manifold outlet 2 (19) is provided on one side between the two throttling manifolds, and the manifold outlet 2 (19) is used for spraying; A three-way connection (3) is installed on one side of the electric wedge-shaped throttle valve (4), and a six-way connection (6) is installed on the inner side of the manifold inlet (17). The six interfaces of the six-way connection (6) respectively correspond to two interfaces connected to the two throttling manifolds, an interface connected to the manifold outlet (19) on the adjacent side, two interfaces connected to the two pressure-control manifolds on the top layer, and an interface connected to the manifold inlet (17). A four-way connection (7) is installed between the two pressure-control manifolds, and the four-way connection (7) is connected to the manifold outlet (19). A flange short-circuit (15) is installed on one side of the second electric wedge-shaped throttle valve (16), and the other side is connected to the six-way (6); a five-way (13) is installed on one side of the flange short-circuit (15); a right-angle two-way (10) is installed on the top of the five-way (13); a flange straight pipe (11) is installed on one side of the right-angle two-way (10); a flange right-angle two-way (14) is installed on one side of the flange straight pipe (11); the flange right-angle two-way (14) is connected to the pressure control manifold on the adjacent side; The two throttling manifolds and the two pressure control manifolds are both equipped with a plurality of electric flat gate valves (12).

2. The throttling and pressure control integrated manifold according to claim 1, characterized in that: One side of the electric wedge-shaped throttle valve (4) is in communication with the manifold outlet (18), and the electric wedge-shaped throttle valve (4) comprises an inlet (22) in communication with the six-way (6), one side of the inlet (22) is provided with an outlet (21), the outlet (21) is connected to the throttling manifold on the adjacent side, one side of the outlet (21) is fixedly connected to a flow plate (23), the middle of the flow plate (23) is provided with a flow control port (24), and one side of the inlet (22) is provided with a flow control port (24). A flow control column (25) is provided, one side of the flow control column (25) is connected to a displacement column (28), a fastening bolt (29) is fixedly connected between the displacement column (28) and the flow control column (25), a displacement screw (30) is threadedly connected inside the displacement column (28), a bearing (31) is sleeved on the displacement screw (30), one side of the displacement screw (30) is fixedly connected to a driving gear (32), and a sealing ring (27) is installed between the flow control column (25) and the flow inlet (22).

3. The throttling and pressure control integrated manifold according to claim 2, characterized in that: A wedge surface (26) is provided at one end of the flow control column (25).

4. The throttling and pressure control integrated manifold according to claim 1, characterized in that: The electric control cabinet (2) is electrically connected to a well control device intelligent control system, and the well control device intelligent control system is provided with a manual-automatic electric actuator at each of the electric flat gate valves (12) and the electric wedge-shaped throttle valves.

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