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Given a graph F , a hypergraph is a Berge- F if it can be obtained by expanding each edge in F to a hyperedge containing it. A hypergraph H is Berge- F -saturated if H does not contain a subhypergraph that is a Berge- F , but for any edge e ∈ E ( H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d99832cf29120ce046285160908f137d
http://arxiv.org/abs/1710.03735
http://arxiv.org/abs/1710.03735
Publikováno v:
All Days.
Drilling performance and durability of polycrystalline diamond compact (PDC) bits can be degraded by the vibrations associated with drilling. In particular, two types of vibrations are of interest, torsional oscillation and backward whirl. Torsional
Autor:
Richard Yao, Tracy Li, Eric C. Sullivan, Navish Makkar, Keith Glasgow, Adam Miller, Allen Blalock, Jason R. Habernal
Publikováno v:
2012 IEEE International Instrumentation and Measurement Technology Conference Proceedings.
An accurate determination of weight and torque at the bit is essential to maximize drilling performance and to reduce overall cost. With the increase in complexity of wells for oil and gas production, efficient drilling is becoming extremely importan
Autor:
Navaratna S. Rajaram, Eric C. Sullivan
Publikováno v:
ISA Transactions. 31:115-133
The article describes ROBOEDIT, a knowledge-based programming assistant that has been developed to facilitate the modification and the fine tuning of robot programs on the production floor. In particular, ROBOEDIT is defined for use with the Advanced
Publikováno v:
All Days.
Drill bits are iteratively developed for specific applications to meet performance objectives such as aggressiveness, durability, stability, steerability, etc. The transition from one iteration to the next occurs when dull bits are examined, run data
Publikováno v:
Volume 2: Structures, Safety and Reliability; Petroleum Technology Symposium.
Drilling operations represent a major cost in discovering and exploring new petroleum reserves. Poor drilling performance, for example low ROP, can lead to high cost per foot. In order to optimize the performance of drill bits, the dynamic behavior o
Publikováno v:
All Days.
The application of a metal-bearing-seal roller-cone bit in Green Canyon, deep-water Gulf of Mexico has had a beneficial impact on drilling costs. Improvements in seal reliability (one million bit revs or 1000 krevs without seal failure are common) an