Abstract: A downhole tool comprises a 360-degree wear band placed circumferentially around a portion of the largest outer diameter (OD) of the tool. In some embodiments, the wear band comprises fiber, resin, and a hard mineral. In some embodiments, the hard mineral comprises alumina oxide, carbide, poly crystalline diamond, or combinations thereof. In some embodiments, the wear band has a thickness of from about 0.001 inch to about 0.5 inch or wherein the wear band has a width of from about 0.01 inch to about 1.0 inch or wherein the wear band is flush with the largest OD of the tool. In some embodiments, the portion of the largest outer diameter of the tool is a part of a mule shoe, or a gage ring, or a bottom sub. Methods of making such a wear band are also disclosed.

Abstract: The present disclosure provides a device and method for a composite fastener that can withstand the required shear stresses during operation of a downhole oil field device similar to a metal fastener until activated and yet be easily removable after shear or other intended failure. The composite fastener can act as a replacement for a typical metal fastener due to the enhanced strength of the composite fastener.

Abstract: A filament winding method and system without needing a resin dip bath are disclosed. The method comprises feeding a fiber band of a plurality of fibers onto a mandrel without dipping the fibers in a resin bath, and applying a resin onto the fiber band at or about where the fiber band contacts the mandrel or applied directly to the fiber band and then wound onto the mandrel so that the resin is between the mandrel and the fiber band at the point of contact. In some embodiments, the resin can be sprayed onto the fibers and in other embodiments, the resin can be delivered in at least one layer onto the fiber band that is then impregnated into the fiber band as the fiber band wraps around the mandrel. The fiber can comprise carbon fiber, basalt fiber, glass fibers, Kevlar fiber, polyester fiber, other fibers, or a combination thereof.

Abstract: In this disclosure, filament winding method and system without a resin dip bath are disclosed. The method comprises feeding a fiber on a mandrel without dipping the fiber in a resin bath; and applying a resin onto the fiber at the point of where the fiber contacts the mandrel. In an embodiment, the fiber comprises carbon fiber, basalt fiber, S-glass fiber, S-2 glass fiber, A-glass fiber, C-glass fiber, E-glass fiber, D-glass fiber, Kevlar fiber, ECR glass fiber. In an embodiment, the resin comprises polyester resin, vinylester resin, epoxy resin, phenolic resin, BMI resin, polyurethane resin, cyanate ester resin. In an embodiment, the fiber is fed on the mandrel at an angle of from about 25° to 65°, wherein the angle is defined as the angle between the fiber and a horizontal plane when the mandrel is placed horizontally. Further disclosed are parts made according to the instant filament winding method.

Abstract: Herein disclosed is a downhole tool comprising a 360-degree wear band placed circumferentially around a portion of the largest outer diameter (OD) of the tool. In some embodiments, the wear band comprises fiber, resin, and a hard mineral. In some embodiments, the hard mineral comprises alumina oxide, carbide, poly crystalline diamond, or combinations thereof. In some embodiments, the wear band has a thickness of from about 0.001 inch to about 0.5 inch or wherein the wear band has a width of from about 0.01 inch to about 1.0 inch or wherein the wear band is flush with the largest OD of the tool. In some embodiments, the portion of the largest outer diameter of the tool is a part of a mule shoe, or a gage ring, or a bottom sub. Methods of making such a wear band is also disclosed.

Abstract: Herein disclosed is a downhole tool comprising a dissolvable part, wherein the part is dissolved in the presence of moisture or water, at a temperature in the range of 150° F. to 400° F. and at a pressure in the range of 2 ksi to 12 ksi. In some embodiments, no solvent other than water is needed for the dissolvable part to dissolve. The dissolvable part is made from a material comprising resin or fiber or both. In some embodiments, at least 20% of the dissolvable part is dissolved. Also disclosed herein is a method for performing a downhole operation comprising: placing a downhole tool within a well bore, wherein the downhole tool comprises a dissolvable part, wherein the part is dissolved in the presence of moisture or water, at a temperature in the range of 150° F. to 400° F. and at a pressure in the range of 2 ksi to 12 ksi.

Abstract: Herein disclosed is a method of electrostatically coating a composite object comprising: a) Pretreating a surface of the composite object with a composition to induce conductivity; b) Applying a charge to the object after surface pretreatment; and c) Electrostatically applying a coating material to the object. In an embodiment, the method comprises cleaning the surface of the composite object prior to pretreating. Also described is a composite downhole tool pretreated with a surface pretreatment composition and electrostatically coated. In an embodiment, the composite downhole tool comprises bridge or frac plug mandrels, wedges, sleeves, noses, cones, mule shoes, extrusion limiters, slips, baffles, landing seats, frac balls, wireline tools, housings for measurement-while-drilling, housings for logging-while-drilling, or tubular parts.

Abstract: In this disclosure, filament winding method and system without a resin dip bath are disclosed. The method comprises feeding a fiber on a mandrel without dipping the fiber in a resin bath; and applying a resin onto the fiber at the point of where the fiber contacts the mandrel. In an embodiment, the fiber comprises carbon fiber, basalt fiber, S-glass fiber, S-2 glass fiber, A-glass fiber, C-glass fiber, E-glass fiber, D-glass fiber, Kevlar fiber, ECR glass fiber. In an embodiment, the resin comprises polyester resin, vinylester resin, epoxy resin, phenolic resin, BMI resin, polyurethane resin, cyanate ester resin. In an embodiment, the fiber is fed on the mandrel at an angle of from about 25° to 65°, wherein the angle is defined as the angle between the fiber and a horizontal plane when the mandrel is placed horizontally. Further disclosed are parts made according to the instant filament winding method.