Results 91 to 100 of about 6,692 (310)

Improvement and Application of Hydraulic Jet Impactor Adapted to PDC Bit

Shiyou jixie, 2018
The current hydraulic jet impactor has problems like easy damage of the jet element, failure of the cylinder seal structure and easy looseness of the gland structure during high temperature and high pressure solid phase drilling. To address the problems,
Wang Lei, Zhang Renlong, Suo Zhongwei, Zhang Jinshuang, Xia Yicheng, Geng Haoran, Zhao Hongyu   +6 more
doaj  

Simulation of the Static Sealing Performance of Rubber Packer Cylinders in a Supercritical–CO₂ Environment

Energies
The aim of this study was to solve the problems associated with the sealing and tearing failure of rubber packer cylinders during CO2 downhole injection.
Zhenkun Zhu, Meng Cai, Lining Cui, Xingliang Song, Xiaoyu Xu, Chuanbo Cong, Haicheng Li, Qiming Gao   +7 more
doaj   +1 more source

Syrian Cylinder Seal (replica) [PDF]

This is a replica of a Syrian cylinder seal from about 3000 BCE.https://digital.kenyon.edu/arthistorystudycollection/2842/thumbnail ...

core  

A Hittite Cylinder Seal in the Yale Babylonian Collection [PDF]

, 1981
Presentation of a copper Hittite cylinder seal with a discussion of all known examples of this type of seal and sealing from the Hittite realmPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77593/1/YBC16575 ...
Beckman, Gary
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A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

Hamzatepe Kazılarından Ele Geçen Ünik Bir Silindir Mühür

Höyük
Kahramanmaraş ili, Elbistan ilçesinin 10 km kuzeybatısında yer alan Hamzatepe, Karahüyük Mahallesi’nin hemen batısında, modern evlere bitişik bir konumdadır.
Bora Uysal, Ali Çifçi
doaj   +1 more source

Sumerian Cylinder Seal (replica) [PDF]

This is a replica of a Sumerian cylinder seal from about 3000 BCE.https://digital.kenyon.edu/arthistorystudycollection/2840/thumbnail ...

core  

Self‐Seeded Nucleation of PET in a Benign Solvent Yields a High Modulus Aerogel With Ultra‐Low Thermal Conductivity

Advanced Materials, EarlyView.
A new benign solvent (1,3‐diphenylacetone) enables a simple, safe, and sustainable dissolution and gelation method to convert waste PET into low density, monolithic aerogels with high mechanical strength (E = 20 MPa) and remarkably low thermal conductivity (k = 21.9 to 28.9 mW/m·K).
Kira R. Baugh, Garrett F. Godshall, Glenn A. Spiering, Isabela Trindade Coutinho, Alejandro A. Rodriguez, Katherine J. Wood, Aiyana Gonzalez‐Arellano, Sadeq Malakooti, Stephanie L. Vivod, Robert B. Moore   +9 more
wiley   +1 more source

Numerical Investigation of the Leakage and Rotordynamic Characteristic for a Short Staggered Labyrinth Seal

MATEC Web of Conferences, 2017
Short staggered labyrinth seals are widely used in high pressure cylinder shroud seals of steam turbines. They are good at restricting the leakage flow but do not respond well to rotordynamics and often lead to turbomachine instabilities.
Zhong Minglei
doaj   +1 more source

Kassite Cylinder Cylinder Seal (replica) [PDF]

This is a resin replica of a cylinder seal from the Kassite civilization from about 500–300 BCE. The inscription is written in the Kassite language, which uses a cuneiform script.https://digital.kenyon.edu/arthistorystudycollection/2832/thumbnail ...

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