Oil and gas well fracturing fluid flowback treatment system

Abstract

An oil and gas well fracturing fluid flowback treatment system comprises a propelling cylinder, a connecting mechanism and a reaction box. The propelling cylinder comprises a propelling cylinder body and a separation block; the separation block is arranged in the propelling cylinder in a sliding manner; the connecting mechanism is used for communicating the two adjacent propelling cylinders; the reaction box comprises a reaction box body, a liquid discharging block, a filtering plate, a feeding pipe, a material pumping machine, a feeding pipe and a treating fluid conveying pipe; the feeding pipe is communicated with the propelling barrel body and the reaction box body; one end of the feeding pipe is communicated with the interior of the reaction box body, and the other end is connected to the fracturing fluid supply end; the liquid discharging block is arranged in the reaction box body in a sliding manner; the material pumping machine is arranged on one side of the reaction box body and is communicated with the interior of the reaction box body; the filter plate is arranged in the reaction box body in a sliding manner; one end of the treating fluid delivery pipe is communicated with the interior of the reaction box body, and the other end is connected to the treating fluid supply end. The problem that the fracturing fluid is difficult to pump to the ground due to the fact that the fracturing fluid is high in viscosity and turbidity before being treated in the process of conveying the fracturing fluid from the underground is solved.

Description

Technical Field

[0001] The utility model relates to the field of fracturing fluid flowback, in particular to an oil and gas well fracturing fluid flowback processing system. Background Art

[0002] Fracturing flowback fluid contains a large amount of harmful suspended solids, refractory organic matter, petroleum and other pollutants. These flowback fluids usually have high viscosity, high turbidity, high COD (chemical oxygen demand) values ​​and other characteristics, which are very difficult to handle. In the process of transporting the fracturing fluid from the well, it is difficult to pump it up to the ground for treatment because of its high viscosity and turbidity before treatment, and the high pressure when using existing pipelines to transport it deep underground. Therefore, a treatment system that can treat the fracturing fluid first and then flow it back is needed. Utility Model Content

[0003] The utility model aims to provide an oil and gas well fracturing fluid flowback processing system, which solves the problem that it is difficult to pump the fracturing fluid to the ground during the process of transporting it from the well due to its high viscosity and high turbidity before processing.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] An oil and gas well fracturing fluid flowback processing system, comprising:

[0006] The propulsion cylinder comprises a propulsion cylinder body and a partition block; the propulsion cylinder body is hollow inside; the partition block is slidably arranged inside the propulsion cylinder body;

[0007] A connecting mechanism, used to connect two adjacent propulsion cylinders and make their interiors communicate with each other;

[0008] The reaction box includes a reaction box body, a drainage block, a filter plate, a feeding pipe, a pumping machine and a feeding pipe; the reaction box body is hollow inside and is arranged beside the propulsion cylinder; the two ends of the feeding pipe are respectively connected to the interior of the propulsion cylinder and the reaction box body; one end of the feeding pipe is connected to the interior of the reaction box body, and the other end is connected to the fracturing fluid supply end; the drainage block is slidably arranged inside the reaction box body and moves toward the feeding pipe; the pumping machine is arranged on one side of the reaction box body and is connected to the interior of the reaction box body; the filter plate is slidably arranged inside the reaction box body and moves toward the pumping machine.

[0009] The propulsion cylinder is provided with a first driving part for driving the partition block to move along the inner side wall of the propulsion cylinder.

[0010] The first driving part includes a first motor and a first screw rod; the first screw rod is arranged inside the propulsion cylinder and along the axial direction of the propulsion cylinder; the first motor is arranged at one end of the first screw rod, and is used to drive it to rotate and drive the partition block to move.

[0011] The separation block is provided with a threaded through hole and a separation valve; the first screw rod passes through the threaded through hole.

[0012] The separation valve is a one-way valve.

[0013] The connecting mechanism includes an output pipe, a transition valve and an input pipe; one end of the output pipe is connected to one end of the propulsion cylinder, and the other end is connected to the transition valve; one end of the input pipe is connected to the transition valve, and the other end is connected to the adjacent propulsion cylinder.

[0014] The reaction box is provided with a second driving unit and a third driving unit; the second driving unit is used to drive the liquid drainage block to move; the third driving unit is used to drive the filter plate to move.

[0015] The second driving part includes a second motor and a second screw rod; the second screw rod is arranged on the inner wall of the reaction box body, and one end thereof is arranged toward the direction of the propulsion cylinder; the second motor is arranged at one end of the first screw rod, for driving it to rotate and drive the drainage block to move.

[0016] The third driving part includes a third motor and a third screw rod; the third screw rod is arranged inside the reaction box, and one end of the third screw rod is arranged toward the pumping machine; the third motor is arranged at one end of the third screw rod, and is used to drive it to rotate and drive the filter plate to move.

[0017] The treatment fluid supplied by the treatment fluid supply end is a fracturing fluid flocculant.

[0018] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0019] The utility model discloses an oil and gas well fracturing fluid flowback processing system. The device firstly passes the fracturing fluid into a reaction box, adds a fracturing fluid flocculant and allows the fracturing fluid to settle, then filters out the solid matter precipitated therein through a filter plate, and extracts it through a pumping machine, thereby avoiding the solid matter from clogging the device, and then passes the filtered liquid into a plurality of propulsion cylinders, and then the fracturing fluid is transported to the ground through layer-by-layer propulsion. Since the device adopts a layer-by-layer propulsion method, there is no need to consider the pressure factor of the existing delivery pipe when transporting underground, thereby greatly reducing the difficulty of underground transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 Yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 Yes Figure 1 Enlarged view of point B in the middle.

[0023] In the figure, 101-propelling cylinder, 102-first motor, 103-first screw, 104-partitioning block, 105-partitioning valve, 2-connecting mechanism, 201-output pipe, 202-transition valve, 203-input pipe, 204-hanging ring, 205-hanging rope, 3-reaction box, 301-reaction box, 302-second motor, 303-second screw, 304-drainage block, 305-third motor, 306-third screw, 307-filter plate, 308-pumping machine, 309-feeding pipe, 310-feeding pipe, 311-feeding valve, 312-feeding pipe, 313-treated liquid delivery pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, a fracturing fluid flowback processing system for oil and gas wells includes a propulsion cylinder, a connecting mechanism 2 and a reaction box 3; the reaction box 3 is arranged beside the propulsion cylinder, and the two are connected by a feeding pipe 312; the feeding pipe 312 is also provided with a feeding valve 311; the connecting mechanism 2 is used to connect two adjacent propulsion cylinders and make their interiors communicate;

[0027] Specifically, the feed pipe 312 is connected to the propulsion cylinder and the reaction box 3 respectively through flanges, and the connection points are sealed.

[0028] like Figure 1As shown, the propulsion cylinder includes a propulsion cylinder body 101, a first motor 102, a first screw rod 103 and a partition block 104; the propulsion cylinder body 101 is a rectangular column, which is hollow inside; the partition block 104 is provided with a threaded through hole and a partition valve 105; the first screw rod 103 is arranged inside the propulsion cylinder body 101, arranged along the axial direction of the propulsion cylinder body 101, and cooperates to pass through the threaded through hole; the first motor 102 is arranged on one side of the propulsion cylinder body 101, and is connected to one end of the first screw rod 103, for driving it to rotate, and driving the partition block 104 to slide along the first screw rod 103 and arranged inside the propulsion cylinder body 101;

[0029] Specifically, the separation valve 105 is a one-way valve;

[0030] More specifically, a seal is provided at the contact point between the partition block 104 and the inner wall of the propulsion cylinder 101 .

[0031] like Figure 2 As shown, the connection mechanism 2 includes an output pipe 201, a transition valve 202, an input pipe 203, a plurality of hanging rings 204 and a plurality of hanging ropes 205; one end of the output pipe 201 is connected to one end of the propulsion cylinder 101, and the other end is connected to the transition valve 202; one end of the input pipe 203 is connected to the transition valve 202, and the other end is connected to the adjacent propulsion cylinder 101; the hanging rings 204 are respectively provided at the two ends of the two adjacent propulsion cylinders 101; the two ends of the hanging rope 205 are respectively connected to the hanging rings 204 on the two adjacent propulsion cylinders 101;

[0032] Specifically, the output pipe 201 and the input pipe 203 are connected to the propulsion cylinder 101 via flanges, and seals are provided at the connection points.

[0033] like Figure 3As shown, the reaction box 3 includes a reaction box body 301, a second motor 302, a second screw rod 303, a drainage block 304, a third motor 305, a third screw rod 306, a filter plate 307, a feeding pipe 310 and a pumping machine 308; the reaction box body 301 is a rectangular body, and its interior is hollow; one end of the feeding pipe 310 is connected to the interior of the reaction box body 301, and the other end thereof is connected to the fracturing fluid supply end; the drainage block 304 is slidably arranged in the reaction box body 301, and moves toward the feeding pipe 312; the second screw rod 303 is arranged on the inner side wall of the reaction box body 301, and one end thereof is arranged toward the direction of the propulsion cylinder 101; the second motor 302 The first screw rod 303 is provided at one end thereof, and is used to drive the first screw rod 303 to rotate, and to drive the liquid discharge block 304 to move; the material extractor 308 is provided at one side of the reaction box 301, and is connected to the inside thereof; the filter plate 307 is slidably provided inside the reaction box 301, and moves toward the material extractor 308; the third screw rod 306 is provided inside the reaction box 301, and one end thereof is provided toward the material extractor 308; the third motor 305 is provided at one end of the third screw rod 306, and is used to drive the third screw rod 306 to rotate, and to drive the filter plate 307 to move; it should be noted that the material extractor 308 is a prior art, and is not an improvement of the present embodiment, and is not described in detail here;

[0034] Specifically, the treatment fluid supplied by the treatment fluid supply end is a fracturing fluid flocculant; it should be noted that the fracturing fluid flocculant is a prior art and is not an improvement of this embodiment, and will not be described in detail here.

[0035] The working principle of this embodiment is:

[0036] The utility model discloses an oil and gas well fracturing fluid flowback treatment system, which firstly introduces the fracturing fluid into a reaction box 3, adds a fracturing fluid flocculant and allows the fracturing fluid to settle to precipitate solid matter, then lifts the filter plate 307 upward to filter out the precipitated solid matter, brings it close to the pumping machine 308, and pumps it out through the pumping machine 308, thereby avoiding the solid matter from clogging the device, then moves the liquid discharge block 304 to push the filtered liquid to the feed pipe 312, opens the feed valve 311 to allow the filtered liquid to pass into the propulsion cylinder, then lifts the partition block 104 upward to push the liquid above it into the output pipe 201 at the top thereof, and then passes through the transition valve 202 and the input pipe 203 in turn, so that the liquid therein is discharged into the next propulsion cylinder, in which the partition block 104 moves downward to allow the liquid below it to pass through the partition valve 105 and flow to the top thereof, and then repeats the above process to complete the fracturing fluid flowback treatment.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil and gas well fracturing fluid flowback processing system, characterized in that: include: The propulsion cylinder comprises a propulsion cylinder body and a partition block; the propulsion cylinder body is hollow inside; the partition block is slidably arranged inside the propulsion cylinder body; A connecting mechanism, used to connect two adjacent propulsion cylinders and make their interiors communicate with each other; The reaction box includes a reaction box body, a drainage block, a filter plate, a feeding pipe, a pumping machine, a feeding pipe and a treatment liquid delivery pipe; the reaction box body is hollow inside and is arranged beside the propulsion cylinder; the two ends of the feeding pipe are respectively connected to the interior of the propulsion cylinder and the reaction box body; one end of the feeding pipe is connected to the interior of the reaction box body, and the other end thereof is connected to the fracturing fluid supply end; the drainage block is slidably arranged inside the reaction box body and moves toward the feeding pipe; the pumping machine is arranged on one side of the reaction box body and is connected to the interior of the reaction box body; the filter plate is slidably arranged inside the reaction box body and moves toward the pumping machine; one end of the treatment liquid delivery pipe is connected to the interior of the reaction box body, and the other end thereof is connected to the treatment liquid supply end.

2. The oil and gas well fracturing fluid flowback processing system according to claim 1, characterized in that: The propulsion cylinder is provided with a first driving part for driving the partition block to move along the inner side wall of the propulsion cylinder.

3. The oil and gas well fracturing fluid flowback processing system according to claim 2, characterized in that: The first driving part includes a first motor and a first screw rod; the first screw rod is arranged inside the propulsion cylinder and along the axial direction of the propulsion cylinder; the first motor is arranged at one end of the first screw rod, and is used to drive it to rotate and drive the partition block to move.

4. The oil and gas well fracturing fluid flowback processing system according to claim 3, characterized in that: The separation block is provided with a threaded through hole and a separation valve; the first screw rod passes through the threaded through hole.

5. The oil and gas well fracturing fluid flowback processing system according to claim 4, characterized in that: The separation valve is a one-way valve.

6. The oil and gas well fracturing fluid flowback processing system according to claim 1, characterized in that: The connecting mechanism includes an output pipe, a transition valve and an input pipe; one end of the output pipe is connected to one end of the propulsion cylinder, and the other end is connected to the transition valve; one end of the input pipe is connected to the transition valve, and the other end is connected to the adjacent propulsion cylinder.

7. The oil and gas well fracturing fluid flowback processing system according to claim 1, characterized in that: The reaction box is provided with a second driving unit and a third driving unit; the second driving unit is used to drive the liquid drainage block to move; the third driving unit is used to drive the filter plate to move.

8. The oil and gas well fracturing fluid flowback processing system according to claim 7, characterized in that: The second driving part includes a second motor and a second screw rod; the second screw rod is arranged on the inner wall of the reaction box body, and one end thereof is arranged toward the direction of the propulsion cylinder; the second motor is arranged at one end of the first screw rod, for driving it to rotate and drive the drainage block to move.

9. The oil and gas well fracturing fluid flowback processing system according to claim 7, characterized in that: The third driving part includes a third motor and a third screw rod; the third screw rod is arranged inside the reaction box, and one end of the third screw rod is arranged toward the pumping machine; the third motor is arranged at one end of the third screw rod, and is used to drive it to rotate and drive the filter plate to move.

10. The oil and gas well fracturing fluid flowback processing system according to claim 1, characterized in that: The treatment fluid supplied by the treatment fluid supply end is a fracturing fluid flocculant.

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