A New Biopolymer-Free, Low Solids, High Density Reservoir Drilling Fluid

2001 ◽  
Author(s):  
Robert L. Horton ◽  
James W. Dobson ◽  
Kim O. Tresco ◽  
Dave A. Knox ◽  
Taylor C. Green ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
High Density

Design and Optimization of High-Viscosity and High-Density Drilling Fluid Separation System

2010 ◽  
Vol 34-35 ◽  
pp. 562-565
Author(s):  
Ren Bo Xu ◽  
Xiao Guang Liu ◽  
Fu Quan Tu
Keyword(s):  
Performance Optimization ◽  
Oil And Gas ◽  
Orthogonal Experiment ◽  
Drilling Fluid ◽  
High Viscosity ◽  
High Density ◽  
Separation System ◽  
Design And Optimization ◽  
Orthogonal Experiment Method ◽  
Fluid Separation

For degassion of high-viscosity and high-density drilling fluid used in ultra-high pressure oil and gas zones, a two-stage vertical separation system was established. In this system, gravity separator was used as the first separator and the second separator was centrifugal separator. Using orthogonal experiment method, we simulated flow field in this system by CFD software and analyzed the effect of operate variable and structural variable on system degassion efficiency. In accordance with the characteristics of flow fields, the performance optimization scheme was presented.

Successful Application of Unique High-Density Water-Based Drilling Fluid Used in Zhaotong Shale Gas Horizontal Wells

2015 ◽  
Author(s):  
Lili Yan ◽  
Congjun Li ◽  
Zhilei Zhang ◽  
Jianhua Wang ◽  
Xianguang Xu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Drilling Fluid ◽  
Horizontal Wells ◽  
High Density ◽  
Water Based

Drilling Fluid Development and Performance Evaluation of Deep and Ultra-Deep High-Density Saturated Brine

2012 ◽  
Vol 524-527 ◽  
pp. 1382-1388
Author(s):  
Ping Quan Wang ◽  
Yang Bai ◽  
Gang Peng ◽  
Zhi Wei Qian
Keyword(s):  
High Temperature ◽  
Drilling Fluid ◽  
High Density ◽  
Deep Drilling ◽  
Fluid System ◽  
Experimental Conditions ◽  
Performance Factors ◽  
Complex Formulation ◽  
Deep Well ◽  
Processing Optimization

Due to the high temperature , great pressure and complex lithology of super-deep well bottom, there exist such problems such as high solid concentration, multiple but inaccurate treating chemicals, complex formulation with instability of drilling fluid system, resulting in a frequent occurrence of underground complex accident and a waste of a lot of manpower and material resources. Therefore, based on the analysis of performance factors of ultra-deep drilling fluid system, the approach of regulating water based drilling fluid properties of super-deep well has been found. Moreover, through screening and processing optimization of treating chemicals of ultra-deep well by single-factor method, three sets of anti-high-density and anti-high-temperature saturated brine drilling fluid systems with few kinds of treating chemicals, concise and simplified system, including: ① saturated brine drilling fluid with anti-temperature 180 °C and density 2.40 g/cm3 ; ② saturated brine drilling fluid with anti-temperature 200 °C and density 2.40g/cm3; ③ saturated brine drilling fluid with anti-temperature 220 °C and density 2.40g/cm3 . After the the evaluation of the overall performance of these three systems under respective experimental conditions, the results show that all of these systems have such advantages as good and strong rheology, water loss building capacity, inhibition, lubricity and blocking ability, etc, which could meet the requirements of ultra-deep drilling under different circumstances.

Experimental Study of the Factors Influencing Filtrate Loss of the High-Density Brine Drilling Fluid

2011 ◽  
Vol 361-363 ◽  
pp. 461-464
Author(s):  
Ming Zhang ◽  
Tian Tai Li ◽  
Xi Feng Zhang
Keyword(s):  
Laboratory Experiments ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Field Application ◽  
High Density ◽  
Fluid Loss ◽  
Affecting Factors ◽  
Oil And Gas Fields ◽  
Filtrate Loss ◽  
Gas Fields

High density brine drilling fluid has been widely applied in the high pressure and complex oil and gas fields. Effectively controlling high density brine drilling fluid loss is an important factor for reducing the reservoir damage and keeping well stability. Base on general drilling fluid formulations，the affecting factors of filtrate loss of high density brine drilling fluid were analysed through mass laboratory experiments. The results show that the main fctor was the content of caustic soda and bentonite, secondly the density and the shape of adding product. The combination of adding product is one of effective method to control the filtration property of high density brine drilling fluid. The results will provide reliable foundation for successful field application.

Study on Erosive and Magnetic Effects of Weighting Agent in a High Density Water-Based Drilling Fluid

2014 ◽  
Author(s):  
L.L. Yan ◽  
J.H. Wang ◽  
X.G. Xu ◽  
J. Feng ◽  
H.J. Liang ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
High Density ◽  
Magnetic Effects ◽  
Water Based

scholarly journals Performance Prediction of a Turbodrill Based on the Properties of the Drilling Fluid

Machines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 76
Author(s):  
Delong Zhang ◽  
Yu Wang ◽  
Junjie Sha ◽  
Yuguang He
Keyword(s):  
High Temperature ◽  
Performance Prediction ◽  
Drilling Fluid ◽  
High Viscosity ◽  
High Density ◽  
Fluid Viscosity ◽  
Two Phase ◽  
Geometry Model ◽  
Multi Stage ◽  
Fluid Properties

High-temperature geothermal well resource exploration faces high-temperature and high-pressure environments at the bottom of the hole. The all-metal turbodrill has the advantages of high-temperature resistance and corrosion resistance and has good application prospects. Multistage hydraulic components, consisting of stators and rotors, are the key to the turbodrill. The purpose of this paper is to provide a basis for designing turbodrill blades with high-density drilling fluid under high-temperature conditions. Based on the basic equation of pseudo-fluid two-phase flow and the modified Bernoulli equation, a mathematical model for the coupling of two-phase viscous fluid flow with the turbodrill blade is established. A single-stage blade performance prediction model is proposed and extended to multi-stage blades. A Computational Fluid Dynamics (CFD) model of a 100-stage turbodrill blade channel is established, and the multi-stage blade simulation results for different fluid properties are given. The analysis confirms the influence of fluid viscosity and fluid density on the output performance of the turbodrill. The research results show that compared with the condition of clear water, the high-viscosity and high-density conditions (viscosity 16 mPa∙s, density 1.4 g/cm3) will increase the braking torque of the turbodrill by 24.2%, the peak power by 19.8%, and the pressure drop by 52.1%. The results will be beneficial to the modification of the geometry model of the blade and guide the on-site application of the turbodrill to improve drilling efficiency.

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