CN205858309U - A kind of mud settling tank and use the fracturing fluid recovery (backflow) device of this mud settling tank - Google Patents

Abstract

The utility model discloses a kind of mud settling tank and use the fracturing fluid recovery (backflow) device of this mud settling tank.Mud settling tank includes tank body, it is provided with in tank body and erects the baffle plate being fixed on bottom surface, the inner chamber of tank body is spaced sand setting chamber and without sand chamber by barrier partitions, and at the top of baffle plate and/or be arranged over flow channels, tank body is provided with and enters the inlet in sand setting chamber for liquid and for liquid from the liquid outlet discharged without sand chamber.In this utility model, the tank inner chamber of mud settling tank is separated into sand setting chamber and without sand chamber by baffle plate, so that fracturing outlet liquid is after entering tank body from inlet, first settle in sand setting chamber, liquid without sand after sedimentation overflows to without sand chamber from the flow channels at baffle plate top and/or top again, then it is discharged to Water Tank from liquid outlet, with by the sedimentation in sand setting chamber of the gravel in fracturing outlet liquid, make the liquid that overflow goes out from sand setting chamber will not be mingled with gravel, thus decrease sand content in fracturing outlet liquid, it is simple to the cleaning of Water Tank.

Description

A kind of mud settling tank and use the fracturing fluid recovery (backflow) device of this mud settling tank

Technical field

This utility model relates to a kind of mud settling tank and uses the fracturing fluid recovery (backflow) device of this mud settling tank.

Background technology

The unconventionaloil pool such as tight sand oil gas, shale gas hide the emphasis having become domestic and international exploration and development.In order to improve Well yield, oil-gas field development benefit, extensive staged fracturing of horizontal well is that current unconventional petroleum resources effective exploitation is relative Ripe technological means.Being currently based on environmental protection needs, most of oil gas well starts just using " drilling fluid does not lands " from drilling well Technology, therefore well site will not be provided with cesspool, and therefore Oil/gas Well is put after emergent discharge opeing after sand plug and pressure in fracturing process It is necessary that by " fracturing outlet liquid does not lands " technology during spray discharge opeing.

At present, Oil Field is taked to be directly discharged into fracturing fluid recovery (backflow) liquid the method for Water Tank and is solved that " fracturing outlet liquid is not Land " problem, but owing to on-the-spot Water Tank is less, the emergent row brought due to problems such as sand plugs in pressing crack construction process Easily lead to Water Tank volume after liquid and pressure during quick fluid-discharge make to return discharging liquid not and leak and bring environmental pollution, Thus suspend quick fluid-discharge after emergent discharge opeing or pressure, suspend the emergent row used in pressing crack construction process due to problems such as sand plugs Liquid easily lead in well cannot de-plugging timely and effectively, and after pressing, during quick fluid-discharge, suspend discharge opeing, or cause due to pressure Split liquid to discharge ground in time and bring reservoir pollution, even result in Oil/gas Well and cannot naturally spray logical.In order to quick after pressure break Discharge opeing, is generally added with foaming agent and liquid nitrogen, quick fluid-discharge after discharge opeing and the pressure of therefore meeting an urgent need in fracturing process in current fracturing fluid During return and be discharged in the liquid on ground include a large amount of foam, cause the delivered payload capability of Water Tank to decline so that fracturing process In emergent discharge opeing with press after during quick fluid-discharge Water Tank deficiency particularly problematic.It addition, arrange in emergent discharge opeing and open flow During liquid, return and be discharged to the fracturing sand on ground and be directly entered Water Tank, thus be difficult to detection and return the fracturing sand volume being discharged to ground, Simultaneously because without special sand-catching apparatus, after fracturing sand is taken out of ground by fracturing fluid, have fracturing sand in all Water Tanks can be caused, Thus bring difficulty for the cleaning of Water Tank ground.

Utility model content

The purpose of this utility model is to provide a kind of minimizing and returns the mud settling tank of sand content in discharge opeing, additionally provides one simultaneously Use the fracturing fluid recovery (backflow) device of this mud settling tank.

In order to realize object above, in this utility model, the technical scheme of mud settling tank is as follows:

Mud settling tank, including tank body, is provided with in tank body and erects the baffle plate being fixed on bottom surface, and the inner chamber of tank body is by barrier partitions For spaced sand setting chamber with without sand chamber, and at the top of baffle plate and/or be arranged over overflowing to nothing for sand setting intracavity liquid Flow channels in sand chamber, is provided with on tank body and enters the inlet in sand setting chamber for liquid and for liquid from going out of discharging without sand chamber Liquid mouth.

Liquid outlet is in the bottom of tank body, and flow channels is in the top of liquid outlet.

Inlet is on the tank skin of the tank body above sand setting chamber.

Controlled valve for controlling switch is installed on liquid outlet.

In this utility model, the technical scheme of fracturing fluid recovery (backflow) device is as follows:

Fracturing fluid recovery (backflow) device, including the Water Tank for storing fracturing outlet liquid, in the import of Water Tank connect have heavy Sand tank, mud settling tank includes tank body, is provided with and erects the baffle plate being fixed on bottom surface in tank body, and the inner chamber of tank body is phase by barrier partitions Mutually interval sand setting chamber and without sand chamber, and at the top of baffle plate and/or be arranged over overflowing to without sand chamber for sand setting intracavity liquid In flow channels, tank body is provided with and enters the inlet in sand setting chamber for liquid and go out liquid from discharge without sand chamber for liquid Mouthful.

The liquid outlet of mud settling tank is in the bottom of tank body, and flow channels is in the top of liquid outlet, mud settling tank go out liquid Mouth is in above the import of Water Tank.

Mud settling tank is in the top of Water Tank.

Inlet is on the tank skin of the tank body above sand setting chamber.

Controlled valve for controlling switch is installed on liquid outlet.

Water Tank has two or more, the bottom of each Water Tank to be equipped with connected entrance, passes through connecting pipe between each connected entrance It is interconnected.

In this utility model, the tank inner chamber of mud settling tank is separated into sand setting chamber and without sand chamber by baffle plate, so that fracturing outlet liquid Entering after tank body from inlet, first settling in sand setting chamber, the liquid without sand after sedimentation is again from baffle plate top and/or top Flow channels overflows to, without in sand chamber, then be discharged to Water Tank from liquid outlet, to be sunk by gravel in fracturing outlet liquid Sedimentation in sand chamber so that the liquid that overflow goes out from sand setting chamber will not be mingled with gravel, thus decrease in fracturing outlet liquid and contain Sand amount, it is simple to the cleaning of Water Tank.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of fracturing fluid recovery (backflow) device of the present utility model；

Fig. 2 is the left view of Fig. 1；

Fig. 3 is the structural representation of mud settling tank in Fig. 2.

Detailed description of the invention

The embodiment of fracturing fluid recovery (backflow) device in this utility model: as shown in Figure 1 to Figure 3, this fracturing fluid recovery (backflow) device is A kind of pressing crack construction is met an urgent need Rapid drainage device after discharge opeing and pressure, and including Water Tank 2 and mud settling tank, wherein mud settling tank is in sewage The top of tank 2 is also connected in the import of Water Tank 2.

Mud settling tank includes that tank body 1, the inside of tank body 1 are provided with and erects the baffle plate 11 being fixed on bottom surface, the height of baffle plate 11 The slightly below height of tank body 1, with by baffle plate 11 inner chamber of tank body 1 is divided between left and right every sand setting chamber and without sand chamber.Heavy Sand chamber is connected by the flow channels of the bridge-type above baffle plate 11 with without sand chamber, it is possible to make pot liquid and foam sand setting chamber with Chamber without sand can be with free flow.The facade cavity wall in sand setting chamber is provided with graduated scale, and being arranged over of sand setting chamber is in tank body 1 Inlet 12 on the tank skin of top, this inlet 12 for pressure break meet an urgent need discharge opeing with press after quick fluid-discharge pipeline, facilitate pressure break to return Discharge opeing enters in sand setting chamber.The top of tank body 1 is additionally provided with an inspection opening, and inspection opening is provided with handle 15, and staff can To open inspection opening by this handle, thus sand setting volume and entering in mud settling tank in observing mud settling tank, mud settling tank is entered Row cleaning.The bottom of tank body 1 is provided with the liquid outlet 14 being in the cavity wall without sand chamber, and liquid outlet 14 connects the chamber without sand chamber, And on liquid outlet 14, it being equipped with controlled valve 13, this controlled valve 13 is off valve, and controlled valve 13 connects a fixed length The transfer line of degree, the outlet of transfer line is connected in the import of Water Tank 2, using in sand setting pot liquid and flow process its The flow channel of his Water Tank 2.

Water Tank 2 has several, is placed in same level, and in each Water Tank 2, the end face of is provided with by defeated The import of the liquid outlet 14 of liquid pipeline connection mud settling tank, the bottom of each Water Tank 2 is equipped with connected entrance 22, between each connected entrance 22 It is interconnected by connecting pipe 21, in order to mud settling tank relies on gravity to flow into one of them Water Tank 2 smoothly without sand liquid After, then in the linker connected without sand liquid drain to each Water Tank 2 by connecting pipe 21.The volume of Water Tank 2 Can enter ground liquid measure according to pressing crack construction arbitrarily to set, shape is designed as square, facilitates mud settling tank to be firmly positioned over dirt Above water pot 2.

In the present embodiment, the operation principle of fracturing fluid recovery (backflow) device is: quick fluid-discharge after meet an urgent need in fracturing process discharge opeing and pressure After the mud settling tank of middle use can make fracturing outlet liquid enter tank body 1, the effect at the fracturing sand self gravitation returning discharge is sunk Sand setting chamber in mud settling tank drops, thus the fracturing sand cubing avoided fracturing sand to enter other Water Tanks 2 and bring and sewage The problems such as difficulty cleared up by tank 2.After discharge opeing and the pressure of meeting an urgent need in fracturing process in the present embodiment, quick fluid-discharge flow process can make pressure break After returning discharge opeing entrance Water Tank 2, the foam in liquid exists only in the Water Tank 2 below mud settling tank, thus avoids foam to enter Enter other Water Tanks 2, thus affect Water Tank 2 return discharge opeing delivered payload capability.After discharge opeing and the pressure of meeting an urgent need in fracturing process quickly Water Tank 2 below mud settling tank can add the sewage below the chemical substance elimination mud settling tanks such as defoamer during discharge opeing Foam in tank 2, thus increase the delivered payload capability of Water Tank 2 further.

In the above-described embodiments, liquid outlet is in the bottom without sand chamber, and in other embodiments, liquid outlet can also be in The middle part in chamber without sand or top, will discharge without returning discharge opeing without sand in sand chamber by the form of overflow.Certainly, liquid outlet can also Less than the import of Water Tank, will be imported in Water Tank without sand liquid by pressure reduction.

The embodiment of mud settling tank in this utility model: the structure of mud settling tank and mud settling tank in above-described embodiment in the present embodiment Structure identical, therefore repeat no more.

Claims (10)

1. mud settling tank, it is characterised in that include tank body, is provided with in tank body and erects the baffle plate being fixed on bottom surface, the inner chamber of tank body It is spaced sand setting chamber and without sand chamber by barrier partitions, and at the top of baffle plate and/or be arranged over for sand setting intraluminal fluid Body overflows to, without the flow channels in sand chamber, be provided with and enter the inlet in sand setting chamber for liquid and for liquid from without sand on tank body The liquid outlet that chamber is discharged.

Mud settling tank the most according to claim 1, it is characterised in that liquid outlet is in the bottom of tank body, and at flow channels Top in liquid outlet.

Mud settling tank the most according to claim 1 and 2, it is characterised in that inlet is in the tank of the tank body above sand setting chamber On wall.

Mud settling tank the most according to claim 1 and 2, it is characterised in that be provided with on liquid outlet for controlling opening of switch Closing valve.

5. fracturing fluid recovery (backflow) device, including the Water Tank for storing fracturing outlet liquid, it is characterised in that in the import of Water Tank Connecting has mud settling tank, mud settling tank to include tank body, is provided with and erects the baffle plate being fixed on bottom surface in tank body, and the inner chamber of tank body is by baffle plate It is divided into spaced sand setting chamber and without sand chamber, and at the top of baffle plate and/or be arranged over for sand setting intracavity liquid overflow To without the flow channels in sand chamber, tank body is provided with and enters the inlet in sand setting chamber for liquid and discharge from without sand chamber for liquid Liquid outlet.

Fracturing fluid recovery (backflow) device the most according to claim 5, it is characterised in that the liquid outlet of mud settling tank is in the end of tank body Portion, and flow channels is in the top of liquid outlet, the liquid outlet of mud settling tank is in above the import of Water Tank.

Fracturing fluid recovery (backflow) device the most according to claim 6, it is characterised in that mud settling tank is in the top of Water Tank.

8. according to the fracturing fluid recovery (backflow) device described in claim 5 or 6 or 7, it is characterised in that inlet is in above sand setting chamber Tank body tank skin on.

9. according to the fracturing fluid recovery (backflow) device described in claim 5 or 6 or 7, it is characterised in that be provided with on liquid outlet for controlling The controlled valve of system switch.

10. according to the fracturing fluid recovery (backflow) device described in claim 5 or 6 or 7, it is characterised in that Water Tank has two or more, respectively The bottom of Water Tank is equipped with connected entrance, is interconnected by connecting pipe between each connected entrance.