210MPa graded depressurization throttle manifold

Abstract

The invention relates to a 210MPa graded depressurization throttle manifold, which consists of a main body pipe valve piece, an adjustable bracket, a skid base and a threaded connecting piece, two ends of the main body pipe valve part respectively take a short section and a square five-way part as an inlet and an outlet, and the inlet and the outlet are connected by using the same pipe valve part to form two throttling pipelines for graded pressure reduction; each throttling pipeline is formed by combining two short sections, two square tee joints, two flat valves, four throttling valves connected in series in the middle and an instrument flange; threaded flanges, round pipe plugs, double male joints, gauge valves and pressure gauges are arranged above the square five-way joints at the two ends; and double male joints, instrument valves and pressure gauges are arranged above the two instrument flanges. The adjustable supports are respectively supported below the four square tee joints and the flanges which are in butt joint with the two groups of throttling valves which are connected in series, and the flat valves, the throttling valves and the instrument valves which are used are all patent new products, so that the pressure reducing and throttling device has the advantages in technology and performance while having the pressure reducing and throttling functions.

Description

Technical Field

[0001] This invention relates to petroleum machinery and throttling manifolds in oil and gas drilling and production equipment. Background Technology

[0002] As the focus of onshore oil and gas resource development in my country shifts to the western regions, oil and gas wells are being drilled deeper and deeper, with increasingly higher working pressures, leading to a greater demand and wear of ultra-high pressure choke manifolds. Currently, the highest working pressure generated during drilling has reached 210 MPa. Such ultra-high pressure sand-bearing fluids are not only extremely destructive to drilling and production equipment, but also pose extremely high safety risks should leaks or blowouts occur. Therefore, designing a staged pressure-reducing choke manifold can significantly reduce the pressure and flow rate of ultra-high pressure sand-bearing fluids with relatively little additional investment, thereby minimizing damage to drilling and production equipment and the environment. Summary of the Invention

[0003] The purpose of this invention is to develop a throttling manifold that can withstand an ultra-high working pressure of 210MPa and can rapidly reduce fluid pressure and flow.

[0004] This invention comprises a main pipe valve assembly, an adjustable bracket, a skid base, and threaded connectors. Its key feature is that the main pipe valve assembly has a short section and a square tee at each end as the inlet and outlet, respectively. The inlet and outlet are connected by identical pipe valves to form two graded pressure-reducing throttling pipelines. Each throttling pipeline consists of two short sections connected to the square tee at each end of the inlet and outlet, two square tees, two flat valves, four throttling valves connected in series in the middle, and an instrument flange. Above the square tee at each end are threaded flanges, round pipe plugs, double male connectors, instrument valves, and pressure gauges. Above the two instrument flanges are also double male connectors, instrument valves, and pressure gauges. Except for the direct threaded connection between the round pipe plug, double male connector, instrument valve, and pressure gauge, all other components of the main pipe valve assembly are fixedly connected using sealing gaskets and stud nuts.

[0005] The adjustable brackets are divided into two types: tray brackets and clamp brackets, with four of each. The tray brackets are supported below the four square tees in the main pipe valve, and the clamp brackets are supported at intervals below the flanges of the two sets of four throttle valves connected in series in the main pipe valve. The adjustable brackets are connected and fixed as a whole with the main pipe valve and the skid base by studs and nuts.

[0006] Furthermore, the flat plate valves used in this invention are all "a tailless manual rising stem flat plate valve adapted to ultra-high pressure conditions", Chinese Patent No.: ZL202121448963.X; the throttle valves used are all "a wedge-type manual throttle valve with a concave arc surface", Chinese Patent No.: ZL201720523338.4; and the instrument valves used are all "a universal instrument valve that is easy to observe", Chinese Patent No.: ZL202322812720.5.

[0007] Because the main pipe fittings of this invention have two throttling pipelines, they can be operated and maintained alternately, thus ensuring the continuity of drilling and production operations. Each throttling pipeline uses four throttling valves connected in series to progressively reduce pressure and flow, significantly lowering fluid pressure and flow rate to mitigate harm to downstream equipment or the environment. Instrument valves and pressure gauges are installed above the square five-way connectors at the inlet and outlet, and in the middle of the throttling valve assembly, allowing for accurate observation of pressure reduction, throttling, and adjustment. The flat valves used in the main pipe fittings are all stemless, manually operated flat valves with rising stems, suitable for ultra-high pressure conditions. These valves not only have advantages such as small size and low height, but also utilize bevel gear reducers for drive, significantly reducing the operating resistance of ultra-high pressure valves. The throttling valves used are all wedge-type manual throttling valves with concave arc surfaces, characterized by accurate control and durability. The instrument valves used are all universal instrument valves that are easy to observe, allowing for arbitrary adjustment of the pressure gauge direction for convenient observation and operation by on-site personnel. Furthermore, both types of brackets used in this invention are adjustable, allowing for convenient height adjustment without the need for a crane, thus facilitating connection with other equipment. Therefore, this invention is not only inventive but also technologically advanced. Attached Figure Description

[0008] Figure 1 This is a top view schematic diagram of the overall structure of the present invention with partial cross-section;

[0009] Figure 2 This is a left-side view of the overall structure of the present invention;

[0010] Figure 3 This is a fully enlarged cross-sectional view of the overall structure of the flat plate valve component in this invention;

[0011] Figure 4 This is a fully enlarged cross-sectional view of the overall structure of the throttle valve component in this invention;

[0012] Figure 5 This is a fully enlarged cross-sectional view of the assembly of the threaded flange, round pipe plug, double male connector, instrument valve and pressure gauge in this invention.

[0013] Figure 6 This is a fully enlarged cross-sectional view of the overall structure of the tray support component in this invention;

[0014] Figure 7 This is a fully enlarged cross-sectional view of the overall structure of the clamp bracket component in this invention.

[0015] The component names shown by the numbers in the attached diagram are as follows:

[0016] 1. Short section, 2. Square bottom joint, 3. Square tee, 4. Flat plate valve, 5. Throttling valve, 6. Instrument flange, 7. Blind flange, 8. Sealing gasket, 9. Stud nut, 10. Pallet bracket, 11. Clamp bracket, 12. Skid base, 13. Threaded flange, 14. Round pipe plug, 15. Double male connector, 16. Instrument valve, 17. Pressure gauge. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 , Figure 2 This invention comprises a main pipe fitting, multiple adjustable supports, a skid base, and threaded connectors. Specifically, the main pipe fitting has a short section 1 and a square bottom bracket 2 at each end as the inlet and outlet, respectively. These inlets and outlets are connected by identical pipe fittings to form two graded pressure-reducing throttling pipelines for alternating operation and maintenance. Each throttling pipeline consists of two short sections 1 connected to the square bottom brackets 2 at the inlet and outlet ends, two square tees 3, two flat valves 4, four throttling valves 5 connected in series in the middle, and an instrument flange 6. The two flat valves 4 are responsible for opening or closing the throttling pipeline, and the four throttling valves 5 are responsible for progressively reducing pressure and throttling. Above each of the square bottom brackets 1 at both ends, a threaded flange 13, a round pipe plug 14, a double male connector 15, an instrument valve 16, and a pressure gauge 17 are installed. Above each of the two instrument flanges 6, a double male connector 15, an instrument valve 16, and a pressure gauge 17 are also installed to display pressure changes in the pipeline. In the main pipe and valve components, except for the round pipe plug 14, double male connector 15, instrument valve 16 and pressure gauge 17 which are directly connected by threads, the other components are fixedly connected by sealing gaskets 8 and stud nuts 9 to ensure the reliability of the seal.

[0019] The sealing gasket 8 used in this invention comes in two sizes: the smaller diameter sealing gasket 8 is used only for sealing the connection between the square bottom bracket 2 and the threaded flange 13, while the larger diameter sealing gasket 8 is used for sealing the connection between other components in the main pipe valve. The studs and nuts 9 used in this invention come in four stud lengths to allow selection based on the connected components and their locations.

[0020] Figure 3 , Figure 4 and Figure 5The flat plate valves used in this invention are all "a type of manual rising stem flat plate valve without tail rod adapted to ultra-high pressure conditions", Chinese patent number: ZL202121448963.X. They mainly employ a manual bevel gear actuator to overcome the valve opening and closing resistance caused by ultra-high pressure, and use composite material sealing rings to improve their pressure resistance. The throttle valves used are all "a type of arc-shaped concave wedge-type manual throttle valve", Chinese patent number: ZL201720523338.4. They mainly employ an arc-shaped concave wedge-shaped valve core, valve seat, and anti-wear sleeve made of hard alloy material to extend their service life, and use a "T"-shaped pressure balance hole to reduce their operating resistance. The instrument valves used are all "a universal instrument valve for easy observation", Chinese patent number: ZL202322812720.5. They mainly add two rotary joints to the instrument valve, allowing the pressure gauge to be turned arbitrarily without leakage, facilitating observation.

[0021] Figure 2 , Figure 6 and Figure 7 In this invention, the adjustable brackets are divided into two types: tray brackets 10 and clamp brackets 11, with four of each. The tray brackets 10 are respectively supported below the four square tees 3 in the main pipe valve fitting, and the clamp brackets 11 are respectively supported at intervals below the flanges of two sets of four throttle valves 5 connected in series in the main pipe valve fitting. The two types of adjustable brackets are connected and fixed to the main pipe valve fitting and the skid base 12 into a whole by studs and nuts 9. The tray brackets 10 and clamp brackets 11 have the same bracket base, adjusting screw, locking nut, drive handle and lifting sleeve. The difference is that the upper part of the tray bracket 10 is welded to the lifting sleeve with a perforated tray plate, while the upper part of the clamp bracket 11 is welded to the lifting sleeve with the lower half of a pair of clamps. The bracket base is a square steel plate with holes at the four corners, with a support sleeve and four reinforcing ribs welded to its center. The upper half of the center hole of the support sleeve is machined into a left-hand internal thread for connecting the adjusting screw. The adjusting screw consists of a flat cylinder with four radially threaded holes evenly distributed around its circumference, a left-handed screw at the bottom, and a right-handed screw at the top. A relief groove is present at the junction of the upper and lower screws with the flat cylinder. The screws with different directions of rotation at each end are connected to a locking nut, a lifting sleeve, and a support base, respectively. The locking nut is a flat, hollow cylindrical part, one at the top and one at the bottom, with four radially threaded holes evenly distributed around its circumference. The center holes are machined with left-handed and right-handed threads, respectively, and are used to install the upper and lower ends of the adjusting screw. The drive handle is a section of smooth round steel, chamfered at one end and machined into a screw head at the other. It is installed in the radially threaded holes of the adjusting screw and locking nut for easy operation by on-site personnel. The lifting sleeve is a hollow cylindrical part, with the lower half of its center hole machined with a right-handed thread, connecting to the adjusting screw. Its upper end is welded to the lower half of either a perforated support plate or a clamp, forming a support plate bracket 10 or a clamp bracket 11.

[0022] The skid base 12 of this invention uses channel steel welded into a rectangular frame. A patterned steel plate is welded onto the top of the rectangular frame. At both ends of the skid base 12 protruding along its length, a round steel pipe symmetrically extends horizontally, with the length of the round steel pipe protruding beyond the outer edge of the frame. After being welded to the frame, a round baffle is welded to each end of the round steel pipe for lifting with rigging. Corresponding stud holes are drilled at the connection points between the patterned steel plate and the frame on the skid base 12 and the eight adjustable supports for connection and fixation with stud nuts 9.

[0023] When using the eight adjustable supports to adjust the height of the main pipe valves, it is best to have multiple people operate simultaneously and check the levelness of the main pipe valves or the verticality of the external flange face. The square five-way connector 2 and short section 1 at the front inlet end of this invention are connected to the source equipment or pipeline, and the square five-way connector 2 and short section 1 at the rear outlet end are connected to the subsequent equipment or pipeline. Close the two flat valves at the front and rear of one of the pressure-reducing and throttling pipelines as a backup pipeline. Open all the flat valves and throttling valves in another pressure-reducing and throttling pipeline to the fully open position, starting from the last throttling valve in the opened pressure-reducing and throttling pipeline, slowly adjusting its pressure to the specified discharge value; then slowly adjusting the second-to-last throttling valve, adjusting its pressure to the evenly distributed specified value; continuing to slowly adjust the third-to-last throttling valve, adjusting its pressure to the evenly distributed specified value; finally, slowly adjusting the first throttling valve, adjusting its pressure to the evenly distributed specified value, thus entering the continuous staged pressure-reducing and throttling working state. When the pressure gauge reading in the working pipeline deviates significantly from the specified value, the corresponding throttle valve should be slowly adjusted to make the proportion of pressure reduction in stages more consistent.

Claims

1. A 210MPa graded pressure-reducing throttling manifold, comprising a main pipe valve, an adjustable support, a skid base, and threaded connections, characterized in that: The main pipe fittings have a short section and a square jack at each end as the inlet and outlet, respectively. The inlet and outlet are connected by the same pipe fittings to form two graded pressure-reducing throttling pipelines. Each throttling pipeline consists of two short sections connected to the square jacks at the inlet and outlet at both ends, two square tees, two flat valves, four throttling valves connected in series in the middle, and an instrument flange. Above the square jacks at both ends, threaded flanges, round pipe plugs, double male connectors, instrument valves, and pressure gauges are installed. Above the two instrument flanges, double male connectors, instrument valves, and pressure gauges are also installed. Among the components of the main pipe fittings, except for the round pipe plugs, double male connectors, instrument valves, and pressure gauges which are directly connected by threads, the other components are fixedly connected by sealing gaskets and stud nuts. The adjustable brackets are divided into two types: tray brackets and clamp brackets, with four of each. The tray brackets are supported below the four square tees in the main pipe valve, and the clamp brackets are supported at intervals below the flanges of the two sets of four throttle valves connected in series in the main pipe valve. The adjustable brackets are connected and fixed as a whole with the main pipe valve and the skid base by studs and nuts.

2. The 210MPa staged pressure reduction and throttling manifold according to claim 1, characterized in that: The flat plate valves used are all "a type of tailless manual rising stem flat plate valve adapted to ultra-high pressure conditions", Chinese patent number: ZL202121448963.X.

3. The 210MPa staged pressure reduction and throttling manifold according to claim 1, characterized in that: The throttle valves used are all "a type of wedge-shaped manual throttle valve with a concave arc surface", Chinese patent number: ZL201720523338.

4.

4. The 210MPa staged pressure reduction and throttling manifold according to claim 1, characterized in that: The instrument valves used are all "a universal instrument valve that is easy to observe", Chinese patent number: ZL202322812720.

5.

5. The 210MPa staged pressure reduction and throttling manifold according to claim 1, characterized in that: The pallet bracket and the clamp bracket have the same bracket base, adjusting screw, locking nut, drive handle and lifting sleeve. The difference is that the upper part of the pallet bracket is welded to the lifting sleeve with a perforated pallet, while the upper part of the clamp bracket is welded to the lifting sleeve with the lower half of a pair of clamps.

6. The 210MPa staged pressure reduction and throttling manifold according to claim 5, characterized in that: a support plate The adjusting screws in the bracket and clamp bracket are flat cylinders with four radial threaded holes evenly distributed on the circumference in the middle, left-hand screws at the bottom and right-hand screws at the top. There is a relief groove at the junction of the upper and lower screws and the flat cylinder.

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