Petrobras | Date: 2016-09-19
This invention relates to a method of correcting eccentricity of ultrasonic image profiles, measured along a section of rock, including the steps of measuring emitted amplitude values (A_(0)) and measuring transit time values (t_()) of ultrasonic acoustic pulses emitted at a range of default angles (), where the amplitude measured at each angle (A_()) is determined by an amplitude decay model in relation to the transit time (t_()) defined by A _()=A_()e^(t)^(/)I_(), where is the decay correction factor; and I_() is the reflection coefficient of the rock wall.
Petrobras and Federal University of Rio de Janeiro | Date: 2016-11-09
The present invention describes a photochemical hydrogenation process for heavy fractions of hydrocarbon streams where the aromatic and polyaromatic compounds present in that fraction selectively react in the presence of an alkoxide, when subjected to electromagnetic irradiation.
Petrobras | Date: 2016-11-17
This invention offers a method to install a wear-resistant polymeric sleeve in a pipe bend stiffener with a metal inner wall, including the following steps: calculate thickness of the internal wall of the stiffener that can removed; remove the thickness of at least a portion of the calculated inner wall; and apply a polymeric material sleeve in the inner wall of the stiffener, where the polymeric material sleeve has the thickness of the inner wall removed.
Petrobras | Date: 2016-11-15
The present invention is for sealing gaskets applicable to pipes, valves and boiler equipment. In this context, the present invention provides a sealing gasket for piping systems comprising (i) a core (10) formed by a plurality of concentric metal rings (10a), each ring (10a) comprising a substantially rectangular cross-section, wherein the height of the rectangular cross-section is the same for all the rings (10a), and (ii) surface coating (12) of flexible material applied to the upper and lower surfaces of the core (10). The present invention also provides the manufacturing process of said sealing gasket. Thus, the present invention provides a sealing gasket (i) that eliminates the need for an external rigid ring, (ii) that is easy to conform for reduced-diameter sealing gaskets and (iii) can be easily formed into different shapes, such as an oval shape, which is particularly useful for sealing between the body and the gate valve bonnet.
Petrobras and Federal University of Rio de Janeiro | Date: 2016-11-17
The present invention is related to a gravitation anchor for offshore anchoring of ships and platforms, comprising a main body (10) with a longitudinal axis of revolution (11), comprising a means of stabilization (14), whereby the means of stabilization (14) comprises a means of automatic activation (140). Optionally, the means of stabilization comprises at least one stabilizer (14), whereby each stabilizer (14) comprises an end pivotally attached (141) to the gravitation anchor (1), and a free end, whereby when the stabilizer (14) is in a retracted position, the free end is positioned closer to the main body (10) of the gravitation anchor (1), and whereby when the stabilizer (14) is in an extended position, the free end is positioned away from the main body (10) of the gravitation anchor (1).
Petrobras, King Fahd University of Petroleum, Minerals and Saudi Aramco | Date: 2016-03-28
The invention relates to a four-component catalyst and a seven-component catalyst and refractory supports for use in the thermoneutral reforming of petroleum-based liquid hydrocarbon fuels.
Process For Obtaining Nanocomposites, Nanocomposite, Method Of Capture And Retrieval Of A Solubilized And/Or Disperesed Material In Organic Or Inorganic Medium, Method Of Purification Of An Organic Or Inorganic Medium And Capture And Retrieval Kit For A Solubilized And/Or Dispersed Material In Organic Or Inorganic Medium
University of Sao Paulo and Petrobras | Date: 2015-06-11
The present invention lies in the fields of chemistry and nanotechnology and describes a nanocomposite to be used in the recovery of several compounds from inorganic or organic medium. Specifically, the invention presents a nanocomposite consisting of magnetic nanoparticles composed of Fe_(3)O_(4 )associated to an activated charcoal adsorbent substrate, a process to obtain and methods of use of the nanocomposite. The present invention enables the processing, concentration and recovery of large volumes of contaminated water, regenerating magnetic adsorbent material for reuse, in a cyclic and sustainable manner, transforming dispersed/diluted pollutants in pre-concentrates that can be easily processed, helping to conserve natural resources.
Petrobras | Date: 2015-01-27
The present invention refers to a method to repair flexible flow lines used in the petroleum industry. This method provides a means for quick and permanent repairs of birdcage-type failures (BC) in flexible ducts while they are in operation, without interrupting production flows. The technology proposed, because of its simple characteristics, eliminates the need for replacing the affected section and for allocating special vessels to perform the repair.
Petrobras | Date: 2015-09-22
The present invention is a system for the extraction and quantification of tetraprotic naphthenic acids present in oils, precursors of the formation of calcium naphthenates, which are potential formers of deposits, causing of damage to pieces of equipment used in the oil production industry.
Petrobras | Date: 2015-01-07
Additives for mixing into the base catalyst inventory of the fluid catalytic cracking (FCC) process units, so as to achieve a high selectivity of light olefins (ethylene and propylene), are described. Such additives comprise an FER zeolite and an MFI zeolite, the MFI zeolite preferably being zeolite ZSM-5. The mixture of the additive in a concentration greater than 2% w/w relative to the base catalyst of an FCC unit allows greater selectivity for light olefins, propylene and ethylene, while maintaining catalytic activity.