rotary percussive drill

Keyword(s):  





2015 ◽  
Vol 11 ◽  
pp. 89-99 ◽  
Author(s):  
S.B. Kivade ◽  
Ch. S.N. Murthy ◽  
Harsha Vardhan


2012 ◽  
Vol 233 ◽  
pp. 218-223 ◽  
Author(s):  
X. Shi ◽  
Q. Quan ◽  
De Wei Tang ◽  
S. Jiang ◽  
X. Hou ◽  
...  

China is conducting a lunar exploration mission named “Chang’e project”. The goal of the exploration mission is to obtain the drilling core without breaking the original geological information. Since the characteristics of drilling object in lunar exploration mission are different from the soil on the earth, efforts should be greatly made on special sampling methods, sampling drills and the appropriate sampling strategies. Herein, we proposed a novel drilling and coring method, in which a soft-bag is mounted in a rotary-percussive drill for lunar soil sampling. In the process of lunar soil drilling, the driving parameters of several moving units are strongly coupled. The moving units should work cooperatively in order to acquire high coring rate and low power consumption. The relationship between the coring quantity and the drilling parameters will be discussed through experiments. The research showed a clear correlation between rotary drilling torque, sample quantity and rev-feed ratio under specific lunar soil conditions.



2016 ◽  
Vol 100 ◽  
pp. 207-212 ◽  
Author(s):  
Yoseph Bar-Cohen ◽  
Kris Zacny ◽  
Mircea Badescu ◽  
Hyeong Jae Lee ◽  
Stewart Sherrit ◽  
...  

Two of the key purposes of future NASA’s solar system exploration of planetary bodies are the search for potentially preserved bio-signatures and for habitable regions. To address these objectives, a biologically inspired wireline deep rotary-percussive drill, called Auto-Gopher, has been developed. This drill employs a piezoelectric actuated percussive mechanism for generating impulsive stresses and breaking formations, and an electric motor to rotate the bit to break material and remove the cuttings. Initially, the drill was designed as percussive mechanism for sampling ice and was demonstrated in 2005 at Lake Vida, Antarctica, reaching about 2 m depth. The lessons learned suggested there is a need to augment the percussive action with bit rotation in order to maximize the penetration rate. The first generation implementation of the rotary augmentation was focused on the demonstration of this capability. In 2012, during the 3-day field test, the drill reached a 3-meter deep in gypsum. A separate mechanism was used to break and remove the cores. The average drilling power consumption was in the range of 100-150 Watts, while the rate of penetration was approximately 2.4 m/hr. Currently under development is the second-generation drill, called Auto-Gopher 2. The drill will be fully autonomous. In this paper, the capabilities that are being integrated into the Auto-Gopher-2 are described and discussed.







Sign in / Sign up

Export Citation Format

Share Document