scholarly journals The Study of Optimization of Flocculation and Destabilization Technology of Waste PEM Drilling Fluid in Bohai Oilfield

2021 ◽  
Vol 9 ◽  
Author(s):  
Yang Liu ◽  
Yuchen Zhang ◽  
Tao Xie ◽  
Ming Yue ◽  
Dongsen Wang ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Influence Factor ◽  
Ph Value ◽  
Drilling Fluid ◽  
Mean Value ◽  
Factors Affecting ◽  
Clay Particles ◽  
Liquid Yield ◽  
Solid Liquid ◽  
Solid Liquid Separation

In light of the difficulty of solid-liquid separation of waste PEM drilling fluid in the Bohai oilfield, constructing an inorganic-organic flocculation system is proposed and the processing method of destabilization technology is optimized. The biggest influence factor on the flocculation process of PEM drilling fluid was determined by designing an orthogonal test. The flocculation mechanism was researched through single factor optimization, combined with zeta potential and particle size distribution test. The results showed that the most significant factors affecting the flocculation of waste PEM drilling fluid were the dosage of inorganic flocculant CaCl2 and flocculation pH value. When the dosage of inorganic flocculant CaCl2 was 1.2% (w/v), the dosage of organic flocculant SDYJ-2 was 0.05%, the flocculation pH value was 3, and the flocculation time was 5 min, the flocculation technology reached the optimization and then the liquid yield can reach 70.96%. The mechanism of flocculation and destabilization was as follows: the inorganic flocculant of CaCl2 mainly reduced the zeta potential of clay particles through electric neutralization. 1% CaCl2 could reduce the potential mean value of drilling fluid system from -38.1 mV to -32.5 mV, and then decrease the repulsion among suspensions. Through bridging curling and electric neutralization, the organic flocculant of SDYJ-2 can absorb and wrap the clay particles after flocculation destabilization to form a network spatial structure, which made clay particles aggregate into large flocs and particles. D50 can increase by 21.5 times, when the concentration of SDYJ-2 was 0.15%.

Simulation of particles screening in pulsating negative pressure shale shaker by coupling CFD and DEM

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Peng Yin ◽  
Yongjun Hou ◽  
Xianjin Wu
Keyword(s):  
Negative Pressure ◽  
Numerical Study ◽  
Drilling Fluid ◽  
Design Parameters ◽  
Liquid Separation ◽  
Content Type ◽  
New Device ◽  
Vibration Parameters ◽  
Solid Liquid ◽  
Solid Liquid Separation

PurposeThe purpose of this paper is to obtain the combination of working parameters suitable for pulsating negative pressure shale shaker through simulation, which is conducive to efficient recovery of clean drilling fluid and relatively dry cuttings.Design/methodology/approachShale shaker is still one of the main equipment in solid–solid and solid–liquid separation processes in drilling industry. This research is based on a new drilling fluids circulation treatment device, namely pulsating negative pressure shale shaker. In this work, a numerical study of particle flow and separation in the pulsating negative pressure shale shaker is carried out by coupling computational fluid dynamics/discrete element method (CFD-DEM). The effect of vibration parameters and negative pressure parameters are studied in terms of conveyance velocity and percent through screen.FindingsThe results show that, conveyance velocity of particle is mainly affected by vibration parameters, negative pressure in pulsating form can effectively prevent cuttings from sticking to the screen. Vibration parameters and pulsating airflow velocity peak have great influence on percent through screen, while vibration frequency and screen slope have influence on the time when the percent through screen reaches stability.Originality/valueIn this paper, the authors put forward a new kind of drilling waste fluid treatment equipment, and focused on the study of particle movement law. The results have important guiding significance for the selection of structural design parameters and rational use of equipment. In addition, the new device provides a new idea for solid–liquid separation method, which is one of the hot topics in current research.

Determination of the Chemical and Mineralogical Composition of Drilled Cuttings at Different Points throughout the Solids Control Process

2012 ◽  
Vol 727-728 ◽  
pp. 1677-1682 ◽  
Author(s):  
Marina Seixas Pereira ◽  
C.M.A. Panisset ◽  
T.B. Lima ◽  
Carlos Henrique Ataíde
Keyword(s):  
Drilling Fluid ◽  
Control Process ◽  
Mineralogical Composition ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
X Ray ◽  
Exploration And Production ◽  
Chemical And Mineralogical Composition ◽  
Solid Liquid ◽  
Solid Liquid Separation

In this work, we use x-ray fluorescence and x-ray diffraction methods to investigate the chemical and mineralogical composition of drilled cuttings at different points throughout the solids control process. Cuttings coated or contaminated with drilling fluid are the result of drilling. Over the past twenty years, studies have been conducted to assess the effects that these contaminated cuttings have on the environment, in both offshore and onshore scenarios. A more restrictive environmental legislation and the need to reduce drilling costs (exploration and production) has led to the optimization of solid-liquid separation. Knowledge of the chemical and mineralogical composition of drilled cuttings will assist in finding a dispersant and in determining an appropriate procedure for carrying out particle size analysis of these solids.

Study on Effectes of Different Inorganic Electrolytes on Flocculation Falling of Slurry

2011 ◽  
Vol 233-235 ◽  
pp. 877-881
Author(s):  
Deng Gao Ji ◽  
Xu Long Guo ◽  
Yang Hui Cai ◽  
Su Qin Peng ◽  
Jian Hua Lian
Keyword(s):  
Zeta Potential ◽  
Functional Groups ◽  
Image Analyzer ◽  
Surface Functional Groups ◽  
Floc Size ◽  
Coal Particles ◽  
Coal Slime ◽  
Solid Liquid ◽  
Solid Liquid Separation ◽  
Better Than

In order to strengthen the thin coal slime settlement, and improve the efficiency of solid-liquid separation, in this paper, as the research object of Wuyang coal slime, carried out the studies on the effect of flocculation and settling with different inorganic electrolytes, and using electrophoresis analyzer, image analyzer and FTIR, characterized inorganic electrolytes effect on zeta potential of coal particles, floc size and surface functional groups. The results showed that: the effect of flocculation and falling, with CaCl2 and non-ionic PAM, is better than several other inorganic electrolytes. When the amount of non-ionic PAM is 3ml, CaCl2 best dosage is 4ml, corresponding to the initial falling speed is 24.49cm/min, supernatant turbidity is 22NTU. It has certain effect to the zeta potential of coal particles, floc size and the functional groups of coal surface after adding inorganic electrolytes.

scholarly journals Construction and Application of Flocculation and Destability System of Biodrill-A Drilling Fluid in Bohai Oilfield

2021 ◽  
Vol 9 ◽  
Author(s):  
Yingwen Ma ◽  
Yuchen Zhang ◽  
Yang Liu ◽  
Ming Yue ◽  
Dongsen Wang ◽  
...  
Keyword(s):  
Ph Value ◽  
Solid Phase ◽  
Drilling Fluid ◽  
Bohai Bay ◽  
Clay Particles ◽  
Orthogonal Test Design ◽  
On Line ◽  
Fluid Separation ◽  
Flocculation Effect ◽  
Flocculation Time

To protect the marine ecological environment of Bohai Bay, the waste drilling fluid in Bohai oilfield have to be treated. In the light of the composition characteristics of Biodrill-A drilling fluid, the compounding method of the inorganic–organic flocculants was adopted to assist the flocculation and solid–fluid separation of Biodrill-A drilling fluid. Through the orthogonal test design, the main factors impacting the flocculation effect on Biodrill-A drilling fluid were found to the concentration of inorganic flocculant CaCl2 and the flocculation pH value. The optimal flocculation treatment was further obtained through single-factor optimization. Specifically, when the inorganic flocculant CaCl2 concentration was 0.9 w/v%, the organic flocculant concentration was 0.01 w/v%, the flocculation pH was 8, and the flocculation time was 7 min. Eventually, the final dewatering rate could reach 84.02%. In the optimized compound flocculants, the inorganic flocculant CaCl2 reduced the zeta potential of clay particles by electric neutralization to decrease the repulsion among particles, and the organic one could absorb and wrap the clay particles through bridging curling and electric neutralization after flocculation destabilization. Both inorganic and organic flocculants facilitated the large flocs and particles of clay particles. The field test showed that the inorganic–organic flocculants were suitable for the on-line flocculation treatment process based on centrifugal machine. The waste drilling fluid was reduced by 82%, and the water content of the separated solid phase was as low as 25.7%.

Preparation of a new inorganic–organic composite flocculant used in solid–liquid separation for waste drilling fluid

2011 ◽  
Vol 171 (1) ◽  
pp. 350-356 ◽  
Author(s):  
Jing Zou ◽  
Hong Zhu ◽  
Fanghui Wang ◽  
Haiyun Sui ◽  
Jiantao Fan
Keyword(s):  
Drilling Fluid ◽  
Liquid Separation ◽  
Solid Liquid ◽  
Solid Liquid Separation

Preparation of Steel Slag Adsorbent and its Removal Phenol Property

2011 ◽  
Vol 213 ◽  
pp. 460-464
Author(s):  
Sheng Yu Liu ◽  
Jin Gao ◽  
Yuan Yuan Xu ◽  
Cheng Wei Lu ◽  
Yi Jin Yang
Keyword(s):  
Surface Characterization ◽  
Ph Value ◽  
Steel Slag ◽  
X Ray Diffraction ◽  
X Ray ◽  
Steel Making ◽  
Adsorption Capacities ◽  
Adsorption Processes ◽  
Solid Liquid ◽  
Solid Liquid Separation

Steel slag is a industry solid waste which come from steel making factory，and is easy to solid-liquid separation, so it posses some adsorption capacities and can be used as adsorbent. Adsorption phenol onto steel slag was investigated by the oscillating adsorption experiments and the effect of different operating parameters on these adsorption processes, such as initial concentration phenol and the pH value were studied. The surface characterization were gained by SEM, X-ray diffraction, IR Spectroscopy and BET.

Factors Affecting the Separation of Ti-Al Alloy in the TiPro Process

2013 ◽  
Vol 551 ◽  
pp. 44-54
Author(s):  
Kenneth Sichone ◽  
De Liang Zhang ◽  
Stella Raynova
Keyword(s):  
Powder Particle ◽  
Composite Powder ◽  
Al Alloy ◽  
Composite Powders ◽  
Factors Affecting ◽  
Al Composite ◽  
Al2o3 Phase ◽  
The University ◽  
Solid Liquid ◽  
Solid Liquid Separation

Abstract This paper presents and discusses the factors influencing the yield of Ti-Al alloy in the TiPro process which is a process developed at the University of Waikato for producing titanium alloy powders by mechanically activating Al/TiO2 powder mixtures and subsequently preheating the resultant composite powder in order to ignite a combustion synthesis reaction and separate the liquid Ti-Al alloy by extrusion. In this study, TiO2/Al composite powders with different powder particle microstructures have been produced and used to study the effects of starting composite powder particle microstructure on the solid/liquid separation of TiAl from solid Al2O3 by extrusion. Results obtained so far indicate that maximizing the time the Ti-Al alloy phase is maintained in the liquid state after the reaction between TiO2 and Al is one of the critical factors to increase the yield of Ti-Al alloy produced through the separation of liquid Ti-Al from the solid Al2O3 phase by extruding the mixture of liquid Ti-Al and Al2O3 formed through reactions and heating.

Preparation and Characterization of Steel Slag Adsorbent

2011 ◽  
Vol 48-49 ◽  
pp. 844-847
Author(s):  
Sheng Yu Liu ◽  
Yuan Yuan Xu ◽  
Jin Gao ◽  
Cheng Wei Lu ◽  
Yi Jin Yang
Keyword(s):  
Surface Characterization ◽  
Ph Value ◽  
Steel Slag ◽  
X Ray Diffraction ◽  
Steel Making ◽  
Adsorption Capacities ◽  
Adsorption Processes ◽  
Solid Liquid ◽  
Solid Liquid Separation

Steel slag is a industry solid waste which come from steel making factory，and is easy to solid-liquid separation, so it posses some adsorption capacities and can be used as adsorbent. Adsorption phenol onto steel slag was investigated by the oscillating adsorption experiments and the effect of different operating parameters on these adsorption processes, such as initial concentration phenol and the pH value were studied. The surface characterization were gained by SEM, X-ray diffraction, IR Spectroscopy and BET.

A Novel Method to Determine the Zeta Potential of Porous Substrates by Measuring the Deflection of Two Coupled Droplets

2009 ◽  
Author(s):  
Dominik P. J. Barz ◽  
Michael J. Vogel ◽  
Paul H. Steen
Keyword(s):  
Zeta Potential ◽  
Electroosmotic Flow ◽  
Ph Value ◽  
Bistable System ◽  
Aqueous Electrolytes ◽  
Volume Distribution ◽  
Liquid Boundary ◽  
Novel Method ◽  
Solid Liquid ◽  
Porous Substrates

We developed a novel method to determine the zeta potential of porous substrates saturated with a liquid. When two droplets are connected by their internal pressure, a bistable system in terms of volume distribution is established. Switching between the stable volume distributions may be realized by electroosmosis, arising near the solid/liquid boundary within the substrate when an electric potential difference is applied. Measuring the deflection of the liquid/gas interface of the droplets gives the strength of the induced electroosmotic flow. A model relates the induced electroosmotic flow to the zeta potential resulting from the combination of substrate and liquid. Measurements of a borosilicate substrate in contact with different aqueous electrolytes are performed. The results of the measurements clarify the influence of the ionic strength and pH value on the zeta potential. The results are also used to derive a new empirical correlation, reducing the number of parameters which have to be determined.

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