Improving the Working Environment and Drilling Economics Through Better Understanding of Oil-Based Drilling Fluid Chemistry

2000 ◽  
Vol 15 (04) ◽  
pp. 254-260 ◽  
Author(s):  
R.W. James ◽  
T. Schei ◽  
P. Navestad ◽  
T.A. Geddes ◽  
M.G. Nelson ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Working Environment ◽  
Fluid Chemistry

scholarly journals Migration Characteristics of Boring Mud in Roadway Floor Anchor Wire Hole and Test in Coal Mine

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hui Zhang ◽  
Weihan Han ◽  
Youlin Xu ◽  
Mengzhi Zhu ◽  
Zhanyang Liu ◽  
...  
Keyword(s):  
Coal Mine ◽  
Drilling Fluid ◽  
Working Environment ◽  
Hole Drilling ◽  
Bottom Plate ◽  
Drilling Depth ◽  
Anchor Cable ◽  
Discharge Operation ◽  
Reverse Circulation ◽  
Fundamental Reason

Given the difficulty in drilling the anchor holes in the roadway floor of the coal mine, the characteristics of slag movement in the process of positive and negative circulation drilling are analyzed. It is concluded that the interaction between the three zones of drilling and slag is the fundamental reason restricting the rapid drilling of the anchor cable hole in the floor, and it is proposed that the pump reverse circulation drilling can effectively prevent the formation of the three zones of drilling and slag. According to the actual situation, the relationship between drilling depth, vacuum degree of the pump, and the velocity of drilling fluid and the volume of drilling slag is obtained. The results show that the pump suction reverse circulation is feasible for the rapid drilling of the anchor hole of the floor. A set of pump suction reverse circulation drilling systems has been developed, and floor anchor wire hole drilling and slag discharge operation at the same time were realized. The field test shows that the effective drilling time of the anchor cable hole in the depth of 5.6 m can be controlled within 30 min, which solves the problem of deep hole drilling in the anchor hole of the bottom plate and purifies the working environment.

Drilling Fluid Chemistry

2018 ◽  
pp. 21-84 ◽  
Author(s):  
Caili Dai ◽  
Fulin Zhao
Keyword(s):  
Drilling Fluid ◽  
Fluid Chemistry

Effect of the psychosocial working environment on cognition and dementia - A systematic review

2013 ◽  
Vol 75 (08/09) ◽  
Author(s):  
FS Then ◽  
T Luck ◽  
M Luppa ◽  
M Thinschmidt ◽  
S Deckert ◽  
...  
Keyword(s):  
Systematic Review ◽  
Working Environment ◽  
Psychosocial Working Environment

INTERARM SYSTOLIC BLOOD PRESSURE DIFFERENCE IS ASSOCIATED WITH A HIGH PREVALENCE OF CARDIO VASCULAR DISEASES- A CROSS-SECTIONAL STUDY IN POLICE WORKER

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Somesh Raju ◽  
Rina Kumari ◽  
Sunita Tiwari ◽  
NS Verma
Keyword(s):  
Blood Pressure ◽  
Systolic Blood Pressure ◽  
Blood Sugar ◽  
Pressure Difference ◽  
Systolic Pressure ◽  
Working Environment ◽  
Vascular Events ◽  
Cross Sectional ◽  
Blood Pressure Difference ◽  
High Prevalence

Background: Interarm systolic blood pressure difference more than 10 mm of Hg is predictor of cardiovascular and metabolic risk. Despite of sufficient physical activity there is high prevalence of obesity in police personal because of stressful working environment. No studies have addressed the significance of interarm pressure difference among them. Therefore, the present study conducted to access the relation of interarm blood pressure difference with obesity in police personnel. Aims and Objective: To estimate the interarm pressure difference in police personal to see its association with their obesity. Material and Method: This cross-sectional observational study done on 245 police workers in PAC, Sitapur, India. Subjects having more than ten years of working experience were included in study. Anthropometric measurements of subject recorded by following standard protocol. Measurement of systolic pressure in both arm recorded simultaneously by mercury sphygmomanometer. Available data analyze and expressed in percentage, mean with SD and chi square test to see the significance of association. Results: According to anthropometric results of subjects 77.14 prcent subjects were having generalised obesity and 82.04 percent of subjects having abdominal obesity. 34.29 percent of subjects showed abnormally high (?10 mmHg) inter-arm systolic blood pressure difference. Both type of obesity showed positive association with blood sugar level but no association with interarm pressure difference. Conclusion: Interarm blood pressure difference is greater in individual having obesity or prolong duration of service. Such subjects are more susceptible to develop coronary artery disease or peripheral arterial disease in future. Early screening can help to detect the vascular events likely to occur in the future Keywords: Body mass index, Waist circumference, Interarm pressure difference, Random blood sugar

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