Abstract: An aqueous gel comprising an aqueous fluid containing a polymeric gelling agent, a buffer, an aluminum-based crosslinking composition and a xanthan containing retardant composition. The gel is useful for fracturing and carrying propping agents within subterranean formations.

Abstract: A multiple acting lock is provided which prevents premature setting of the packer of a gravel pack tool by the setting piston of a setting tool. The lock comprises a locking cylinder which when in the locked position rotationally locks the setting tool with the gravel pack tool thereby allowing rotation of the tool during tripping to facilitate working the tool past tight spots. The lock also longitudinally locks the setting sleeve of the gravel pack tool to prevent premature setting of the packer of the gravel pack tool. The locking mechanism of the setting sleeve comprises keys located in keyholes and a sleeve inside the setting sleeve which protrude and engage with the setting sleeve. The locking cylinder when in a locked position covers the inside of the keyholes retaining the keys in engagement with the setting sleeve. When the locking cylinder is hydraulically moved to the unlocked position the keys slide inward out of the keyholes and out of engagement with the setting sleeve.

Abstract: Encapsulations comprised of a breaker enclosed within a membrane are utilized to break fluids used to fracture subterranean formations. The membrane of the encapsulation is permeable to at least one fluid in the subterranean formation or injected with the breaker such that the breaker diffuses through the membrane into the fracturing fluid. Thus, controlled amounts of breaker are released into the fracturing fluid.

Abstract: A fluid loss control additive for use in well cementing operations wherein the downhole temperature ranges from about 200.degree. to about 500.degree. F. The additive is a polymer comprised of 2-acrylamido-2-methyl propane-3-sulphonic acid, N-vinyl,-N-methylacetamide, in the presence or absence of arcylamide. This additive is also effective in saltwater cement slurries.

Abstract: This invention involves cementing compositions for the oil industry and their use in cementing wells. More specifically, this invention involves the control of the gas migration or gas channeling phenomenon that occurs during the setting of a cement slurry. A cementing composition, capable of inhibiting gas channeling, comprised of gaseous fluid, hydraulic cement, and a gas channeling inhibiting additive comprised of a copolymer 2-acrylamido-2 methylpropane-3-sulphonic acid, N-vinylacylamide and acrylamide, is provided.

Abstract: Films or sheets are fabricated from blends of an ethylenic homopolymer or copolymer, a butene-1 copolymer, and a propylene homopolymer or copolymer which result in good peel characteristics, and wherein such films or sheets will bond to a polypropylene substrate in a laminar structure by extrusion lamination without the need for an adhesive.

Abstract: Normally sparingly soluble magnesium alkoxide is solubilized in alkanol by the additional presence of certain acidic materials. The resulting solution is used to produce a mixture of substantially spherical particles, substantially free of fines, containing an adduct magnesium alkoxide. The particles are converted by conventional methods to a procatalyst precursor of an olefin polymerization catalyst of good activity and good selectivity to stereoregular polymer whenever appropriate, which catalyst produces polymer product of good morphology.

Abstract: The invention relates to a room temperature atmosphere pressure polymer concrete moldable composition comprising a thermosetting resin, vinyl monomer, catalyst, filler and a particular rubber component.

Abstract: The invention relates to a process for the preparation of an azidosulphonylbenzoic acid which comprises reacting a water-soluble salt of a chlorosulphonylbenzoic acid with hydrazine (N.sub.2 H.sub.4) in an aqueous medium, reacting the obtained hydrazinosulphonylbenzoic acid salt with nitrous acid in the same aqueous medium, acidifying the resulting aqueous solution comprising the azidosulphonylbenzoic acid salt, to precipitate the azidosulphonylbenzoic acid and separating the azidosulphonylbenzoic acid. The process is a one-pot process, which differs from a known process in that the intermediate, being the hydrazinosulphonylbenzoic acid salt, is not isolated.

Abstract: The present invention relates to a process for dulling molded block copolymer compositions comprising coating the surface of a molded block copolymer rubber composition with a dulling solution comprising a polymeric binder which is compatible with the molded block copolymer rubber composition, a matting agent and a suitable solvent and evaporating the solvent.

Abstract: This invention relates to a resin composition comprising functionalized polypropylene, functionalized low molecular weight polypropylene wax, a hydrogenated mono alkylene-conjugated diene block copolymer, oil, and a filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: This invention relates to a resin composition comprising polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, a functionalized low molecular weight polypropylene wax, oil, and a hydrated inorganic filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: A process for the production of moldings from a dry blend of radio frequency susceptible organic polymer particles and rigid inorganic particles wherein the dry blend mixture is poured into a non-radio frequency absorbing mold and scintered using a radio frequency field to form a composite structure.

Abstract: A method is provided for separating metal catalyst contaminants from organic polymers, typically polymers derived from dienes and/or vinyl arenes, by treatment with a dicarboxylic acid and an oxidant which forms an insoluble metal compound, then separating the insoluble compound to remove the contaminating metal.

Abstract: The present invention relates to a thermally stable modified selectively hydrogenated high 1,2 content block copolymer wherein at least one acid compound is grafted to the block copolymer at a secondary or tertiary carbon position.

Abstract: The present invention relates to a process for dulling molded block copolymer compositions comprising coating the surface of a molded block copolymer rubber composition with a dulling solution comprising a miscible quaternary mixture of a polymeric binder which is compatible with the molded block copolymer rubber composition, an azeotroping agent, water and a suitable solvent and evaporating the solvent.

Abstract: The invention relates to a method of coating a surface of a fiber blanket comprising forcing a plurality of probes through the fiber blanket until the probes extend beyond the surface to be coated, so that holes are formed in the fiber blanket, applying fluid coating material on the surface to be coated, retracting the probes from the fiber blanket, allowing the coating material to flow into the holes during the retraction of the probes, forming heads of the coating material at the uncoated surface of the fiber blanket, and allowing the coating material to harden. The invention relates moreover to an apparatus for carrying out this method. The coated fiber blanket obtained by the method according to the invention has the advantage that the hardened layer of coating material is firmly anchored to the blanket.

Abstract: The present invention involves a method of treating solutions of hydrogenated conjugated diene polymers contaminated with residues of nickel hydrogenation catalysts, wherein the solutions are first oxidized and then contacted with a ligand which readily forms a stable nickel compound.

Abstract: A process for the preparation of an oil-soluble, star-shaped product having viscosity index-improving and dispersant properties, comprising modifying a hydrogenated star-shaped polymer wherein said arms are hydrogenated homopolymers and copolymers of conjugated dienes and mono-alkenyl arenes, and wherein the hydrogenated polymer is metallated with an organolithium compound in the presence of a metallation promoter, and subsequently reacted with a vinyl pyridine or a carbonyl group containing organic compound.

Abstract: An alpha olefin polymerization reaction using a first alpha olefin monomer and a magnesium supported titanium halide/aluminum alkyl catalyst system wherein said system comprises:(a)(i) a procatalyst component;(ii) a cocatalyst component; and(iii) a selectivity control agent;(b) discontinuing addition of the procatalyst component;(c) adding sufficient sterically hindered phenolic hydrocarbon to the polymerization reaction contents to terminate the reaction; and(d) either(i) adding an amount of a second alpha olefin monomer and then adding an organoaluminum compound to restart the reaction; or(ii) adding an amount of said first alpha olefin monomer and a second alpha olefin monomer and then adding an organoaluminum compound to restart the reaction; or(iii) adding an amount of said first alpha olefin monomer and a second alpha olefin monomer and then adding an amount of an organoaluminum compound and additional procatalyst.