Research on the Cement-Based Smart Lost-Circulation Control Material with Ti-Ni SMA

2010 ◽  
Vol 123-125 ◽  
pp. 1015-1018 ◽  
Author(s):  
Qi Wang ◽  
Lu Fei Tian ◽  
Peng Song ◽  
Zhen Liu
Keyword(s):  
Smart Materials ◽  
Volume Fraction ◽  
Cold Water ◽  
External Environment ◽  
Hot Water ◽  
Circulation Control ◽  
Cement Slurry ◽  
Control Material ◽  
Lost Circulation ◽  
Short Time

Different heat-treatments were carried out on the Ti-Ni shape memory alloy, alloy thread was made to straight line with the self-made alignment on 500 °C and then self-made angle training meter was used to train the alloys. Cement-based smart materials were prepared by the method of rolling agglomeration. Finally, indoor simulation experiment was carried out. The results show that the shape recovery ration becomes lower when quenching medium are hot-oil, hot-water, cold-oil and cold-water. The smart lost-circulation control material response quickly to external environment, the time from contact with external environment to the begin of distortion is less than or equal to five seconds, and to the end of distortion is less than or equal to sixty seconds.The best volume fraction for cement-based smart plugging material in cement slurry is 20%. Furthermore, the lost-circulation control material possesses the characteristics of a short time plugging and a strong pressure-bearing capability after plugging. And it improves the capacity of the ordinary cement-based smart lost-circulation control material.

Use Of Fiber Materials to Mitigate Lost Circulation During Cementing Operations in Turkmenistan

2021 ◽  
Author(s):  
Amanmammet Bugrayev ◽  
Svetlana Nafikova ◽  
Salim Taoutaou ◽  
Guvanch Gurbanov ◽  
Maksatmyrat Hanov ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Control Treatment ◽  
Cement Slurry ◽  
Lost Circulation ◽  
Innovative Materials ◽  
Primary Cementing ◽  
Fit For Purpose ◽  
Fiber Materials ◽  
Fracture Gradient ◽  
Application Requirements

Abstract Lost circulation in depleted sands during a primary cementing job is a serious problem in Turkmenistan. The uncertainty in formation pressure across these sands increases the risk of losses during drilling and cementing, which results in remedial operations and nonproductive time. The need to find a fit-for-purpose lost circulation solution becomes even more critical in an environment with narrow pore pressure-to-fracture gradient, where each cement job with losses compromises the downhole well integrity. An engineered lost circulation solution using innovative materials in the cement slurry was carefully assessed and qualified in the laboratory for each case to optimize the formulation. The lost circulation control treatment combines specialized engineered fibers with sized bridging materials to increase the effectiveness of treatment, formulated and added to the cement slurries based on the slurry solids volume fraction (SVF). Cement slurries with low SVF were treated with higher concentrations of the product and slurries with high SVF used lower concentrations. More than 50 jobs were performed with cement slurries designed at various densities and SVF up to 58% and using this advanced lost circulation material (LCM) to mitigate losses during cementing. Field experience showed positive results, where the differential pressure up to 2,800 psi was expected during cementing operation. A local database, generated based on the design and development work performed, enabled improved decision-making for selection and LCM application requirements for subsequent jobs and development of a lost circulation strategy. The mitigation plan was put in place against losses in critical sections and depleted sand formations in Turkmenistan. It assisted in meeting the cement coverage requirements on numerous occasions, improving overall the integrity of the wells and thus, was considered to be a success. This paper provides insight of this advanced LCM, its application in cement slurries, the logic behind the developed loss circulation strategy, and the high success rate of its implementation. Three case histories are presented to demonstrate the strategy and results.

Using Thixotropic Cement Slurry for Lost Circulation Control: Case History, Volga-Urals Region

2019 ◽  
Author(s):  
Aleksey Fomenkov ◽  
Ilya Pinigin ◽  
Maxim Mikliayev ◽  
Artem Fedyanin
Keyword(s):  
Case History ◽  
Circulation Control ◽  
Control Case ◽  
Cement Slurry ◽  
Lost Circulation

Experimental and numerical study on cavitation performances of a turbopump with and without an inducer

2021 ◽  
pp. 095441002110270
Author(s):  
Yanxia Fu ◽  
Jiangfeng Xie ◽  
Yang Shen ◽  
Giovanni Pace ◽  
Dario Valentini ◽  
...  
Keyword(s):  
Numerical Model ◽  
Volume Fraction ◽  
Cold Water ◽  
Numerical Study ◽  
Operating Conditions ◽  
Hot Water ◽  
Atmospheric Conditions ◽  
Internal Flows ◽  
Ansys Cfx ◽  
Constant Rate

The cavitation performances and its internal flows in a centrifugal turbopump with and without a three-bladed axial inducer have been studied both experimentally and numerically. A 3D steady numerical model has been applied to simulate the cavitating flow from the inlet to the outlet ducts of the turbopump with and without an inducer by using ANSYS CFX code. In the present work, to clarify this relationship, we conducted experiments in both cold water ( T = 20°C) and hot water ( T = 80°C) with a focus on the development of vapor volume fraction and head degradation by gradually reducing the inlet pressure from atmospheric conditions to the minimum allowable value at a constant rate of about 3 mbar/s. The measured and predicted cavitation performances of the turbopump with and without an inducer have been compared under different operating conditions and the temperature of the operating fluid.

Research on the Cement-Based Smart Lost-Circulation Control Material with Cu-Zn-Al SMA

2011 ◽  
Vol 261-263 ◽  
pp. 757-760
Author(s):  
Lu Fei Tian ◽  
Qi Wang ◽  
Peng Song ◽  
Zhen Liu
Keyword(s):  
Heat Treatment ◽  
Shape Memory Alloy ◽  
Cotton Fiber ◽  
Simulation Experiment ◽  
Treatment Temperature ◽  
Fiber Content ◽  
Circulation Control ◽  
Volume Percent ◽  
Control Material ◽  
Lost Circulation

There were different heat treatments to Cu-Zn-Al shape memory alloy. Cement-based smart lost-circulation control material was prepared by the method of rolling agglomeration. And indoor simulation experiment was carried out. The results show that the heat treatment temperature is 800°C, the quenching medium is the boiling water; the leakage is decreased with the increase of the cotton fiber content. When the cotton fiber content is 4%, the leakage is the minimum; the best volume percent of the lost-circulation control material is 20% in the grout.

DEVELOPMENT OF AN INDICATION SCHEME FOR AEROMONAS SALMONICIDA BACTERIA USING BACTERIOPHAGES

2020 ◽  
pp. 184-190
Author(s):  
N. I Molofeeva ◽  
◽  
А.I. Kaldyrkaev ◽  
А.G. Shestakov ◽  
◽  
...  
Keyword(s):  
Causative Agent ◽  
Cold Water ◽  
External Environment ◽  
Aeromonas Salmonicida ◽  
Distribution Area ◽  
The World ◽  
Water Fish ◽  
Ulyanovsk Region ◽  
Pure Cultures ◽  
Short Time

The causative agent of furunculosis Aeromonas salmonicida is widely spread around the world and usually affects many cold-water fish (trout), salmon, and less often fish from other families. Currently, there is no scheme for indicating the bacterium of the species A. salmonicida from objects of the external environment, using bacteriophages and accumulation media, which complicates the study of the distribution area of the mentioned microorganism and rapid indication of the pathogen. For this reason, the aim of the study was to develop a scheme for the indication of A. salmonicida bacteria using bacteriophages. To identify field strains of A. salmonicida, we examined 56 samples of water objects in Ulyanovsk and the Ulyanovsk region. Using the environment of accumulation of A. Sl.1 and the differential diagnostic environment A.Sl.2.7 A. salmonicida strains were isolated and typed from 56 samples. We have developed a scheme for the indication of A. salmonicida bacteria based on the modification of the phage titer increase reaction (RSF) using the accumulation medium A.Sl.1. This scheme allows detecting A. salmonicida in the amount of 103m.K./ml within 24 hours. The proposed scheme has the potential to be modified and applied to a whole range of microorganisms, sensitive and specific, allowing to detect bacteria in the substrate in a short time, in the presence of foreign microflora without isolation of pure cultures.

Lost-Circulation Control Material Yields Successful Cementing Operation and Achieves Good Zonal Isolation in Middle East Region

2018 ◽  
Author(s):  
AhmedAgha HamidZada ◽  
Adelson Jose De Barros ◽  
Ashraf El Sayed ◽  
Wael Matar ◽  
Hesham Bereikaa ◽  
...  
Keyword(s):  
Middle East ◽  
Circulation Control ◽  
Control Material ◽  
Lost Circulation ◽  
East Region ◽  
Zonal Isolation ◽  
Middle East Region

Experimental Investigation of Heat Transfer Enhancement by Using Different Number of Fins in Circular Tube

2018 ◽  
Vol 6 (3) ◽  
pp. 1-12
Author(s):  
Kamil Abdul Hussien
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Cold Water ◽  
Finned Tube ◽  
Hot Water ◽  
Copper Tube ◽  
Smooth Tube ◽  
Tube Heat Exchanger ◽  
Mass Flow Rates ◽  
Flow Heat

Abstract-The present work investigates the enhancement of heat transfer by using different number of circular fins (8, 10, 12, 16, and 20) in double tube counter flow heat exchanger experimentally. The fins are made of copper with dimensions 66 mm OD, 22 mm ID and 1 mm thickness. Each fin has three of 14 mm diameter perforations located at 120o from each to another. The fins are fixed on a straight smooth copper tube of 1 m length, 19.9 mm ID and 22.2 mm OD. The tube is inserted inside the insulated PVC tube of 100 mm ID. The cold water is pumped around the finned copper tube, inside the PVC, at mass flow rates range (0.01019 - 0.0219) kg/s. The Reynold's number of hot water ranges (640 - 1921). The experiment results are obtained using six double tube heat exchanger (1 smooth tube and the other 5 are finned one). The results, illustrated that the heat transfer coefficient proportionally with the number of fin. The results also showed that the enhancement ratio of heat transfer for finned tube is higher than for smooth tube with (9.2, 10.2, 11.1, 12.1 13.1) times for number of fins (8, 10, 12, 16 and 20) respectively.

Gelation Performance of PAM/PEI Polymer-Based Mud System for Lost Circulation Control

2021 ◽  
Author(s):  
M. Shamlooh ◽  
A. Hamza ◽  
I. Hussein ◽  
M. Nasser ◽  
S. Salehi
Keyword(s):  
Circulation Control ◽  
Lost Circulation
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