A New Type of Hydraulic Hammer Compatible with Conventional Drilling Fluids

2003 ◽  
Author(s):  
Joao Carlos R. Placido ◽  
Antonio Carlos V.M. Lage ◽  
Daltro J.L. Carvalho ◽  
Ronnie Hardie ◽  
Rasheed Wajid
Keyword(s):  
Drilling Fluids ◽  
Hydraulic Hammer ◽  
New Type ◽  
Conventional Drilling

Application of Several Kinds of Clays and a New Type of Nano-Modified Bontonite in Drilling Fluids

2013 ◽  
Vol 746 ◽  
pp. 489-495
Author(s):  
Xiong Hu Zhao ◽  
Wai Li ◽  
Shu Lian Li ◽  
Yi Hui Ji
Keyword(s):  
High Temperature ◽  
Henan Province ◽  
Hunan Province ◽  
Drilling Fluids ◽  
Filtration Property ◽  
Swelling Properties ◽  
New Type

Six kinds of materials, including two types of nanoclays, were added into drilling fluids for being substitutes of common bentonite. Swelling properties and yield of these clays were determined. Rheology, filtration property and properties at high temperature of drilling fluids prepared by the six kinds of clays respectly were also evaluated in laboratory. The results indicate that the nanobentonite modified by intercalated polymerization can improve various properties of drilling fluids. Besides, sepiolites in Xiangtan, Hunan province and in Nanyang, Henan province are also excellent materials for preparing drilling fluids.

scholarly journals A new leak-tight borehole casing at Dome Concordia station, Antarctica, for the SUBGLACIOR project

2014 ◽  
Vol 55 (68) ◽  
pp. 351-354 ◽  
Author(s):  
Romain Duphil ◽  
Philippe Possenti ◽  
Luc Piard
Keyword(s):  
Austral Summer ◽  
Summer Season ◽  
Compressed Air ◽  
New Method ◽  
Drilling Fluids ◽  
Polyethylene Pipes ◽  
New Type ◽  
New System

AbstractIn the frame of the SUBGLACIOR project, a new type of casing has been installed for testing during the 2013/14 austral summer season at Dome Concordia station, Antarctica. The SUBGLACIOR probe requires a full fluid column up to the surface, in order to circulate fluid for ice-chips recovery. This makes it essential that the casing is leak-tight through the porous firn column. We have evaluated existing solutions before opting to test a new method. This new system is made of polyethylene pipes which are welded together at the surface while the casing pipes are lowered into the reamed borehole. It is simple and lightweight and allows the casing to be installed quickly with optimum chance of being leak-tight. The installed casing has been tested both with compressed air and drilling fluids and has proven to work.

scholarly journals Environmental considerations of low-temperature drilling fluids

2014 ◽  
Vol 55 (65) ◽  
pp. 31-40 ◽  
Author(s):  
Pavel Talalay ◽  
Zhengyi Hu ◽  
Huiwen Xu ◽  
Dahui Yu ◽  
Lili Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
Occupational Safety ◽  
Drilling Fluid ◽  
Hazardous Substances ◽  
Chemical Pollution ◽  
Drilling Fluids ◽  
Biological Contamination ◽  
Subglacial Environment ◽  
Safety And Health ◽  
New Type

AbstractThe introduction of low-temperature fluid into boreholes drilled in ice sheets helps to remove drilling cuttings and to prevent borehole closure through visco-plastic deformation. Only special fluids, or mixtures of fluids, can satisfy the very strict criteria for deep drilling in cold ice. The effects of drilling fluid on the natural environment are analyzed from the following points of view: (1) occupational safety and health; (2) ozone depletion and global warming; (3) chemical pollution; and (4) biological pollution. Traditional low-temperature drilling fluids (kerosene-based fluids with density additives, ethanol and n-butyl acetate) cannot be qualified as intelligent choices from the safety, environmental and technological standpoints. This paper introduces a new type of low-temperature drilling fluid composed of synthetic ESTISOLTM esters, which are non-hazardous substances. ESTISOLTM 140 mixtures with ESTISOLTM 165 or ESTISOLTM F2887 have an acceptable density and viscosity at low temperature. To avoid the potential for biological contamination of the subglacial environment, the borehole drilling fluid should be treated carefully on the surface.

scholarly journals Investigation: Cutting Transport Mechanism in Inclined Well Section under Pulsed Drilling Fluid Action

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2141
Author(s):  
Xiaohua Zhu ◽  
Keyu Shen ◽  
Bo Li
Keyword(s):  
Drilling Fluid ◽  
Drill Pipe ◽  
Friction Torque ◽  
Drilling Fluids ◽  
Cuttings Transport ◽  
Turbulent Dissipation ◽  
Duty Cycles ◽  
Transport Velocity ◽  
Cuttings Bed ◽  
Conventional Drilling

Due to gravity, drilling cuttings are easily accumulated in an inclined well section, ultimately forming a cuttings bed, which places the drill pipe under strong friction torque. In severe cases, this can cause dragging, stuck drills, and broken drill tools. Because conventional drilling fluids are difficult to prevent the formation of cuttings in inclined well sections, a method of carrying cuttings with the pulsed drilling fluid to improve wellbore cleanness is proposed. Experiments and numerical simulations are conducted to investigate the effects of cuttings bed transport velocity, cuttings size, cuttings height, drill pipe rotation speed, cuttings bed mass, and roughness height. The optimal pulse parameters are determined per their respective impact on cuttings transport concerning varied periods, amplitudes, and duty cycles of the pulsed drilling fluid. Compared to cuttings transport under the conventional drilling fluid flow rate, the pulsed drilling fluid produces the turbulent dissipation rate, increases cuttings transport velocity, and thus improves the wellbore clearance rate.

New Generation of HTHP Water Based Drilling Fluid Changing Conventional Drilling Fluids Solutions

2020 ◽  
Author(s):  
Tariq Hasan Hamdan ◽  
Vaughn Reza Traboulay ◽  
Mohamad Husien ◽  
Salem Alblooshi ◽  
Mohamed Awadh Alhammami ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Drilling Fluids ◽  
Water Based ◽  
New Generation ◽  
Conventional Drilling

Novel Spherical Polymer Sealing Agent for Oil-Based Drilling Fluids to Overcome Borehole Instability Problem in Low Permeability Reservoirs

2020 ◽  
Vol 842 ◽  
pp. 290-296 ◽  
Author(s):  
Long Li ◽  
Rong Chao Cheng ◽  
Cha Ma ◽  
Jie Zhang
Keyword(s):  
Suspension Polymerization ◽  
Great Promise ◽  
Low Permeability ◽  
Drilling Fluids ◽  
The Core ◽  
Instability Problem ◽  
Powerful Approach ◽  
Displacement Experiments ◽  
New Type ◽  
Core Permeability

Due to borehole instability problem in low permeability formations, a new type of spherical polymer sealing agent (OLBS) for oil-based drilling fluids was prepared via suspension polymerization, and the sealing effect of polymer sealing agent on low permeability cores was evaluated. The results indicated that OLBS had no influence on the rheological properties of oil-based drilling fluids. The core displacement experiments indicated that OLBS could reduce the core permeability by a significant amount, and thus stop fluid invasion into the formations, so OLBS could provide an excellent sealing effect and improve wellbore strength. Using this polymer sealing agent to plug the low permeability formations is a very powerful approach to address borehole instability problem in troublesome low permeability formations. This sealing agent is suitable for the drilling of long sections of horizontal laterals. In the future, the oil-based drilling fluids containing OLBS might hold great promise to resolve borehole instability problem in low permeability formations.

Study on Horizontal Wells and ERW Drilling Technology of Carrying Cuttings

2012 ◽  
Vol 204-208 ◽  
pp. 397-400
Author(s):  
Cha Ma ◽  
Long Li ◽  
Yu Ping Yang
Keyword(s):  
Drilling Fluid ◽  
Horizontal Wells ◽  
Petroleum Exploration ◽  
Drilling Fluids ◽  
Fluid System ◽  
Exploration And Production ◽  
Drilling Technology ◽  
Plastic Ratio ◽  
New Type ◽  
Good Heat Resistance

Hole cleaning was very difficult in horizontal wells and extended reach wells (ERW), which was the technical bottleneck in raising the progress and success rate of petroleum exploration and production at present. A new type of treating agent for drilling fluid (CNRJ), designed for horizontal wells and extended-reach wells, was synthesized. CNRJ was added to drilling fluids, and the rheological properties, temperature-resisting property and suspension performance of drilling fluid system were analysed. The results indicate that CNRJ has good compatibility with drilling fluid system, and the dynamic plastic ratio of drilling fluid system can be adjusted from 0.20 to 1.12. In addition, the drilling fluid system has good static suspension ability for cuttings, good heat resistance and pollution resistance.

scholarly journals An Enhanced Crack-Plugging and Pressure-Bearing Oil-Based Drilling Fluid System

2020 ◽  
Vol 7 (4) ◽  
pp. 164-168
Author(s):  
Liming Dong
Keyword(s):  
Drilling Fluid ◽  
Economic Losses ◽  
Drilling Fluids ◽  
Mechanism Analysis ◽  
Prevention Measures ◽  
Filtration Loss ◽  
Before And After ◽  
Leakage Site ◽  
New Type ◽  
Fiber Materials

Compared with water-based drilling fluids (WBDF), oil-based drilling fluids (OBDF) are more prone to borehole leakage loss. Once borehole leakage occurs, it’s difficult to handle the leakage site and it will inevitably cause great economic losses. To cope with the major difficulties in OBDF leakage-proof and crack plugging, this paper conducted experiments on an enhanced crack-plugging and pressure-bearing OBDF system starting from the borehole leakage prevention measures. Then, by selecting and optimizing the materials of leakage-proof agent and crack-plugging agent for OBDF, this study prepared a new-type OBDF drilling leakage-proof agent and a new-type OBDF still crack-plugging agent and discussed their action mechanisms. Laboratory experiment and mechanism analysis results showed that, a well-proportioned combination of different type OBDF leakage-proof and crack-plugging materials such as rigid bridging particles, elastic filling particles, and fiber materials had a synergistic plugging effect and quickly formed a dense crack-plugging and pressure-bearing layer with a stable network structure (the "strong-force chain network" model), which had significantly improved the crack-plugging and pressure-bearing performance of the OBDF, and further optimized the enhanced crack-plugging and pressure-bearing OBDF system; before and after the heated rolling aging, the rheological properties and filtration loss performance of the system were good, and the filtration loss of the sand filter cake of the Permeability Plugging Apparatus (PPA) was only 11.4mL, therefore, the proposed agents exhibited good performance in drilling leakage-proof, crack-plugging, and pressure-bearing, and they were helpful to improve the pressure bearing ability of the earth stratums.

The Research on Smart Drill-In Fluid Design

2010 ◽  
Vol 146-147 ◽  
pp. 1075-1079
Author(s):  
Zhi Yong Li ◽  
Jie Nian Yan ◽  
Guang Cheng Jiang ◽  
Shui Xiang Xie ◽  
Ying Jun Fu ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Filter Cake ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Damage Control ◽  
Petroleum Engineering ◽  
Drilling Fluids ◽  
Calcium Carbonates ◽  
Active Calcium ◽  
Conventional Drilling

There are continuous high concerns on formation protection technology in international petroleum engineering field. The reservoir drill-in fluid (RDF) is the first non-native fluid to contact formation, and which influences directly the ultimate capacity of oil and gas well. The paper discusses the smart RDF design method based on conventional drilling fluid. The designed RDF system is characterized as good formation damage control, as well as the performance easily adjusted for field application. The technology combines ideal packing technology with active calcium carbonate to obtain low permeability filter cake, high return permeability and low initial flowing pressure. The sized calcium carbonates contribute to develop sealing zone for preventing filtrate and solids from invading into formation, and the organophilic passageway in filter cake (the active calcium carbonate) is favorable to open automatically passageway for oil and gas during production. Different modifiers used to ground calciumcarbonate surface modification are evaluated in laboratory. And the laboratory results show modified calcium carbonates are comfortable with conventional drilling fluids additives such as XC(Xanthan ), potassium polyacrylate(K-PAM), sodium carboxymethyl cellulose(Na-CMC).

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