CN113926370A - Distributed liquid supply sand mixing sledge - Google Patents
Distributed liquid supply sand mixing sledge Download PDFInfo
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- CN113926370A CN113926370A CN202110866036.8A CN202110866036A CN113926370A CN 113926370 A CN113926370 A CN 113926370A CN 202110866036 A CN202110866036 A CN 202110866036A CN 113926370 A CN113926370 A CN 113926370A
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- Prior art keywords
- manifold
- electric
- liquid supply
- sand
- sand mixing
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- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
The invention discloses a distributed liquid supply sand mixing sledge, which comprises a water tank (1), a manifold (2), an electric liquid supply device (3), a connecting manifold A (4), a connecting manifold B (5), a sand tank (6), an electric sand mixing sledge (7) and a connecting manifold C (8); the water tank (1) is connected with the electric liquid supply device (3) through a manifold (2); the electric liquid supply device (3) is connected with the fracturing pump through a connecting manifold A (4), and the electric sand mixing sledge (7) is connected with the electric liquid supply device (3) through a connecting manifold B (5); the electric sand mixing sledge (7) is connected with the sand tank (6) through a sand hopper, and the electric sand mixing sledge (7) is connected with the fracturing pump through a connecting manifold C (8). The invention improves the liquid supply pressure and flow rate by adopting a distributed liquid supply structure and arranging the liquid supply device close to the water tank, thereby solving the problems of insufficient liquid supply during long-distance large-displacement construction operation of the sand mulling skid and improving the dynamic regulation speed of the liquid level control system.
Description
Technical Field
The invention relates to the field of sand mixing sleds, in particular to a distributed liquid supply sand mixing sled.
Background
The sand mixing truck (skid) is an important component device in shale gas fracturing construction, and has the functions of sucking externally provided liquid into a mixing tank in a self-absorption mode, mixing the liquid with a propping agent and various additives in proportion according to construction requirements, and outputting the mixture to a fracturing truck connected with the sand mixing truck at a certain pressure. Along with the development of the fracturing technology, the requirement of the development of unconventional oil and gas resources on the discharge capacity of a fracturing blender truck is gradually improved, and the suction and discharge performance of the fracturing blender truck (skid) becomes a key index of the working capacity of the fracturing blender truck.
The sand mixing truck requires that the suction pump can realize automatic control in the working process so as to keep the flow of liquid supplied to the mixing tank constant, and meanwhile, the maximum flow of the suction pump is larger than that of the discharge pump so as to make up for the loss of a pipeline and the sudden change of the discharge flow. The existing sand mixing truck utilizes a centrifugal pump self-absorption principle, because the front end of the centrifugal pump is low in pressure and low in liquid flow rate, and due to the fact that pipeline friction resistance exists, when large-discharge construction is met or a water tank is far away from the sand mixing truck, the situation of insufficient water supply often occurs, automatic liquid level control failure is caused, the serious situation causes 'air suction' of a rear-end fracturing pump, and finally fracturing construction operation is interrupted.
In order to meet the requirement of large-flow construction of a suction system, the number of suction manifolds is generally increased by the conventional measures so as to improve the liquid flow capacity, but the conventional measures have the following defects:
1. when the distance between the water tank and the sand mixing truck is long, the liquid supply capacity is poor;
2. the pipeline connection is more, and the workload is large;
3. the liquid flow rate is low, the flow regulation speed is low, and the liquid level control fluctuates up and down.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a distributed liquid supply sand mixing skid.
The purpose of the invention is realized by the following technical scheme:
a distributed liquid supply sand mixing sledge comprises a water tank, a manifold, an electric liquid supply device, a connecting manifold A, a connecting manifold B, a sand tank, an electric sand mixing sledge and a connecting manifold C;
the water tank is connected with one end of the electric liquid supply device through a manifold; the other end of the electric liquid supply device is respectively connected with the fracturing pump through a connecting manifold A and is connected with the electric sand mixing sledge through a connecting manifold B;
one end of the electric sand mixing sledge is connected with the sand tank through a sand hopper, and the other end of the electric sand mixing sledge is connected with the fracturing pump through a connecting manifold C.
The electric liquid supply device comprises an electric cabinet, a variable frequency motor, a centrifugal pump, a suction valve, a suction manifold A, a discharge manifold A, a pressure sensor and a flowmeter;
the electric cabinet drives and controls the variable frequency motor to operate;
the electric cabinet, the variable frequency motor and the centrifugal pump are sequentially connected;
the suction manifold A and the discharge manifold A are respectively connected into a centrifugal pump;
a plurality of suction valves are arranged on the suction manifold A;
and the discharge manifold A is provided with a pressure sensor and a flowmeter, and the electric cabinet is respectively connected with the pressure sensor and the flowmeter.
The electric sand mixing sledge comprises an autonomous control system, a feeding mechanism, a stirring mechanism and a discharging mechanism;
the autonomous control system is respectively connected with the feeding mechanism, the stirring mechanism and the discharging mechanism;
the feeding mechanism and the discharging mechanism are respectively connected with the stirring mechanism.
The stirring mechanism comprises an electric regulating valve, a stirring tank, a stirring motor and a dry adding auger;
the electric control valve is arranged at the bottom of the stirring tank, and the stirring motor and the dry addition auger are respectively arranged at the top end of the stirring tank.
The feeding mechanism comprises a plurality of suction interfaces, a suction manifold B and a liquid adding pump;
the suction manifold B is connected with the stirring tank;
the plurality of suction ports and the liquid adding pump are respectively installed on the suction manifold B.
The feeding mechanism further comprises a sand hopper, an auger, a reduction box and an auger motor;
the sand hopper is arranged at the bottom end of the auger;
the packing auger is obliquely arranged, and an outlet at the upper end of the packing auger is connected with the stirring tank;
the reduction box and the auger motor are sequentially arranged at the top end of the auger from bottom to top and are connected with the auger.
The discharge mechanism comprises a discharge pump, a discharge motor and a discharge manifold B;
the discharge manifold B is connected with the stirring tank;
the discharge pump and the discharge motor are respectively connected with a discharge manifold B.
The automatic control system is arranged in a control compartment of the sand mixing truck, and the autonomous control system is respectively connected with the electric regulating valve, the auger motor, the stirring motor and the discharge motor through connecting cables.
The invention has the beneficial effects that:
1. the invention reduces the distance between the suction pump and the water tank through the distributed design, and solves the problems that the self-priming sand mixing truck has poor water supply and water supply capacity for long distance and is easy to cause construction interruption;
2. the flow rate of the liquid supply is improved, the liquid level adjusting time is shortened, and the phenomena of ' suction of air ' and ' overflow of the stirring tank are not easy to occur;
3. the liquid supply device adopts a 'double-pump' design, can simultaneously supply liquid to the sand mulling and the fracturing pump, and can save one liquid supply device for users;
4. distributed modular structure, under the condition that the water pitcher is far away from the mulling or well site area is limited, the mulling can be arranged remotely, and the site flexible arrangement is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of the apparatus of the present invention;
FIG. 2 is a front view of the electric liquid supply apparatus of the present invention;
FIG. 3 is a front view of the electric sand mixing skid of the present invention.
In the drawings: 1-a water tank, 2-a manifold, 3-an electric liquid supply device, 4-a connecting manifold A, 5-a connecting manifold B, 6-a sand tank, 7-an electric sand mixing sledge, 8-a connecting manifold C, 9-an electric cabinet, 10-a variable frequency motor, 11-a centrifugal pump, 12-a suction valve, 13-a suction manifold A, 14-a discharge manifold A, 15-a pressure sensor, 16-a flowmeter, 17-a suction interface, 18-a suction manifold B, 19-a discharge pump, 20-an electric control valve, 21-a stirring tank, 22-a sand hopper, 23-a packing auger, 24-a reduction box, 25-a packing auger motor, 26-a stirring motor, 27-a dry adding auger, 28-a discharge motor, 29-a discharge manifold B, 30-liquid addition pump.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The sand mixing truck requires that the suction pump can realize automatic control in the working process so as to keep the flow of liquid supplied to the mixing tank constant, and meanwhile, the maximum flow of the suction pump is larger than that of the discharge pump so as to make up for the loss of a pipeline and the sudden change of the discharge flow.
The existing sand mixing truck utilizes a centrifugal pump self-absorption principle, because the front end of the centrifugal pump is low in pressure and low in liquid flow rate, and due to the fact that pipeline friction resistance exists, when large-discharge construction is met or a water tank is far away from the sand mixing truck, the situation of insufficient water supply often occurs, automatic liquid level control failure is caused, the serious situation causes 'air suction' of a rear-end fracturing pump, and finally fracturing construction operation is interrupted.
In this embodiment, as shown in fig. 1, a distributed liquid supply sand mixing skid includes a water tank 1, a manifold 2, an electric liquid supply device 3, a connecting manifold a4, a connecting manifold B5, a sand tank 6, an electric sand mixing skid 7, and a connecting manifold C8;
the water tank 1 is connected with one end of an electric liquid supply device 3 through a manifold 2; the other end of the electric liquid supply device 3 is respectively connected with the fracturing pump through a connecting manifold A4 and is connected with the electric sand mixing skid 7 through a connecting manifold B5;
one end of the electric sand mixing sledge 7 is connected with the sand tank 6 through a sand hopper, and the other end of the electric sand mixing sledge 7 is connected with the fracturing pump through a connecting manifold C8.
The electric sand mixing sledge 7 mixes the propping agent and the clear water according to the construction process proportion and then provides fracturing fluid for the fracturing pump through a connecting manifold C8.
The electric liquid supply device 3 comprises an electric cabinet 9, a variable frequency motor 10, a centrifugal pump 11, a suction valve 12, a suction manifold A13, a discharge manifold A14, a pressure sensor 15 and a flowmeter 16;
the electric cabinet 9 drives and controls the variable frequency motor 10 to operate; the electric cabinet 9, the variable frequency motor 10 and the centrifugal pump 11 are sequentially connected in sequence;
the suction manifold A13 and the discharge manifold A14 are respectively connected to the centrifugal pump 11; a plurality of suction valves 12 are arranged on the suction manifold A13;
the discharge manifold A14 is provided with a pressure sensor 15 and a flow meter 16, and the electric control box 9 is respectively connected with the pressure sensor 15 and the flow meter 16.
The fracturing fluid is connected with a centrifugal pump 11 through a suction manifold A13 through a suction valve 12, is pressurized and then is supplied to a sand mixing truck through a discharge manifold A14.
A pressure transducer 15 and a flow meter 16 are mounted to the discharge manifold a14 for measuring the supply pressure and the supply displacement, respectively.
The electric sand mixing sledge 7 comprises an autonomous control system, a feeding mechanism, a stirring mechanism and a discharging mechanism;
the autonomous control system is respectively connected with the feeding mechanism, the stirring mechanism and the discharging mechanism;
the feeding mechanism and the discharging mechanism are respectively connected with the stirring mechanism.
The stirring mechanism comprises an electric regulating valve 20, a stirring tank 21, a stirring motor 26 and a dry adding auger 27; the electric control valve 20 is arranged at the bottom of the stirring tank 21, and the stirring motor 26 and the dry adding auger 27 are respectively arranged at the top end of the stirring tank 21.
The feeding mechanism comprises a plurality of suction ports 17, a suction manifold B18 and a liquid adding pump 30; the suction manifold B18 is connected with the stirring tank 21;
the plurality of suction ports 17 and the liquid feed pump 30 are mounted on the suction manifold B18, respectively.
The feeding mechanism further comprises a sand hopper 22, an auger 23, a reduction box 24 and an auger motor 25;
the sand hopper 22 is arranged at the bottom end of the auger 23; the packing auger 23 is obliquely arranged, and an outlet at the upper end of the packing auger 23 is connected with the stirring tank 21;
the reduction box 24 and the auger motor 25 are sequentially arranged at the top end of the auger 23 from bottom to top and are connected with the auger 23.
The discharge mechanism includes a discharge pump 19, a discharge motor 28, and a discharge manifold B29; the discharge manifold B29 is connected with the stirring tank 21; the discharge pump 19 and the discharge motor 28 are connected to a discharge manifold B29, respectively.
The automatic control system is arranged in a control compartment of the sand mixing truck, and the autonomous control system is respectively connected with the electric regulating valve 20, the auger motor 25, the stirring motor 26 and the discharge motor 28 through connecting cables.
The suction port 17 is connected to a liquid supply device and is connected to the stirring tank 21 through a suction manifold B18 and the electric control valve 20.
The auger motor 25 drives the auger 23 through the reduction gearbox 24 to convey the proppant in the sand hopper 22 to the stirring tank 21.
The agitator motor 26 drives the agitator to mix the clean water and proppant in proportion.
The discharge motor 28 drives the discharge pump 19 to supply the sand-carrying fluid in the agitator tank 21 to the fracturing pump through the discharge manifold B29.
The dry adding motor drives the dry adding auger 27 to add dry powder medicament into the stirring tank according to the proportion, and the liquid adding motor drives the liquid adding pump 30 to add liquid chemical medicament into the stirring tank 21 according to the proportion.
The automatic control system can realize automatic control of liquid supply, proppant and chemical agents.
The embodiment reduces the distance between the suction pump and the water tank through a distributed design, and solves the problems that the self-priming sand mixing truck has poor water supply capability for long-distance liquid supply and is easy to cause construction interruption; the flow rate of the liquid supply is improved, the liquid level adjusting time is shortened, and the phenomena of ' suction of air ' and ' overflow of the stirring tank are not easy to occur; the liquid supply device adopts a 'double-pump' design, can simultaneously supply liquid to the sand mulling and the fracturing pump, and can save one liquid supply device for users; distributed modular structure, under the condition that the water pitcher is far away from the mulling or well site area is limited, the mulling can be arranged remotely, and the site flexible arrangement is convenient.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. 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 (6)
1. A distributed liquid supply sand mixing sledge is characterized by comprising a water tank (1), a manifold (2), an electric liquid supply device (3), a connecting manifold A (4), a connecting manifold B (5), a sand tank (6), an electric sand mixing sledge (7) and a connecting manifold C (8); the water tank (1) is connected with one end of the electric liquid supply device (3) through a manifold (2); the other end of the electric liquid supply device (3) is respectively connected with the fracturing pump through a connecting manifold A (4) and is connected with an electric sand mixing skid (7) through a connecting manifold B (5); one end of the electric sand mixing sledge (7) is connected with the sand tank (6) through a sand hopper, and the other end of the electric sand mixing sledge (7) is connected with the fracturing pump through a connecting manifold C (8).
2. The distributed liquid supply sand mixing skid according to claim 1, wherein the electric liquid supply device (3) comprises an electric cabinet (9), a variable frequency motor (10), a centrifugal pump (11), a suction valve (12), a suction manifold A (13), a discharge manifold A (14), a pressure sensor (15) and a flow meter (16); the electric cabinet (9) drives and controls the variable frequency motor (10) to operate; the electric cabinet (9), the variable frequency motor (10) and the centrifugal pump (11) are sequentially connected; the suction manifold A (13) and the discharge manifold A (14) are respectively connected into the centrifugal pump (11); a plurality of suction valves (12) are arranged on the suction manifold A (13); a pressure sensor (15) and a flowmeter (16) are installed on the discharge manifold A (14), and the electric cabinet (9) is respectively connected with the pressure sensor (15) and the flowmeter (16).
3. The distributed liquid supply sand mixing skid according to claim 1, wherein the electric sand mixing skid (7) comprises an autonomous control system, a feeding mechanism, a stirring mechanism and a discharging mechanism; the autonomous control system is respectively connected with the feeding mechanism, the stirring mechanism and the discharging mechanism; the feeding mechanism and the discharging mechanism are respectively connected with the stirring mechanism.
4. The distributed liquid supply sand mixing skid according to claim 3, wherein the stirring mechanism comprises an electric regulating valve (20), a stirring tank (21), a stirring motor (26) and a dry adding auger (27); the electric regulating valve (20) is arranged at the bottom of the stirring tank (21), and the stirring motor (26) and the dry adding auger (27) are respectively arranged at the top end of the stirring tank (21).
5. The distributed feed sand mixing skid according to claim 3, wherein the feed mechanism comprises a plurality of suction ports (17), a suction manifold B (18), and a liquid addition pump (30); the suction manifold B (18) is connected with the stirring tank (21); the plurality of suction ports (17) and the liquid addition pump (30) are respectively mounted on a suction manifold B (18).
6. The distributed liquid supply sand mixing skid according to claim 3, wherein the feeding mechanism further comprises a sand hopper (22), an auger (23), a reduction box (24) and an auger motor (25); the sand hopper (22) is arranged at the bottom end of the packing auger (23); the packing auger (23) is obliquely arranged, and an outlet at the upper end of the packing auger (23) is connected with the stirring tank (21); the reduction box (24) and the packing auger motor (25) are sequentially arranged at the top end of the packing auger (23) from bottom to top and are connected with the packing auger (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866036.8A CN113926370A (en) | 2021-07-29 | 2021-07-29 | Distributed liquid supply sand mixing sledge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866036.8A CN113926370A (en) | 2021-07-29 | 2021-07-29 | Distributed liquid supply sand mixing sledge |
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| CN113926370A true CN113926370A (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110866036.8A Pending CN113926370A (en) | 2021-07-29 | 2021-07-29 | Distributed liquid supply sand mixing sledge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377605A (en) * | 2022-01-19 | 2022-04-22 | 中石化四机石油机械有限公司 | Full-electric sand mulling system with integrated liquid supply function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3265218A2 (en) * | 2015-03-04 | 2018-01-10 | Stewart & Stevenson, LLC | Well fracturing systems with electrical motors and methods of use |
| CN207999239U (en) * | 2018-03-05 | 2018-10-23 | 兰州兰石集团有限公司 | Variable-frequency motor directly drives mixing system |
| CN110500077A (en) * | 2019-08-23 | 2019-11-26 | 大庆石油管理局有限公司 | A kind of branch liquid supply equipment |
| CN112050080A (en) * | 2020-09-14 | 2020-12-08 | 北京航天试验技术研究所 | Distributed control system, control method and measurement and control system for liquid hydrogen refueling station |
| CN112127865A (en) * | 2020-08-18 | 2020-12-25 | 四川宏华石油设备有限公司 | Electrically driven fracturing sand mixing skid |
| CN112412427A (en) * | 2020-12-02 | 2021-02-26 | 大庆石油管理局有限公司 | Remote linkage liquid supply and distribution system |
-
2021
- 2021-07-29 CN CN202110866036.8A patent/CN113926370A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3265218A2 (en) * | 2015-03-04 | 2018-01-10 | Stewart & Stevenson, LLC | Well fracturing systems with electrical motors and methods of use |
| CN207999239U (en) * | 2018-03-05 | 2018-10-23 | 兰州兰石集团有限公司 | Variable-frequency motor directly drives mixing system |
| CN110500077A (en) * | 2019-08-23 | 2019-11-26 | 大庆石油管理局有限公司 | A kind of branch liquid supply equipment |
| CN112127865A (en) * | 2020-08-18 | 2020-12-25 | 四川宏华石油设备有限公司 | Electrically driven fracturing sand mixing skid |
| CN112050080A (en) * | 2020-09-14 | 2020-12-08 | 北京航天试验技术研究所 | Distributed control system, control method and measurement and control system for liquid hydrogen refueling station |
| CN112412427A (en) * | 2020-12-02 | 2021-02-26 | 大庆石油管理局有限公司 | Remote linkage liquid supply and distribution system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377605A (en) * | 2022-01-19 | 2022-04-22 | 中石化四机石油机械有限公司 | Full-electric sand mulling system with integrated liquid supply function |
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