CN218759838U

CN218759838U - Pipeline anti-freezing system suitable for staged fracturing operation

Info

Publication number: CN218759838U
Application number: CN202222699335.XU
Authority: CN
Inventors: 陈国青; 刘长华; 李金昱; 高宇; 郭琪
Original assignee: Shanxi Huaxin Coal Formed Gas Exploration And Development Co ltd
Current assignee: Shanxi Huaxin Coal Formed Gas Exploration And Development Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-03-28
Anticipated expiration: 2032-10-13

Abstract

The utility model belongs to the technical field of the construction of preventing frostbite in the engineering construction, a pipeline system of preventing frostbite suitable for segmentation fracturing operation is disclosed, this pipeline system of preventing frostbite is including the fracturing power group that the fracturing blender truck and constitute by many fracturing trucks, a plurality of discharge ports of fracturing blender truck are linked together with the sunction inlet of many fracturing trucks respectively through multichannel middling pressure pipeline, a plurality of sunction inlets on the fracturing blender truck are organized through multichannel low pressure pipeline and fracturing fluid storage tank respectively, the industry salt solution storage tank is linked together, wherein fracturing fluid storage tank group comprises a plurality of storage tanks, and all be provided with the control valve on every way low pressure pipeline, the discharge port of every fracturing truck is connected with the different imports of manifold respectively through No. one multichannel high pressure pipeline, and the different exports through the manifold are linked together with the well head on the coal seam gas well respectively through No. two high pressure pipelines of multichannel. The utility model discloses use industry salt solution flushing line to need half hour can accomplish, and need not consume other extra resources.

Description

Pipeline anti-freezing system suitable for staged fracturing operation

Technical Field

The utility model belongs to the technical field of the construction of preventing frostbite in the engineering construction, concretely relates to is a pipeline system of preventing frostbite suitable for staged fracturing operation.

Background

In a conventional fracturing mode, clear water and sand in a water tank are mixed by a sand mixer truck according to a certain proportion to form water-based fracturing fluid, the fracturing fluid is supplied to the fracturing truck through a medium-pressure pipeline, the fracturing truck pressurizes the fracturing fluid, then injects high-pressure and high-displacement fracturing fluid into a well, and in the period, in order to ensure that the clear water is sufficient and the fracturing pressure is sufficient, the bottom pressure exceeds the formation pressure to form cracks, a plurality of water tanks and the fracturing truck can be equipped on site to operate simultaneously.

According to the distribution of coal beds, staged fracturing can be adopted in the fracturing process, but in the staged fracturing operation process in winter, the interval time between the end of the first stage of fracturing and the beginning of the second stage of fracturing is long, and the freezing condition of a manifold is easy to occur, so that the problem that clear water and fracturing fluid in high, medium and low pressure pipelines in a fracturing site are frozen after the staged fracturing is temporarily stopped is solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem of above-mentioned fracturing operation in winter provides an industry salt solution rinse-system, after the staged fracturing operation is temporarily ended promptly, be full of the 15% industry salt solution of preconfigured in advance in with a jar and pour into to the fracturing pipeline, the clear water and the fracturing fluid that have in the wash pipe to prevent to freeze. Based on the theoretical design, the company designs a pipeline anti-freezing system suitable for staged fracturing operation.

In order to achieve the purpose, the utility model adopts the following technical proposal: the utility model provides a pipeline anti-freezing system suitable for staged fracturing operation, is including the fracturing power unit that the fracturing blender truck and constitute by a plurality of fracturing trucks, a plurality of discharge ports of fracturing blender truck are linked together through multichannel medium voltage pipeline respectively with the sunction inlet of a plurality of fracturing trucks, a plurality of sunction inlets on the fracturing blender truck are linked together through multichannel low pressure pipeline and fracturing fluid storage tank group, industry salt solution storage tank respectively, fracturing fluid storage tank group comprises a plurality of storage tanks, and all is provided with the control valve on every way low pressure pipeline, every the discharge port of fracturing blender truck is connected with the different imports of manifold respectively through a multichannel high pressure pipeline to different exports through the manifold are linked together with the well head on the coal bed gas well respectively through No. two high pressure pipeline of multichannel.

As a further development of the above embodiment, the other outlet of the manifold communicates with the industrial brine storage tank via an evacuation line, forming an industrial brine recovery piping system.

As a further aspect of the above embodiment, a wellhead valve is provided on a wellhead connected to the wellhead injection head, and the wellhead valve is used to control injection of fracturing fluid from different second high-pressure pipelines into the coal bed methane well.

As a further aspect of the above embodiment, shut-off valves are respectively provided at all of the inlets and outlets of the manifold.

Compared with the conventional anti-freezing mode adopting the heating belt and other modes, the utility model has the advantages of it is following: the utility model discloses use the industry brine to wash the pipeline and can accomplish less than half an hour, and need not consume other extra resources, this anti-freezing system has save time, energy saving, the high advantage of security.

Drawings

Fig. 1 is a schematic diagram of a system according to an embodiment of the present invention.

In the figure: the system comprises a fracturing fluid storage tank group 1, a fracturing blender truck 2, a manifold 3, a fracturing power group 4, a coal-bed gas well 5, an industrial brine storage tank 6, a storage tank 7, a wellhead injection head 8, a control valve 9 and a fracturing truck 10.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is further explained by the following embodiments.

Referring to fig. 1, a pipeline anti-freezing system suitable for staged fracturing operation comprises a fracturing blender truck 2 and a fracturing power unit 4 consisting of a plurality of fracturing blender trucks 10, wherein a plurality of discharge ports of the fracturing blender truck 2 are respectively communicated with suction ports of the plurality of fracturing blender trucks 10 through a plurality of medium-pressure pipelines, a plurality of suction ports on the fracturing blender truck 2 are respectively communicated with a fracturing fluid storage tank set 1 and an industrial brine storage tank 6 through a plurality of low-pressure pipelines, the fracturing fluid storage tank set 1 consists of a plurality of storage tanks 7, each low-pressure pipeline is provided with a control valve 9, other outlets of a manifold 3 are respectively communicated with the industrial brine storage tank 6 through an emptying pipeline to form an industrial brine recovery pipeline system, the discharge ports of each fracturing truck 10 are respectively connected with different inlets of a manifold 3 through a plurality of first high-pressure pipelines, and are respectively communicated with a wellhead injection head 8 on a coal-bed gas well 5 through a plurality of second high-pressure pipelines, and the wellhead valves are used for controlling the coal-bed fracturing fluid to be injected into the coal-bed well from different wellhead fracturing pipelines.

In the above technical scheme, the manifold 3 is a combination formed by a plurality of pipelines, and all inlets and outlets of the manifold 3 are respectively provided with a shutoff valve.

The concrete antifreezing operation flow is as follows:

(1) The industrial brine storage tank 6 is prepared with a concentration of 15% and a volume of 10m ³ The industrial brine can ensure that liquid in a pipeline at the temperature of 20 ℃ below zero is not frozen.

(2) After the first-stage operation of the staged fracturing construction is finished, a first fracturing truck 10 is shifted to 1, the rest vehicles are shifted to neutral gear for braking, the fracturing blender truck only opens a low-pressure pipeline control valve 9 connected with an industrial brine storage tank 6, closes the low-pressure pipeline control valve 9 connected with other storage tanks 7, and extrudes fracturing fluid in a manifold 3 and an injection head into a coal-bed gas well 5 by using small displacement, so that No. two pipelines between the manifold 3 and the coal-bed gas well 5 are filled with industrial brine.

(3) And closing a wellhead valve on the wellhead injection head 8, connecting the emptying port with an emptying pipeline of the industrial brine storage tank 6, and opening a shutoff valve connected with the emptying pipeline of the manifold 3.

(4) The second fracturing truck 10 is in gear 1, the rest vehicles are in neutral gear braking, the sand mixing truck 2 only opens a low-pressure line control valve 9 connected with the industrial brine storage tank 6, closes a low-pressure pipeline control valve 9 connected with the other storage tanks 7, sucks brine with small discharge, discharges fracturing fluid in a pipeline to the industrial brine storage tank 6 through a low-pressure pipeline, a medium-pressure pipeline, the second fracturing truck 10 and a first high-pressure pipeline connected with the second fracturing truck, and then replaces the fracturing fluid with the second fracturing truck 10 and all connecting pipelines by brine.

(5) The third fracturing truck 10 is in gear 1, the rest vehicles are in neutral gear braking, the sand mixing truck 2 only opens a low-pressure line control valve 9 connected with the industrial brine storage tank 6, closes a low-pressure pipeline control valve 9 connected with the other storage tanks 7, sucks brine with small discharge, discharges the fracturing fluid in the pipeline to the industrial brine storage tank 6 through an emptying pipeline after passing through a low-pressure pipeline, a medium-pressure pipeline, the third fracturing truck 10 and a first high-pressure pipeline connected with the third fracturing truck, and replaces the third fracturing truck 10 and all connecting pipelines with brine.

(6) And the like, all pipelines connected to all fracturing trucks 10 are flushed.

(7) After the flushing is finished through the processes, all connected medium-pressure pipelines between the fracturing blender truck 2 and all fracturing trucks 10 are closed.

(8) The control valve 9 connected on the corresponding low-voltage line on the sand mixing truck 2 and the first storage tank 7 and the industrial brine storage tank 6 is opened, and the control valve 9 connected on the low-voltage line on the rest storage tanks 7 is closed, so that the industrial brine storage tank 6 is communicated with the first storage tank 7 through the sand mixing truck 2, industrial brine is sucked into the first storage tank 7 through the storage tank 6, fracturing fluid in a low-voltage pipeline is discharged into the first storage tank 7, and the low-voltage pipeline is ensured to be filled with brine.

(9) The control valves 9 connected on the corresponding low-voltage lines on the sand mixing truck 2, the second storage tank 7 and the industrial brine storage tank 6 are opened, and the control valves 9 connected on the low-voltage lines on the other storage tanks 7 are closed, so that the industrial brine storage tank 6 is communicated with the second storage tank 7 through the sand mixing truck 2, industrial brine is sucked into the second storage tank 7 through the storage tank 6, fracturing fluid in a low-voltage pipeline is discharged into the second storage tank 7, and the low-voltage pipeline is ensured to be full of brine.

(10) And the rest is analogized in turn, and the flushing and all the storage tanks 7 are connected with a low-pressure pipeline.

(11) And finishing flushing to fill the saline water into all pipelines so as to achieve the aim of preventing the pipelines from being frozen in winter.

The above shows and describes the main features and advantages of the present invention, and it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the inventive idea and design idea can be realized in other specific forms without departing from the spirit or essential characteristics of the present invention, and the protection scope disclosed in the technical solution of the present invention should be equivalent. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a pipeline system of preventing frostbite suitable for staged fracturing operation, including fracturing power unit (4) that fracturing blender truck (2) and constitute by a plurality of fracturing truck (10), its characterized in that: a plurality of discharge ports of the fracturing blender truck (2) are respectively communicated with suction inlets of a plurality of fracturing blender trucks (10) through a plurality of medium-pressure pipelines, a plurality of suction inlets on the fracturing blender truck (2) are respectively communicated with a fracturing fluid storage tank group (1) and an industrial brine storage tank (6) through a plurality of low-pressure pipelines, the fracturing fluid storage tank group (1) consists of a plurality of storage tanks (7), a control valve (9) is arranged on each low-pressure pipeline, each discharge port of the fracturing blender truck (10) is respectively connected with different inlets of a manifold (3) through a plurality of high-pressure pipelines, and different outlets of the manifold (3) are respectively communicated with a wellhead injection head (8) on a coal-bed gas well (5) through a plurality of high-pressure pipelines.

2. The anti-freeze system for pipeline suitable for staged fracturing operation as claimed in claim 1, wherein: and a wellhead valve is arranged on a wellhead connected with the wellhead injection head (8), and the wellhead valve is used for controlling fracturing fluid from different second high-pressure pipelines to be injected into the coal-bed gas well (5).

3. The anti-freeze system for pipeline suitable for staged fracturing operation as claimed in claim 1, wherein: and all inlets and outlets of the manifold (3) are respectively provided with a shutoff valve.