A type of fracturing venting or oil testing / production throttling manifold

Abstract

A fracturing venting or oil testing / production throttling manifold consists of a main pipe and valve assembly, a fixed support, a skid base, and studs and nuts. The main pipe and valve assembly uses a square five-way valve as the inlet, and two square three-way valves and one square four-way valve as the outlets, forming two throttling lines, one venting line, and one pressure testing line. Of the two throttling lines, one uses a fixed throttling valve and the other uses an adjustable throttling valve. The pressure testing line is equipped with both main and auxiliary pressure gauges. A threaded flange with an internal hexagonal plug is fixed to the inlet end of the square five-way valve and the outlet ends of the square three-way and square four-way valves for external connection. A flat plate valve connects each of the two square three-way valves and the square four-way valve. Furthermore, the flat plate valves, throttling valves, and shut-off buffer valves used are all the latest products, thus ensuring technological advancement and performance reliability while pursuing simplicity, practicality, and reduced drilling and production costs.

Description

Technical Field

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

[0002] Most existing choke manifolds, both domestically and internationally, are designed for pressure control during drilling. Their choke and venting lines typically use dual flat valves in series to control flow, employing adjustable choke valves. This approach suffers from drawbacks such as large size, heavy weight, difficulty in relocation, high price, and high costs, making them unsuitable for pressure control during fracturing fluid venting or well testing after well completion. Therefore, it is essential to design a smaller, more mobile, lower-cost choke manifold specifically for wellhead pressure control during fracturing fluid venting or well testing. Summary of the Invention

[0003] The purpose of this invention is to develop a throttling manifold for fracturing and venting or for oil testing and production.

[0004] This utility model consists of a main pipe valve, a fixed bracket, a sliding base, and studs and nuts. Its distinctive feature is that the main pipe valve uses a square five-way valve as the inlet, two square three-way valves and one square four-way valve as the outlet, forming two throttling pipes, one discharge pipe, and one pressure measuring pipe. Specifically, the two horizontally distributed throttling pipes both start from the square five-way valve and are respectively composed of a flat plate valve, a fixed throttling valve, a buffer pipe, and a square three-way valve; the middle horizontally distributed discharge pipe starts from the square five-way valve... Starting from the 6-way, it consists of a flat valve and a square four-way; a vertically upward pressure testing pipeline, starting from the square five-way, consists of a riser, a flat valve, an instrument flange, a round pipe plug, a double male connector, a shut-off buffer valve, a main pressure gauge, a double male connector, a shut-off valve, and a secondary pressure gauge; at the inlet end of the square five-way and the outlet ends of the two square tees and the square four-way, a threaded flange with an internal hexagonal pipe plug is fixed for external connection; a flat valve connects the two front and rear square tees and the middle square four-way.

[0005] Furthermore, the flat valves used are all "manual rising stem flat valves without tail rods"; the fixed throttle valves used are "a fixed high-pressure throttle valve with easy core replacement" (Chinese Patent Application No.: 202521646604.3); the adjustable throttle valves used are "a needle throttle valve suitable for both high-pressure and ultra-high-pressure drilling and production equipment" (Chinese Patent Application No.: 2025217806273); and the shut-off buffer valves used are "a shut-off buffer valve for fracturing gas wellhead equipment" (Chinese Patent No.: ZL202222186641.3).

[0006] Furthermore, the fixed brackets consist of six pieces. The upper support plates are respectively supported directly below a square five-way valve, a fixed throttle valve, an adjustable throttle valve, two square three-way valves, and a square four-way valve, all of which are connected and fixed by four pairs of studs and nuts. The lower support plates are symmetrically distributed on the skid base and welded together as a whole.

[0007] Because this utility model uses a single flat valve for both throttling and venting pipelines, it significantly reduces the product's size, weight, and cost compared to throttling manifolds controlled by dual valves in series. Furthermore, the flat valves used are all "tailless manual rising stem flat valves," which are small, lightweight, and inexpensive, making them more suitable for venting operations that start at ultra-high pressure and later transition to high pressure. The simple design, with a fixed bracket welded to a skid base, further enhances its practicality. Two throttling pipelines are included, one using a fixed throttling valve and the other an adjustable one, allowing for both throttling and adjustment of the valve diameter to suit oil and gas production. Both types of throttling valves use a nut-connected structure for easy disassembly and replacement of worn valve cores and seats, significantly extending valve life. The pressure testing pipeline is equipped with main and auxiliary pressure gauges to accurately display wellhead fluid pressure changes. Therefore, it has the characteristics of simple structure, reliable quality and good use benefits. Attached Figure Description

[0008] Figure 1 This is a top view schematic diagram of the overall structure of this utility model with partial cross-section; Figure 2 This is a left-side view of the overall structure of this utility model; Figure 3 This is a half-section enlarged schematic diagram of the overall structure of the flat plate valve component in this utility model; Figure 4 This is a fully enlarged sectional view of the assembly of the threaded flange, round pipe plug, double male connector, shut-off buffer valve and pressure gauge in this utility model.

[0009] The component names shown by the numbers in the attached diagram are as follows: 1. Square five-way valve; 2. Flat plate valve; 3. Fixed throttle valve; 4. Buffer pipe; 5. Square tee; 6. Square four-way valve; 7. Hexagonal plug; 8. Threaded flange; 9. Stud nut; 10. Sealing gasket; 11. Adjustable throttle valve; 12. Fixed bracket; 13. Skid base; 14. Rise section; 15. Instrument flange; 16. Round pipe plug; 17. Double male connector; 18. Shut-off buffer valve; 19. Main pressure gauge; 20. Shut-off valve; 21. Secondary pressure gauge. Detailed Implementation

[0010] The present invention will be further described below with reference to the accompanying drawings: Figure 1 , Figure 2 In this invention, the main pipe valve assembly consists of a main pipe valve, a fixed bracket 12, a sliding skid base 13, and studs and nuts 9. The main pipe valve assembly uses a square five-way valve 1 as the inlet, two square three-way valves 5 and a square four-way valve 6 as the outlets, forming two throttling pipes, one discharge pipe, and one pressure measuring pipe. Specifically, the two horizontally distributed throttling pipes both start from the square five-way valve 1 and are respectively composed of a flat plate valve 2, a fixed throttling valve 3, a buffer pipe 4, and a square three-way valve 5; or a flat plate valve 2, an adjustable throttling valve 11, a buffer pipe 4, and a square three-way valve 5, which can perform throttling and pressure reduction operations simultaneously or separately. A horizontally distributed venting pipeline, starting from a square quintet 1, consists of a flat valve 2 and a square four-way 6, used for venting in emergencies. A vertically upward pressure testing pipeline, also starting from a square quintet 1, consists of a riser 14, a flat valve 2, an instrument flange 15, a round pipe plug 16, a double male connector 17, a shut-off buffer valve 18, a main pressure gauge 19, a double male connector 17, a shut-off valve 20, and a secondary pressure gauge 21, used to measure changes in wellhead pressure. At the inlet end of the square quintet 1 and the outlet ends of the two square tees 5 and the square four-way 6, a threaded flange 8 with an internal hexagonal pipe plug 7 is fixed for external connection. Removing the internal hexagonal pipe plug 7 allows for external pipeline connection. A flat valve 2 connects the two front and rear square tees 5 and the middle square four-way 6, allowing for either isolation or connection of the three outlets.

[0011] In the main pipe and valve components, except for the round pipe plug 16, double male connector 17, shut-off buffer valve 18, main pressure gauge 19, shut-off valve 20 and auxiliary pressure gauge 21 which are directly connected by thread, the other components are fixedly connected by studs and nuts 9 and sealing gaskets 10 to ensure the reliability of pipeline sealing.

[0012] Figure 3In this invention, the flat valve 2 is a "manual rising stem flat valve without a tail rod"; the valve's open / closed status is indicated by a rising valve stem inside the cover above the handwheel; a pair of anti-sand plates are installed below the valve seat and on both sides of the gate to prevent sand blockage. The fixed throttle valve 3 is a "fixed high-pressure throttle valve with easy-to-replace core", Chinese patent application number: 202521646604.3; it uses a nut to connect the valve body and valve cover, and a hard alloy throttle valve core and anti-wear sleeve are fixed in the valve body with a valve core cover with an elastic sealing ring, which allows for easy replacement of valve cores of different diameters or with wear. The adjustable throttle valve 11 used is "a needle throttle valve that is applicable to both high-pressure and ultra-high-pressure drilling and production equipment", Chinese patent application number: 2025217806273; it uses a union nut to connect the valve body and the valve cover, and a hard alloy valve seat is fixed in the valve body with a valve core cover. The needle valve core is connected to the lower end of the valve stem with a groove and a set screw, which can easily replace the worn valve seat and valve core.

[0013] Figure 4 The shut-off buffer valve 18 used in this utility model is a "shut-off buffer valve for fracturing gas wellhead equipment" (Chinese Patent No. ZL202222186641.3), which has dual functions of on / off switching and buffering, reducing the impact of fluid on the main pressure gauge 19. Other components of this utility model, such as the hexagonal pipe plug 7, threaded flange 8, stud nut 9, sealing gasket ring 10, riser 14, round pipe plug 16, double male connector 17, main pressure gauge 19, shut-off valve 20, and auxiliary pressure gauge 21, are all general-purpose drilling and production equipment components manufactured or purchased according to national standards. The instrument flange 15 used in this utility model is based on the general-purpose threaded flange 8, with a stepped hole with tapered pipe threads drilled on one side of the flange, communicating with the central hole, to connect the shut-off valve 20 and the auxiliary pressure gauge 21 using the double male connector 17. The main pressure gauge 19 used in this invention has a measurement range of 0 to 100 MPa, and the auxiliary pressure gauge 21 has a measurement range of 0 to 16 MPa.

[0014] The fixed bracket 12 of this utility model has a square support plate and a support plate at the top and bottom ends, respectively. Four stud holes are distributed at the four corners of the support plate. The middle is a support steel pipe, and four reinforcing ribs are symmetrically welded at the junction of the support steel pipe and the support plate, with a total of six ribs. The upper support plate is supported directly below a square five-way valve 1, a fixed throttle valve 3, an adjustable throttle valve 11, two square three-way valves 5, and a square four-way valve 6, all of which are connected and fixed by four pairs of stud nuts 9. The lower support plate is symmetrically distributed on the skid base 13 and welded into a whole.

[0015] The sliding base 13 of this utility model is first made of channel steel welded into a rectangular frame. Six fixed brackets 12 are symmetrically welded on the left and right sides of the frame. A layer of patterned steel plate is welded to the blank space on the rectangular frame where there are no fixed brackets. At both ends of the sliding base 13 protruding in the length direction, a round steel pipe is symmetrically passed through. The length of the round steel pipe protrudes 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.

Claims

1. A fracturing venting or oil testing / production throttling manifold, comprising a main pipe valve, a fixed support, a skid base, and studs and nuts, characterized in that: The main piping system consists of one square 5-way valve as the inlet, two square tees and one square four-way valve as the outlets, forming two throttling lines, one venting line, and one pressure testing line. Specifically: the two horizontally distributed throttling lines, each starting from the square 5-way valve, are each composed of one flat valve, one fixed throttling valve, one buffer pipe, and one square tee; the other, a horizontally distributed venting line, starts from the square 5-way valve and consists of one flat valve and one square four-way valve. It consists of: a vertically upward pressure testing pipeline, starting from a square 5-way connector, and consisting of a riser, a flat valve, an instrument flange, a round pipe plug, a double male connector, a shut-off buffer valve, a main pressure gauge, a double male connector, a shut-off valve, and a secondary pressure gauge; at the inlet end of the square 5-way connector and at the outlet ends of the two square tees and one square four-way connector, a threaded flange with an internal hexagonal pipe plug is fixed for external connection; a flat valve connects the two front and rear square tees and the middle square four-way connector.

2. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The flat valves used are all "manual rising stem flat valves without tail rods"; the valve opening and closing status is indicated by a rising valve stem inside the cover above the handwheel, and a pair of sand guards are installed below the valve seat and on both sides of the gate.

3. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The fixed throttle valve used is a fixed high-pressure throttle valve with an easily replaceable core.

4. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The adjustable throttle valve used is a needle-type throttle valve that is suitable for both high-pressure and ultra-high-pressure drilling and production equipment.

5. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The shut-off buffer valve used is a shut-off buffer valve for fracturing gas wellhead equipment.

6. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The instrument flange used is mainly a general threaded flange, with a stepped hole with tapered pipe thread drilled on one side of the flange, which communicates with the center hole.

7. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: The main pressure gauge has a measuring range of 0–100 MPa, and the auxiliary pressure gauge has a measuring range of 0–16 MPa.

8. The fracturing venting or oil testing / production throttling manifold according to claim 1, characterized in that: There are six fixed brackets. The upper support plates are respectively supported under a square five-way valve, a fixed throttle valve, an adjustable throttle valve, two square three-way valves and a square four-way valve, and are all connected and fixed by four pairs of studs and nuts. The lower support plates are symmetrically distributed on the skid base and welded together as a whole.

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