Designing Drilling Muds to Combat Circulation Losses for Arctic Environments (Russian)

2013 ◽  
Author(s):  
Mesfin Belayneh ◽  
Bernt Aadnøy
Keyword(s):  
Drilling Muds

Determining the toxicity of drilling muds using the methods of biotesting, case study of Tomsk region the territory

2018 ◽  
pp. 108-111 ◽  
Author(s):  
A.A. Klimova ◽  
◽  
A.S. Mishunina ◽  
S.V. Azarova ◽  
D.E. Fominykh ◽  
...  
Keyword(s):  
Tomsk Region ◽  
Drilling Muds

Chemical Speciation of Chromium in Drilling Muds

2007 ◽  
Author(s):  
Takeyoshi Taguchi ◽  
Mitsuru Yoshii ◽  
Kohzo Shinoda
Keyword(s):  
Chemical Speciation ◽  
Drilling Muds

Influence of Drilling Muds on the Primary Chemosensory Neurons in Walking Legs of the Lobster, Homarus americanus

1981 ◽  
Vol 38 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Charles D. Derby ◽  
Jelle Atema
Keyword(s):  
Feeding Behavior ◽  
Homarus Americanus ◽  
Normal Activity ◽  
Drilling Mud ◽  
Behavioral Deficits ◽  
Chemosensory Neurons ◽  
Petroleum Fractions ◽  
Food Odors ◽  
Normal Feeding ◽  
Drilling Muds

The effects of whole drilling muds on the normal activity of walking leg chemosensory neurons of the lobster, Homarus americanus, were examined using extracellular neurophysiological recording techniques. Exposure of legs for 3–5 min to 10 mg/L drilling mud suspended in seawater altered responses to food odors of 29% of the chemoreceptors examined (data pooled for the two drilling muds tested); similar exposure to 100 mg/L drilling mud resulted in interference with 44% of all receptors studied. The effects of both of these concentrations are statistically significant, although they are not different from each other. Interference was usually manifested as a marked reduction in the number of action potentials in a response. In one preparation, the exposure to drilling mud caused a change in the temporal pattern of the spikes without affecting the total number of spikes. Other chemosensory neurons were excited by 10 mg/L drilling mud itself. However, not all chemoreceptors are inhibited by these drilling muds since responses to feeding stimuli were recorded from the legs of lobsters that had been exposed to drilling mud for 4–8 d before the neurophysiological experiments.Antennular and leg chemoreceptors are important in eliciting normal feeding behavior in lobsters. Although behavioral assays have demonstrated that feeding behavior is altered following exposure to drilling muds and petroleum fractions, there is no conclusive proof for a causal relationship between chemoreceptor interference and behavioral deficits. The two techniques complement each other as pollution detection assays, perhaps reflecting a common interference mechanism.Key words: chemoreception, drilling mud, feeding behavior, lobster, pollution, neurophysiology

scholarly journals Novel Desorber for Online Drilling Mud Gas Logging

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Marcin Lackowski ◽  
Marek Tobiszewski ◽  
Jacek Namieśnik
Keyword(s):  
Gaseous Phase ◽  
Gas Analysis ◽  
Attractive Alternative ◽  
The Novel ◽  
Recovery Efficiency ◽  
Drilling Mud ◽  
Mechanical Mixing ◽  
Analytical System ◽  
Drilling Muds ◽  
Lower Limits

This work presents the construction solution and experimental results of a novel desorber for online drilling mud gas logging. The traditional desorbers use mechanical mixing of the liquid to stimulate transfer of hydrocarbons to the gaseous phase that is further analyzed. The presented approach is based on transfer of hydrocarbons from the liquid to the gas bubbles flowing through it and further gas analysis. The desorber was checked for gas logging from four different drilling muds collected from Polish boreholes. The results of optimization studies are also presented in this study. The comparison of the novel desorber with a commercial one reveals strong advantages of the novel one. It is characterized by much better hydrocarbons recovery efficiency and allows reaching lower limits of detection of the whole analytical system. The presented desorber seems to be very attractive alternative over widely used mechanical desorbers.

Relevance of microbial extracellular polymeric substances (EPSs) - Part II: Technical aspects

2001 ◽  
Vol 43 (6) ◽  
pp. 9-16 ◽  
Author(s):  
H.-C. Flemming ◽  
J. Wingender
Keyword(s):  
Metal Ions ◽  
Extracellular Polymeric Substances ◽  
Organic Molecules ◽  
Wastewater Sludge ◽  
Resistance Change ◽  
Biotechnological Potential ◽  
Oil Drilling ◽  
Friction Resistance ◽  
Drilling Muds ◽  
Dissolution Of Minerals

Extracellular polymeric substances (EPSs) are involved in both detrimental and beneficial consequences of microbial aggregates such as biofilms, flocs and biological sludges. In biofouling, they are responsible for the increase of friction resistance, change of surface properties such as hydrophobicity, roughness, colour, etc. In biocorrosion of metals they are involved by their ability to bind metal ions. In bioweathering, they contribute by their complexing properties to the dissolution of minerals. The EPSs represent a sorption site for pollutants such as heavy metal ions and organic molecules. This can lead to a burden in wastewater sludge; on the other hand, the sorption properties can be used for water purification. Other biotechnological uses of EPS exploit their contribution to viscosity, e.g., in food, paints and oil-drilling ‘muds’; their hydrating properties are also used in cosmetics and pharmaceuticals. Furthermore, EPSs may have potential uses as biosurfactants, e.g., in tertiary oilproduction, and as biological glue. EPSs are an interesting component of all biofilm systems and still hold a large biotechnological potential.

scholarly journals A Simplified Model Applied to the Barite Sag and Fluid Flow in Drilling Muds: Simulation and Experimental Results

2017 ◽  
Vol 72 (4) ◽  
pp. 23 ◽  
Author(s):  
José Messias Ribeiro ◽  
Felipe Moreira Eler ◽  
André Leibson Martins ◽  
Cláudia Miriam Scheid ◽  
Luís Américo Calçada ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Experimental Results ◽  
Simplified Model ◽  
Drilling Muds
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