摘要:
An impact dissipation tool for supporting a downhole tool in downhole applications. The tool includes a base and a housing. The tool also includes a carriage located within the housing and coupled to the base, the carriage being movable relative to the housing upon a predetermined impact force. A dissipator disposed inside the housing is collapsible due to the relative movement of the carriage and the housing. The collapse of the dissipator dissipates the impact force transferred to the downhole tool.
摘要:
An impact dissipation tool for supporting a downhole tool in downhole applications. The tool includes a base and a housing. The tool also includes a carriage located within the housing and coupled to the base, the carriage being movable relative to the housing upon a predetermined impact force. A dissipator disposed inside the housing is collapsible due to the relative movement of the carriage and the housing. The collapse of the dissipator dissipates the impact force transferred to the downhole tool.
摘要:
An impact dissipation tool for supporting a downhole tool in downhole applications. The tool includes a base and a housing. The tool also includes a carriage located within the housing and coupled to the base, the carriage being movable relative to the housing upon a predetermined impact force. A dissipator disposed inside the housing is collapsible due to the relative movement of the carriage and the housing. The collapse of the dissipator dissipates the impact force transferred to the downhole tool.
摘要:
Embodiments of the present invention generally relate to methods and systems for logging through a drillstring. In one embodiment, a method of logging an exposed formation includes drilling a wellbore by rotating a cutting tool disposed on an end of a drillstring and injecting drilling fluid through the drillstring; deploying a BHA through the drillstring, the BHA including a logging tool; forming a bore through the cutting tool; inserting the logging tool through the bore; longitudinally connecting the BHA to the drillstring; and logging the exposed formation using the logging tool while tripping the drillstring into or from the wellbore.
摘要:
Embodiments of the present invention generally relate to methods and systems for logging through a drillstring. In one embodiment, a method of logging an exposed formation includes drilling a wellbore by rotating a cutting tool disposed on an end of a drillstring and injecting drilling fluid through the drillstring; deploying a BHA through the drillstring, the BHA including a logging tool; forming a bore through the cutting tool; inserting the logging tool through the bore; longitudinally connecting the BHA to the drillstring; and logging the exposed formation using the logging tool while tripping the drillstring into or from the wellbore.
摘要:
Disclosed are systems and methods that permit both real-time, and off-line, measurement of weld penetration depth. Exemplary systems and methods comprise an ultrasound source, such as a pulsed Nd:Yag laser, that simultaneously generates longitudinal and shear waves that radiate adjacent one side of a weld joining two specimens. An ultrasonic sensor, such as an electro-magnetic acoustic transducer or a piezo-electric transducer, capable of detecting shear and/or longitudinal waves, is disposed on an opposite side of the weld from the source. A signal processor is coupled to the sensor that processes time of flight signals for selected longitudinal or shear waves transmitted across the weld seam. The signal processor implements an algorithm that computes the weld penetration depth from the time of flight signals.
摘要:
A method and system for synchronizing data between a network server and a mobile device is provided. An object instance may be replicated in response to a replication request received from the network server, and a notification message may be created. The notification message may be sent to the mobile device in response to a polling request received from the mobile device, and the replicated object instance may be sent to the mobile device in response to a synchronization request received from the mobile device.
摘要:
An LDD MIS FET comprises a silicide over the lightly doped regions to reduce the parasitic resistance and to prevent the depletion of the lightly-doped regions, reducing the hot carrier injection effect. By the provision of the silicide, the overall parasitic resistance can be made low. Moreover, the increase in the resistance of the lightly-doped region due to the negative charge being trapped at the interface of or in the oxide film over the lighty-doped region and the resultant degradation in the characteristic are eliminated.
摘要翻译:LDD MIS FET包括在轻掺杂区域上的硅化物以减少寄生电阻并防止轻掺杂区域的耗尽,减少热载流子注入效应。 通过提供硅化物,可以使整体寄生电阻较低。 此外,由于负电荷被捕获在光掺杂区域上的氧化物膜的界面处或在氧化膜上的轻掺杂区域的电阻的增加以及由此导致的特性降低。
摘要:
Disclosed are systems and methods that permit both real-time, and off-line, measurement of weld penetration depth. Exemplary systems and methods comprise an ultrasound source, such as a pulsed Nd:Yag laser, that simultaneously generates longitudinal and shear waves that radiate adjacent one side of a weld joining two specimens. An ultrasonic sensor, such as an electro-magnetic acoustic transducer or a piezo-electric transducer, capable of detecting shear and/or longitudinal waves, is disposed on an opposite side of the weld from the source. A signal processor is coupled to the sensor that processes time of flight signals for selected longitudinal or shear waves transmitted across the weld seam. The signal processor implements an algorithm that computes the weld penetration depth from the time of flight signals.
摘要:
Methods and apparatus for positioning a downhole tool in a wellbore extending into a subterranean formation, commencing coring operations by rotating a coring bit of the downhole tool and extending the rotating coring bit into a sidewall of the wellbore, sensing a parameter associated with the coring operations, and adjusting the coring operations based on the sensed parameter.