Showing papers by "Cabot Corporation published in 1973"

Drill rig apparatus

Abstract: There is disclosed herein a mobile well drilling rig apparatus adapted for rapid assembly and disassembly thereof. The drilling rigs of the invention comprise a trailerable telescoping mast assembly and a separate sectionable substructure assembly therefor comprising a rig base, a working floor mounted in spaced relation above the base and a rig base extension extending outwardly from the drawworks side of the rig base. In a preferred embodiment, rail means defining a mastway are provided between the erected working floor and the rig base extension. The base mast section of the telescoping mast assembly is provided with cooperative mast roller means whereby the base of the mast structure is readily conveyed to the working floor and whereby the drawworks side mast legs are engaged into a trunnion arrangement therefor. Means are also provided for raising of the mast structure to the vertical from the drawworks side of the rig.

Elastic Modulus of Vulcanizates as Related to Carbon Black Structure

Abstract: The elastic modulus Gf′ of filled SBR vulcanizates has been measured as a function of strain amplitude A. At low loadings of carbon black (20 phr), where Gf′ is practically independent of ...

Powder metallurgy production of high performance alloys

Abstract: 1. THE PROCESS OF MAKING A COHERENT GREEN COMPACT WHICH HODS ITS SHAPED DURING SINTERING FROM PRE-ALLOYED COMMINUTED POWDER OF A HIGH PERFORMANCE METAL ALLOY WHICH CANNOT BE PRESSURE COMPACTED UNDER PRESSURES UP TO 70 TONS PER SQUARE INCH UNLESS ITS AVERAGE PARTICLE SIZE IS NOT GREATER THAN ABOUT 5 MICRONS, COMPRISING PROCESSING THE ALLOY POWDER TO AN AVERAGE PARTICLE SIZE BETWEEN ABOUT 9 AND ABOUT 30 MICRONS, MIXING THE ALLOY POWDER WITH A DRY, FINELY DIVIDED ORGANIC BINDER IN AMOUNTS NOT GREATER THAN ABOUT 5% BY WEIGHT OF THE ALLOY POWDER SO AS TO OBTAIN A UNIFORM DISPERSION OF BINDER IN THE ALLOY POWDER, THEN ADDING A SOLVENT FOR THE BINDER IN AMOUNT SUFFICIENT TO FORM A PLASTIC MIXTURE WITH THE ALLOY POWDER AND BINDER, THEN CONSOLIDATING THE PLASTIC MIXTURE TO A BULK DENSITY INTERMEDIATE THAT OF THE POWDER AND THAT OF THE CAST ALLOY, THEN DRYING THE CONSOLIDATED MIXTURE TO EVAPORATE THE SOLVENT, THEN CRUSHING THE CONSOLIDATED MIXTURE TO DISCRETE AGGLOMERATES OF PRE-ALLOYED POWDER PARTICLES TO PROVIDES A SUBSTANTIAL FRACTION OF -100 MESH PARTICLES AT LEAST ABOUT HALF OF THE -100 MESH FRACTION OF WHICH ARE-325 MESH, THEN FILLING A DIE OF THE DESIRED SHAPED WITH THOSE AGGLOMERATES, THEN COMPACTING THE AGGLOMERATES IN THE DIE UNDER PRESSURE TO AT LEAST ABOUT 50% OF THE CAST DENSITY OF THE ALLOY SO AS TO PRODUCE A COHERENT GREEN COMPACT, AND THEN REMOVING THE COMPACT FROM THE DIE.

Precipitated silica reinforcing agents and rubber compositions containing same

Abstract: Improved reinforced rubber compositions are provided by dispersion into a vulcanizable rubber of dehydrated precipitated silicas in combination with polyethylenimine.

The thermodynamic behavior of sulfur in molten nickel and nickel-base alloys

Abstract: The thermodynamic properties of dilute solutions of sulfur in pure liquid nickel were investigated at 1500, 1550, and 1575°C for sulfur concentrations up to 0.7 wt pct. Based on the infinitely dilute, wt pct standard state, the equilibrium data obtained for the reaction: H2(g) + S = H2S(g) were fitted by the equations: logK = − 1489/T − 1.772, and ΔG° = 6812 + 8.11T, cal/mole. For the solution ofS2(g) in pure Ni according to the reaction: 1/2S2(g) = S (in Ni), the standard free energy of solution is found to be: ΔG° = - 28,342 + 3.62T, cal/mole. For the very dilute solutions of sulfur normally encountered in nickel-base melting, the activity coefficient of sulfur in pure Ni at 1575°C is given by: log fS= -0.035 (pct S). The effects of alloying elements normally used in nickel-base alloys on the activity coefficient of sulfur in molten nickel were investigated. The activity coefficient of sulfur is increased by all of the alloying elements studied, as evidenced by the interaction parameters: eSfe = +0.005, eSCr = +0.030, eSMo = +0.053, eSTi = +0.160, and eSA1 = +0.133. Measured values of the activity coefficient of sulfur in the quaternary system Ni-S-Cr-Fe agreed reasonably well with those predicted from binary and ternary data.

Wear-resistant power metallurgy nickel-base alloy

Abstract: A wear- and abrasion-resistant article of sintered metal powder consists of chromium from about 23 percent to about 29 percent, tungsten from about 8 percent to about 15 percent, cobalt from about 8 percent to about 15 percent, molybdenum from about 8 percent to about 15 percent, carbon from about 1.65 percent to about 5 percent, boron up to about 1 percent, manganese up to about 1.3 percent, silicon up to about 1.3 percent, iron from about 10 percent to about 17.5 percent, and the balance nickel in amount at least about 20 percent and incidental impurities.

New Ni--Cr--Mo alloy demonstrates high-temperature structural stability with resultant increases in corrosion resistance and mechanical properties

Abstract: Results of a program are preserted to develop quantitative information on the effect of both intermetallic and carbon precipitation on the corrosion resistance of Ni-- Cr-Mo alloys in oxidizing and reducing environments. This program has resulted in an improved third generation alloy, Hastelloy Developmental alloy C-4, which achieves stability with respect to precipitatlon of the carbide and intermetallic phases. (GE)

Carbon Black Reinforced Compositions

Abstract: This disclosure relates to the use of a certain class of carbon black pigments as reinforcing agents in the preparation of rubber compositions having improved properties.

Carbon black reinforced rubber compositions

Abstract: THIS DISCLOSURE RELATES TO THE USE OF A CERTAIN NOVEL CLASS OF CARBON BLACK PRODUCTS POSSESSING USUALLY HIGH TINTING STRENGTHS AS REINFORCING ADDITIVES IN THE PREPARATION OF NATURAL AND SYNTHETIC RUBBER COMPOSITIONS HAVING IMPROVED REINFORCEMENT PROPERTIES.

Aqueous emulsion paints and pigment bases therefor

Abstract: IMPROVED AQUEOUS EMULSION TYPE PAINTS AND PIGMENT BASES THEREFOR ARE DESCRIBED IN WHICH THE PRINCIPAL OPACIFYING PIGMENT IS RUTILE TITANIA PIGMENT AND THERE IS ALSO INCORPORATED THEREWITH PRE 100 PARTS OF SAID RUTILE TITANIA PIGMENT BETWEEN ABOUT 1 AND ABOUT 20 PARTS BY WEIGHT, OF A SUBSTANTIALLY WATER-INSOLUBLE, HIGH MOLECULAR WEIGHT, CROSS-LINKED UREA-FORMALDEHYDE RESIN IN HIGHLY DISPERSED PARTICULATE FORM. SAID PARTICULATE UREA-FORMALDEHYDE RESIN IS CHARACTERIZED BY A BET SPECIFIC SURFACE AREA OF BETWEEN ABOUT 15 AND ABOUT 100 SQUARE METERS PER GRAM AND PREFERABLY HAS A VOLALITE CONTENT OF NOT OBER ABOUT 15% BY WEIGHT.

Centrifugal casting method

Abstract: A method of centrifugally casting hollow metal objects is provided in which molten self-disintegrating slag is added to the rotating mold immediately after casting molten metal and transform in the solid state giving a volume change which causes the slag to disintegrate therein.

Characterization of New Technology Carbon Blacks

Abstract: In this paper we have examined a limited number of conventional and new technology blacks, using the “t” method of nitrogen adsorption for comparison of surface area and dibutyl phthalate adsorption (DBPA) for comparison of structure. At a given “t” area the new technology blacks are of lower iodine number; conversely, at a given iodine number, the new technology blacks are of higher “t” area. This is not due to porosity, but rather to differences in carbon black-iodine surface interaction. The DBPA tests gives a fairly consistent measure of carbon black structure in rubber, for both types of blacks. An important difference between the two classes of black is in the higher tinting strength of new technology blacks, at a given “solid sphere” diameter (which depends primarily on the “t” area and to a lesser extent on the DBPA). We have introduced the use of a disk photosedimentometer for studying carbon black aggregate size distributions and have found that at a given “t” area, the distribution cur...

Precipitation strengthened alloys

Abstract: A precipitation strengthened alloy is provided having the composition: Tantalum 5-20 Tungsten 2 Chromium up to 30 Iron0-10 Carbon 0-0.3 Nickel 0-30 Silicon 0-1 Yttrium 0-0.2 Lanthanum0-0.2 Manganese 0-2 Cobalt + incidental impurities balance WHEREIN THE RATIO OF TANTALUM TO TUNGSTEN IS BETWEEN ABOUT 1 1/2 TO 2 1/2 AND THE MOLYBDENUM IS LESS THAN 1 PERCENT.

Film Reinforced Multifastened Mechanical Joints in Fibrous Composites

Abstract: [±45] graphite fiber/epoxy resin composites were fabricated to form double lap bolted joints, each containing three bolts abreast at constant pitch distance. The specimens were tested to measure the joint strenghtening effectiveness of colaminated boron/polyimide film, introduced locally at 6 or 12 volume percent levels. Such film additions increased the load transfer capacity of the joint systems to nearly double that of the corresponding fiber-only specimens. This behavior, in qualitative and quantitative agreement with the earlier experiments on single-bolted lug configurations, indicated that boron film can contribute significant tensile, bearing, and shear strength to this type of multifastened joint design. The resulting stiffness increase did not prevent the uniform distribution of the load among the several fasteners in these experiments.

Oxidation resistant alloys

Abstract: A weldable oxidation resistant cobalt-base alloy is provided containing a small but effective addition of lanthanum preferably in the range of 0.001 to 0.018 percent by weight.

Filler Reinforcement of Liquid Elastomers

Abstract: To realize the potential processing benefits of liquid rubbers, methods must be developed for producing acceptable reinforced compounds which retain the inherent rheological advantages of the uncured polymer. The most promising commercially available liquid rubbers are functionally terminated low molecular weight analogs of common general-purpose elastomers such as poly-(butadiene) or butadiene copolymers. In principle, these low molecular weight polymers can be vulcanized by a combination of chain extension and cross-linking to yield vulcanizates comparable to those from solid elastomers. Both cure reactions can be carried out simultaneously with a chemically specific polyfunctional coupling agent, or alternatively, chain extension with a difunctional reactant can be followed by use of accelerated sulfur or equivalent crosslinking agents. In contrast to certain polar polymers, liquid hydrocarbon rubbers yield relatively weak vulcanizates which are unsuitable for mechanical and tire applications....

Tensile Properties of Boron Carbide Ribbon in Titanium Matrix

Abstract: In the mechanical analysis of fiber-reinforced composite structures, the effect of reinforcement geometry, in particular, the effect of ribbon-shaped reinforcement elements on composite properties, has been treated by Foye [ I ] and by Halpin and Thomas [2]. Analysis has shown that the mechanical properties transverse to the ribbon axis increase with an increase in ribbon width/thickness (wlt) ratio, gradually approaching isotropy with the axial properties in the limit for extremely large w/t ratios. Experimental data to support the analysis has been limited, however, due to the difficulty in preparing suitable ribbon geometries for reinforcement materials. The present note reports some recent measurements on the mechanical properties of titanium composites reinforced by boron carbide ribbon elements with varying cross-section dimensions to provide experimental corroboration of the theory.

Amine curable polyepoxide compositions

Abstract: Amine curable epoxy potting compositions are disclosed which, in the cured state, have excellent impact or vibration absorbing properties and which are sufficiently friable as to be readily mechanically removed from a component potted therewith. The curable compositions of the invention comprise two particular genera of epoxy resins and a particular genus of surfactant modifier.