CN211963190U

CN211963190U - Repeated recovery and utilization device for fracturing fluid

Info

Publication number: CN211963190U
Application number: CN202020588371.7U
Authority: CN
Inventors: 雷马腾; 张薇; 刘波
Original assignee: Xi'an Hongxiang Tengyu Petroleum Engineering Co ltd
Current assignee: Xi'an Hongxiang Tengyu Petroleum Engineering Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-11-20
Anticipated expiration: 2030-04-17

Abstract

The utility model relates to a petrochemical field, concretely relates to make things convenient for fracturing fluid to retrieve, reduce repeated recycle device of fracturing fluid of cost. A fracturing fluid reinjection device is arranged at the upper part of the separation box, and a discharge port is arranged at the lower part of the separation box and is matched with a corresponding first valve; a fracturing fluid recovery port is arranged in the middle of the separation box and is matched with a corresponding second valve, and an oil stain recovery port is arranged on the upper part of the separation box and is matched with a corresponding third valve; and a stirring device is matched at the bottom of the separation box. The utility model discloses a fracturing fluid is retrieved and is utilized device repeatedly will pour into the mixed liquid reinjection of underground fracturing fluid to the separator box through fracturing fluid reinjection device, through the agitating unit stirring for mixed liquid separation becomes precipitation part, fracturing fluid part and greasy dirt part, retrieves the fracturing fluid through the fracturing fluid recovery mouth after the separation, retrieves the greasy dirt through the greasy dirt, through discharge port discharge sediment material, has made things convenient for the recycle of fracturing fluid, has reduced the cost.

Description

Repeated recovery and utilization device for fracturing fluid

Technical Field

The utility model relates to a petrochemical field, concretely relates to make things convenient for fracturing fluid to retrieve, reduce repeated recycle device of fracturing fluid of cost.

Background

At present, unconventional oil and gas reservoirs of compact oil are being developed vigorously, and large-scale hydraulic fracturing is an economic and efficient mode for developing the oil reservoirs. In the process of simulating the laying form of a propping agent in a fracture network in large-scale hydraulic fracturing construction, a large amount of fracturing fluid containing a small amount of propping agent is discharged through a device (the fluid loss of the fracturing fluid in a field), and because the fracturing fluid contains a large amount of various additives, the direct discharge can cause environmental pollution, and meanwhile, during experimental simulation, water resources in a laboratory are also very short. At present, three different treatment processes are mainly used for fracturing flowback fluid on site, namely a reinjection treatment process, a standard-reaching discharge treatment process and a recycling treatment process. The reuse treatment process mainly combines the processes of oil removal, scale removal, suspended impurity removal and the like, and the treated flowback liquid is used for preparing the fracturing fluid again. In the laboratory analogue means, do not consider the device to fracturing fluid recycle among the experimental apparatus at present, after the experiment, fracturing fluid is not just directly discharged through handling.

In the oil exploitation process, the process of hydraulic fracturing of an oil layer is to use a high-pressure large-displacement pump on the ground, and by using the principle of liquid pressure transmission, liquid (generally called fracturing fluid) with certain viscosity is injected into the oil layer at a pressure greater than the absorption capacity of the oil layer, the pressure in a shaft is gradually increased, so that high pressure is suppressed at the bottom of the shaft, and when the pressure is greater than the ground stress near the wall of the well and the tensile strength of stratum rocks, cracks are generated in the stratum near the bottom of the shaft: and continuously injecting a sand carrying fluid with a propping agent, extending the fracture forwards and filling the fracture with the propping agent, and closing the fracture on the propping agent after closing the well, so that a sand filling fracture with a certain geometric dimension and high flow conductivity is formed in the stratum near the bottom of the well, and the purpose of increasing production and injection of the well is achieved. The commonly used propping agents include quartz sand, ceramsite and the like.

Because its reality of fracturing fluid is the mixed liquid, mixes there is additive etc. and the additive persists in fracturing fluid after the use, causes the waste, has increased the cost, consequently awaits urgent need a recovery unit, retrieves fracturing fluid reuse in order to reduce the cost.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a make things convenient for fracturing fluid to retrieve, reduce the repeated recycle device of fracturing fluid of cost.

The utility model provides a scheme that above-mentioned problem was taken is: the fracturing fluid recycling device comprises a separation box, wherein a fracturing fluid reinjection device is arranged at the upper part of the separation box, and a discharge port is arranged at the lower part of the separation box and is matched with a corresponding first valve; a fracturing fluid recovery port is arranged in the middle of the separation box and is matched with a corresponding second valve, and an oil stain recovery port is arranged on the upper part of the separation box and is matched with a corresponding third valve; and a stirring device is matched at the bottom of the separation box.

Furthermore, in order to better realize the utility model, the fracturing fluid reinjection device comprises a support frame fixed on the side part of the separation box, a reinjection pump is arranged on the support frame, and the reinjection pump is matched with a liquid pumping pipe and a liquid outlet pipe which is communicated with the upper part of the separation box; the liquid pumping pipe and the liquid outlet pipe are matched with a packing auger.

Furthermore, in order to better realize the utility model, the stirring device comprises a stirring motor which is arranged outside the bottom of the separation box; the rotating shaft of the stirring motor vertically extends into the separation box and is matched with a corresponding bearing and a corresponding sealing ring.

Further, for better realization the utility model discloses, the axis of rotation on be provided with a plurality of stirring vane.

Further, for better realization the utility model discloses, the bottom of separator box be provided with the drain pan, agitator motor install the inside bottom at this drain pan.

Further, for better realization the utility model discloses, the inside of separator box be provided with fracturing fluid recovery mouth complex filter screen.

Further, for better realization the utility model discloses, the filter screen be to the inside arc that arches of separator box.

Further, for better realization the utility model discloses, the separator box adopt stainless steel material to make and form.

The beneficial effects of the utility model are embodied in: the utility model discloses a fracturing fluid is recovery and utilization device again, through the separator box, fracturing fluid reinjection device, agitating unit, the cooperation of mouth and fracturing fluid recovery mouth etc is retrieved to the greasy dirt, mix the liquid reinjection to the separator box of the mixed liquid of fracturing fluid that will pour into underground through fracturing fluid reinjection device, through the agitating unit stirring, make mixed liquid separation become the precipitation part, fracturing fluid part and greasy dirt part, retrieve fracturing fluid through the fracturing fluid recovery mouth after the separation, retrieve the greasy dirt through the greasy dirt recovery mouth, discharge the sediment material through the discharge port, make things convenient for the recycle of fracturing fluid, the cost is reduced.

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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of the fracturing fluid recycling device of the present invention;

in the attached figure, 1-a separation box, 2-a discharge port, 3-a support frame, 4-a reinjection pump, 5-a liquid pumping pipe, 6-a liquid outlet pipe, 7-a packing auger, 8-a stirring motor, 9-a rotating shaft, 10-a stirring blade, 11-a bottom shell, 12-a fracturing fluid recovery port, 13-a second valve, 14-a filter screen, 15-an oil stain recovery port, 16-a third valve, 18-a precipitation part, 19-a fracturing fluid part, 20-an oil stain part and 21-a first valve.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Example 1:

as shown in fig. 1, the fracturing fluid recycling device of the present invention comprises a separation box 1, wherein a fracturing fluid refilling device is arranged at the upper part of the separation box 1, and a discharge port 2 is arranged at the lower part of the separation box 1 and is matched with a corresponding first valve 21; a fracturing fluid recovery port 12 is arranged in the middle of the separation box 1 and is matched with a corresponding second valve 13, and an oil stain recovery port 15 is arranged on the upper part of the separation box 1 and is matched with a corresponding third valve 16; and a stirring device is matched at the bottom of the separation box 1. The utility model discloses a fracturing fluid is recovery and utilization device again, through separator box 1, fracturing fluid reinjection device, agitating unit, the cooperation of mouth 15 and fracturing fluid recovery mouth 12 etc. is retrieved to the greasy dirt, mix the liquid reinjection to separator box 1 through fracturing fluid reinjection device with the fracturing fluid that pours into underground into, through the agitating unit stirring, make mixed liquid separation become precipitation part 18, fracturing fluid part 19 and greasy dirt part 20, retrieve the fracturing fluid through fracturing fluid recovery mouth 12 after the separation, retrieve the greasy dirt through mouth 15 through the greasy dirt, discharge the sediment material through discharge port 2, the recycle of fracturing fluid has been made things convenient for, the cost is reduced. When the fracturing fluid mixture pours into separator box 1 into, the agitating unit stirring, after fracturing fluid mixed liquid is a little higher than greasy dirt part 20, stop pouring into, agitating unit continued stirring this moment for quartz sand among the fracturing fluid mixed liquid etc. precipitate sediment part 18, and the greasy dirt floats in greasy dirt part 20, and the fracturing fluid is located middle fracturing fluid part 19, can retrieve the greasy dirt earlier this moment, then retrieve the fracturing fluid again, if the sediment part accumulation is more than the time through discharge port 2 emission. If the discharge port 2 is blocked, the discharge can be realized by an auger mechanism.

Example 2:

the embodiment is further optimized on the basis of the above embodiment, the fracturing fluid reinjection device comprises a support frame 3 fixed on the side part of the separation box 1, a reinjection pump 4 is arranged on the support frame 3, and the reinjection pump 4 is matched with a liquid pumping pipe 5 and a liquid outlet pipe 6, and the liquid outlet pipe 6 is communicated with the upper part of the separation box 1; the liquid pumping pipe 5 and the liquid outlet pipe 6 are matched with a packing auger 7. When reinjecting fracturing fluid mixed liquid, start reinjection pump 4, fracturing fluid mixed liquid gets into separator box 1 from liquid suction pipe 5, drain pipe 6, under the cooperation of auger 7, can improve the smoothness degree, avoids the condition of jam.

Example 3:

the embodiment is further optimized on the basis of the above embodiment, and the stirring device comprises a stirring motor 8, wherein the stirring motor 8 is arranged outside the bottom of the separation box 1; and a rotating shaft 9 of the stirring motor 8 vertically extends into the separation box 1 and is matched with a corresponding bearing and a corresponding sealing ring. After the design, start agitator motor 8, drive axis of rotation 9 and rotate, stir fracturing fluid miscella, the convenient separation. Furthermore, the rotating shaft 9 is provided with a plurality of stirring blades 10, so that the stirring effect can be improved, and the separation of the mixed fracturing fluid is facilitated.

Example 4:

the present embodiment is further optimized on the basis of the above embodiment, a bottom shell 11 is arranged at the bottom of the separation box 1, and the stirring motor 8 is installed at the inner bottom of the bottom shell 11. After the design, the bottom shell 11 plays a supporting role, and the stirring motor 8 is prevented from being directly used as a supporting part.

Example 5:

the present embodiment is further optimized based on the above embodiments, and a filter screen 14 matched with the fracturing fluid recovery port 12 is arranged inside the separation box 1. After the design, floccule which cannot be precipitated to the precipitation part 18 can be effectively filtered, and the purity of the fracturing fluid is improved.

Example 5:

this embodiment is further optimized on the basis of the above-mentioned embodiment, and the filter screen 14 is in an arc shape that is arched toward the inside of the separation box 1. The filter screen 14 is set to be in an arc shape which is arched towards the inside of the separation box 1, and after the design, the collection of floccules on the filter screen 14 can be reduced, and the blockage is reduced.

Example 6:

the present embodiment is further optimized on the basis of the above embodiments, and the separation box 1 is made of stainless steel material.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. Fracturing fluid is repeated recycles device, its characterized in that: the device comprises a separation box (1), wherein a fracturing fluid reinjection device is arranged at the upper part of the separation box (1), a discharge port (2) is arranged at the lower part of the separation box, and a corresponding first valve (21) is matched with the discharge port; a fracturing fluid recovery port (12) is arranged in the middle of the separation box (1) and is matched with a corresponding second valve (13), and an oil stain recovery port (15) is arranged on the upper part of the separation box (1) and is matched with a corresponding third valve (16); the bottom of the separation box (1) is matched with a stirring device.

2. The fracturing fluid recycling device of claim 1, wherein: the fracturing fluid reinjection device comprises a support frame (3) fixed on the side part of the separation box (1), a reinjection pump (4) is arranged on the support frame (3), the reinjection pump (4) is matched with a liquid pumping pipe (5) and a liquid outlet pipe (6), and the liquid outlet pipe (6) is communicated with the upper part of the separation box (1); the liquid pumping pipe (5) and the liquid outlet pipe (6) are matched with a packing auger (7).

3. The apparatus for recycling fracturing fluid according to claim 1 or 2, wherein: the stirring device comprises a stirring motor (8), and the stirring motor (8) is arranged outside the bottom of the separation box (1); and a rotating shaft (9) of the stirring motor (8) vertically extends into the separation box (1) and is matched with a corresponding bearing and a corresponding sealing ring.

4. The apparatus for recycling fracturing fluid according to claim 3, wherein: a plurality of stirring blades (10) are arranged on the rotating shaft (9).

5. The apparatus for recycling fracturing fluid according to claim 4, wherein: a bottom shell (11) is arranged at the bottom of the separation box (1), and the stirring motor (8) is arranged at the bottom inside the bottom shell (11).

6. The fracturing fluid recycling device of claim 1, wherein: a filter screen (14) matched with the fracturing fluid recovery port (12) is arranged in the separation box (1).

7. The fracturing fluid recycling device of claim 6, wherein: the filter screen (14) is in an arc shape which is arched towards the inside of the separation box (1).

8. The fracturing fluid recycling device of claim 1, wherein: the separation box (1) is made of stainless steel materials.