Results 31 to 40 of about 80,069 (363)

Damage Mechanism of Oil-Based Drilling Fluid Flow in Seepage Channels for Fractured Tight Sandstone Gas Reservoirs

Geofluids, 2019
Oil-based drilling fluids (OBDFs) have a strong wellbore stabilization effect, but little attention has been paid to the formation damage caused by oil-based drilling fluids based on traditional knowledge, which is a problem that must be solved prior to ...
Peng Xu, Mingbiao Xu
doaj   +1 more source

A Novel Thermo-Thickening Oil-Based Drilling Fluid Based on Composite Thickener Under High Temperature and Pressure

Energies
Under high-temperature conditions in deep well formations, oil-based drilling fluids tend to show degraded rheological properties and reduced suspension capacity, which may impair wellbore cleanliness and circulation pump pressure and hinder drilling. To
Weijie Chen, Xiaoming Tang, Leilei Wang, Hong Ma, Anliang Chen, Jian Zhang, Weian Huang, Guanzheng Zhuang, Hanyi Zhong, Xianbin Zhang   +9 more
doaj   +1 more source

Recent Advances of Graphene-Derived Nanocomposites in Water-Based Drilling Fluids

Nanomaterials, 2020
Nanocomposite materials have distinctive potential for various types of captivating usage in drilling fluids as a well-designed solution for the petroleum industry.
Rabia Ikram, Badrul Mohamed Jan, Jana Vejpravova, M. Iqbal Choudhary, Zaira Zaman Chowdhury   +4 more
doaj   +1 more source

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Fluids, 2022
This paper discusses problems associated with water-based drilling fluids used for drilling formations with abnormally high pressure. The available solutions are suitable for a narrow range of applications, especially when weighted muds should be used ...
Ekaterina Leusheva, Nazim Alikhanov, Valentin Morenov   +2 more
doaj   +1 more source

Balancing Hydraulic Fracturing’s Environmental and Economic Impacts: The Need for a Comprehensive Federal Baseline and the Provision of Local Rights [PDF]

, 2013
Reliable evaluation methods is needed to ensure that investments in energy conservation measures (ECMs) and the construction of new energy efficient buildings lives up to the promised and expected performance.
Garmezy, Adam
core   +2 more sources

Preparation and Evaluation of a Novel Branched Polymer as Thickener for Calcium Chloride-Based Drilling and Completion Fluids

Molecules
Calcium halide-based fluids are often used in drilling and completion operations due to their high density, clay inhibition and low solid content. However, there is a lack of thickeners to promote gel strength, which improves the fluid’s capacity to ...
Xianbin Zhang, Zhongfeng Yang, Qian Wang, Weijie Chen, Tengjiao Liu, Tao Zhou, Shulin Li, Tongle Xin, Jie Cao, Xia Xin   +9 more
doaj   +1 more source

A review of biolubricants in drilling fluids: recent research, performance, and applications [PDF]

, 2015
Lubricant additives are added to drilling fluids to lower the drag and torque between the drill strings and rock formation. They impart lubricating properties into two moving surfaces contacts under extreme temperature and pressure conditions. Currently,
Abdul Rashid, Suraya, Kania, Dina, Mohamad Jan, Badrul, Omar, Rozita, Yunus, Robiah   +4 more
core   +1 more source

Prediction and Visualization of Channel Characteristics for Lost Circulation of Drilling Fluid in Fractured Formations

Geofluids
Accurate characterization of the feature parameters of lost circulation channels in fractured formations is of great significance for assessing lost circulation risk and designing effective leakage prevention and plugging strategies.
Jinjun Hu, Sijia Ma, Tie Geng, Wei Zhang, Anguo Xu, Xiaodong Liu, Shuai Zhang   +6 more
doaj   +1 more source

Effect of Foot Orthoses on Midfoot Pain and the Volume of Bone Marrow Lesions in the Midfoot: A Randomized Mechanism of Action Study

Arthritis Care &Research, EarlyView.
Objective Foot orthoses are thought to improve pain by potentially modifying internal mechanical forces. To test this, we explored whether foot orthoses can modify patterns of bone marrow lesions (BMLs) in people with midfoot pain. Methods Forty‐two people were recruited with midfoot pain, and magnetic resonance imaging–confirmed midfoot BMLs ...
Jill Halstead, Anne‐Maree Keenan, Philip G. Conaghan, Dennis McGonagle, Anthony C. Redmond   +4 more
wiley   +1 more source

Preliminary test on modified clays for seawater resistant drilling fluids [PDF]

, 2015
The quality of a drilling fluid declines in salt water conditions. An engineered clay (HYPER clay) was developed for geosynthetic clay liners with enhanced resistance to aggressive conditions.
Bezuijen, Adam, D, Verastegui Flores, den Hamer, Davina, Di Emidio, Gemmina   +3 more
core