Effect of argon on the rate of penetration of hydrogen through kh18N10T steel during ion bombardment

1989 ◽  
Vol 67 (1) ◽  
pp. 555-557
Author(s):  
A. I. Kanaev ◽  
V. M. Sharapov ◽  
V. Kh. Alimov ◽  
A. P. Zakharov
Keyword(s):  
Ion Bombardment ◽  
Kh18n10t Steel ◽  
Rate Of Penetration

Ion Beam Mixing of Ni-Ti Bilayered Thin Films

1985 ◽  
Vol 43 ◽  
pp. 290-291
Author(s):  
A. K. Rai ◽  
R. S. Bhattacharya ◽  
M. H. Rashid
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Amorphous Alloys ◽  
Ion Beam ◽  
Ion Bombardment ◽  
High Energy ◽  
Mixing Efficiency ◽  
Ion Beam Mixing ◽  
Enhanced Diffusion ◽  
Binary Metal

Ion beam mixing has recently been found to be an effective method of producing amorphous alloys in the binary metal systems where the two original constituent metals are of different crystal structure. The mechanism of ion beam mixing are not well understood yet. Several mechanisms have been proposed to account for the observed mixing phenomena. The first mechanism is enhanced diffusion due to defects created by the incoming ions. Second is the cascade mixing mechanism for which the kinematicel collisional models exist in the literature. Third mechanism is thermal spikes. In the present work we have studied the mixing efficiency and ion beam induced amorphisation of Ni-Ti system under high energy ion bombardment and the results are compared with collisional models. We have employed plan and x-sectional veiw TEM and RBS techniques in the present work.

Photon emission during ion bombardment of KCl, KBr, KI

2007 ◽  
Vol 20 (0) ◽  
pp. 131-136
Author(s):  
І. Є. Митропольський ◽  
В. С. Буксар ◽  
С. С. Поп ◽  
І. С. Шароді
Keyword(s):  
Photon Emission ◽  
Ion Bombardment

Preliminary Results of Low Energy Sputter Yields of Boron Nitride due to Xenon Ion Bombardment (Preprint)

2008 ◽  
Author(s):  
James L. Topper ◽  
Binyamin Rubin ◽  
Cody C. Farnell ◽  
Azer P. Yalin
Keyword(s):  
Boron Nitride ◽  
Ion Bombardment ◽  
Low Energy ◽  
Preliminary Results

scholarly journals Kinematics and dynamics analysis of new rotary-percussive PDM drilling tool

2021 ◽  
pp. 146134842198915
Author(s):  
Jialin Tian ◽  
Xuehua Hu ◽  
Liming Dai ◽  
Lin Yang ◽  
Yi Yang ◽  
...  
Keyword(s):  
Drill String ◽  
Structure Design ◽  
Drilling Process ◽  
Analysis Model ◽  
Drilling Tool ◽  
Stick Slip ◽  
Rate Of Penetration ◽  
Bottom Hole ◽  
Bottom Hole Assembly ◽  
The Impact

This paper presents a new drilling tool with multidirectional and controllable vibrations for enhancing the drilling rate of penetration and reducing the wellbore friction in complex well structure. Based on the structure design, the working mechanism is analyzed in downhole conditions. Then, combined with the impact theory and the drilling process, the theoretical models including the various impact forces are established. Also, to study the downhole performance, the bottom hole assembly dynamics characteristics in new condition are discussed. Moreover, to study the influence of key parameters on the impact force, the parabolic effect of the tool and the rebound of the drill string were considered, and the kinematics and mechanical properties of the new tool under working conditions were calculated. For the importance of the roller as a vibration generator, the displacement trajectory of the roller under different rotating speed and weight on bit was compared and analyzed. The reliable and accuracy of the theoretical model were verified by comparing the calculation results and experimental test results. The results show that the new design can produce a continuous and stable periodic impact. By adjusting the design parameter matching to the working condition, the bottom hole assembly with the new tool can improve the rate of penetration and reduce the wellbore friction or drilling stick-slip with benign vibration. The analysis model can also be used for a similar method or design just by changing the relative parameters. The research and results can provide references for enhancing drilling efficiency and safe production.

A novel rate of penetration prediction model with identified condition for the complex geological drilling process

2021 ◽  
Vol 100 ◽  
pp. 30-40
Author(s):  
Yang Zhou ◽  
Xin Chen ◽  
Haibin Zhao ◽  
Min Wu ◽  
Weihua Cao ◽  
...  
Keyword(s):  
Prediction Model ◽  
Drilling Process ◽  
Rate Of Penetration
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