CN220555958U

CN220555958U - Assembled perforation fracturing wellbore

Info

Publication number: CN220555958U
Application number: CN202321570026.0U
Authority: CN
Inventors: 丁可儿; 廖兴川; 黄刘科; 谭劲; 任奕兴; 刘寒; 施钰浩
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2024-03-05
Anticipated expiration: 2033-06-20

Abstract

The application relates to the field of indoor petroleum engineering tests, in particular to an assembled perforation fracturing shaft which comprises a shaft main body, an assembled plastic perforation, bolts and a specially-made hexagonal wrench. The assembled plastic perforation and the bolt can be connected with or detached from the shaft main body, and the perforation angle and cluster spacing of the hydraulic fracturing test can be freely adjusted through the device, so that the indoor perforation test can be unfolded. The matching design can improve the accuracy of the indoor perforation test, and the early preparation and the later cleaning of the test are quicker, thereby being beneficial to improving the test efficiency.

Description

Assembled perforation fracturing wellbore

Technical Field

The application relates to the field of indoor petroleum engineering tests, in particular to an assembled perforation fracturing shaft.

Background

Hydraulic fracturing is a technique that breaks up rock formations by casting high pressure fluids into the rock mass, increasing reservoir permeability. Studies have shown that perforation fracturing is more efficient than conventional fracturing reservoir reformation and can reduce reservoir fracture pressure to some extent, and the effect of perforations of different angles and intervals on fracturing reformation effect is often not the same. Because the field construction reservoir is deeply buried, the crack expansion form is difficult to effectively observe, the engineering construction cost is high, and the physical test is often adopted for equivalent research. However, at present, corresponding test equipment is lacking at home and abroad, plastic hoses or paper tubes are commonly used for equivalent replacement, and the perforation angle and the perforation interval of the existing perforation fracturing shaft are difficult to accurately change. Therefore, when relevant physical tests are carried out, the obtained results have larger errors.

Disclosure of Invention

The utility model provides an assembled perforation fracturing shaft, which aims to solve the problem that multi-angle multi-interval cracks in a rock mass are difficult to hydraulically fracture.

The novel wellbore: the well casing comprises a well casing body, an assemblable plastic perforation, assemblable bolts, a specially-made hexagonal wrench and a foam pad. Wherein the perforation can be according to angle, interval needs dismantlement installation, and the bolt can be used to block up idle hole, and purpose-made hexagonal spanner is used for more convenient dismantlement installation bolt, and the foam pad can be used to prevent that concrete from getting into the perforation. The main body of the well bore, the plastic perforation capable of being assembled and the bolt capable of being assembled are connected with each other to form the novel assembled perforation fracturing well bore.

The novel wellbore apparatus: the outer diameter of the fixed cylinder part above the main shaft is 20mm, the height is 20mm, and the inner diameter is 6mm. The lower shaft is 160mm long, the upper end is open, the lower end is closed, the inner diameter is 6mm, and the outer diameter is 16mm. In order to ensure the stability of the shaft during the test, two cylinders with the diameter of 18mm and the height of 5mm and the interval of 10mm are additionally arranged for fixation, and the distance from the top end is 10mm. The outer diameter of the assembled perforation is 4mm, the inner diameter is 2mm, the whole length is 20mm, and the lower end is provided with threads with the height of 3 mm. The diameter of the bolt is 4mm, the length of the bolt is 5mm, the lower end of the bolt is provided with threads with the height of 3mm, a groove with the side length of 1.5mm and the depth of 2mm is arranged in the center of the top end of the bolt for convenient installation and disassembly, and the hexagonal wrench with the side length of 1.5mm and the total length of 15cm is matched.

The beneficial effects achieved by the utility model are as follows: the hydraulic fracturing test provides a pouring tool, solves the problem that multi-angle multi-interval hydraulic fracturing is difficult, and effectively solves the problems that concrete is easy to coagulate and perforation is easy to bend and narrow in the pouring process of the existing rubber paper perforation. The assembly design is carried out on the shaft, so that the rapid assembly and disassembly of the shaft perforation can be realized, and the hydraulic fracturing test is convenient for injecting liquid according to the multi-angle of requirements. The equipment disassembly and assembly process is simple and easy, and the test efficiency is improved.

The utility model has simple installation and convenient application, can easily adjust the liquid injection angle and the space required by the test, can ensure the stable included angle, is convenient for cleaning the sample after the test is finished, and effectively accelerates the test process. The device uses iron and plastic materials, is convenient to obtain materials, can ensure test accuracy, and can be widely popularized and used.

Drawings

Other features, objects, and advantages of the present utility model will become more apparent upon reading the following drawings and detailed description, in which:

FIG. 1 is a schematic illustration of a wellbore construction of an assembled perforation frac of the present utility model;

FIG. 2 is a schematic diagram of a plastic perforation structure of an assembled perforated fracturing wellbore in accordance with the present utility model;

FIG. 3 is a schematic diagram of an assembled perforated fracturing wellbore bolt structure according to the present utility model;

FIG. 4 is a schematic diagram of a main body structure of an assembled perforated fracturing wellbore according to the present utility model;

fig. 5 is a schematic structural diagram of a novel special hexagonal wrench.

As shown in fig. 1: (1) a shaft body, (2) a plastic perforation capable of being assembled, and (3) a bolt and a hexagonal wrench.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement of the purposes and the effects of the present utility model easy to understand, the present utility model is further described below with reference to the specific embodiments.

Referring to fig. 1, the present utility model provides a technical solution: a fabricated perforated frac wellbore comprises (1) a wellbore body, (2) a fabricated plastic perforation (3) a bolt (4) a hex wrench.

In this embodiment, firstly, according to the angle and the interval required by each test, the necessary holes are selected as required, the (2) assemblable plastic perforation is installed with the (1) shaft through threads, and the rest unused holes are plugged with the (3) bolts through the (4) hexagonal wrench. After the bolts are installed, the outer wall of the shaft (1) is smooth, and the subsequent test cannot be influenced. In addition, prior to sample casting, the assemblable plastic perforations are plugged (2) with foam pads to prevent concrete ingress. And (3) after the test is finished, taking out the shaft (1), and matching with a hexagonal wrench (4) to disassemble the plastic perforation (2) capable of being assembled and the bolt (3) for the next use.

The foregoing has outlined the basic principles, main features, and advantages of the present utility model. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with only one technical solution, and the description is only for convenience of understanding.

Those skilled in the art will recognize that the embodiments described herein may be combined as appropriate to form yet other embodiments.

Claims

1. A fabricated perforated frac wellbore, characterized by: the well bore main body, the assembled plastic perforation and the bolt are formed, and a special hexagonal wrench is further arranged, wherein a hole needing a casting angle on the wall of the well bore can be engaged with the assembled perforation by means of an adaptive thread, and the temporarily unused casting angle can be engaged with the hole on the wall of the well bore by means of the thread by using the hexagonal wrench, so that the complete well bore is formed.

2. The fabricated perforated frac wellbore of claim 1, wherein: the shaft, the perforation and the bolt can be easily assembled and disassembled by means of the thread structure.

3. The fabricated perforated frac wellbore of claim 2, wherein: the shaft is 160mm long, the upper end is open, the lower end is sealed, the inner diameter is 6mm, and the outer diameter is 16mm.

4. A fabricated perforated frac wellbore according to claim 3, wherein: two cylinders with diameters of 18mm and heights of 5mm and 10mm apart are additionally arranged 10mm away from the top end for fixation.

5. The fabricated perforated frac wellbore of claim 2, wherein: the outer diameter of the assembled plastic perforation is 4mm, the inner diameter is 2mm, the whole length is 20mm, and the lower end is provided with threads.

6. The assembled perforated frac wellbore of claim 1 wherein the threads at the location of the circular hole in the wellbore are the same as the threads at the lower end of the assemblable plastic perforations and bolts.