Split type liquid supply sand mixing sledge system

Abstract

The utility model relates to a split type liquid supply sand mulling skid system. According to the technical scheme, a liquid supply pump is installed on a liquid supply sledge, a sand mixing sledge is located beside the liquid supply sledge, a double-sledge structure of the sand mixing sledge and the liquid supply sledge is formed, and the sand mixing sledge and the liquid supply sledge are connected to an instrument sledge through a control cable; the lower ends of the water tanks are connected to a liquid supply skid, and the outlet end of a first liquid supply pump is fed into a first fracturing pump truck through a pipeline; the outlet end of the second liquid supply pump is connected to a mixing and stirring tank of the sand mixing skid, and a liquid outlet is connected to the connecting manifold and the second fracturing pump truck through a liquid drainage pipeline; and the outer side of the mixing and stirring tank is connected with a liquid adding pump through a pipeline. The utility model has the beneficial effects that the liquid supply pump is stripped from the sand mixing sledge to the independent liquid supply sledge, so that the dead weight of the sand mixing sledge is reduced, and the troubleshooting time is shortened; in addition, due to the fact that the liquid supply sledge is additionally arranged, the length of the first pipeline and the length of the second pipeline are shortened, the cavitation probability of the pipelines is reduced, and the incidence rate of suction badness is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field fracturing equipment technical field, especially relates to a split type liquid supply sand mixing skid system. BACKGROUND

[0002] Sand mixing skid is the main matching equipment of oilfield stimulation operation, and is one of core equipment in oilfield fracturing complete equipment, and is mainly used for mixing and supplying three kinds of materials, namely liquid (can be water, base fluid etc.), proppant (quartz sand or ceramic) and additive (solid or liquid) into well according to the designed proportion.

[0003] The existing traditional sand mixing skid equipment has high integration degree, generally integrates the liquid supply pump in the skid body, adopts long distance suction pipeline design, and has the following problems: first, the overall weight exceeds 15 tons, needs special vehicle during transportation, and the passing ability in complex terrain is poor; second, the length of suction pipeline is generally more than 8 meters, leads to insufficient NPSH (net positive suction head), and the probability of cavitation is increased by 35%; third, the liquid supply pump needs to be disassembled from the sand mixing skid and three cross suction pipelines during maintenance, and the average time consumption is 4 hours. UTILITY MODEL CONTENT

[0004] The utility model aims at the above-mentioned defects existing in the prior art, and provides a split type liquid supply sand mixing skid system, which separates the liquid supply pump from the sand mixing skid to a separately installed liquid supply skid, and solves the problems of excessive volume and weight, low suction efficiency and difficult maintenance through equipment modularization reconstruction.

[0005] The present invention discloses a split-type liquid supply and sand mixing skid system, the technical solution of which is as follows: including a water tank (1), a liquid supply skid (2), a control cable (3), an instrument skid (4), a sand mixing skid (5), and a connecting manifold (6). The liquid supply pump (2.1) is installed on the liquid supply skid (2), and the sand mixing skid (5) is located on one side of the liquid supply skid (2), forming a double skid structure of the sand mixing skid (5) and the liquid supply skid (2). The sand mixing skid (5) and the liquid supply skid (2) are connected to the instrument skid (4) through the control cable (3). The lower ends of multiple water tanks (1) are respectively connected to the inlet end of the first liquid supply pump (2.1) on the liquid supply skid (2) through the first pipeline (9). The outlet of .1) is fed into the first fracturing pump truck (7) through a pipeline; the lower ends of multiple water tanks (1) are respectively connected to the inlet end of the second liquid supply pump (2.2) on the liquid supply skid (2) through pipelines, the outlet end of the second liquid supply pump (2.2) is connected to the inlet pipeline (5.12) of the mixing tank (5.1) of the sand mixing skid (5) through the second pipeline (10), the outlet of the mixing tank (5.1) is connected to the connecting manifold (6) through the drain pipeline (5.13), and the outlet end of the connecting manifold (6) is connected to the second fracturing pump truck (8) through a pipeline; the liquid addition pump (5.6) is connected to the outside of the mixing tank (5.1) through a pipeline.

[0006] Preferably, the above-mentioned sand mixing skid (5) includes a mixing tank (5.1), a screw conveyor (5.2), a sand hopper (5.3), a discharge pump (5.4), and a sand mixing skid body (5.5). The mixing tank (5.1), screw conveyor (5.2), sand hopper (5.3), and discharge pump (5.4) are installed on the sand mixing skid body (5.5). An agitator (5.11) is installed in the inner cavity of the mixing tank (5.1). A screw conveyor (5.2) is provided on one side of the mixing tank (5.1). The lower end of the sand hopper (5.3) is connected to the lower end of the screw conveyor (5.2). A discharge pump (5.4) is provided at the outlet end of the mixing tank (5.1). The outlet end of the discharge pump (5.4) is connected to the inlet of the second fracturing pump truck (8) through a drainage pipeline (5.13).

[0007] Preferably, a regulating valve (5.10) is installed on the inlet pipe (5.12) connected to the inlet of the above-mentioned mixing tank (5.1), and the outer end of the inlet pipe (5.12) is connected to the inlet connector (5.12.1).

[0008] Preferably, a pressure transmitter (5.7), a flow meter (5.8), and a control valve (5.14) are installed on the drain line (5.13) connected to the outlet of the above-mentioned discharge pump (5.4), and the outer end of the drain line (5.13) is connected to the connecting manifold (6) through multiple external discharge control valves (5.9).

[0009] Preferably, a frequency converter chamber (5.15) is also installed on the main body (5.5) of the sand mixing skid. A liquid filling pump (5.6) is installed below the frequency converter chamber (5.15). The output end of the liquid filling pump (5.6) is connected to the mixing tank (5.1) through a liquid filling pipeline (5.6.1). A frequency converter (5.15.1) is installed inside the frequency converter chamber (5.15).

[0010] Preferably, the outer end of the above-mentioned drain line (5.13) is provided with a drain connector (5.13.1).

[0011] The beneficial effects of this utility model are as follows: By removing the liquid supply pump that was previously integrated on the sand mixing skid, and using a matching liquid supply skid placed closer to the water tank area to supply liquid to the sand mixing skid, the liquid supply pump is separated from the sand mixing skid and moved to an independent liquid supply skid, establishing a "sand mixing skid-liquid supply skid" dual-skid architecture. Furthermore, the sand mixing skid and the liquid supply skid are controlled through an instrument skid, thereby reducing the weight of the sand mixing skid by 42%, specifically from 15 tons to 8.7 tons. This also avoids the problem of having to disassemble the outer shell of the sand mixing skid and the three intersecting pipelines during fault repair, shortening the fault repair time. In addition, due to the addition of the liquid supply skid, the length of the first and second pipelines is shortened, reducing the probability of pipeline cavitation and effectively reducing the incidence of poor suction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a connection diagram of the sand mixing skid;

[0014] Figure 3 This is a schematic diagram of the front structure of the sand mixing skid;

[0015] Figure 4 This is a top-view structural diagram of the sand mixing skid;

[0016] Figure 5 This is a structural diagram of the sand mixing skid from the rear view.

[0017] In the diagram above: 1. Water tank; 2. Supply skid; 3. Control cable; 4. Instrument skid; 5. Sand mixing skid; 6. Connecting manifold; 7. First fracturing pump truck; 8. Second fracturing pump truck; 9. First pipeline; 10. Second pipeline; 2.1. First supply pump; 2.2. Second supply pump; 5.1. Mixing tank; 5.2. Screw conveyor; 5.3. Sand hopper; 5.4. Discharge pump; 5.5. Sand mixing skid body; 5.6. Addition pump; 5.7. Pressure transmitter; 5.8. Flow meter; 5.9. External discharge control valve; 5.10. Regulating valve; 5.11. Agitator; 5.12. Inlet pipeline; 5.13. Drain pipeline; 5.14. Control valve; 5.15. Inverter compartment; 5.6.1. Inlet connector; 5.12.1. Drain connector; 5.13.1. Inverter; 5.15.1 Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Example 1: The present invention discloses a split-type liquid supply and sand mixing skid system, the technical solution of which includes: a water tank 1, a liquid supply skid 2, a control cable 3, an instrument skid 4, a sand mixing skid 5, and a connecting manifold 6. The liquid supply pump 2.1 is installed on the liquid supply skid 2, and the sand mixing skid 5 is located beside the liquid supply skid 2, forming a double-skid structure of the sand mixing skid 5 and the liquid supply skid 2. The sand mixing skid 5 and the liquid supply skid 2 are connected to the instrument skid 4 through the control cable 3. The lower ends of multiple water tanks 1 are respectively connected to the inlet end of the first liquid supply pump 2.1 on the liquid supply skid 2 through a first pipeline 9. The first liquid supply pump 2.1... The outlet end of the water tank is fed into the first fracturing pump truck 7 through a pipeline; the lower ends of multiple water tanks 1 are respectively connected to the inlet end of the second liquid supply pump 2.2 on the liquid supply skid 2 through pipelines; the outlet end of the second liquid supply pump 2.2 is connected to the inlet pipeline 5.12 of the mixing tank 5.1 of the sand mixing skid 5 through the second pipeline 10; the outlet of the mixing tank 5.1 is connected to the connecting manifold 6 through the drain pipeline 5.13; the outlet end of the connecting manifold 6 is connected to the second fracturing pump truck 8 through a pipeline; the liquid addition pump 5.6 is connected to the outside of the mixing tank 5.1 through a pipeline.

[0020] Reference Figures 2-5The sand mixing skid 5 mentioned in this utility model includes a mixing tank 5.1, a screw conveyor 5.2, a sand hopper 5.3, a discharge pump 5.4, and a sand mixing skid body 5.5. The mixing tank 5.1, screw conveyor 5.2, sand hopper 5.3, and discharge pump 5.4 are installed on the sand mixing skid body 5.5. An agitator 5.11 is installed in the inner cavity of the mixing tank 5.1. A screw conveyor 5.2 is provided on one side of the mixing tank 5.1. The lower end of the sand hopper 5.3 is connected to the lower end of the screw conveyor 5.2. A discharge pump 5.4 is provided at the outlet end of the mixing tank 5.1. The outlet end of the discharge pump 5.4 is connected to the inlet of the second fracturing pump truck 8 through a drainage pipeline 5.13.

[0021] A regulating valve 5.10 is installed on the inlet pipe 5.12 connected to the inlet of the above-mentioned mixing tank 5.1, and the outer end of the inlet pipe 5.12 is connected to the inlet connector 5.12.1.

[0022] A pressure transmitter 5.7, a flow meter 5.8, and a control valve 5.14 are installed on the discharge pipeline 5.13 connected to the outlet of the aforementioned discharge pump 5.4. The outer end of the discharge pipeline 5.13 is connected to the connecting manifold 6 through multiple external discharge control valves 5.9.

[0023] The aforementioned sand mixing skid body 5.5 is also equipped with a frequency converter chamber 5.15. A liquid filling pump 5.6 is installed below the frequency converter chamber 5.15. The output end of the liquid filling pump 5.6 is connected to the mixing tank 5.1 through a liquid filling pipeline 5.6.1. A frequency converter 5.15.1 is installed inside the frequency converter chamber 5.15.

[0024] The outer end of the aforementioned drain line 5.13 is provided with a drain connector 5.13.1.

[0025] This invention removes the liquid supply pump previously integrated onto the sand mixing skid and utilizes a matching liquid supply skid placed closer to the water tank area to supply liquid to the sand mixing skid. By separating the liquid supply pump from the sand mixing skid to an independent liquid supply skid, a dual-skid architecture of "sand mixing skid-liquid supply skid" is established. Furthermore, the sand mixing skid and the liquid supply skid are controlled through an instrument skid, thereby reducing the weight of the sand mixing skid by 42%, specifically from 15 tons to 8.7 tons. This also avoids the need to disassemble the outer shell of the sand mixing skid and the three intersecting pipelines during fault repair, shortening the fault repair time. In addition, due to the addition of the liquid supply skid, the length of the first and second pipelines is shortened, reducing the probability of pipeline cavitation and effectively reducing the incidence of poor suction.

[0026] Example 2: The present invention discloses a split-type liquid supply and sand mixing skid system, the technical solution of which includes: a water tank 1, a liquid supply skid 2, a control cable 3, an instrument skid 4, a sand mixing skid 5, and a connecting manifold 6. The liquid supply pump 2.1 is installed on the liquid supply skid 2, and the sand mixing skid 5 is located beside the liquid supply skid 2, forming a double-skid structure of the sand mixing skid 5 and the liquid supply skid 2. The sand mixing skid 5 and the liquid supply skid 2 are connected to the instrument skid 4 through the control cable 3. The lower ends of multiple water tanks 1 are respectively connected to the inlet end of the first liquid supply pump 2.1 on the liquid supply skid 2 through a first pipeline 9. The first liquid supply pump 2.1... The outlet end of the water tank is fed into the first fracturing pump truck 7 through a pipeline; the lower ends of multiple water tanks 1 are respectively connected to the inlet end of the second liquid supply pump 2.2 on the liquid supply skid 2 through pipelines; the outlet end of the second liquid supply pump 2.2 is connected to the inlet pipeline 5.12 of the mixing tank 5.1 of the sand mixing skid 5 through the second pipeline 10; the outlet of the mixing tank 5.1 is connected to the connecting manifold 6 through the drain pipeline 5.13; the outlet end of the connecting manifold 6 is connected to the second fracturing pump truck 8 through a pipeline; the liquid addition pump 5.6 is connected to the outside of the mixing tank 5.1 through a pipeline.

[0027] The difference from Example 1 is:

[0028] The sand hopper 5.3 used in this embodiment has a right-angled triangular cross-section and is used to hold sand for fracturing.

[0029] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A split-type liquid supply and sand mixing skid system, characterized in that: The system includes a water tank (1), a liquid supply skid (2), a control cable (3), an instrument skid (4), a sand mixing skid (5), and a connecting manifold (6). A liquid supply pump (2.1) is installed on the liquid supply skid (2), and the sand mixing skid (5) is located on one side of the liquid supply skid (2), forming a double-skid structure of the sand mixing skid (5) and the liquid supply skid (2). The sand mixing skid (5) and the liquid supply skid (2) are connected to the instrument skid (4) via the control cable (3). The lower ends of multiple water tanks (1) are respectively connected to the inlet end of the first liquid supply pump (2.1) on the liquid supply skid (2) via a first pipeline (9). The outlet end of the first liquid supply pump (2.1) is fed into the first liquid supply skid (2) via a pipeline. A fracturing pump truck (7); the lower ends of multiple water tanks (1) are respectively connected to the inlet end of the second liquid supply pump (2.2) on the liquid supply skid (2) through pipelines, the outlet end of the second liquid supply pump (2.2) is connected to the inlet pipeline (5.12) of the mixing tank (5.1) of the sand mixing skid (5) through the second pipeline (10), the outlet of the mixing tank (5.1) is connected to the connecting manifold (6) through the drain pipeline (5.13), and the outlet end of the connecting manifold (6) is connected to the second fracturing pump truck (8) through pipelines; a liquid addition pump (5.6) is connected to the outside of the mixing tank (5.1) through pipelines.

2. The split-type liquid supply and sand mixing skid system according to claim 1, characterized in that: The sand mixing skid (5) includes a mixing tank (5.1), a screw conveyor (5.2), a sand hopper (5.3), a discharge pump (5.4), and a sand mixing skid body (5.5). The mixing tank (5.1), screw conveyor (5.2), sand hopper (5.3), and discharge pump (5.4) are installed on the sand mixing skid body (5.5). An agitator (5.11) is installed in the inner cavity of the mixing tank (5.1). A screw conveyor (5.2) is provided on one side of the mixing tank (5.1). The lower end of the sand hopper (5.3) is connected to the lower end of the screw conveyor (5.2). A discharge pump (5.4) is provided at the outlet end of the mixing tank (5.1). The outlet end of the discharge pump (5.4) is connected to the inlet of the second fracturing pump truck (8) through a drainage pipeline (5.13).

3. A split-type liquid supply and sand mixing skid system according to claim 2, characterized in that: A regulating valve (5.10) is installed on the inlet pipeline (5.12) connected to the inlet of the mixing tank (5.1), and the outer end of the inlet pipeline (5.12) is connected to the inlet connector (5.12.1).

4. A split-type liquid supply and sand mixing skid system according to claim 3, characterized in that: A pressure transmitter (5.7), a flow meter (5.8), and a control valve (5.14) are installed on the discharge pipeline (5.13) connected to the outlet of the discharge pump (5.4). The outer end of the discharge pipeline (5.13) is connected to the connecting manifold (6) through multiple external discharge control valves (5.9).

5. A split-type liquid supply and sand mixing skid system according to claim 2 or 4, characterized in that: The main body (5.5) of the sand mixing skid is also equipped with a frequency converter chamber (5.15). A liquid filling pump (5.6) is installed below the frequency converter chamber (5.15). The output end of the liquid filling pump (5.6) is connected to the mixing tank (5.1) through a liquid filling pipeline (5.6.1). A frequency converter (5.15.1) is installed inside the frequency converter chamber (5.15).

6. A split-type liquid supply and sand mixing skid system according to claim 5, characterized in that: The outer end of the drainage pipeline (5.13) is provided with a drainage connector (5.13.1).

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