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Manufacturing complex parts by the laser sintering process requires a minimum amount of energy input for consolidation of polymer particles to occur; however too much energy can result in a decline in mechanical properties. This decrease is thought to be the result of polymer chain degradation. A stable sintering region (SSR) has been proposed to describe the optimum temperature range for successful laser sintering. This article will aim to quantify the SSR for polyamide‐12 by using thermogravimetric analysis (TGA) to provide a framework for identifying key laser sintering processing parameters. Weight loss with respect to temperature is the main measurement output of the TGA procedure. However, the precise temperature and thermal history of a material is difficult to quantify during the laser sintering process; instead an energy input approach has been developed. A degradation energy was calculated from the TGA data and was used in conjunction with a laser sintering formula called energy melt ratio to prescribe build parameters for laser sintered parts. The mechanical properties of these parts illustrated the effect of degradation at various levels of energy input. Implications for this work include optimizing the material selection process for polymer laser sintering materials beyond polyamide‐12. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers
Manufacturing complex parts by the laser sintering process requires a minimum amount of energy input for consolidation of polymer particles to occur; however too much energy can result in a decline in mechanical properties. This decrease is thought to be the result of polymer chain degradation. A stable sintering region (SSR) has been proposed to describe the optimum temperature range for successful laser sintering. This article will aim to quantify the SSR for polyamide‐12 by using thermogravimetric analysis (TGA) to provide a framework for identifying key laser sintering processing parameters. Weight loss with respect to temperature is the main measurement output of the TGA procedure. However, the precise temperature and thermal history of a material is difficult to quantify during the laser sintering process; instead an energy input approach has been developed. A degradation energy was calculated from the TGA data and was used in conjunction with a laser sintering formula called energy melt ratio to prescribe build parameters for laser sintered parts. The mechanical properties of these parts illustrated the effect of degradation at various levels of energy input. Implications for this work include optimizing the material selection process for polymer laser sintering materials beyond polyamide‐12. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers
In September 2006, BP and Baker Oil Tools celebrated the installation of the world's first successful expandable monobore liner extension, an achievement that marked a major milestone for solid expandable tubular technology. A month earlier, Baker and Petrobras marked another collaborative milestone for flawless operation of an allelectric intelligent completion system in a deepwater field. Expandable metal technology and intelligent completions are among current favorite topics of trade journal editors, conference program committees and industry analysts, because each has the potential to substantially increase well value. Yet, how will these technologies be used in five years: routinely throughout the industry, or only for niche applications? Both have been commercially available for at least 10 years, yet acceptance has been slow, despite industry pressure for their development. Although applications are expanding, each technology is currently applied in a very small percentage of wells drilled. Why is technology uptake in the oil and gas industry slower than in other industries? How and why do we remain risk-averse? What role does "technology backbone" play? Why is operator-service company collaboration important, and how can we achieve it? And, what is at stake if we do not change? Introduction Numerous sources report that widespread acceptance of new technology in the oil and gas industry takes approximately 15 - 20 years, as opposed to 8 years or less in other industries. This is a disturbing statistic, not only on its face, but also in its implications. What will it take to move our industry more quickly along the path to new technology acceptance? The answer is three-fold: acceptance of reasonable risk, a stronger "technical backbone", and improved collaboration. Expandable metal technology and intelligent completions epitomize the enabling technology conundrum. They are currently favorite topics of trade journal editors, conference program committees and industry analysts, because they have the potential to substantially increase well value. Yet, how will these technologies be used in five years: routinely throughout the industry, or only for niche applications? Both have been commercially available for at least 10 years. Although applications are expanding, each technology is currently applied in a very small percentage of wells drilled. Both operators and service companies realize that failure to implement breakthrough technology could result in significant loss of economic benefits. Conversely, incorrect implementation of new technology could result in serious economic, safety or environmental risks. In many instances, operators are taking significant, positive steps by partially funding new technology development. Another positive step would be a mindset change to view new technology content as a positive metric, like insurance, rather than a project risk. For this mindset adjustment to occur, the operating company must have technological understanding and competence to ask correct questions of technology providers, understand risks and rewards of implementing technology, and be able to sell the corporation that the potential benefits are worth the risks. Collaboration can enhance understanding, competence and informed technological strategies. It can reduce risk. And, it can enable the enabling technologies our industry needs to continue to meet the growing demands of an energy-hungry world.
Abstract. The slow pace of technology acceptance is a concern for many in the oil and gas industry. A group of over 90 executives and leaders of the industry gathered in mid-March to discuss and analyze the causes and recommend steps to accelerate technology acceptance. Six issues were identified as determining factors for rate of technology acceptance in this industry. Each was discussed in depth during half-day-long breakout sessions and results are presented in companion papers by other authors[1,2,3,4,5,6] The group also had a number of summary recommendations for accelerating technology acceptance. These were: Encourage active participation of company leadership:Create technology-receptive company culturesFocus on value propositionCreate incentives and rewards for successful use of technologyIntroduce mechanisms to reduction risk for early adoptersAlign the goals of operators and service companies Increase funding and involvement of venture capital for technologyEncourage oil industry personnel to be more receptive to technologyCommunication of success stories more effectively. This paper provides the historical background of the topic and presents a list of general items recommended by the group. Discussion of each specific topic of the breakout sessions along with results and recommendations are presented in companion papers. Background In March 2004, a panel of industry leaders met to discuss the status and health of technology in the oil and gas industry. The impetus for the discussion was the incredible speed of technology infusion across industries and around the world. The leaders were asked, Is our industry keeping pace with others? In particular, the panel discussed the following topics: After a day of in-depth discussion, the panel decided to focus its attention and deliberations on the rate of acceptance of new technology, and not its development. It was argued that, through the rules of supply and demand, rapid acceptance of new technology will stimulate and promote technology development. The panel felt that the present rate of infusion of new technology was inadequate for the size, breadth and wealth of oil and gas industry and has led to "incrementalism" and "residualism", both of which represent a skeptical and hesitant technology scene. A brief summary of these deliberations was published in June 2004 issue of JPT[7]. In order to get broader industry input, the readers were asked for their views on the subject. The responses supported the views expressed in the paper.
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