CN111219326A - Low-pressure suction and high-pressure discharge manifold system - Google Patents

Low-pressure suction and high-pressure discharge manifold system Download PDF

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Publication number
CN111219326A
CN111219326A CN202010169884.9A CN202010169884A CN111219326A CN 111219326 A CN111219326 A CN 111219326A CN 202010169884 A CN202010169884 A CN 202010169884A CN 111219326 A CN111219326 A CN 111219326A
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CN
China
Prior art keywords
manifold
pressure
plunger pump
low
discharge
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Pending
Application number
CN202010169884.9A
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Chinese (zh)
Inventor
纪晓磊
张日奎
张鹏
毛明朝
毛竹青
王吉华
王建伟
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Jerry International Inc
American Jereh International Corp
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Jerry International Inc
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Publication date
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Priority to CN202010169884.9A priority Critical patent/CN111219326A/en
Publication of CN111219326A publication Critical patent/CN111219326A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders

Abstract

The invention discloses a low-pressure suction and high-pressure discharge manifold system which comprises a low-pressure manifold, a high-pressure manifold and a plunger pump, wherein the low-pressure manifold is used for inputting a medium into a hydraulic end of the plunger pump, the hydraulic end of the plunger pump is provided with 2 discharge ports, and the 2 discharge ports are connected into the high-pressure manifold. Has the advantages that: the five-cylinder plunger pump with the pressure of more than 5000HP ensures a high-pressure and large-displacement power source of the fracturing equipment. The double-discharge form of the five-cylinder plunger pump realizes smooth liquid discharge of the five-cylinder plunger pump, avoids sand accumulation in the low-pressure manifold and simultaneously ensures large discharge of fracturing equipment. The low-pressure manifold adopts a 10-inch large-drift-diameter manifold, and double suction of a U-shaped pipe realizes sufficient liquid supply with large discharge capacity of the five-cylinder plunger pump.

Description

Low-pressure suction and high-pressure discharge manifold system
Technical Field
The invention relates to the technical field of plunger pump fracturing, in particular to a manifold system for low-pressure suction and high-pressure discharge.
Background
With the continuous development of oil and gas fields, the working conditions of the oil and gas fields are more and more severe, and high-pressure and large-discharge operation is required to meet the mining requirements. And the single fracturing equipment needs to output high pressure and large displacement, and besides enough output power, the low-pressure manifold also needs to input enough fracturing fluid, and the high-pressure manifold can output the fracturing fluid with high pressure and large displacement.
Particularly, in unconventional oil and gas operation, namely shale gas operation, the operation working condition is severe, long-time continuous operation is required besides large-displacement and high-pressure operation, the operation frequency is more and more frequent, and therefore the requirement on fracturing equipment is higher and higher, and the low-pressure manifold and the high-pressure manifold are used as key parts for guaranteeing the large-displacement and high-pressure of the fracturing equipment, so that higher requirements are correspondingly provided for the low-pressure manifold and the high-pressure manifold in order to meet the working condition. The maximum power of the plunger pump in the current market can reach 5000hp and above with the increase of the power and the displacement of the plunger pump, and the maximum displacement even reaches 3m3/min or above. In the face of the requirements of large displacement and high pressure, most of low-pressure manifolds of the conventional fracturing equipment currently use a 5-inch upper liquid manifold, and the manifolds can cause the vibration of the plunger pump and generate impact load under the condition of large displacement working due to the fact that liquid supply is insufficient and the suction is empty, so that the service life of the plunger pump is influenced. The high-pressure manifold is singly discharged by using a plunger pump at home and abroad, namely, liquid is discharged from one end of the plunger pump, and the mode has the defects that: the fracturing operation plunger pump is usually a five-cylinder plunger pump, high-pressure fracturing fluid generated by five cylinders can be discharged from one discharge end, and therefore the phenomenon that the fluid is discharged smoothly, sand is accumulated in a low-pressure manifold and the like can be caused.
Therefore, a manifold system for low-pressure suction and high-pressure discharge, which meets the large-discharge working condition of the whole fracturing equipment, needs to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a low-pressure suction and high-pressure discharge manifold system, which optimizes a high-displacement plunger pump from single discharge to double discharge, solves the problems of unsmooth liquid discharge of a five-cylinder plunger pump, sand accumulation in a low-pressure manifold and the like, ensures sufficient liquid supply under the working condition of high discharge through optimizing a 5 'upper liquid manifold of the low-pressure manifold to a 10' upper liquid manifold, avoids the suction condition of the high-displacement plunger pump, and stably and smoothly works and protects driving of the plunger pump.
The aim of the invention is achieved by the following technical measures: a manifold system for low-pressure suction and high-pressure discharge comprises a low-pressure manifold, a high-pressure manifold and a plunger pump, wherein the low-pressure manifold is used for inputting a medium to a hydraulic end of the plunger pump, the hydraulic end of the plunger pump is provided with 2 discharge ports, and the 2 discharge ports are connected into the high-pressure manifold.
Further, the plunger pump is a five-cylinder plunger pump.
Further, the power of the plunger pump is more than 5000 HP.
Further, the pipe diameter of the low-pressure manifold is more than 10 inches.
Furthermore, the low-pressure manifold comprises a suction manifold, a main manifold and a connecting pipe, wherein the suction manifold is connected with one end of the main manifold, the connecting pipe is arranged on the main manifold, and the other end of the connecting pipe is connected with the hydraulic end of the plunger pump.
Further, the pipe diameters of the suction manifold and the main manifold are more than 10 inches.
Furthermore, the suction manifold comprises a union, a valve, a U-shaped pipe and a connecting elbow, wherein one end of the U-shaped pipe is connected with the union and the valve, and the other end of the U-shaped pipe is connected with the main manifold through the connecting elbow.
Further, the valve is a butterfly valve.
Further, the main manifold includes a buffer and a main line, the buffer is provided between the suction manifold and the connection pipe, and the buffer is connected to the main line.
Furthermore, each connecting pipe is provided with a male union, and the output end of each connecting pipe is connected with the hydraulic end of the plunger pump through a connecting flange.
Further, 2 discharge ports of the plunger pump are respectively arranged on two sides of the hydraulic end in the horizontal direction.
Further, the high-pressure manifold comprises a manifold tee joint, a first elbow, a high-pressure main pipe, a second elbow, a high-pressure straight pipe and a third elbow, wherein a first port of the manifold tee joint is connected with one end of the high-pressure main pipe, the other end of the high-pressure main pipe is connected with the third elbow, the third elbow is connected with the second elbow through the high-pressure straight pipe, a second port of the manifold tee joint is connected with the first elbow through the joint, and the third port of the manifold tee joint is an output end.
Furthermore, 2 discharge ports of the plunger pump are respectively connected with a high-pressure manifold through a flange tee joint and a flange straight-through.
Furthermore, the flange tee joint is connected with the first elbow, and the flange straight joint is connected with the second elbow.
Compared with the prior art, the invention has the beneficial effects that: the five-cylinder plunger pump with the pressure of more than 5000HP ensures a high-pressure and large-displacement power source of the fracturing equipment. The double-discharge form of the five-cylinder plunger pump realizes smooth liquid discharge of the five-cylinder plunger pump, avoids sand accumulation in the low-pressure manifold and simultaneously ensures large discharge of fracturing equipment. The low-pressure manifold adopts a 10-inch large-drift-diameter manifold, and double suction of a U-shaped pipe realizes sufficient liquid supply with large discharge capacity of the five-cylinder plunger pump.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of the manifold system.
Fig. 2 is a schematic diagram of a low pressure manifold.
Fig. 3 is a schematic view of the structure of the plunger pump.
Fig. 4 is a schematic diagram of a high pressure manifold.
FIG. 5 is a schematic diagram of the structure of the manifold tee.
The hydraulic system comprises a low-pressure manifold 1, a high-pressure manifold 2, a plunger pump 3, an exhaust port 4, a union 5, a butterfly valve 6, a U-shaped pipe 7, a connecting elbow 8, a buffer 9, a main pipeline 10, a connecting pipe 11, a male union 12, a male union 13, a connecting flange 14, a manifold tee 15, a joint 16, a first elbow 17, a high-pressure main pipe 18, a second elbow 19, a high-pressure straight pipe 20, a third elbow 21, a hydraulic end 22, a flange tee 23, a flange straight-through 24, a first port 25, a second port 26 and a third port.
Detailed Description
As shown in fig. 1 to 5, a manifold system for low-pressure suction and high-pressure discharge comprises a low-pressure manifold 1, a high-pressure manifold 2 and a plunger pump 3, wherein the low-pressure manifold 1 is used for inputting a medium into a hydraulic end 21 of the plunger pump 3, the hydraulic end 21 of the plunger pump 3 is provided with discharge ports 4, the number of the discharge ports 4 is 2, and 2 of the discharge ports 4 are connected to the high-pressure manifold 2. The double-discharge form of the five-cylinder plunger pump realizes smooth liquid discharge of the five-cylinder plunger pump, avoids sand accumulation inside the low-pressure manifold 1, and simultaneously ensures large discharge of fracturing equipment.
The plunger pump 3 is a five-cylinder plunger pump. The power of the plunger pump 3 is more than 5000 HP. The five-cylinder plunger pump with the pressure of more than 5000HP ensures a high-pressure and large-displacement power source of the fracturing equipment.
The pipe diameter of the low-pressure manifold 1 is more than 10 inches.
The low-pressure manifold 1 comprises an intake manifold, a main manifold and a connecting pipe 11, wherein the intake manifold is connected with one end of the main manifold, the connecting pipe 11 is arranged on the main manifold, and the other end of the connecting pipe 11 is connected with a hydraulic end 21 of the plunger pump 3.
The pipe diameters of the suction manifold and the main manifold are more than 10 inches. The low-pressure manifold 1 adopts a 10-inch large-drift-diameter manifold, and realizes sufficient liquid supply with large discharge capacity of the five-cylinder plunger pump.
The suction manifold comprises a union 5, a valve, a U-shaped pipe 7 and a connecting elbow 8, wherein one end of the U-shaped pipe 7 is connected with the union 5 and the valve, and the other end of the U-shaped pipe 7 is connected with a main manifold through the connecting elbow 8. The double suction of the U-shaped pipe 7 is enough for supplying liquid to protect driving and navigating for the large displacement of the five-cylinder plunger pump.
The valve is a butterfly valve 6 and is used for switching on and off liquid supply at the suction end of the low-pressure manifold 1.
The main manifold comprises a buffer 9 and a main line 10, the buffer 9 is arranged between the suction manifold and a connecting pipe 11, and the buffer 9 is connected with the main line 10.
A male union 12 is arranged on each connecting pipe 11, and the output end of each connecting pipe 11 is connected with a hydraulic end 21 of the plunger pump 3 through a connecting flange 13. The male union 12 is 1.1/2 inch.
The 2 discharge ports 4 of the plunger pump 3 are respectively arranged on both sides of the fluid end 21 in the horizontal direction, that is, are oppositely arranged on both sides of the fluid end 21. The discharge ports 4 horizontally distributed on the two sides of the hydraulic end 21 can well ensure the smooth discharge of the hydraulic end 21 of the five-cylinder plunger pump, and the smooth discharge is the premise for realizing large discharge.
The high-pressure manifold 2 comprises a manifold tee joint 14, a connector 15, a first elbow 16, a high-pressure main pipe 17, a second elbow 18, a high-pressure straight pipe 19 and a third elbow 20, wherein a first port 24 of the manifold tee joint 14 is connected with one end of the high-pressure main pipe 17, the other end of the high-pressure main pipe 17 is connected with the third elbow 20, the third elbow 20 is connected with the second elbow 18 through the high-pressure straight pipe 19, a second port 25 of the manifold tee joint 14 is connected with the first elbow 16 through the connector 15, a third port 26 of the manifold tee joint 14 is an output end, and the manifold tee joint 14 is suitable for a high-pressure manifold. The manifold tee 14 is a tee with a 45-degree corner. The opening of the branch tee 14 with an included angle of 45 degrees faces to the direction of the hydraulic end, namely the opening of the included angle faces to the discharge port on the other side of the plunger pump 3. Furthermore, the first port 24 and the second port 25 of the manifold tee 14 form an included angle of 45 degrees, an obtuse angle channel of 135 degrees is formed between the second port 25 and the third port 26, and a straight channel is formed between the first port 24 and the third port 26 connected with the other discharge port of the hydraulic end 21, so that smooth discharge of high-pressure media of 2 discharge ports is ensured. When the first plunger pump 3 discharges high pressure, the high pressure is discharged through a side discharge port, namely a first elbow 16, a joint 15, a second port 25 of the manifold tee 14 and a third port 26 of the manifold tee 14; and is discharged through a discharge port on the other side, namely a second elbow 18, a high-pressure straight pipe 19, a third elbow 20, a high-pressure main pipe 17, a first port 24 of the manifold tee 14 and a third port 26 of the manifold tee 14. The joint 15 is at an angle of 135 deg., the opening of the angle of the joint 15 facing away from the hydraulic end. The opening angle and the opening direction of the joint 15 ensure smooth and smooth discharge of the high-pressure medium to the manifold tee 14.
2 discharge ports 4 of the plunger pump 3 are respectively connected with the high-pressure manifold 2 through a flange tee joint 22 and a flange straight-through 23.
The flange tee 22 is connected with the first elbow 16, and the flange straight-through 23 is connected with the second elbow 18.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (14)

1. A manifold system for low pressure suction and high pressure discharge, comprising: the plunger pump comprises a low-pressure manifold, a high-pressure manifold and a plunger pump, wherein the low-pressure manifold is used for inputting media to a hydraulic end of the plunger pump, the hydraulic end of the plunger pump is provided with 2 discharge ports, and the 2 discharge ports are connected to the high-pressure manifold.
2. A low pressure suction high pressure discharge manifold system as set forth in claim 1, wherein: the plunger pump is a five-cylinder plunger pump.
3. A low pressure suction high pressure discharge manifold system as set forth in claim 1, wherein: the power of the plunger pump is more than 5000 HP.
4. A low pressure suction high pressure discharge manifold system as claimed in claim 2 or 3, wherein: the pipe diameter of the low-pressure manifold is more than 10 inches.
5. The low pressure suction high pressure discharge manifold system of claim 4, wherein: the low-pressure manifold comprises a suction manifold, a main manifold and a connecting pipe, wherein the suction manifold is connected with one end of the main manifold, the connecting pipe is arranged on the main manifold, and the other end of the connecting pipe is connected with the hydraulic end of the plunger pump.
6. The low pressure suction high pressure discharge manifold system of claim 5, wherein: the pipe diameters of the suction manifold and the main manifold are more than 10 inches.
7. The low pressure suction high pressure discharge manifold system of claim 4, wherein: the suction manifold comprises a union, a valve, a U-shaped pipe and a connecting elbow, wherein one end of the U-shaped pipe is connected with the union and the valve, and the other end of the U-shaped pipe is connected with a main manifold through the connecting elbow.
8. A low pressure suction high pressure discharge manifold system as set forth in claim 7, wherein: the valve is a butterfly valve.
9. The low pressure suction high pressure discharge manifold system of claim 4, wherein: the main manifold comprises a buffer and a main pipeline, the buffer is arranged between the suction manifold and the connecting pipe, and the buffer is connected with the main pipeline.
10. The low pressure suction high pressure discharge manifold system of claim 4, wherein: and a male union is arranged on each connecting pipe, and the output end of each connecting pipe is connected with the hydraulic end of the plunger pump through a connecting flange.
11. A low pressure suction high pressure discharge manifold system as set forth in claim 1, wherein: 2 discharge ports of the plunger pump are respectively arranged on two sides of the hydraulic end in the horizontal direction.
12. A low pressure suction high pressure discharge manifold system as set forth in claim 11, wherein: the high-pressure manifold comprises a manifold tee joint, a first elbow, a high-pressure main pipe, a second elbow, a high-pressure straight pipe and a third elbow, wherein a first port of the manifold tee joint is connected with one end of the high-pressure main pipe, the other end of the high-pressure main pipe is connected with the third elbow, the third elbow is connected with the second elbow through the high-pressure straight pipe, a second port of the manifold tee joint is connected with the first elbow through the joint, and a third port of the manifold tee joint is an output end.
13. A low pressure suction high pressure discharge manifold system as set forth in claim 12, wherein: 2 discharge ports of the plunger pump are respectively connected with a high-pressure manifold through a flange tee joint and a flange straight-through.
14. A low pressure suction high pressure discharge manifold system as set forth in claim 13, wherein: the flange tee joint is connected with the first elbow, and the flange straight joint is connected with the second elbow.
CN202010169884.9A 2020-03-12 2020-03-12 Low-pressure suction and high-pressure discharge manifold system Pending CN111219326A (en)

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