U.S. patent application number 14/397674 was filed with the patent office on 2015-03-19 for fracturing pump.
The applicant listed for this patent is SICHUAN HONGHUA PETROLEUM EQUIPMENT CO., LTD.. Invention is credited to Tao Chen, Ping Tang, Jiangyang Wang, Xinjun Wang, Meiying Xie, Bin Zhang, Mi Zhang, Yongcan Zhao.
Application Number | 20150078924 14/397674 |
Document ID | / |
Family ID | 49514168 |
Filed Date | 2015-03-19 |
United States Patent
Application |
20150078924 |
Kind Code |
A1 |
Zhang; Mi ; et al. |
March 19, 2015 |
Fracturing Pump
Abstract
The invention discloses a fracturing pump, comprising a cooling
device and a control device, wherein a motor is connected on an
shaft of the fracturing pump, the cooling device comprises an
air-cooled device for cooling a rotor of the motor and a
water-cooled device for cooling a stator of the motor, and the
control device is connected with the motor and the cooling device,
respectively. The fracturing pump in the invention adopts a
structure directly driven by the motor, thus breaking the form of a
transmission structure of a diesel engine of the conventional
fracturing pump added with a transmission tank, simplifying the
structure of the entire fracturing pump, reducing the apparatus
mounted on a fracturing car, decreasing failure rate of the
apparatus, and becoming more safe and reliable.
Inventors: |
Zhang; Mi; (Guanghan,
CN) ; Tang; Ping; (Guanghan, CN) ; Wang;
Xinjun; (Guanghan, CN) ; Wang; Jiangyang;
(Guanghan, CN) ; Chen; Tao; (Guanghan, CN)
; Zhang; Bin; (Guanghan, CN) ; Xie; Meiying;
(Guanghan, CN) ; Zhao; Yongcan; (Guanghan,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SICHUAN HONGHUA PETROLEUM EQUIPMENT CO., LTD. |
Guanghan, Sichuan |
|
CN |
|
|
Family ID: |
49514168 |
Appl. No.: |
14/397674 |
Filed: |
April 29, 2012 |
PCT Filed: |
April 29, 2012 |
PCT NO: |
PCT/CN2012/074945 |
371 Date: |
October 29, 2014 |
Current U.S.
Class: |
417/228 |
Current CPC
Class: |
F04B 1/00 20130101; F04B
53/08 20130101; F04B 47/02 20130101; F04C 29/045 20130101; E21B
43/00 20130101; E21B 43/26 20130101 |
Class at
Publication: |
417/228 |
International
Class: |
F04B 53/08 20060101
F04B053/08; E21B 43/00 20060101 E21B043/00; F04B 1/00 20060101
F04B001/00 |
Claims
1-10. (canceled)
11. A fracturing pump comprising a cooling device and a control
device, wherein: a pump motor is coupled on a shaft of said
fracturing pump, said cooling device comprises an air-cooled device
for cooling a rotor of said pump motor and a water-cooled device
for cooling a stator of said pump motor, and said control device is
coupled with said pump motor and said cooling device,
respectively.
12. A fracturing pump of claim 11, wherein said cooling device is
mounted between said two fracturing pumps.
13. A fracturing pump of claim 11, wherein said pump motor is
controlled by a middle-voltage numerical control frequency
converter.
14. A fracturing pump of claim 12, wherein said pump motor is
controlled by a middle-voltage numerical control frequency
converter.
15. A fracturing pump of claim 13, wherein a temperature sensor and
a pressure sensor are mounted on said fracturing pump; said
temperature sensor, said pressure sensor and said frequency
converter are connected to a PLC (Programmable Logic Controller)
via a field bus cable; and said PLC is connected with a man-machine
input device.
16. A fracturing pump of claim 14, wherein a temperature sensor and
a pressure sensor are mounted on said fracturing pump; said
temperature sensor, said pressure sensor and said frequency
converter are connected to a PLC (Programmable Logic Controller)
via a field bus cable; and said PLC is connected with a man-machine
input device.
17. A fracturing pump of claim 15, wherein said field bus is
Profibus.
18. A fracturing pump of claim 16, wherein said field bus is
Profibus
19. A fracturing pump of claim 17, wherein a monitoring device is
connected to a communication interface of said Profibus; said
monitoring device and said communication interface of said Profibus
are connected remotely via an Ethernet network; a distribution-type
I/O device is communicated with said PLC control layer for
information transmission to a measuring car PLC; and said car PLC
is communicated with a monitoring layer via said field bus.
20. A fracturing pump of claim 18, wherein a monitoring device is
connected to a communication interface of said Profibus; said
monitoring device and said communication interface of said Profibus
are connected remotely via an Ethernet network; a distribution-type
I/O device is communicated with said PLC control layer for
information transmission to a measuring car PLC; and said car PLC
is communicated with a monitoring layer via said field bus.
21. A fracturing pump of claim 19, wherein said man-machine input
device is an industrial touch screen.
22. A fracturing pump of claim 20, wherein said man-machine input
device is an industrial touch screen.
23. A fracturing pump of claim 11, wherein said air-cooled device
comprises an air blower; an air outlet of said air blower is
connected with an inner part of said pump motor; a radial fan is
also mounted on a casing of said pump motor; and said radial fan
draws air out of said inner part of said pump motor.
24. A fracturing pump of claim 12, wherein said air-cooled device
comprises an air blower; an air outlet of said air blower is
connected with an inner part of said pump motor; a radial fan is
also mounted on a casing of said pump motor; and said radial fan
draws air out of said inner part of said pump motor.
25. A fracturing pump of claim 11, wherein said water-cooled device
comprises a water pump; a water inlet of said water pump is
connected with a water tank; a water outlet thereof is connected
with a motor water jacket; said water jacket is provided with an
S-shaped passage; said water outlet is connected with a heat sink;
and said water outlet is connected with said water tank.
26. A fracturing pump of claim 12, wherein said water-cooled device
comprises a water pump; a water inlet of said water pump is
connected with a water tank; a water outlet thereof is connected
with a motor water jacket; said water jacket is provided with an
S-shaped passage; said water outlet is connected with a heat sink;
and said water outlet is connected with said water tank.
27. A fracturing pump of claim 25, wherein a drainage port is also
provided for said water jacket.
28. A fracturing pump of claim 26, wherein a drainage port is also
provided for said water jacket.
Description
FIELD OF THE INVENTION
[0001] The invention relates to an oil-field fracturing apparatus,
particularly to a fracturing pump.
BACKGROUND OF THE INVENTION
[0002] In order to improve the recovery of the oil and gas
resources for the best economic benefits, a recovery process of oil
and gas reservoir (i.e., fracturing) is widely used for output
boosting for different geological structures and reservoir
characteristics, of which a fracturing set is a key apparatus which
includes a core apparatus--a fracturing pump car. currently, widely
used fracturing pump cars are provided with 2000 hp.about.2500 hp
fracturing pump. The fracturing pump cars have the same
transmission structure, i.e., driven by a diesel engine on the car
with a gearbox and a cardan shaft. The pump working displacement
and the pressure is controlled by speed of the diesel engine with
the gearbox. Due to restriction of mechanical structure, the
capacity of car and roads and bridges, the single-machine power of
the fracturing pump is hard to boost. For large-scale hydraulic
fracturing operations, more fracturing pump cars are needed to meet
the displacement requirements, this causes more and more occupied
field area, more complicated pump manifold layout, long
preparation, high cost, hard to control, low control accuracy, poor
response, and high security risk.
[0003] A commonly used fracturing set comprises an engine, a
hydraulic transmission box, a transmission device, a horizontal
five-cylinder fracturing pump, an intake manifold, an exhaust
manifold, a security system, a fuel system, and a power lubrication
system etc. A car engine start-up oil pump is started by the power
from the chassis, the oil pump drives a starting motor of the car
engine to start the engine to drive the fracturing pump via the
hydraulic transmission box and a transmission shaft. However, the
transmission solution has the following defects: first of all, the
fracturing set has a complicated structure and larger occupied
space; secondly, there are many devices needed to be maintained
regularly to cause high cost; furthermore, there is low accuracy
for the fracturing pump speed and torque control due to the
hydraulic transmission box.
SUMMARY OF THE INVENTION
[0004] The object of the invention is to overcome the
above-mentioned defects in the prior art and provides a fracturing
pump with large single-machine power, high working displacement,
small occupied area, and high accuracy of speed and the torque
control.
[0005] In order to achieve the above-mentioned goals, the invention
provides technical solutions as below:
[0006] a fracturing pump comprises a cooling device and a control
device, a motor is coupled on a shaft of the fracturing pump, the
cooling device comprises an air-cooled device for cooling a rotor
of the pump motor and a water-cooled device for cooling a stator of
the pump motor, and the control device is connected with the pump
motor and the cooling device, respectively.
[0007] Preferably, the cooling device is mounted between the two
fracturing pumps.
[0008] Preferably, a control system of the pump motor is controlled
by a middle-voltage numerical control frequency converter.
[0009] Preferably, a temperature sensor and a pressure sensor are
mounted on the fracturing pump, the temperature sensor, the
pressure sensor and the frequency converter of the pump motor are
connected with a PLC via a field bus cable, and the PLC is
connected with a man-machine input device.
[0010] Preferably, the field bus is a Profibus.
[0011] Preferably, a monitoring device is connected to a
communication interface of the Profibus, the monitoring device and
the communication interface of the Profibus are connected remotely
via an Ethernet network, a distribution-type I/O device is
communicated with the PLC control layer for information
transmission to a measuring car PLC, the car PLC is communicated
with a monitoring layer via the field bus.
[0012] Preferably, the man-machine input device is an industrial
touch screen.
[0013] Preferably, the air-cooled device comprises an air blower
which its outlet is connected with the inner part of the pump
motor, on which its case is also mounted with one radial fan, which
draws air out of the inner part of the pump motor.
[0014] Preferably, the water-cooled device comprises a water pump
which its water inlet is connected with a water tank and water
outlet connected with a pump motor water jacket which its inner
part is provided with an S-shaped passage and its water outlet
connected with a heat sink which its water outlet is connected with
the water tank.
[0015] Preferably, a drainage port is also provided for the water
jacket.
[0016] Compared with the prior art, the invention has the following
effects:
[0017] 1. The fracturing pump of the invention adopts a structure
directly driven by a motor, thus breaking the form of a
transmission structure of a diesel engine of the conventional
fracturing pump added with a transmission tank, simplifying the
structure of the entire fracturing pump, reducing the apparatus
mounted on a fracturing car, decreasing failure rate of the
apparatus, and becoming more safe and reliable.
[0018] 2. The fracturing pump of the invention has more power and
working displacement to make one pump/car or two pumps/car
available, to simplify the fracturing pump manifold layout, to
reduce occupied area and to reduce connection pipelines between the
fracturing pumps, greatly to boost large-scale operations, to meet
requirements of modern green and environmental protection.
[0019] 3. The cooling device of the fracturing pump comprises the
air-cooled device and the water-cooled device. The air-cooled
device takes part of the heat generated by the pump motor during
operation while the water-cooled device takes the rest by water
recycling through the pump motor water jacket. For some preferred
embodiments, the cooled air enters into the air blower via an air
inlet of the air-cooled device and compressed by a centrifuge and
the compressed cooling air enters into the inner part of the pump
motor to take away the heat generated by the pump motor core. The
fan near the air outlet rotates to provide centrifugal force to
make a lower pressure area on one side of the fan to fast flow of
the air in the inner part of the pump motor to draw more air out of
the pump motor to fast the pump motor heat dissipation. The cooled
water from the water tank of the water-cooled device is pressurized
by a water pump and enters into the motor water jacket via the
water inlet and passes through the S-shaped passage (which
elongates heat dissipation route for better heat dissipation) of
the motor water jacket and takes away the heat of an inner surface
of the motor water jacket. The cooled water passes through an
S-shaped water passage and flows out of the water outlet to be
cooled by the heat sink with its temperature substantially equals
to that of the water jacket inlet and the water flows back to the
water tank. If the pump motor does not work in a certain period in
cold environment such as temperature lower than Zero degrees
Celsius, the water in the motor water jacket must be discharged
through the drainage port to avoid the water icing to break the
motor water jacket.
DESCRIPTION OF THE DRAWINGS
[0020] FIG. 1 illustrates a fracturing pump control system.
[0021] FIG. 2 illustrates an air-cooled device of the fracturing
pump.
[0022] FIG. 3 illustrates a water-cooled device of the fracturing
pump.
[0023] FIG. 4 illustrates a side view of the water-cooled
device.
[0024] FIG. 5 illustrates a water flow in the inner part of a motor
water jacket in the water-cooled device of the fracturing pump.
DETAILED DESCRIPTION OF THE INVENTION
[0025] The aforementioned and other aspects, solutions, and
advantages of the present invention will become apparent from the
following descriptions and corresponding drawings. The embodiments
further clarify the present invention and shall not be construed to
limit the scope of the present invention.
Embodiment 1
[0026] A fracturing pump and its support apparatus comprise three
fracturing cars, a sand mixing car, a measuring car and their
control systems. The fracturing pump comprises a cooling device and
a control device. A motor is coupled on a shaft of the fracturing
pump. The cooling device comprises an air-cooled device for cooling
a rotor of the pump motor and a water-cooled device for cooling a
stator of the pump motor. The control device is connected with the
pump motor and the cooling device. A token ring is made with a
shielded twisted pair by a Profibus for connection for the
fracturing pump, the sand mixing car and the measuring car etc to
make a network stable and easy scalable. Each of the apparatus is
connected to the network with a Network Access device with
bandwidth of 1.5 Mb/s.
[0027] The signal of a sensor of the fracturing pump is
transmitteed to a S7-300PLC of the measuring car via a
distribution-type I/O apparatus. The S7-300PLC is connected with
the Profibus monitoring layer. The monitoring layer is communicated
with the S7-300PLC by a communication interface of the Profibus.
Fracturing process parameters are set and monitored in a graphical
way. The historical output data is stored by the network. After
analyzing onsite real-time data and simulating fracture expansion
and proppant migration with afracture simulation software, a
solution is made for optimizing fracturing design to improve the
fracturing quality and operation efficiency.
[0028] The monitoring layer comprises an industrial control
computer with a communication interface of the Profibus to
communicate with the S7-300PLC. The monitoring layer is
communicated with the PLC of the control layer via the
communication interface of the Profibus. The monitoring layer is
communicated with the PLC of the control layer through the
communication interface of the Profibus. A software platform of
system operation adopts configuration software of Windows NT+WINCC,
disposes and monitors a parameter of a process with a graphical
way, stores the historical data of production, carries out field
analysis for real-time data, simulates the expansion of complicate
oil and gas reservoir gap and the migration of a propping agent by
means of a fracturing simulation software, and optimizes the design
of fracturing construction, thereby improving the quality of the
fracturing construction and operation efficiency.
[0029] Remote control and information processing can be realized by
remote transmission effectively to cut apparatus maintenance time
and cost and save time and space to get the information.
[0030] The sensors comprise a pressure sensor and a temperature
sensor.
Example 2
[0031] Being the same with example 1, preferably, two fracturing
pumps are provided on a fracturing car. A cooling device is mounted
between the two fracturing pumps.
Example 3
[0032] Being the same with Example 2, preferably, a cooling device
on a fracturing pump comprises an air-cooled device for the pump
motor and a water-cooled device for the pump motor.
[0033] As shown in FIG. 2, the air-cooled device for the pump motor
comprises a fan motor 3 and a pump motor core 4. One end of the fan
motor 3 is provided with a fan 2 on which an air inlet 1 is
provided. The pump motor core 4 is also provided thereon with a fan
5 on which an air outlet 6 is provided. The working principle of
the air-cooled device for the pump motor is as follows: cooled air
enters into the fan 2 via the air inlet 1 to make the cooled air
compresssed by the centrifugal force of the fan 2, and the
compressed air enters into the inner part of the pump motor, and
takes away the heat generated by the pump motor core 4. The
centrifugal force generated by the rotation of the fan 5 makes a
lower pressure area near the fan 5 to fast the flow of the air in
the pump motor, and discharges the heat out of the pump motor
through the air outlet 6 for heat dissipation.
[0034] As shown in FIGS. 3, 4, the water-cooled device of the motor
comprises the pump motor water jacket 7 and a water pump 12. The
pump motor water jacket 7 is also provided thereon with a water
inlet 8 and a water outlet 9. A heat sink 10, is connected with a
water tank 11, which are also provided outside of the pump motor.
The water tank 11 is connected with the water inlet 8. A drainage
port 13 is also provided on the pump motor water jacket. The
working principle of the water-cooled device of the motor is as
follows: the cooled water in the water tank 11 is pressurized by
the water pump 12 and enters into the pump motor water jacket 7 via
the water inlet 8; as shown in FIG. 5, the cooled water passes
through an S-shaped passage (which elongates the heat dissipation
route for better heat dissipation) of the pump motor water jacket
7, and takes away the heat of an inner surface of the pump motor
water jacket; The cooled water passes through an S-shaped water
passage, flows out via the water outlet 9, and the water is cooled
by the heat sink 10 with its temperature substantially equals to
that of the water jacket inlet and the water flows back to the
water tank 11. If the pump motor does not work in a certain period
in cold environment such as temperature lower than Zero degrees
Celsius, the water in the motor water jacket 7 must be discharged
through the drainage port 13 to avoid the water icing to break the
motor water jacket 7.
* * * * *