Jean-Claude Roussel Raymond Boulet  [c.1]

Jean-Claude Roussel Raymond Boulet  [c.17]

Jean-Claude Roussel Raymond Boulet  [c.39]

Wells may be drilled at a constant angle to the target or dropped off to a lower angle through the reservoir section. To build, maintain or drop the deviation angle stabilisers are run in the bottom hole assembly (Fig. 3.15). A change in deviation used to require a round trip to change the position of those stabilisers in the bottom hole assembly. In recent years, adjustable, hydraulically activated stabilisers have been developed. The  [c.48]

Loading is carried out through a single buoy mooring (SBM) to which the tanker can tie up and rotate around to accommodate the prevailing weather conditions. The SBM has no storage facility, but if a production facility has storage capacity sufficient to continue production while the tanker makes a round trip to off-load, then only a single tanker may be required. In some areas the SBM option has been developed to include storage facilities such as the Spar" type storage terminals used in the North Sea. Such systems may receive crude from a number of production centres and act a central loading point.  [c.274]

The classical computer tomography (CT), including the medical one, has already been demonstrated its efficiency in many practical applications. At the same time, the request of the all-round survey of the object, which is usually unattainable, makes it important to find alternative approaches with less rigid restrictions to the number of projections and accessible views for observation. In the last time, it was understood that one effective way to withstand the extreme lack of data is to introduce a priori knowledge based upon classical inverse theory (including Maximum Entropy Method (MEM)) of the solution of ill-posed problems [1-6]. As shown in [6] for objects with binary structure, the necessary number of projections to get the quality of image restoration compared to that of CT using multistep reconstruction (MSR) method did not exceed seven and eould be reduced even further.  [c.113]

This paper is structured as follows in section 2, we recall the statement of the forward problem. We remind the numerical model which relates the contrast function with the observed data. Then, we compare the measurements performed with the experimental probe with predictive data which come from the model. This comparison is used, firstly, to validate the forward problem. In section 4, the solution of the associated inverse problem is described through a Bayesian approach. We derive, in particular, an appropriate criteria which must be optimized in order to reconstruct simulated flaws. Some results of flaw reconstructions from simulated data are presented. These results confirm the capability of the inversion method. The section 5 ends with giving some tasks we have already thought of.  [c.327]

The newest model of the INTROS, MDK-21 is intended to inspect round ropes of 6.. .64 mm. in diameter as like as flat ropes up to 233 mm width and 38 mm thickness.  [c.336]

Stade, T, Rant, J., Kaling, M., Neutron Radiography(5), Proc. 5 World Conf, Berlin, June 1996, German Society for NDT, (1997) 298  [c.510]

In case of mixed systems the procedure must be varied and it would be restricted to the special film systems of interest, of course. Mixed systems would be used by inspection companies and industrial users who normally do not dispose of the equipment for measurements as mentioned above. In these cases instead of a round robin test only periodical measurements of the properties of these mixed film systems by an independent third party institution can be used for film classification and continuous surveillance.  [c.553]

Round robin tests for the harmonization of the measurements of film system parameters according to EN 584-1  [c.553]

The detection sensitivity of radiography is related among others to the properties and quality of industrial x-ray film systems. Changes of the products, variations due to different emulsions and combinations of products of different manufacturers can influence the decisive properties of film systems as classified in EN 584-1.To ensure the quality of industrial x-ray film systems a system for quality assurance open to all interested parties is proposed which is based on periodical round robin tests and quality controls of the manufacturer or an independent third party institution.  [c.555]

F.H. Dijkstra - Rant gen Technische Dienst, The Netherlands.  [c.945]

The HMT Magnetometer System is based on SQUIDs made from high-temperature superconductors and cooled with liquid nitrogen (LNj) for operation (1). Fig. 1 shows the HMT System, in this case supplemented with a turntable, on which round disks are rotated when being tested. The crane of the HMT holds the cryogenic part of the system and a part of the electronics.The cryogenic part consists of a non-magnetic fibreglass-reinforced epoxy dewar (thermos) and tliree identical SQUIDs with magnetic flux concentrators inside a balancing fixture. The SQUID magnetometers are electronically connected such that they  [c.988]

A list from experience of typical and most common inspection requirements in civil engineering in reeent years and the methods applied is given below  [c.999]

R. P. Rand, Ann. Rev. Biophys. Bioeng., 10, 277 (1981).  [c.566]

Cortisone is a hormone produced by the cortex of the adrenal glands. As with other adrenal corticoid steroids, administration of cortisone leads to an increased deposition of liver glycogen. Tt can remove features of rheumatoid arthritis, but does not check the underlying disease it is used in various diseases of the eye, and is an antiallergic and anlifibroplastic agent.  [c.113]

Knowledge of the overall aromatics content and their distribution in mono-, di-, and polynuclear aromatics in diesel fuels has become necessary because of environmentally-related problems. These components are suspected of being at least p rtly responsible for diesel engine emissions. The need exists for a reliable and easy method (these considerations exclude spectrometry and NMR) to analyze aromatics. The method accepted by a commission of the European Committee of Standardization is liquid chromatography. The fixed phase is a silica modified by NH2 groups, the eluent is normal heptane, and detection is by refractometry although this type of detector has some disadvantages described in section Figure 3.17 shows a chn matpgJ am of a diesel motor fuel. Monoaromatics are quantified by cotfiparing their response to that of an orthoxylene standard, the diaromatics to a standard of a-methylnaphthalene and the polynuclear aromatics to a phenanthrene standard. The accuracy and reproducibility obtained during inter-laboratory round-robin tests are satisfactory and mean this method may be adopted in the near future as a European standard.  [c.81]

The roughnecks work on the rig floor, adding singles, round tripping etc. The derrick man handles the pipe up in the mast. In addition to the drilling crews, drilling operations require a number of specialists for mud engineering, logging, fishing etc., not to forget maintenance crews, cooks and cleaning staff. It is not uncommon to have some 90 people on site. The operation is managed on site by a drilling engineer or toolpusher .  [c.42]

Typical analysis in the laboratory consists of sample validation, a compositional analysis of the individual and reoombined samples, measurement of oil and gas density and viscosity over a range of temperatures, and determination of the basic PVT parameters Bo, Roand B.  [c.114]

Sing r pholof.apies of single chapters n>ay be rnade for personal use as allowed l)y national copyright laws. Permission  [c.388]

Due to the fact that the area of converters is of limited dimensions, X-raying of large-size objects is usually performed sequentially by sections. In introscope a product is moved by an automatic positioning unit in a control field in accordance with developed methodics of X-raying in a start-stop mode. A selected section of a product is positioned in the field of X-raying and exposed. Using a computer one can select the most informative frame of a TV image, digitize and record in into a separate file on a computer disk and then bring it on a monitor screen. Then the process is repeated cyclically up to the end of a testing algorithm. For testing of circular welded joints of pipelines under field conditions a new automatic positioning unit has been developed that can rotate a radiation source and an X-ray TV camera, mounted axially to it, round a tube.  [c.450]

J. Rant -J. Stefan Inst.. J. Stade - BAM, Germany. M. Balasko - KFKI, Hungary. M. Kaling, FUJI, Germany  [c.505]

Rant, J. et al., Proc. 5 Ann. Mtg of European Neutron Radiography Working Group, Bologna (June 1997), ENRWG, to be published elsewhere  [c.510]

As a first step in the direction outlined here some manufacturers and BAM last year discussed the problems and the possible procedures of such a system of quality assurance. As a result of this meeting round robin tests for the harmonization of the measurements of film system parameters and a possible procedure of surveillance of the quality of film systems were proposed. Closely related to these the BAM offers to perform the classification of film systems. But as during the production of films variations of the properties of the different batches cannot be avoided, the results of measurements of films of a single batch will be restricted to this charge, while only the measurements and mean of several batches of a film type will give representative values of its properties. This fact is taken into account already in section 4 of the standard EN 584-1 which can be interpreted as a kind of continuous surveillance. In accordance with this standard a film system caimot be certified on the base of measurements of a single emulsion only.  [c.553]

A first comprehensive round robin test described in 4.1 which is open to all interested parties will be followed periodically by round robin tests in a reduced extent to ensure the further harmonisation of measurement procedures. The check of measurering equipments and procedures is an inalienable requirement for the further steps for providing the users with constant film quality. Together with sample tests performed by BAM as indicated in section 4.2 and and the production control by the manufacturer it will be possible to survey the film systems whether they meet the requirements of one of the film classes of EN 584-1.  [c.553]

At the beginning of the supervision of films systems first of all the influences of the exposure-and processing installations of the project partners on the determination of the film system parameters shall be found out and subsequently the equipments for measurement shjdl be compared one with another. This round robin test comprises in detail  [c.553]

In order to predict the acoustic field generated by a given transducer configuration, a model based on Huygens principle has been employed [17]. This assumes that each finger may be represented as a series of point sources, the field at any point on the structure being obtained by summing the components from all the sources on the transducer. One particular interest has been to design interdigital transducers (IDTs) which have all round 360" vision of the surrounding structure. Fig 5(a) shows a typical sub-transducer, designed to excite the a, mode at 1.1 MHz In 1.2 mm thick steel plate. The complete transducer would have six such subtransducers arranged in a circle with a common focus, the idea being that each sub-transducer would generate a uniformly diverging beam to interrogate the 60" sector of structure in front of it. Fig 5(b) shows the Huygens prediction of the field from the sub-transducer. To investigate the beam divergence, an angular cross section is taken along the dotted line and plotted in Fig 5(c), where a comparison with experimental measurements is also shown. The agreement is not as good as has been obtained in other cases [17], but this is thought to be due to uneven bonding of the experimental IDT. However, both the experimental and predicted results indicate that the beam is uniform over around 40" and not the required 60", hence this particular transducer configuration was not suitable for the required purpose. Further work is in progress designing integrated IDTs which have a greater degree of overlap between the fields of their constituent sub-transducers.  [c.719]

Mephisto is devoted to predict the ultrasonic scans (A,B or C-scans) for a priori knowledge of the piece and the defects within. In the present version Mephisto only deals with homogeneous isotropic materials. The piece under test can be planar, cylindrical or have a more complex geometry. The defects can be either planar (one or several facets), or volumetric (spherical voids, side drilled holes, flat or round bottom holes).  [c.737]

Zhang Hadan and Tutor Yin Chongfu, The through wave and edge wave radiated in solid medium by the energy exchanger of round thickness modes ", The Acoustics Institute of Chinese Academy of Sciences 1984.  [c.811]

We compute a first approximation to the value of the capillary constant a by means of Eq. II-IO (fl = rh). TTte ratio r/a is then obtained and the corresponding value of r/b is determined firom Eq. 11-19 or 11-20 in the present case, = 1.201 x 0.0550 = 0.660 hence, r/a = 0.0550/0.2570 = 0.2140. From Eq. 11-19, r/fc is then 0.9850. Since b is the value of and of R2 at the bottom of the meniscus, the equation -bh is exact. From the value of r/b, we obtain a first approximation to b, that is, b = 0.0550/0.9850 = 0.05584. This value of b gives a second approximation to a from = b h = 0.05584 x 1.201 = 0.06706. A second round of approximations is not needed in this case but would be carried out by computing r/a2 then from Eq. 11-19, r/b2, and  [c.15]

V. A. Parsegian, R. P. Rand, N. L. Fuller, and D. C. Rau, in Methods in Enzymol-ogy Biomembranes Part O, Volume 127, L. Packer, ed. Academic, Orlando, FL, 1986.  [c.253]

See pages that mention the term Rynite : [c.84]    [c.194]    [c.283]    [c.297]    [c.326]    [c.332]    [c.342]    [c.343]    [c.479]    [c.39]    [c.49]    [c.565]    [c.917]    [c.253]    [c.657]    [c.93]    [c.102]    [c.102]   
Plastics materials (1999) -- [ c.608 , c.694 , c.721 ]