Abstract: A method and composition for stimulating subterranean formations containing iron deposits. The composition comprises a compound comprising at least one member selected from the group consisting of dihydroxymaleic acid, salts of dihydroxymaleic acid and gluconodeltalactone. The method comprises contacting the subterranean formation in an appropriate manner with the above-described composition present in an amount sufficient to sequester iron.

Abstract: The present invention relates to a method of acidizing a subterranean formation or well bore employing an acidic solution containing a stabilized corrosion inhibitor composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon, an antimony compound, and a stabilizer which substantially prevents precipitation of solubilized antimony-containing compounds from aqueous solutions.

Abstract: A knife which has generally a blade and a handle wherein the blade folds into the handle; and wherein the handle has a first parallel plate and a second parallel plate which are secured to each other and spaced from each other by a spacer bushing and a fixed bushing to form therein a pocket into which the blade folds as it rotates around the fixed bushing. The fixed bushing has therein a slide hole into which the stem of a lock inserts. A biasing spring is installed in a bore in the stem and bears against a shoulder inside the stem and against a spring plate affixed to the outside of the first parallel plate, thereby biasing the stem and the lock through the second parallel plate. A button on the outside of the second parallel plate passes through a button hole therein, and the button is affixed to the end of the stem. The lock has a lock pin which protrudes through the first parallel plate and engages one of a plurality of lock pin holes in the blade securing the blade in the desired position.

Abstract: The present invention relates to a method of inhibiting the oxidative effect of an oxidative environment upon a metal surface utilizing a composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon, an antimony compound, and an aqueous fluid. The metal surface to be protected is contacted with the composition whereby a deposit or coating of at least a portion of the composition constituents is formed on the metal surface.

Abstract: An environmentally compatible high density drilling or blow-out control fluid is provided wherein densities between twenty-four (24) and forty (40) pounds per gallon can be achieved. Such preferred fluid is aqueous based, uses a non-toxic gelling agent such as fine iron oxide powder, a coarser first weighting material such as fine iron powder, and a second still coarser weighting material such as iron shot, steel shot or mixtures thereof.

Abstract: The present invention relates to a method of acidizing a subterranean formation or well bore employing an acidic solution containing a corrosion inhibitor composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon and an antimony compound.

Abstract: A composition and method for well completion and workover. The composition comprises water, various halogen salts and an acetylenic alcohol. Optionally, other ingredients can be added to the composition. The method is carried out by contacting the well at sufficient hydrostatic pressure to control the well.

Abstract: A composition for dissolving insoluble fluoride deposits and methods of treating subterranean formations and industrial vessels using such solution to remove fluoride deposits. The solvent comprises boric acid, methanol and hydrochloric acid.