China University of Petroleum

Southwest Petroleum University

Cnpc Engineering Technology R&d Company Limited

China University of Petroleum (east China)

Chongqing University

Cnpc Chuanqing Drilling Engineering Company Limited

Chengdu Omax Petroleum Technology Co., Ltd

Sichuan Xinlin New Material Technology Co., Ltd.

Jinsheng Sun

Jingping Liu

Kaihe Lv

Jintang Wang

Jiafeng Jin

Yingrui Bai

Guancheng Jiang

Xianbin Huang

Yang Bai

Jian Li

Meichun Li

Xi Wang

Pingya Luo

Yan Cheng

Shenglong Shi

Shuo Zhang

Lili Yang

Yinbo He

Yang Xuan

Guojun Li

Xiaolin Pu

Jiading Deng

Yuxiu An

Xiaoxiao Ni

Ren Wang

Fan Liu

Deli Gao

Chunyao Peng

Guangchang Ma

Jing Zhang

Tengfei Dong

Gang Xie

Rongchao Cheng

Bo Liao

Yuanwei Sun

Taifeng Zhang

Xin Zhang

Kai Wang

Yong Wang

Hao Kai Zhang

Yan Zhang

Li Li Zhao

Cheng Li

Wei Ye Chen

Xiaobo Liu

Le Wang

Xianmin Zhang

Xianzhu Wu

Min Chang

Xiaohui Sun

Feng Dai

Xuwu Luo

Zhengqiang Deng

Long Li

Bin Tan

Wenzhe Li

Xing Liang

Kaixiao Cui

Lingfeng Wu

Haibo Liang

Xinliang Li

Wen Xu

Daoxiong Li

Jianguo Zhang

Chengyuan Xu

Chengwen Wang

Ruihe Wang

Xiaohu Luo

Tie Geng

Wei Zhou

Yuping Yang

Kesheng Rong

Danchao Huang

Jiansheng Luo

Daqi Fu

Wenxin Dong

Yucheng Xue

Weian Huang

Hanyi Wang

Yao Ge

Tao Han

Jingwen Xiao

Wenhao Liu

Yi Cao

Siyi Chen

Deyi Jiang

Jinyang Fan

Jianjun Chen

Changwei Chen

Qifa Ran

He Li

Jinhong Wang

Jiaqi Xu

Jingbin Yang

Mei-Chun Li

Ziyan Li

Xiaosen Shang

Fengbao Liu

Yong Li

A polycarboxylate thinner for a carbonate/bicarbonate contamination resistant water-based drilling fluid is prepared from the following raw materials in part by mass: 5 to 10 parts of acrylic acid, 1 to 5 parts of N-vinylpyrrolidone, 5 to 10 parts of sodium methallyl sulfonate, 40 to 50 parts of isopentenyl polyethylene glycol ether, 0.02 to 0.6 part of oxidizing agent, 45 to 55 parts of reducing agent, and 40 to 60 parts of water. The thinner can solve problems caused by HCOand COcontamination in a drilling fluid, such as fluid thickening, increased viscosity and shear force, and elevated fluid loss. When applied to the drilling fluid contaminated with HCOand CO, the thinner can effectively reduce viscosity, shear force, and fluid loss of the drilling fluid.

Polycarboxylate thinner for carbonate/bicarbonate contamination resistant water-based drilling fluid and preparation method and application thereof

The present disclosure relates to the technical field of well drilling, and discloses a strongly adsorbed hyper-branched filtrate reducer for water-based drilling fluid with resistance to 240° C. and saturated salinity, a preparation method therefor and use thereof. The filtrate reducer includes a first structural unit provided by an anionic hydration-enhancing monomer, a second structural unit provided by a cationic adsorption monomer, a third structural unit provided by a main chain monomer, a fourth structural unit provided by a cyclic monomer, a fifth structural unit provided by a polyether monomer, and a sixth structural unit provided by a hyper-branched structural monomer. The filtrate reducer of the present disclosure is capable of maintaining desirable rheology and filtrate reduction performance of the drilling fluid, and the long-term stability under the conditions of 240° C. and saturated salinity.

Strongly adsorbed hyper-branched filtrate reducer for water-based drilling fluid with resistance to 240° C. and saturated salinity, preparation method therefor and use thereof

A phase change microcapsule for drilling fluid cooling and its preparation method and application, belonging to the field of oilfield chemistry technology; the preparation method of the phase change microcapsule of the invention includes the steps as follows: the core materials of NaNOand KNOare dried, heated, melted, cooled and ground to obtain a phase change material mixture; added emulsifier into the linseed oil, then heated and stirred to obtain the oil phase; the phase change material mixture were added into the suspension of cellulose nanofibers (CNFs), then stirred followed by adding ammonium hydroxide to obtain the water phase; mixed the water phase with the oil phase, heated and stirred to form water-in-oil (W/O) emulsion; then added shell prepolymer material (tetraethyl silicate) into the emulsion, after centrifugation, washing and drying, the phase change microcapsule for cooling drilling fluid was obtained.

Phase change microcapsule for drilling fluid cooling and its preparation method and application

The present disclosure relates to the technical field of drilling fluid, and discloses a high density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts, a preparation method therefor and use thereof. The water-based drilling fluid comprises a micro-crosslinked heterocyclic polymer filtrate reducer, a hyper-branched strongly adsorbed filtrate reducer, a nanometer intercalated complex shearing potentiator, a flexible outer and rigid inner microsphere plugging agent, and water, wherein the micro-crosslinked heterocyclic polymer filtrate reducer is prepared by reacting sodium p-styrene sulfonate, N,N,N-trimethyl-3-(2-methylallylamino)-1-propyl ammonium chloride, N,N-diethyl acrylamide, N-vinyl caprolactam, tetramethyl ethylenediamine with phenyl triethoxy silane. The high density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts of the present disclosure can exhibit good performance at high temperature and high salinity conditions, and has desirable weighting capability, it can meet the requirements of drilling well in the deep oil and gas formations.

High density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts, preparation method therefor and use thereof

A high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid, and preparation and application thereof are provided, belonging to the technical field of oilfield chemistry. The preparation method includes the steps of: mixing tetraethyl orthosilicate (TEOS), diethanolamine (DEA), and triethanolamine (TEA) for a transesterification and polycondensation reaction to obtain highly reactive hyperbranched polysiloxane; adding an acrylamide (AM) monomer, an anionic monomer, and a polar ester monomer into deionized water to obtain a monomer solution; adjusting the pH of the monomer solution to 5-9, and then adding highly reactive hyperbranched polysiloxane; introducing nitrogen to remove oxygen, adding an initiator, and thermally initiating a polymerization reaction; and after the reaction is completed, vacuum-drying and crushing an obtained product to obtain the high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid.

High-temperature and high-salt resistant hyperbranched lubricant for water-based drilling fluid, and preparation and application thereof

A resin slurry for a fractured-vuggy formation and the preparation and use thereof, which belong to the field of drilling fluid lost circulation control. The resin slurry plugging system is composed of the following raw materials in mass percentage: 20%-40% of composite resin plugging agent, 0.5%-5.0% of consolidating agent, 0.5%-5.0% of flow pattern regulator, 0.3%-1.2% of cross-linking agent, 0.3%-1.2% of retarder, 3%-12% of filling agent, and the balance of water. The plugging system has a certain fluidity under low-temperature conditions, is easy to be injected into the formation, and can fill a lose channel of a fractured-vuggy reservoir. The consolidating time of the plugging system is controllable, and the construction conditions are safe. The plugging system forms a three-dimensional cross-linked network structure consolidation after cross-linking and consolidating under high-temperature conditions of the formation.

Resin slurry plugging system suitable for fractured-vuggy formation and preparation and use thereof

Disclosed is a bio-enzyme degradable temporary plugging material and a preparation method and application thereof in the technical field of natural gas hydrate drilling and production; the preparation method of the bio-enzyme degradable temporary plugging material includes the following steps: mixing the ceramsite with an aqueous solution of 3-aminopropyl trimethoxysilane before a stirring reaction and drying to obtain modified ceramsite; and fully dispersing the modified ceramsite, ethyl cellulose, and epoxy resin in dichloromethane to obtain an oil phase; adding the oil phase into a gelatin aqueous solution and mixing uniformly; after a stirring reaction, evaporating an organic solvent, filtering, washing, and drying, to obtain the bio-enzyme degradable temporary plugging material.

Bio-enzyme degradable temporary plugging material and preparation method and application thereof

An oil-soluble thermosensitive resin lost circulation material for protecting a reservoir includes the following raw materials in parts by weight: 40-60 parts of resin matrix, 15-40 parts of modified asphalt, 5-12 parts of viscosity modifier, 2-5 parts of cross-linking agent, 6-15 parts of softening point modifier, and 1-3 parts of dispersant; it further provides a method for preparing the resin lost circulation material; the resin lost circulation material can melt and adhere in different temperature ranges, rapid plugging is realized, and the plugging time is long; the oil-soluble thermosensitive resin lost circulation material can be dissolved by oil flow during oil well production, so that the reservoir permeability is recovered, so as to achieve the purpose of protecting the hydrocarbon reservoir.

Oil-soluble thermosensitive resin lost circulation material for protecting a reservoir as well as preparation method and application thereof

A high temperature and high salinity-resistant complementarily rigid-flexible plugging agent, a method for preparing the same, and a water-based drilling fluid and a use thereof.

High temperature and high salinity-resistant complementarily rigid-flexible plugging agent and method for preparing the same and water-based drilling fluid and use thereof

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

A nano-organosilicon film-forming and hydrophobic shale surface hydration inhibitor is obtained by performing hydrophobic modification for nano-particles through long-chain organosilicon together with a surface-active agent. A preparation method of the said hydrophobic shale surface hydration inhibitor comprises steps as follows: nano-particles are added to the solvent under stirring conditions, and then an ultrasonic dispersion is performed; upon the end of the ultrasonic dispersion, the reaction system is adjusted to a pH of 9-11 to obtain mixed solution A; a long-chain organosilicon solution is then dropwise added to the mixed solution A for reaction under stirring conditions to obtain mixed solution B; a surface-active agent is added to the mixed solution B for reaction under stirring conditions; upon the reaction is finished, part of the solvent is removed to obtain the inhibitor.

Nano-organosilicon film-forming and hydrophobic shale surface hydration inhibitor and its preparation method and application

The present invention relates to the field of petroleum industry phase oilfield chemistry, and specifically relates to a bionic and dual-phobic drilling fluid. The drilling fluid contains a bionic wall-fixing agent, a bionic lubricant, a super dual-phobic agent, a scrap-carrying agent and a bionic shale inhibitor. The present invention uses the theory of bionics and the theory of a downhole rock surface being double phobic as a basis. By means of using the bionic wall-fixing agent, the bionic lubricant, the super dual-phobic agent, the scrap-carrying agent and the bionic shale inhibitor, which have special properties of imitating animals and plants in nature, and using a series of bionic treatment agents, a set of bionic and dual-phobic drilling fluid systems, which corresponds to an unconventional, complex oil and gas well, is formed.

Bionic and dual-phobic high-performance water-based drilling fluid

The present application discloses a nanometer self-locking bentonite film-forming agent, a method for preparing the same, and a film-forming drilling fluid.

Nanometer self-locking bentonite film-forming agent, method for preparing the same, and film-forming drilling fluid

The present disclosure to a cementitious plugging wall solidifier for water-based drilling fluid and a preparation method thereof and a water-based drilling fluid.

Cementitious plugging wall solidifer for water-based drilling fluid, and a preparation method thereof and a water-based drilling fluid

The present discloses a water-based gel-consolidation type lost circulation material system suitable for fractured lost circulation formation, preparation method and use thereof.

Water-based gel-consolidation type lost circulation material system suitable for fractured lost circulation formation, preparation method and use thereof

Growing community of inventors

Qingdao, China

Jinsheng Sun