Southwest Petroleum University

Sichuan University

Southwest Jiaotong University

Feng Dai

Yang Bai

Wenzhe Li

Pingya Luo

Gang Xie

Jianfeng Liu

Huining Xu

Jianliang Pei

Wenxi Fu

Jing Zhang

Lingfeng Wu

Lu Wang

Jiading Deng

Haibo Liang

Daoxiong Li

Wen Xu

Ren Wang

Guancheng Jiang

Jinsheng Sun

Jingping Liu

Yang Ju

Yi Liu

Chunping Wang

Xiaozhang Lei

Zhiwei Zhou

Yangmengdi Xu

Fei Wu

Dezhi Liu

Gang Chen

Yue Zhuo

Yufeng Wei

Kesheng Rong

Jinbing Wei

Danchao Huang

Gang Luo

Xiaoyan Zhao

Weigang Shen

Ning Ma

Jintang Wang

A nanographene, a preparation method thereof, and uses thereof are disclosed. The method of preparing the nanographene includes the steps: (1) carrying out a first reaction by contacting a raw material graphite and a first oxidizing agent with an intercalating agent to obtain a modified graphite; (2) performing a second reaction by contacting the modified graphite and an acid with a second oxidizing agent to obtain a graphene pre-product; and (3) subjecting the graphene pre-product to an air-flow exfoliation to prepare a nanographene. An oil-based drilling fluid containing the nanographene produced by the method is also disclosed.

Nanographene and preparation method and use thereof and oil-based drilling fluid

The present invention relates to the technical field of mudslide prevention and control engineering, and provides a bottom hole type mudslide blocking dam and a dam height calculation method. According to the present invention, a climbing height of the mudslide impacting a bottom hole type mudslide blocking dam can be accurately calculated, so as to guide the height design of a dam body of the bottom hole type mudslide blocking dam, thereby guaranteeing the working safety and the protection capacity of the bottom hole type mudslide blocking dam, and saving the manufacturing cost of the bottom hole type mudslide blocking dam.

Bottom hole type mudslide blocking dam and dam height calculation method

The present disclosure a leak-proof lost-circulation control water-based drilling fluid composition and preparation method and use thereof.

Leak-proof lost-circulation control water-based drilling fluid composition and preparation method and use thereof

A preparation method of a fully adaptive modified nanographene plugging type anti-collapse drilling fluid is disclosed. A modified nanographene slurry anti-collapse agent and a water-based drilling fluid containing the modified nanographene slurry anti-collapse agent are disclosed. The preparation method includes subjecting a nanographene and a mixed acid to a first contact to obtain a mixed liquid, dropwise adding potassium chlorate into the mixed liquid under the condition of ice-bath pan to carry out a modification treatment, so as to obtain a modified nanographene, and subjecting the modified nanographene to a second contact with water to prepare a modified nanographene slurry.

Preparation method of fully adaptive modified nanographene plugging type anti-collapse drilling fluid and use thereof

The present disclosure a pressure-bearing plugging agent, comprises a core, a first coating layer and a second coating layer which are sequentially coated on an outer surface of the core, wherein the core is made of a water-absorbing swellable material, the first coating layer is a paraffin layer, and the second coating layer is obtained by cementing the rigid particles with an adhesive.

Pressure-bearing plugging agent and preparation method and use thereof

A fiber silica composite microsphere for a shale stratum comprises a hollow silica sphere and fibers, and the fibers are partially coated on an outer surface of the hollow silica sphere and partially embedded into an interior of the hollow silica sphere. The hollow silica sphere has an outer diameter of 1-5 &#x3bc;m and an inner diameter of 0.8-4.7 &#x3bc;m; the fibers have a length of 5-10 &#x3bc;m and a width of 1-3 &#x3bc;m.

Fiber silica composite microsphere for shale stratum, drilling fluid and preparation method and use thereof

A triaxial high temperature and high pressure rock mechanics load test platform includes a base, a lifting seat, and an intermediate connecting seat arranged between the base and the lifting seat. A hydraulic assembly is arranged between the base and the intermediate connecting seat; the intermediate connecting seat is connected with the lifting seat by means of a group of connecting rods; the lifting seat is enclosed by a side wall and a base plate to form a receiving groove with an upward opening; and a limiting device is arranged on the side wall of the lifting seat for preventing an MTS triaxial force sensor from disengaging from a support disk.

Triaxial high temperature and high pressure rock mechanics load test platform

An adjustable fixing device for acoustic emission test sensors for rock damage testing, the device including: a fixing frame; installation bases operating to accommodate the acoustic emission test sensors, respectively; fixing assemblies operating to fix the acoustic emission test sensors in the installation bases; and installation mechanisms operating to install the installation bases on the fixing frame. The fixing frame is a rectangular frame, and at least a pair of opposite frame walls of four frame walls is provided with installation slots adapted to install the installation mechanisms. The installation slots positioned at different frame walls are in a same cross section of the rectangular frame. Each of the installation bases is a cylinder structure. The cylinder structure includes: a cavity corresponding to an outer edge of each of the acoustic emission test sensors, and a wall including a gap for leading out wires of each sensor.

Adjustable fixing device for acoustic emission test sensors for rock damage testing

A device for fixing a rock sample, the device including: a lower clamp and an upper clamp. The lower clamp includes: a lower connector connected to a bottom loading base, a lower end cap for fixing samples, a lower chain connecting the lower connector and the lower end cap, a first spiral spring, a first central position-limit mechanism, a second central position-limit mechanism, and a first hydraulic mechanism. The lower end cap includes: a first sample fixing groove and a first connecting segment. The upper clamp includes: an upper connector connected to a top loading base, an upper end cap for fixing the samples, an upper chain connecting with the upper connector and the upper end cap, a second spiral spring, a third central position-limit mechanism, fourth central position-limit mechanism, and a second hydraulic mechanism. The upper end cap includes: a second sample fixing groove and a second connecting segment.

Hydraulic and spring combination device with position-limit spring for rock sample

Growing community of inventors

Chengdu, China

Feng Dai