Abstract: Shear-assisted extrusion assemblies are provided. The assemblies can include a billet containing assembly containing a billet comprising a billet outer material and a billet inner material in at least one cross-section; a tool operably engaged with the billet; an extrudate receiving channel configured to receive extrudate from the tool, wherein the extrudate comprises extruded outer material and extruded inner material in at least one cross-section, the extruded outer material being the same material as the billet outer material, and the extruded inner material being the same as the billet inner material. Methods for producing multi-material shear-assisted extrudate are also provided.

Abstract: The disclosure relates to a bore tube for a pressure compensation system in a roller cone drill bit. The bore tube includes a bit body having at least one support arm extending therefrom, a lubricant chamber in each support arm, a bore in each support arm extending from to the lubricant chamber to an exterior surface of each support arm, a tube in the bore of each support arm, and a floating bead in the tube and operable to move axially within the tube in response to a pressure of the environment surrounding the roller cone drill bit.

Abstract: A roller cone drill bit is disclosed. The drill bit includes a bit body with a support arm extending therefrom, and a cone assembly mounted on a journal extending from the support arm. The drill bit further includes a lubricant chamber in the support arm, and a compensator assembly in the lubricant chamber. The compensator assembly includes a lubricant container with a securing end. The compensator assembly further includes a clip ring coupled to the lubricant container and configured to retain the lubricant container in the lubricant chamber. Additionally, the compensator assembly includes a ring cap with a securing hole configured to couple to the securing end of the lubricant container. The ring cap includes a shoulder configured to retain the clip ring.

Abstract: The disclosure relates to a bore tube for a pressure compensation system in a roller cone drill bit. The bore tube includes a bit body having at least one support arm extending therefrom, a lubricant chamber in each support arm, a bore in each support arm extending from to the lubricant chamber to an exterior surface of each support arm, a tube in the bore of each support arm, and a floating bead in the tube and operable to move axially within the tube in response to a pressure of the environment surrounding the roller cone drill bit.

Abstract: A roller cone drill bit is disclosed. The drill bit includes a bit body with a support arm extending therefrom, and a cone assembly mounted on a journal extending from the support arm. The drill bit further includes a lubricant chamber in the support arm, and a compensator assembly in the lubricant chamber. The compensator assembly includes a lubricant container with a securing end. The compensator assembly further includes a clip ring coupled to the lubricant container and configured to retain the lubricant container in the lubricant chamber. Additionally, the compensator assembly includes a ring cap with a securing hole configured to couple to the securing end of the lubricant container. The ring cap includes a shoulder configured to retain the clip ring.

Abstract: An organic polyol ester of a polycarboxylic acid having formulae (Para) and/or (Meta) and/or (Ortho), wherein R.sub.6 is --(COOR.sub.1)x, or (I).sub.1 R.sub.7 is H; or R.sub.6 and R.sub.7 together for (II); R.sub.1 and R.sub.2 are hydrogen or --OR.sub.1 and --OR.sub.2 together form an anhydride (--0--) bond; x is an integer of 0 or 1; Z is an integer ranging from 1 to the number of hydroxy groups on the polyol and D is a polyol residue. Also disclosed are processes for the preparation of these polyol esters, a tanning composition comprising a metallic salt and a polyol ester, and a method of tanning using said composition.

Abstract: A method for protecting proteinaceous fibres, either dyed or in their natural form, against photodegradation and thermal degradation. The method comprises treating the fibres with a sulfonated s-triazine derivative of formula (I), wherein R.sup.1 is hydrogen, alkyl, hydroxyl, O-alky, OOC-alkyl or OOCNH-alkyl; R.sup.2 is hydrogen, alkyl or SO.sub.3 X; R.sup.3 is aryl, substituted aryl or O-alkyl; and X is hydrogen, NH.sub.4 or alkali metal, or formula (II), wherein R.sup.1 and R.sub.4 are hydrogen, alkyl, hydroxyl, O-alkyl, OCC-alkyl or OOCNH-alkyl; R.sup.2 and R.sup.5 are hydrogen, alkyl or --SO.sub.3 X; R.sup.3 is hydrogen or --SO.sub.3 X; R.sup.6 is aryl, substituted aryl, O-alkyl or O-aryl; and X is hydrogen, NH.sub.4 or alkali metal; under acidic conditions. The method is particularly suitable for treating dyed and undyed wool, silk, mohair and cashmere fibers, including blends thereof.

Abstract: A new tanning agent, isophorone dicarbamoylsulfonate, is provided for tanning cattle hides and sheepskins. A white leather which does not discolor with exposure to sunlight and which has good fill and tensile strength is produced. The tanning agent is also effective for retanning slack chrome-tanned and zirconium-tanned cattle hides and sheepskins.